@import"https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap";:root{--bg-primary: #f4f8fa;--bg-secondary: rgba(255, 255, 255, .56);--bg-tertiary: rgba(255, 255, 255, .42);--bg-card: rgba(255, 255, 255, .68);--bg-glass: rgba(248, 252, 252, .52);--bg-hover: rgba(255, 255, 255, .88);--bg-active: rgba(255, 255, 255, .96);--surface-soft: rgba(242, 247, 248, .78);--surface-mist: rgba(234, 243, 246, .7);--text-primary: #303843;--text-secondary: #647181;--text-tertiary: #929dab;--text-muted: #aeb7c3;--accent: #5cc9c0;--accent-bright: #319f96;--accent-dim: #9de5dd;--accent-sky: #a4d9f3;--accent-glow: rgba(92, 201, 192, .16);--color-unlearned: #94a3b8;--color-unlearned-bg: rgba(148, 163, 184, .15);--color-difficult: #ef4444;--color-difficult-bg: rgba(239, 68, 68, .15);--color-vague: #f59e0b;--color-vague-bg: rgba(245, 158, 11, .15);--color-mastered: #10b981;--color-mastered-bg: rgba(16, 185, 129, .15);--border: rgba(255, 255, 255, .32);--border-bright: rgba(255, 255, 255, .56);--shadow-sm: 0 10px 30px rgba(70, 88, 104, .05);--shadow-md: 0 20px 50px rgba(70, 88, 104, .06);--shadow-lg: 0 28px 80px rgba(70, 88, 104, .08);--shadow-glow: 0 18px 42px rgba(92, 201, 192, .12);--sidebar-width: 286px;--detail-width: 408px;--header-height: 78px;--font-display: "Inter", -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif;--font-body: "Inter", -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif;--radius-sm: 12px;--radius-md: 20px;--radius-lg: 28px;--radius-xl: 34px;--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-normal: .25s cubic-bezier(.4, 0, .2, 1);--transition-slow: .4s cubic-bezier(.4, 0, .2, 1);--glass-blur-strong: 14px;--glass-blur-medium: 10px;--glass-blur-light: 6px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;width:100%;overflow:hidden}body{font-family:var(--font-body);background:radial-gradient(circle at 0% 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