:root {
            --primary: #4F46E5;
            --primary-dark: #4338CA;
            --primary-light: #818CF8;
            --secondary: #0EA5E9;
            --success: #10B981;
            --warning: #F59E0B;
            --error: #EF4444;
            --gray-50: #F9FAFB;
            --gray-100: #F3F4F6;
            --gray-200: #E5E7EB;
            --gray-300: #D1D5DB;
            --gray-400: #9CA3AF;
            --gray-500: #6B7280;
            --gray-600: #4B5563;
            --gray-700: #374151;
            --gray-800: #1F2937;
            --gray-900: #111827;
            --white: #FFFFFF;
            --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
            --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
            --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
            --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
            --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
            --radius-sm: 6px; --radius: 8px; --radius-md: 12px; --radius-lg: 16px; --radius-xl: 24px;
        }
        *, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body { font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%); color: var(--gray-800); line-height: 1.6; min-height: 100vh; -webkit-font-smoothing: antialiased; }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }
        a:focus-visible, button:focus-visible, [role="button"]:focus-visible, [role="menuitem"]:focus-visible, [role="option"]:focus-visible, [role="tab"]:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            box-shadow: 0 0 0 3px rgba(79,70,229,0.16);
        }
        button:focus:not(:focus-visible), a:focus:not(:focus-visible) { outline: none; box-shadow: none; }
        .container { max-width: 1000px; margin: 0 auto; padding: 0 24px; }
        .header { padding: 16px 0; border-bottom: 1px solid var(--gray-200); position: sticky; top: 0; z-index: 100; backdrop-filter: blur(10px); background: rgba(255,255,255,0.95); }
        .header-content { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
        .logo { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--gray-900); }
        .logo-icon { width: 40px; height: 40px; background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%); border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; color: var(--white); }
        .logo-icon svg { width: 24px; height: 24px; }
        .logo-text { font-size: 1.25rem; font-weight: 700; letter-spacing: -0.025em; }
        @media (max-width: 600px) { .logo-text { display: none; } }
        .header-right { display: flex; align-items: center; gap: 10px; margin-left: auto; min-width: 0; }
        .header-nav-toggle {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            height: 46px;
            padding: 0 14px;
            border-radius: var(--radius);
            border: 1px solid var(--gray-300);
            background: var(--white);
            color: var(--gray-700);
            font-size: 0.875rem;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.2s ease;
        }
        .header-nav-toggle:hover { border-color: var(--gray-400); background: var(--gray-50); color: var(--gray-900); }
        .header-nav-toggle svg { width: 16px; height: 16px; }
        .header-sidebar-backdrop {
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, 0.35);
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.2s ease;
            z-index: 120;
        }
        .header-sidebar-backdrop.visible { opacity: 1; pointer-events: auto; }
        .header-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: min(340px, calc(100vw - 24px));
            background: #fff;
            border-right: 1px solid var(--gray-200);
            box-shadow: var(--shadow-xl);
            transform: translateX(-105%);
            transition: transform 0.24s ease;
            z-index: 130;
            padding: 16px 14px 20px;
            overflow-y: auto;
        }
        .header-sidebar.visible { transform: translateX(0); }
        .header-sidebar-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            padding: 4px 4px 10px;
            margin-bottom: 10px;
            border-bottom: 1px solid var(--gray-200);
            color: var(--gray-900);
            font-size: 0.95rem;
            font-weight: 800;
        }
        .header-sidebar-close {
            width: 30px;
            height: 30px;
            border: 1px solid var(--gray-300);
            border-radius: 8px;
            background: var(--white);
            color: var(--gray-600);
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }
        .header-sidebar-close svg { width: 16px; height: 16px; }
        .sidebar-section {
            border: 1px solid var(--gray-200);
            border-radius: var(--radius-md);
            background: var(--gray-50);
            margin-bottom: 10px;
            overflow: hidden;
        }
        .sidebar-section > summary {
            list-style: none;
            cursor: pointer;
            padding: 10px 12px;
            font-size: 0.78rem;
            color: var(--gray-500);
            font-weight: 800;
            letter-spacing: 0.05em;
            text-transform: uppercase;
            border-bottom: 1px solid var(--gray-200);
        }
        .sidebar-section > summary::-webkit-details-marker { display: none; }
        .sidebar-section-body {
            display: grid;
            gap: 8px;
            padding: 10px;
        }
        .sidebar-subnav {
            display: grid;
            gap: 6px;
        }
        .sidebar-submenu {
            display: none;
            gap: 6px;
            padding-left: 8px;
        }
        .sidebar-subnav.open .sidebar-submenu,
        .sidebar-subnav:hover .sidebar-submenu,
        .sidebar-subnav:focus-within .sidebar-submenu {
            display: grid;
        }
        .header-link-button.sub {
            padding-left: 14px;
            font-size: 0.82rem;
        }
        .header-sidebar .progress-menu { order: 0; width: 100%; }
        .header-sidebar .progress-button { width: 100%; justify-content: space-between; }
        .header-sidebar .progress-dropdown {
            position: static;
            margin-top: 8px;
            box-shadow: none;
            border: 1px solid var(--gray-200);
            padding: 8px;
            min-width: 0;
        }
        body.sidebar-open { overflow: hidden; }
        .header-nav-link { display: inline-flex; align-items: center; gap: 8px; height: 46px; padding: 0 14px; background: var(--white); border: 1px solid var(--gray-300); border-radius: var(--radius); font-size: 0.875rem; font-weight: 600; color: var(--gray-700); text-decoration: none; transition: all 0.2s ease; }
        .header-nav-link:hover { background: var(--gray-50); border-color: var(--gray-400); color: var(--gray-900); }
        .header-nav-link.active { background: rgba(79,70,229,0.08); border-color: rgba(79,70,229,0.35); color: var(--primary-dark); }
        .header-nav-link svg { width: 16px; height: 16px; }
        @media (max-width: 600px) { .header-nav-link span { display: none; } .header-nav-link { padding: 10px; } }
        .progress-menu { position: relative; order: 30; }
        .progress-button {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            height: 46px;
            padding: 0 14px;
            border-radius: var(--radius);
            border: 1px solid var(--gray-300);
            background: var(--white);
            color: var(--gray-700);
            font-size: 0.875rem;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.2s ease;
        }
        .progress-button:hover { border-color: var(--gray-400); background: var(--gray-50); color: var(--gray-900); }
        .progress-button svg { width: 16px; height: 16px; }
        .progress-button .chevron { width: 14px; height: 14px; color: var(--gray-500); transition: transform 0.2s ease; }
        .progress-button.open .chevron { transform: rotate(180deg); }
        .progress-dropdown {
            display: none;
            position: absolute;
            top: calc(100% + 8px);
            right: 0;
            min-width: 250px;
            padding: 10px;
            border-radius: var(--radius-md);
            border: 1px solid var(--gray-200);
            background: var(--white);
            box-shadow: var(--shadow-lg);
            z-index: 60;
        }
        .progress-dropdown.visible { display: block; animation: dropdownOpen 0.2s ease-out; }
        .progress-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            padding: 8px 8px;
            border-radius: var(--radius-sm);
            font-size: 0.82rem;
            color: var(--gray-600);
        }
        .progress-row strong { color: var(--gray-900); font-size: 0.84rem; }
        .progress-actions {
            margin-top: 8px;
            padding-top: 10px;
            border-top: 1px solid var(--gray-100);
            display: grid;
            grid-template-columns: 1fr;
            gap: 8px;
        }
        .progress-action-btn {
            height: 36px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--gray-300);
            background: var(--white);
            color: var(--gray-700);
            font-size: 0.8125rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s ease;
        }
        .progress-action-btn:hover { background: var(--gray-50); border-color: var(--gray-400); color: var(--gray-900); }
        .progress-action-btn.primary {
            border-color: rgba(79, 70, 229, 0.35);
            background: rgba(79, 70, 229, 0.08);
            color: var(--primary-dark);
        }
        .progress-action-btn.primary:hover {
            border-color: rgba(79, 70, 229, 0.48);
            background: rgba(79, 70, 229, 0.14);
        }
        .progress-action-btn.danger {
            border-color: rgba(239,68,68,0.4);
            color: #b91c1c;
            background: rgba(239,68,68,0.08);
        }
        .progress-action-btn.danger:hover {
            border-color: rgba(239,68,68,0.6);
            background: rgba(239,68,68,0.14);
            color: #991b1b;
        }
        .credits-display { display: flex; align-items: center; gap: 8px; height: 46px; padding: 0 16px; background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); border: 1px solid rgba(255,255,255,0.28); border-radius: 999px; font-size: 0.875rem; color: rgba(255,255,255,0.95); font-weight: 600; box-shadow: 0 8px 18px rgba(79,70,229,0.28); margin-left: auto; order: 60; cursor: pointer; user-select: none; position: relative; transition: transform 0.15s ease, box-shadow 0.2s ease; }
        .credits-display svg { width: 18px; height: 18px; color: rgba(255,255,255,0.95); }
        .credits-count { font-weight: 800; color: var(--white); }
        .credits-display:hover { transform: translateY(-1px); box-shadow: 0 10px 22px rgba(79,70,229,0.34); }
        .credits-tooltip {
            position: absolute;
            top: calc(100% + 10px);
            right: 0;
            min-width: 190px;
            border-radius: var(--radius-sm);
            padding: 10px 12px;
            border: 1px solid rgba(99,102,241,0.42);
            background: var(--white);
            color: var(--gray-800);
            box-shadow: 0 12px 26px rgba(15,23,42,0.16);
            font-size: 0.75rem;
            font-weight: 600;
            line-height: 1.5;
            text-align: left;
            white-space: normal;
            z-index: 80;
            opacity: 0;
            pointer-events: none;
            transform: translateY(-5px);
            transition: opacity 0.18s ease, transform 0.18s ease;
        }
        .credit-tip-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            font-size: 0.78rem;
            color: var(--gray-600);
        }
        .credit-tip-row + .credit-tip-row { margin-top: 4px; }
        .credit-tip-row strong { color: var(--gray-900); font-size: 0.82rem; }
        .credit-tip-row.total {
            margin-top: 8px;
            padding-top: 8px;
            border-top: 1px solid var(--gray-200);
            color: var(--primary-dark);
        }
        .credits-tooltip::before {
            content: '';
            position: absolute;
            top: -5px;
            right: 18px;
            width: 10px;
            height: 10px;
            background: var(--white);
            border-top: 1px solid rgba(99,102,241,0.42);
            border-left: 1px solid rgba(99,102,241,0.42);
            transform: rotate(45deg);
        }
        .credits-display:hover .credits-tooltip,
        .credits-display.tooltip-open .credits-tooltip {
            opacity: 1;
            transform: translateY(0);
        }
        @media (max-width: 900px) {
            .credits-display { padding: 0 12px; font-size: 0.8125rem; }
            .header-nav-toggle span { display: none; }
            .header-nav-toggle { padding: 0 10px; }
        }
        @media (max-width: 600px) {
            .credits-display { height: 42px; padding: 0 10px; font-size: 0.78rem; }
            .credits-tooltip { display: none; }
            .header-sidebar { width: calc(100vw - 10px); }
        }
        .user-menu { position: relative; order: 50; }
        .user-button { display: inline-flex; align-items: center; gap: 10px; height: 46px; min-width: 0; max-width: 220px; padding: 0 12px 0 6px; background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius-lg); cursor: pointer; transition: all 0.2s; }
        .user-button:hover { border-color: var(--gray-300); background: var(--gray-50); }
        .user-avatar { width: 32px; height: 32px; border-radius: 50%; background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%); display: flex; align-items: center; justify-content: center; color: var(--white); font-size: 0.875rem; font-weight: 600; }
        .user-avatar img { width: 100%; height: 100%; border-radius: 50%; object-fit: cover; }
        .user-name { font-size: 0.82rem; font-weight: 500; color: var(--gray-700); max-width: 154px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
        @media (max-width: 600px) { .user-name { display: none; } }
        .user-dropdown { position: absolute; top: calc(100% + 8px); right: 0; background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius-md); box-shadow: var(--shadow-lg); min-width: 220px; display: none; z-index: 50; overflow: hidden; }
        .user-dropdown.visible { display: block; animation: dropdownOpen 0.2s ease-out; }
        .user-dropdown-header { padding: 16px; border-bottom: 1px solid var(--gray-100); }
        .user-dropdown-email { font-size: 0.8125rem; color: var(--gray-500); word-break: break-all; }
        .user-dropdown-credits { margin-top: 12px; display: flex; flex-direction: column; gap: 6px; }
        .credit-row { display: flex; justify-content: space-between; font-size: 0.8125rem; }
        .credit-label { color: var(--gray-600); }
        .credit-value { font-weight: 600; color: var(--gray-900); }
        .user-dropdown-item { display: flex; align-items: center; gap: 10px; width: 100%; padding: 12px 16px; border: none; background: none; font-size: 0.875rem; color: var(--gray-700); cursor: pointer; transition: background 0.15s; text-align: left; }
        .user-dropdown-item:hover { background: var(--gray-50); }
        .user-dropdown-item svg { width: 18px; height: 18px; color: var(--gray-500); }
        .user-dropdown-item.danger { color: var(--error); }
        .user-dropdown-item.danger svg { color: var(--error); }
        .sign-in-button { display: flex; align-items: center; gap: 10px; height: 46px; padding: 0 20px; background: var(--white); border: 1px solid var(--gray-300); border-radius: var(--radius); font-size: 0.9375rem; font-weight: 500; color: var(--gray-700); cursor: pointer; transition: all 0.2s; order: 50; }
        .sign-in-button:hover { background: var(--gray-50); border-color: var(--gray-400); }
        .sign-in-button svg { width: 20px; height: 20px; }
        .header-link-button { display: inline-flex; align-items: center; gap: 8px; height: 42px; padding: 0 12px; background: var(--white); border: 1px solid var(--gray-300); border-radius: var(--radius); font-size: 0.875rem; font-weight: 600; color: var(--gray-700); cursor: pointer; transition: all 0.2s ease; width: 100%; justify-content: flex-start; }
        .header-link-button:hover { background: var(--gray-50); border-color: var(--gray-400); color: var(--gray-900); }
        .header-link-button svg { width: 18px; height: 18px; }
        .auth-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 200; align-items: center; justify-content: center; padding: 24px; }
        .auth-overlay.visible { display: flex; }
        .auth-modal { background: var(--white); border-radius: var(--radius-xl); padding: 40px; max-width: 420px; width: 100%; text-align: center; box-shadow: var(--shadow-xl); animation: modalOpen 0.3s ease-out; position: relative; }
        .auth-modal-close { position: absolute; top: 16px; right: 16px; width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; background: none; border: none; color: var(--gray-400); cursor: pointer; border-radius: 50%; transition: all 0.2s; }
        .auth-modal-close:hover { background: var(--gray-100); color: var(--gray-600); }
        .auth-modal-close svg { width: 20px; height: 20px; }
        .auth-modal-icon { width: 64px; height: 64px; background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%); border-radius: var(--radius-lg); display: flex; align-items: center; justify-content: center; margin: 0 auto 24px; color: var(--white); }
        .auth-modal-icon svg { width: 32px; height: 32px; }
        .auth-modal h2 { font-size: 1.5rem; font-weight: 700; color: var(--gray-900); margin-bottom: 8px; }
        .auth-modal-subtitle { font-size: 0.9375rem; color: var(--gray-600); margin-bottom: 24px; }
        .auth-form { text-align: left; }
        .form-group { margin-bottom: 16px; }
        .form-label { display: block; font-size: 0.875rem; font-weight: 500; color: var(--gray-700); margin-bottom: 6px; }
        .form-input { width: 100%; padding: 12px 16px; font-size: 1rem; border: 1px solid var(--gray-300); border-radius: var(--radius); transition: all 0.2s; background: var(--white); color: var(--gray-900); }
        .form-input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79,70,229,0.1); }
        .form-input::placeholder { color: var(--gray-400); }
        .password-input-wrapper { position: relative; }
        .password-toggle { position: absolute; right: 12px; top: 50%; transform: translateY(-50%); background: none; border: none; color: var(--gray-400); cursor: pointer; padding: 4px; }
        .password-toggle:hover { color: var(--gray-600); }
        .password-toggle svg { width: 20px; height: 20px; }
        .form-footer { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; font-size: 0.875rem; }
        .form-footer a { color: var(--primary); text-decoration: none; }
        .form-footer a:hover { text-decoration: underline; }
        .auth-submit-btn { width: 100%; padding: 14px 24px; background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); color: var(--white); border: none; border-radius: var(--radius); font-size: 1rem; font-weight: 600; cursor: pointer; transition: all 0.2s; }
        .auth-submit-btn:hover:not(:disabled) { opacity: 0.9; transform: translateY(-1px); }
        .auth-submit-btn:disabled { opacity: 0.6; cursor: not-allowed; }
        .auth-divider { display: flex; align-items: center; margin: 24px 0; color: var(--gray-400); font-size: 0.875rem; }
        .auth-divider::before, .auth-divider::after { content: ''; flex: 1; height: 1px; background: var(--gray-200); }
        .auth-divider span { padding: 0 16px; }
        .google-sign-in-button { display: flex; align-items: center; justify-content: center; gap: 12px; width: 100%; padding: 14px 24px; background: var(--white); border: 1px solid var(--gray-300); border-radius: var(--radius); font-size: 1rem; font-weight: 500; color: var(--gray-700); cursor: pointer; transition: all 0.2s; }
        .google-sign-in-button:hover { background: var(--gray-50); border-color: var(--gray-400); }
        .google-sign-in-button img { width: 20px; height: 20px; }
        .auth-switch { margin-top: 24px; font-size: 0.875rem; color: var(--gray-600); }
        .auth-switch a { color: var(--primary); text-decoration: none; font-weight: 500; }
        .auth-switch a:hover { text-decoration: underline; }
        .auth-error { margin-top: 16px; padding: 12px 16px; background: rgba(239,68,68,0.1); border-radius: var(--radius); font-size: 0.875rem; color: var(--error); text-align: center; display: none; }
        .auth-error.visible { display: block; }
        .auth-success { margin-top: 16px; padding: 12px 16px; background: rgba(16,185,129,0.1); border-radius: var(--radius); font-size: 0.875rem; color: var(--success); text-align: center; display: none; }
        .auth-success.visible { display: block; }
        .auth-view { display: none; }
        .auth-view.active { display: block; }
        .goal-modal-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(17,24,39,0.45);
            z-index: 210;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }
        .goal-modal-overlay.visible { display: flex; }
        .goal-modal {
            width: min(420px, 100%);
            background: var(--white);
            border: 1px solid var(--gray-200);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-xl);
            padding: 22px;
            animation: modalOpen 0.2s ease-out;
        }
        .goal-modal-title { font-size: 1.08rem; font-weight: 700; color: var(--gray-900); margin-bottom: 6px; }
        .goal-modal-subtitle { font-size: 0.875rem; color: var(--gray-500); margin-bottom: 14px; }
        .goal-modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 14px; }
        #goal-modal-cancel-btn,#goal-modal-save-btn{height:42px;min-width:122px;padding:0 16px;font-size:0.95rem;line-height:1.2}
        .goal-modal-error {
            display: none;
            margin-top: 10px;
            padding: 8px 10px;
            border-radius: var(--radius);
            border: 1px solid rgba(239,68,68,0.3);
            background: rgba(239,68,68,0.08);
            color: #991B1B;
            font-size: 0.8125rem;
        }
        .goal-modal-error.visible { display: block; }
        .delete-account-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(17,24,39,0.5);
            z-index: 220;
            align-items: center;
            justify-content: center;
            padding: 18px;
        }
        .delete-account-overlay.visible { display: flex; }
        .delete-account-modal {
            width: min(560px, 100%);
            background: var(--white);
            border: 1px solid var(--gray-200);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-xl);
            padding: 22px;
            animation: modalOpen 0.2s ease-out;
            display: grid;
            gap: 10px;
        }
        .delete-account-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
        }
        .delete-account-title { font-size: 1.08rem; font-weight: 700; color: var(--gray-900); }
        .delete-account-close {
            width: 34px;
            height: 34px;
            border-radius: 10px;
            border: 1px solid var(--gray-300);
            background: var(--white);
            color: var(--gray-600);
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }
        .delete-account-close svg { width: 16px; height: 16px; }
        .delete-account-subtitle {
            color: var(--gray-600);
            font-size: 0.89rem;
            line-height: 1.4;
            margin-bottom: 2px;
        }
        .delete-account-error {
            min-height: 18px;
            color: #b91c1c;
            font-size: 0.84rem;
            font-weight: 600;
        }
        .delete-account-actions {
            display: flex;
            justify-content: flex-end;
            gap: 8px;
            margin-top: 2px;
        }
        .onboarding-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(17,24,39,0.5);
            z-index: 220;
            align-items: center;
            justify-content: center;
            padding: 18px;
        }
        .onboarding-overlay.visible { display: flex; }
        .onboarding-modal {
            width: min(520px, 100%);
            background: var(--white);
            border: 1px solid var(--gray-200);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-xl);
            padding: 22px;
            animation: modalOpen 0.2s ease-out;
        }
        .onboarding-title { font-size: 1.08rem; font-weight: 700; color: var(--gray-900); margin-bottom: 6px; }
        .onboarding-subtitle { font-size: 0.86rem; color: var(--gray-600); margin-bottom: 12px; line-height: 1.45; }
        .onboarding-language-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
        .onboarding-language-btn {
            border: 1px solid var(--gray-300);
            background: var(--white);
            color: var(--gray-700);
            border-radius: var(--radius-sm);
            min-height: 40px;
            font-size: 0.86rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.15s ease;
        }
        .onboarding-language-btn:hover { border-color: var(--gray-400); background: var(--gray-50); }
        .onboarding-language-btn.active { border-color: rgba(79,70,229,0.5); background: rgba(79,70,229,0.1); color: var(--primary-dark); }
        .onboarding-custom-input { margin-top: 10px; width: 100%; }
        .onboarding-error {
            display: none;
            margin-top: 10px;
            padding: 8px 10px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(239,68,68,0.3);
            background: rgba(239,68,68,0.08);
            color: #991B1B;
            font-size: 0.82rem;
        }
        .onboarding-error.visible { display: block; }
        .onboarding-actions { margin-top: 12px; display: flex; justify-content: flex-end; }
        @media (max-width: 640px) {
            .onboarding-language-grid { grid-template-columns: 1fr; }
        }
        .back-to-login { display: inline-flex; align-items: center; gap: 6px; color: var(--gray-600); font-size: 0.875rem; text-decoration: none; margin-bottom: 20px; }
        .back-to-login:hover { color: var(--gray-900); }
        .back-to-login svg { width: 16px; height: 16px; }
        .sign-in-required { display: none; text-align: center; padding: 48px 24px; background: var(--gray-50); border-radius: var(--radius-lg); margin-top: 32px; }
        .sign-in-required.visible { display: block; }
        .sign-in-required p { font-size: 1rem; color: var(--gray-600); margin-bottom: 20px; }
        .hero { padding: 60px 0 40px; text-align: center; }
        .hero-badge { display: inline-flex; align-items: center; gap: 8px; padding: 8px 16px; background: linear-gradient(135deg, rgba(79,70,229,0.1) 0%, rgba(14,165,233,0.1) 100%); border: 1px solid rgba(79,70,229,0.2); border-radius: 20px; font-size: 0.875rem; font-weight: 500; color: var(--primary); margin-bottom: 24px; }
        .hero-badge svg { width: 16px; height: 16px; }
        .hero-title { font-size: clamp(2rem, 5vw, 3rem); font-weight: 800; color: var(--gray-900); line-height: 1.2; letter-spacing: -0.025em; margin-bottom: 16px; }
        .hero-title span { background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .hero-description { font-size: 1.125rem; color: var(--gray-600); max-width: 600px; margin: 0 auto 40px; }
        .features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 50px; }
        @media (max-width: 768px) { .features { grid-template-columns: 1fr; } }
        .feature-card { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius-lg); padding: 24px; text-align: center; transition: all 0.3s ease; }
        .feature-card:hover { border-color: var(--primary-light); box-shadow: var(--shadow-md); transform: translateY(-2px); }
        .feature-icon { width: 48px; height: 48px; background: var(--gray-100); border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; color: var(--primary); transition: all 0.3s ease; }
        .feature-card:hover .feature-icon { background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%); color: var(--white); }
        .feature-icon svg { width: 24px; height: 24px; }
        .feature-title { font-size: 1rem; font-weight: 600; color: var(--gray-900); margin-bottom: 8px; }
        .feature-description { font-size: 0.875rem; color: var(--gray-500); }
        .app-card { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius-xl); padding: 32px; box-shadow: var(--shadow-lg); margin-bottom: 40px; }
        .mode-section { margin-bottom: 32px; }
        .mode-label { display: block; font-size: 0.75rem; font-weight: 600; color: var(--gray-500); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 12px; }
        .mode-tabs { display: flex; gap: 8px; background: var(--gray-100); border-radius: var(--radius-md); padding: 4px; }
        @media (max-width: 500px) { .mode-tabs { flex-direction: column; } }
        .mode-tab { flex: 1; padding: 12px 16px; border: none; background: transparent; font-size: 0.875rem; font-weight: 500; color: var(--gray-600); cursor: pointer; border-radius: var(--radius); transition: all 0.2s ease; }
        .mode-tab:hover { color: var(--gray-900); }
        .mode-tab.active { background: var(--white); color: var(--gray-900); box-shadow: var(--shadow-sm); }
        .mode-description { margin-top: 16px; padding: 16px; background: var(--gray-50); border-radius: var(--radius); font-size: 0.875rem; color: var(--gray-600); display: flex; align-items: flex-start; gap: 12px; }
        .mode-description svg { width: 20px; height: 20px; color: var(--primary); flex-shrink: 0; margin-top: 1px; }
        .mode-credit-cost { margin-top: 8px; font-size: 0.8125rem; color: var(--gray-500); }
        .mode-credit-cost strong { color: var(--primary); }
        .mode-cost-summary { margin-top: 6px; font-size: 0.78rem; color: var(--gray-600); line-height: 1.45; }
        .upload-section { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 32px; }
        .upload-section.single-upload { grid-template-columns: 1fr; max-width: 400px; margin-left: auto; margin-right: auto; }
        .lecture-topic-field { grid-column: 1 / -1; }
        @media (max-width: 640px) { .upload-section { grid-template-columns: 1fr; } }
        .upload-zone { position: relative; background: var(--gray-50); border: 2px dashed var(--gray-300); border-radius: var(--radius-lg); padding: 32px 24px; text-align: center; cursor: pointer; transition: all 0.3s ease; }
        .upload-zone:hover { border-color: var(--primary); background: var(--white); }
        .upload-zone.drag-over { border-color: var(--primary); background: linear-gradient(135deg, rgba(79,70,229,0.08) 0%, rgba(14,165,233,0.08) 100%); transform: translateY(-2px) scale(1.01); box-shadow: 0 0 0 4px rgba(79,70,229,0.12); }
        .upload-zone.has-file { border-color: var(--success); border-style: solid; background: rgba(16,185,129,0.05); }
        .upload-zone.hidden { display: none; }
        .upload-zone input[type="file"] { display: none; }
        .upload-icon { width: 48px; height: 48px; margin: 0 auto 16px; color: var(--gray-400); transition: all 0.3s ease; }
        .upload-zone:hover .upload-icon { color: var(--primary); }
        .upload-zone.has-file .upload-icon { color: var(--success); }
        .upload-title { font-size: 0.9375rem; font-weight: 600; color: var(--gray-800); margin-bottom: 4px; }
        .upload-subtitle { font-size: 0.8125rem; color: var(--gray-500); }
        .upload-formats { margin-top: 12px; font-size: 0.75rem; color: var(--gray-600); }
        .upload-estimate { margin: 0 auto 20px; padding: 14px 16px; border: 1px solid var(--gray-200); border-radius: var(--radius); background: linear-gradient(135deg, rgba(79,70,229,0.06) 0%, rgba(14,165,233,0.06) 100%); }
        .upload-estimate-title { font-size: 0.8rem; font-weight: 700; color: var(--gray-700); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 6px; }
        .upload-estimate-time { font-size: 0.95rem; font-weight: 700; color: var(--gray-900); margin-bottom: 6px; }
        .upload-estimate-meta { font-size: 0.78rem; color: var(--gray-600); line-height: 1.45; }
        .upload-url-import { grid-column: 1 / -1; border: 1px solid var(--gray-200); border-radius: var(--radius); background: var(--white); padding: 12px; }
        .upload-url-import-head { display: flex; flex-direction: column; gap: 4px; margin-bottom: 8px; color: var(--gray-800); }
        .upload-url-import-hint { color: var(--gray-500); font-size: 0.78rem; font-weight: 500; }
        .upload-url-import-row { display: flex; gap: 8px; }
        .upload-url-input { flex: 1; min-width: 0; border: 1px solid var(--gray-300); border-radius: var(--radius-sm); padding: 10px 12px; font-size: 0.88rem; color: var(--gray-900); background: var(--white); }
        .upload-url-input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79,70,229,0.1); }
        .upload-url-button { border: 1px solid rgba(79,70,229,0.35); background: rgba(79,70,229,0.08); color: var(--primary-dark); border-radius: var(--radius-sm); padding: 0 14px; min-width: 116px; font-size: 0.83rem; font-weight: 700; cursor: pointer; transition: all 0.2s ease; }
        .upload-url-button:hover:not(:disabled) { background: rgba(79,70,229,0.14); border-color: rgba(79,70,229,0.45); }
        .upload-url-button:disabled { opacity: 0.65; cursor: not-allowed; }
        .upload-url-help { margin-top: 8px; color: var(--gray-500); font-size: 0.76rem; line-height: 1.45; display: flex; align-items: flex-start; gap: 8px; }
        .upload-url-help-icon { width: 16px; height: 16px; min-width: 16px; border-radius: 50%; border: 1px solid rgba(79,70,229,0.3); color: var(--primary); display: inline-flex; align-items: center; justify-content: center; font-size: 0.64rem; font-weight: 700; margin-top: 1px; background: rgba(79,70,229,0.06); }
        .upload-url-help-text code { font-size: 0.72rem; }
        .upload-url-help-link { display: inline-flex; align-items: center; gap: 4px; margin-top: 5px; color: var(--primary-dark); font-size: 0.76rem; font-weight: 600; text-decoration: none; }
        .upload-url-help-link:hover { text-decoration: underline; color: var(--primary); }
        .upload-url-status { margin-top: 8px; min-height: 1.2em; color: var(--gray-600); font-size: 0.8rem; }
        .upload-url-status.error { color: #991B1B; }
        @media (max-width: 640px) {
            .upload-url-import-row { flex-direction: column; }
            .upload-url-button { width: 100%; min-height: 40px; }
        }
        .quickstart-card { margin: 0 0 16px; padding: 14px 16px; border: 1px solid rgba(79,70,229,0.25); border-radius: var(--radius-md); background: linear-gradient(135deg, rgba(79,70,229,0.08) 0%, rgba(14,165,233,0.08) 100%); }
        .quickstart-title { font-size: 0.85rem; color: var(--primary-dark); font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; margin-bottom: 6px; }
        .quickstart-copy { font-size: 0.88rem; color: var(--gray-700); line-height: 1.45; }
        .quickstart-actions { margin-top: 10px; display: flex; gap: 8px; flex-wrap: wrap; }
        .quickstart-btn { border: 1px solid var(--gray-300); border-radius: var(--radius); background: var(--white); color: var(--gray-700); padding: 8px 12px; font-size: 0.82rem; font-weight: 600; cursor: pointer; transition: all 0.2s ease; }
        .quickstart-btn:hover { border-color: var(--gray-400); background: var(--gray-50); }
        .quickstart-btn.primary { border-color: var(--primary); color: var(--white); background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); }
        .quickstart-btn.primary:hover { opacity: 0.92; }
        .file-info { margin-top: 16px; padding: 12px 16px; background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius); text-align: left; display: flex; align-items: center; justify-content: space-between; gap: 12px; cursor: pointer; transition: border-color 0.2s ease, box-shadow 0.2s ease; }
        .file-info:hover { border-color: var(--gray-400); box-shadow: var(--shadow-sm); }
        .file-details { flex: 1; min-width: 0; }
        .file-name { font-size: 0.8125rem; font-weight: 600; color: var(--gray-800); word-break: break-all; display: flex; align-items: center; gap: 8px; }
        .file-name svg { width: 16px; height: 16px; color: var(--success); flex-shrink: 0; }
        .file-size { font-size: 0.75rem; color: var(--gray-500); margin-top: 2px; margin-left: 24px; }
        .file-remove { width: 28px; height: 28px; display: flex; align-items: center; justify-content: center; background: var(--gray-100); border: none; border-radius: 50%; color: var(--gray-500); cursor: pointer; transition: all 0.2s; flex-shrink: 0; }
        .file-remove:hover { background: var(--error); color: var(--white); }
        .file-remove svg { width: 16px; height: 16px; }
        .button-section { text-align: center; }
        .process-button { display: inline-flex; align-items: center; justify-content: center; gap: 10px; background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); color: var(--white); border: none; padding: 16px 32px; font-size: 1rem; font-weight: 600; border-radius: var(--radius-md); cursor: pointer; transition: all 0.3s ease; min-width: 200px; box-shadow: 0 4px 14px 0 rgba(79,70,229,0.4); }
        .process-button:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 6px 20px 0 rgba(79,70,229,0.5); }
        .process-button:disabled { background: var(--gray-300); cursor: not-allowed; box-shadow: none; }
        .process-button svg { width: 20px; height: 20px; }
        .no-credits-warning { margin-top: 14px; font-size: 0.875rem; color: var(--primary-dark); display: none; background: linear-gradient(135deg, rgba(238,242,255,0.95) 0%, rgba(224,231,255,0.95) 52%, rgba(219,234,254,0.95) 100%); border: 1px solid rgba(99,102,241,0.35); border-radius: var(--radius); padding: 12px 12px; text-align: center; box-shadow: 0 10px 20px rgba(79,70,229,0.12); }
        .no-credits-warning.visible { display: block; animation: dropdownOpen 0.2s ease-out; }
        .no-credits-warning a { display: inline-flex; align-items: center; justify-content: center; margin-left: 8px; padding: 6px 12px; border-radius: var(--radius-sm); background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%); border: none; color: var(--white); text-decoration: none; font-weight: 700; cursor: pointer; transition: all 0.2s ease; box-shadow: 0 4px 12px rgba(79,70,229,0.24); }
        .no-credits-warning a:hover { transform: translateY(-1px); box-shadow: 0 6px 16px rgba(79,70,229,0.32); }
        .progress-section { display: none; margin-top: 32px; padding-top: 32px; border-top: 1px solid var(--gray-200); }
        .progress-section.visible { display: block; }
        .progress-header { text-align: center; margin-bottom: 32px; }
        .progress-title { font-size: 1.25rem; font-weight: 700; color: var(--gray-900); margin-bottom: 8px; }
        .progress-subtitle { font-size: 0.875rem; color: var(--gray-500); }
        .progress-steps { display: flex; justify-content: center; gap: 16px; margin-bottom: 32px; }
        .progress-steps.single-step { justify-content: center; }
        .progress-step { display: flex; flex-direction: column; align-items: center; gap: 12px; flex: 1; max-width: 160px; }
        .step-indicator { width: 56px; height: 56px; border-radius: 50%; background: var(--gray-100); border: 3px solid var(--gray-200); display: flex; align-items: center; justify-content: center; font-size: 1.125rem; font-weight: 700; color: var(--gray-400); transition: all 0.4s ease; }
        .progress-step.active .step-indicator { background: rgba(79,70,229,0.1); border-color: var(--primary); color: var(--primary); animation: pulse 2s ease-in-out infinite; }
        .progress-step.complete .step-indicator { background: var(--success); border-color: var(--success); color: var(--white); }
        .step-label { font-size: 0.8125rem; font-weight: 500; color: var(--gray-500); text-align: center; }
        .progress-step.active .step-label { color: var(--primary); font-weight: 600; }
        .progress-step.complete .step-label { color: var(--success); }
        .progress-status { text-align: center; padding: 20px; background: var(--gray-50); border-radius: var(--radius-md); color: var(--gray-600); font-size: 0.9375rem; display: flex; align-items: center; justify-content: center; gap: 12px; }
        .progress-status.error { background: rgba(239,68,68,0.1); color: var(--error); }
        .progress-retry { display: none; justify-content: center; margin-top: 12px; }
        .progress-retry-btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 1px solid var(--gray-300); background: var(--white); color: var(--gray-700); border-radius: var(--radius); padding: 10px 16px; font-size: 0.875rem; font-weight: 600; cursor: pointer; transition: all 0.2s ease; }
        .progress-retry-btn:hover { border-color: var(--primary); color: var(--primary-dark); background: rgba(79,70,229,0.06); }
        .progress-retry-btn:disabled { opacity: 0.6; cursor: not-allowed; }
        .spinner { width: 24px; height: 24px; border: 3px solid var(--gray-200); border-top-color: var(--primary); border-radius: 50%; animation: spin 1s linear infinite; }
        .results-section { display: none; margin-top: 32px; padding-top: 32px; border-top: 1px solid var(--gray-200); }
        .results-section.visible { display: block; }
        .results-header { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; margin-bottom: 24px; }
        .results-title { display: flex; align-items: center; gap: 12px; font-size: 1.25rem; font-weight: 700; color: var(--gray-900); }
        .results-title-icon { width: 32px; height: 32px; background: rgba(16,185,129,0.1); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: var(--success); }
        .results-title-icon svg { width: 18px; height: 18px; }
        .results-actions { display: flex; gap: 12px; flex-wrap: wrap; }
        .action-button { display: inline-flex; align-items: center; gap: 8px; padding: 10px 18px; font-size: 0.875rem; font-weight: 500; border-radius: var(--radius); cursor: pointer; transition: all 0.2s ease; border: 1px solid var(--gray-300); background: var(--white); color: var(--gray-700); }
        .action-button:hover { border-color: var(--gray-400); background: var(--gray-50); }
        .action-button svg { width: 18px; height: 18px; }
        .action-button.primary { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); color: var(--white); border: none; }
        .action-button.primary:hover { opacity: 0.9; }
        .dropdown { position: relative; }
        .dropdown-content { display: none; position: absolute; right: 0; top: calc(100% + 8px); background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius-md); box-shadow: var(--shadow-lg); min-width: 240px; z-index: 50; overflow: hidden; animation: dropdownOpen 0.2s ease-out; }
        .dropdown-content.visible { display: block; }
        .dropdown-item { display: block; width: 100%; padding: 12px 16px; border: none; background: none; text-align: left; font-size: 0.875rem; color: var(--gray-700); cursor: pointer; transition: background 0.15s ease; }
        .dropdown-item:hover { background: var(--gray-50); }
        .dropdown-item span { display: block; font-size: 0.75rem; color: var(--gray-500); margin-top: 2px; }
        .dropdown-divider { height: 1px; background: var(--gray-100); margin: 4px 0; }
        .results-content { background: var(--gray-50); border: 1px solid var(--gray-200); border-radius: var(--radius-md); padding: 28px; max-height: 500px; overflow-y: auto; font-size: 0.9375rem; line-height: 1.75; }
        .results-content h1 { font-size: 1.5rem; font-weight: 700; color: var(--gray-900); margin: 32px 0 16px 0; padding-bottom: 12px; border-bottom: 2px solid var(--gray-200); }
        .results-content h1:first-child { margin-top: 0; }
        .results-content h2 { font-size: 1.25rem; font-weight: 600; color: var(--gray-800); margin: 28px 0 12px 0; }
        .results-content h3 { font-size: 1.0625rem; font-weight: 600; color: var(--gray-700); margin: 24px 0 10px 0; }
        .results-content p { margin: 14px 0; color: var(--gray-700); }
        .results-content ul, .results-content ol { margin: 14px 0; padding-left: 24px; }
        .results-content li { margin: 8px 0; color: var(--gray-700); }
        .results-content strong { font-weight: 600; color: var(--gray-800); }
        .new-process-section { margin-top: 24px; text-align: center; }
        .new-process-button { display: inline-flex; align-items: center; gap: 8px; padding: 12px 24px; font-size: 0.875rem; font-weight: 500; color: var(--gray-600); background: var(--white); border: 1px solid var(--gray-300); border-radius: var(--radius); cursor: pointer; transition: all 0.2s ease; }
        .new-process-button:hover { color: var(--gray-900); border-color: var(--gray-400); }
        .new-process-button svg { width: 18px; height: 18px; }
        .generation-controls { margin: 4px 0 20px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
        @media (max-width: 640px) { .generation-controls { grid-template-columns: 1fr; } }
        .generation-controls.hidden { display: none !important; }
        .advanced-settings { margin: 4px 0 16px; }
        .advanced-settings-toggle { width: 100%; border: 1px solid var(--gray-300); border-radius: var(--radius); padding: 10px 12px; background: var(--white); color: var(--gray-800); font-size: 0.875rem; font-weight: 700; display: inline-flex; align-items: center; justify-content: space-between; gap: 8px; cursor: pointer; transition: all 0.2s ease; }
        .advanced-settings-toggle:hover { border-color: var(--gray-400); background: var(--gray-50); }
        .advanced-settings-toggle svg { width: 16px; height: 16px; color: var(--gray-500); transition: transform 0.2s ease; }
        .advanced-settings-toggle.open svg { transform: rotate(180deg); }
        .advanced-settings-body { display: none; margin-top: 10px; }
        .advanced-settings-body.visible { display: block; }
        .generation-control { display: flex; flex-direction: column; gap: 8px; background: var(--gray-50); border: 1px solid var(--gray-200); border-radius: var(--radius-md); padding: 12px; }
        .generation-control.wide { grid-column: 1 / -1; }
        .control-label { font-size: 0.8125rem; color: var(--gray-600); font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; }
        .control-note { font-size: 0.8125rem; color: var(--gray-500); }
        .study-tools-header { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
        .study-tools-toggle { width: 100%; border: 1px solid var(--gray-300); border-radius: var(--radius); padding: 10px 12px; font-size: 0.9rem; background: var(--white); color: var(--gray-800); cursor: pointer; text-align: left; display: flex; align-items: center; justify-content: space-between; gap: 10px; transition: all 0.2s ease; }
        .study-tools-toggle:hover { border-color: var(--primary-light); }
        .study-tools-toggle svg { width: 16px; height: 16px; color: var(--gray-500); transition: transform 0.2s ease; }
        .study-tools-toggle.open svg { transform: rotate(180deg); }
        .study-tools-panel { display: none; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin-top: 8px; }
        .study-tools-panel.visible { display: grid; animation: dropdownOpen 0.2s ease-out; }
        .tool-chip { border: 1px solid var(--gray-300); border-radius: var(--radius); padding: 10px 12px; background: var(--white); color: var(--gray-700); font-size: 0.875rem; font-weight: 600; cursor: pointer; transition: all 0.2s ease; }
        .tool-chip:hover { border-color: var(--success); color: var(--gray-900); }
        .tool-chip.active { border-color: var(--success); background: rgba(16,185,129,0.12); color: #065F46; }
        .tool-chip .chip-badge { display: inline-block; margin-left: 6px; padding: 1px 6px; border-radius: 999px; font-size: 0.67rem; font-weight: 700; letter-spacing: 0.03em; text-transform: uppercase; color: var(--primary-dark); background: rgba(79,70,229,0.14); }
        .amount-chips { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; }
        .amount-chip { border: 1px solid var(--gray-300); border-radius: var(--radius); padding: 8px 10px; background: var(--white); color: var(--gray-700); font-size: 0.8125rem; font-weight: 600; cursor: pointer; transition: all 0.2s ease; text-align: center; }
        .amount-chip.active { border-color: var(--primary); background: rgba(79,70,229,0.1); color: var(--primary-dark); }
        .amount-chip:disabled { opacity: 0.45; cursor: not-allowed; }
        .interview-options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
        .interview-option { border: 1px solid var(--gray-300); border-radius: var(--radius); padding: 10px 12px; background: var(--white); color: var(--gray-700); font-size: 0.875rem; font-weight: 600; cursor: pointer; transition: all 0.2s ease; text-align: left; }
        .interview-option.active { border-color: var(--success); background: rgba(16,185,129,0.12); color: #065F46; }
        .interview-option:disabled { cursor: not-allowed; opacity: 0.55; background: var(--gray-50); border-color: var(--gray-200); color: var(--gray-500); }
        .app-select { position: relative; }
        .app-select-button { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 10px; border: 1px solid var(--gray-300); border-radius: var(--radius); padding: 10px 12px; font-size: 0.9375rem; color: var(--gray-800); background: var(--white); cursor: pointer; transition: all 0.2s ease; }
        .app-select-button:hover { border-color: var(--primary-light); }
        .app-select-button.open { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79,70,229,0.1); }
        .app-select-button svg { width: 16px; height: 16px; color: var(--gray-500); transition: transform 0.2s ease; }
        .app-select-button.open svg { transform: rotate(180deg); }
        .app-select-menu { display: none; position: absolute; left: 0; right: 0; top: calc(100% + 8px); background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius-md); box-shadow: var(--shadow-lg); z-index: 60; overflow: hidden; max-height: 320px; overflow-y: auto; }
        .app-select-menu.visible { display: block; animation: dropdownOpen 0.2s ease-out; }
        .app-select-item { width: 100%; border: none; background: var(--white); text-align: left; padding: 10px 12px; font-size: 0.9rem; color: var(--gray-700); cursor: pointer; transition: background 0.15s ease; }
        .app-select-item:hover { background: var(--gray-50); }
        .app-select-item.active { background: rgba(79,70,229,0.1); color: var(--primary-dark); font-weight: 600; }
        .language-custom-input { width: 100%; border: 1px solid var(--gray-300); border-radius: var(--radius); padding: 10px 12px; font-size: 0.9375rem; color: var(--gray-800); background: var(--white); margin-top: 8px; }
        .language-custom-input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79,70,229,0.1); }
        .focus-dashboard { display: grid; grid-template-columns: 260px 1fr; gap: 20px; }
        @media (max-width: 900px) { .focus-dashboard { grid-template-columns: 1fr; } }
        .focus-sidebar { background: var(--gray-50); border: 1px solid var(--gray-200); border-radius: var(--radius-md); padding: 14px; }
        .focus-tabs { display: flex; flex-direction: column; gap: 8px; margin-bottom: 16px; }
        .focus-tab { display: flex; align-items: center; justify-content: space-between; gap: 10px; border: 1px solid var(--gray-200); background: var(--white); border-radius: var(--radius); padding: 10px 12px; font-size: 0.875rem; color: var(--gray-700); cursor: pointer; }
        .focus-tab.active { border-color: var(--primary-light); color: var(--gray-900); box-shadow: var(--shadow-sm); }
        .focus-tab .badge { background: var(--gray-100); color: var(--gray-700); border-radius: 999px; font-size: 0.75rem; padding: 2px 8px; font-weight: 600; }
        .focus-tab.active .badge { background: rgba(79,70,229,0.12); color: var(--primary-dark); }
        .sidebar-actions { display: flex; flex-direction: column; gap: 10px; }
        .sidebar-primary-actions { display: grid; gap: 10px; }
        .sidebar-actions .action-button, .sidebar-actions .new-process-button { width: 100%; justify-content: center; }
        .more-actions-button { width: 100%; }
        .more-actions-dropdown-content .dropdown-item { display: flex; align-items: center; gap: 10px; justify-content: flex-start; }
        .more-actions-dropdown-content .dropdown-item svg { width: 16px; height: 16px; flex-shrink: 0; color: var(--gray-500); }
        .focus-main { min-width: 0; }
        .focus-pane { display: none; }
        .focus-pane.active { display: block; }
        .study-warning { background: rgba(245,158,11,0.12); color: #92400E; border: 1px solid rgba(245,158,11,0.35); border-radius: var(--radius); padding: 10px 12px; font-size: 0.875rem; margin-bottom: 12px; }
        .billing-receipt {
            display: none;
            background: rgba(79, 70, 229, 0.08);
            color: #312e81;
            border: 1px solid rgba(79, 70, 229, 0.24);
            border-radius: var(--radius);
            padding: 10px 12px;
            font-size: 0.86rem;
            margin-bottom: 12px;
            line-height: 1.45;
        }
        .billing-receipt.visible { display: block; }
        .flashcard-wrap { display: flex; flex-direction: column; align-items: center; gap: 14px; }
        .flashcard-3d { width: min(100%, 720px); height: 360px; perspective: 1200px; cursor: pointer; }
        .flashcard-inner { position: relative; width: 100%; height: 100%; transform-style: preserve-3d; transition: transform 0.55s ease; }
        .flashcard-inner.flipped { transform: rotateY(180deg); }
        .flashcard-face { position: absolute; inset: 0; backface-visibility: hidden; border-radius: var(--radius-lg); border: 1px solid var(--gray-200); background: linear-gradient(135deg, rgba(79,70,229,0.06) 0%, rgba(14,165,233,0.08) 100%); box-shadow: var(--shadow-md); display: flex; align-items: center; justify-content: center; padding: 30px; text-align: center; }
        .flashcard-face.back { transform: rotateY(180deg); background: linear-gradient(135deg, rgba(14,165,233,0.08) 0%, rgba(79,70,229,0.06) 100%); }
        .flashcard-label { position: absolute; top: 16px; left: 16px; font-size: 0.75rem; color: var(--gray-500); font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; }
        .flashcard-text { font-size: 1.15rem; color: var(--gray-900); line-height: 1.6; white-space: pre-wrap; }
        .flashcard-controls { display: flex; align-items: center; justify-content: center; gap: 12px; flex-wrap: wrap; }
        .flashcard-progress { font-size: 0.875rem; color: var(--gray-600); min-width: 120px; text-align: center; }
        .quiz-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 12px; }
        .quiz-score { font-size: 0.875rem; color: var(--gray-700); font-weight: 600; }
        .quiz-question { font-size: 1.1rem; color: var(--gray-900); margin-bottom: 16px; }
        .quiz-options { display: grid; grid-template-columns: 1fr; gap: 10px; }
        .quiz-option { border: 1px solid var(--gray-300); background: var(--white); border-radius: var(--radius); padding: 12px 14px; text-align: left; font-size: 0.9375rem; color: var(--gray-800); cursor: pointer; transition: all 0.2s ease; }
        .quiz-option:hover:not(:disabled) { border-color: var(--primary-light); background: var(--gray-50); }
        .quiz-option.correct { border-color: var(--success); background: rgba(16,185,129,0.12); color: #065F46; }
        .quiz-option.wrong { border-color: var(--error); background: rgba(239,68,68,0.12); color: #991B1B; }
        .quiz-option:disabled { cursor: default; }
        .quiz-explanation { margin-top: 12px; background: rgba(14,165,233,0.08); border: 1px solid rgba(14,165,233,0.2); border-radius: var(--radius); padding: 12px 14px; font-size: 0.9rem; color: var(--gray-700); display: none; }
        .quiz-explanation.visible { display: block; animation: dropdownOpen 0.2s ease-out; }
        .quiz-next { margin-top: 12px; }
        .pane-empty { font-size: 0.9rem; color: var(--gray-500); padding: 16px; border: 1px dashed var(--gray-300); border-radius: var(--radius); background: var(--gray-50); }
        .pricing-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 200; align-items: center; justify-content: center; padding: 24px; overflow-y: auto; }
        .pricing-overlay.visible { display: flex; }
        .pricing-modal { background: var(--white); border-radius: var(--radius-xl); padding: 40px; max-width: 780px; width: 100%; box-shadow: var(--shadow-xl); animation: modalOpen 0.3s ease-out; position: relative; margin: auto; }
        .pricing-modal-close { position: absolute; top: 16px; right: 16px; width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; background: none; border: none; color: var(--gray-400); cursor: pointer; border-radius: 50%; transition: all 0.2s; }
        .pricing-modal-close:hover { background: var(--gray-100); color: var(--gray-600); }
        .pricing-modal-close svg { width: 20px; height: 20px; }
        .pricing-modal-icon { width: 64px; height: 64px; background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%); border-radius: var(--radius-lg); display: flex; align-items: center; justify-content: center; margin: 0 auto 24px; color: var(--white); }
        .pricing-modal-icon svg { width: 32px; height: 32px; }
        .pricing-modal h2 { font-size: 1.5rem; font-weight: 700; color: var(--gray-900); margin-bottom: 8px; text-align: center; }
        .pricing-modal-subtitle { font-size: 0.9375rem; color: var(--gray-600); margin-bottom: 32px; text-align: center; }
        .pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
        @media (max-width: 700px) { .pricing-grid { grid-template-columns: 1fr; } .pricing-modal { padding: 28px 20px; } }
        .pricing-category { display: flex; flex-direction: column; gap: 12px; }
        .pricing-category-header { display: flex; align-items: center; gap: 10px; padding-bottom: 12px; border-bottom: 2px solid var(--gray-100); }
        .pricing-category-icon { width: 36px; height: 36px; background: var(--gray-100); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; color: var(--primary); }
        .pricing-category-icon svg { width: 20px; height: 20px; }
        .pricing-category-name { font-size: 0.9375rem; font-weight: 600; color: var(--gray-900); }
        .bundle-card { background: var(--gray-50); border: 1px solid var(--gray-200); border-radius: var(--radius-md); padding: 20px; transition: all 0.2s ease; position: relative; }
        .bundle-card:hover { border-color: var(--primary-light); box-shadow: var(--shadow-md); }
        .bundle-card.best-value { border-color: var(--primary); background: rgba(79,70,229,0.03); }
        .best-value-badge { position: absolute; top: -10px; right: 12px; background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%); color: var(--white); font-size: 0.6875rem; font-weight: 700; padding: 3px 10px; border-radius: 20px; text-transform: uppercase; letter-spacing: 0.05em; }
        .bundle-credits { font-size: 1.25rem; font-weight: 700; color: var(--gray-900); margin-bottom: 4px; }
        .bundle-description { font-size: 0.8125rem; color: var(--gray-500); margin-bottom: 12px; }
        .bundle-price { font-size: 1.5rem; font-weight: 800; color: var(--gray-900); margin-bottom: 4px; }
        .bundle-price-per { font-size: 0.75rem; color: var(--gray-400); margin-bottom: 16px; }
        .bundle-buy-btn { width: 100%; padding: 10px 16px; font-size: 0.875rem; font-weight: 600; border: 1px solid var(--gray-300); border-radius: var(--radius); cursor: pointer; transition: all 0.2s ease; background: var(--white); color: var(--primary); }
        .bundle-buy-btn:hover:not(:disabled) { background: var(--gray-50); border-color: var(--primary); }
        .bundle-card.best-value .bundle-buy-btn { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); color: var(--white); border: none; }
        .bundle-card.best-value .bundle-buy-btn:hover:not(:disabled) { opacity: 0.9; }
        .bundle-buy-btn:disabled { opacity: 0.6; cursor: not-allowed; }
        .pricing-footer { margin-top: 24px; text-align: center; font-size: 0.8125rem; color: var(--gray-400); display: flex; align-items: center; justify-content: center; gap: 6px; }
        .pricing-footer svg { width: 14px; height: 14px; }
        /* History Modal */
        .history-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 200; align-items: center; justify-content: center; padding: 24px; overflow-y: auto; }
        .history-overlay.visible { display: flex; }
        .history-modal { background: var(--white); border-radius: var(--radius-xl); padding: 40px; max-width: 520px; width: 100%; box-shadow: var(--shadow-xl); animation: modalOpen 0.3s ease-out; position: relative; margin: auto; }
        .history-modal-close { position: absolute; top: 16px; right: 16px; width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; background: none; border: none; color: var(--gray-400); cursor: pointer; border-radius: 50%; transition: all 0.2s; }
        .history-modal-close:hover { background: var(--gray-100); color: var(--gray-600); }
        .history-modal-close svg { width: 20px; height: 20px; }
        .history-modal-icon { width: 64px; height: 64px; background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%); border-radius: var(--radius-lg); display: flex; align-items: center; justify-content: center; margin: 0 auto 24px; color: var(--white); }
        .history-modal-icon svg { width: 32px; height: 32px; }
        .history-modal h2 { font-size: 1.5rem; font-weight: 700; color: var(--gray-900); margin-bottom: 8px; text-align: center; }
        .history-modal-subtitle { font-size: 0.9375rem; color: var(--gray-600); margin-bottom: 24px; text-align: center; }
        .history-list { display: flex; flex-direction: column; gap: 12px; max-height: 400px; overflow-y: auto; }
        .history-item { display: flex; align-items: center; justify-content: space-between; padding: 16px; background: var(--gray-50); border: 1px solid var(--gray-200); border-radius: var(--radius-md); }
        .history-item-left { flex: 1; min-width: 0; }
        .history-item-name { font-size: 0.9375rem; font-weight: 600; color: var(--gray-900); margin-bottom: 4px; }
        .history-item-date { font-size: 0.8125rem; color: var(--gray-500); }
        .history-item-credits { font-size: 0.75rem; color: var(--gray-400); margin-top: 2px; }
        .history-item-price { font-size: 1rem; font-weight: 700; color: var(--gray-900); white-space: nowrap; margin-left: 16px; }
        .history-empty { text-align: center; padding: 40px 20px; color: var(--gray-500); font-size: 0.9375rem; }
        .history-empty svg { width: 48px; height: 48px; color: var(--gray-300); margin-bottom: 16px; }
        .history-empty-note { margin-top: 8px; font-size: 0.84rem; color: var(--gray-500); }
        .history-empty-action { margin-top: 12px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--gray-300); border-radius: var(--radius); background: var(--white); color: var(--gray-700); padding: 8px 12px; font-size: 0.82rem; font-weight: 600; cursor: pointer; transition: all 0.2s ease; }
        .history-empty-action:hover { border-color: var(--gray-400); background: var(--gray-50); }
        .history-loading { text-align: center; padding: 40px 20px; color: var(--gray-500); font-size: 0.9375rem; display: flex; flex-direction: column; align-items: center; gap: 12px; }
        .history-skeleton-list { display: flex; flex-direction: column; gap: 12px; }
        .history-skeleton-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 14px;
            padding: 16px;
            border-radius: var(--radius-md);
            border: 1px solid var(--gray-200);
            background: var(--gray-50);
        }
        .history-skeleton-left { flex: 1; min-width: 0; }
        .history-skeleton-line {
            height: 12px;
            border-radius: 999px;
            background: linear-gradient(90deg, #eceff7 0%, #dde3f3 50%, #eceff7 100%);
            background-size: 200% 100%;
            animation: shimmer 1.2s ease-in-out infinite;
            margin-bottom: 8px;
        }
        .history-skeleton-line:last-child { margin-bottom: 0; }
        .history-skeleton-line.title { width: 58%; height: 13px; }
        .history-skeleton-line.meta { width: 82%; }
        .history-skeleton-line.submeta { width: 66%; }
        .history-skeleton-price {
            width: 72px;
            height: 16px;
            border-radius: 999px;
            background: linear-gradient(90deg, #eceff7 0%, #dde3f3 50%, #eceff7 100%);
            background-size: 200% 100%;
            animation: shimmer 1.2s ease-in-out infinite;
        }
        .toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(100px); background: var(--gray-900); color: var(--white); padding: 14px 24px; border-radius: var(--radius-md); font-size: 0.9375rem; font-weight: 500; box-shadow: var(--shadow-xl); opacity: 0; transition: all 0.3s ease; z-index: 1000; display: flex; align-items: center; gap: 10px; }
        .toast.visible { transform: translateX(-50%) translateY(0); opacity: 1; }
        .toast.success { background: var(--success); }
        .toast.error { background: var(--error); }
        .toast.info { background: var(--primary); }
        .toast svg { width: 20px; height: 20px; }
        @keyframes spin { to { transform: rotate(360deg); } }
        @keyframes pulse { 0%, 100% { box-shadow: 0 0 0 0 rgba(79,70,229,0.4); } 50% { box-shadow: 0 0 0 8px rgba(79,70,229,0); } }
        @keyframes dropdownOpen { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }
        @keyframes modalOpen { from { opacity: 0; transform: scale(0.95); } to { opacity: 1; transform: scale(1); } }
        @keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }