* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            background: var(--page-bg);
            color: var(--text-primary);
            min-height: 100vh;
        }

        /* Header */
        .page-header {
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            padding: 16px 24px;
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .header-inner {
            max-width: 900px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .logo-link {
            display: flex;
            align-items: center;
            text-decoration: none;
            gap: 10px;
        }

        .logo-img {
            height: 32px;
            width: auto;
        }

        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 500;
            text-decoration: none;
            color: var(--text-secondary);
            background: var(--surface-soft);
            border: 1px solid var(--border);
            transition: all 0.15s ease;
        }

        .btn-back:hover {
            background: var(--primary-soft);
            color: var(--primary);
        }

        .btn-back .material-icons {
            font-size: 18px;
        }

        .theme-toggle {
            padding: 8px;
            border-radius: 6px;
            background: var(--surface-soft);
            border: 1px solid var(--border);
            cursor: pointer;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .theme-toggle:hover {
            background: var(--primary-soft);
            color: var(--primary);
        }

        .theme-toggle .material-icons {
            font-size: 20px;
        }

        /* Main Content */
        .page-content {
            max-width: 900px;
            margin: 0 auto;
            padding: 40px 24px 80px;
        }

        /* Footer */
        .page-footer {
            background: var(--surface);
            border-top: 1px solid var(--border);
            padding: 24px;
            text-align: center;
        }

        .footer-links {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 24px;
            flex-wrap: wrap;
        }

        .footer-links a {
            color: var(--text-secondary);
            text-decoration: none;
            font-size: 14px;
        }

        .footer-links a:hover {
            color: var(--primary);
        }

        .footer-copy {
            margin-top: 12px;
            font-size: 13px;
            color: var(--text-secondary);
        }

        /* Hide theme icon based on mode */
        [data-theme="dark"] .icon-dark { display: none; }
        [data-theme="light"] .icon-light,
        :root:not([data-theme="dark"]) .icon-light { display: none; }

        .partial-title {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }