:root{--bg: #f7f8fa;--card-bg: #ffffff;--primary: #2563eb;--primary-hover: #1d4ed8;--primary-light: #eff6ff;--danger: #dc2626;--text: #111827;--muted: #6b7280;--border: #e5e7eb;--radius: 8px;--nav-bg: rgba(255, 255, 255, .85);--nav-border: rgba(17, 24, 39, .08);--hero-bg: radial-gradient(ellipse at top, #eef2ff 0%, #f7f8fa 70%);--hero-title: linear-gradient(135deg, #111827 0%, #4f46e5 50%, #7c3aed 100%);--feature-card-bg: #ffffff;--feature-card-border: rgba(17, 24, 39, .08);--text-strong: #1e293b;--text-secondary: #64748b;--input-bg: #ffffff;--input-border: #e2e8f0;--sidebar-bg: #fafbfc;--sidebar-border: #e8ecf0;--section-bg: linear-gradient(180deg, #f7f8fa 0%, #ffffff 100%);--footer-border: #e5e7eb}html[data-theme=dark]{--bg: #0a0a0a;--card-bg: #111111;--primary: #3b82f6;--primary-hover: #2563eb;--primary-light: #1e3a5f;--text: #ffffff;--muted: #888888;--border: #222222;--nav-bg: rgba(10, 10, 10, .9);--nav-border: rgba(255, 255, 255, .1);--hero-bg: radial-gradient(ellipse at top, 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