:root{--bg-primary: #0f172a;--bg-surface: #1e293b;--bg-elevated: #334155;--text-primary: #f1f5f9;--text-secondary: #94a3b8;--text-muted: #64748b;--accent-lesson: #f59e0b;--accent-milestone: #10b981;--accent-danger: #ef4444;--accent-info: #3b82f6;--radius-lg: 16px;--radius-md: 12px;--radius-sm: 8px}@media (prefers-reduced-motion: reduce){*{animation-duration:.01ms!important;transition-duration:.01ms!important}}*{box-sizing:border-box;margin:0;padding:0}html{font-size:18px}body{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg-primary);color:var(--text-primary);min-height:100vh;-webkit-font-smoothing:antialiased}input,textarea,button,select{font-family:inherit;font-size:1rem}button{min-height:48px;min-width:48px;cursor:pointer;border:none;border-radius:var(--radius-sm)}input,textarea,select{min-height:48px;border-radius:var(--radius-sm);border:2px solid var(--bg-elevated);background:var(--bg-surface);color:var(--text-primary);padding:12px 16px;width:100%}input:focus,textarea:focus,select:focus{outline:2px solid var(--accent-info);outline-offset:2px}