*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #f8fafc;--surface: #ffffff;--border: #e2e8f0;--text: #0f172a;--muted: #64748b;--primary: #2563eb;--primary-light: #dbeafe;--radius: 10px;--shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.05)}body{font-family:Segoe UI,system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.5;min-height:100vh}a{color:inherit;text-decoration:none}button{cursor:pointer;font-family:inherit}input,textarea,select{font-family:inherit}.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:8px;border:1px solid transparent;font-size:14px;font-weight:500;transition:all 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td{background:var(--bg)}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;z-index:200;display:flex;align-items:center;justify-content:center;padding:20px}.modal{background:#fff;border-radius:14px;padding:24px;width:100%;max-width:480px;box-shadow:0 20px 60px #00000026}.modal-title{font-size:18px;font-weight:700;margin-bottom:16px}.flip-scene{perspective:1000px}.flip-card{transform-style:preserve-3d;transition:transform .4s ease;position:relative}.flip-card.flipped{transform:rotateY(180deg)}.flip-face{position:absolute;width:100%;backface-visibility:hidden;-webkit-backface-visibility:hidden}.flip-back{transform:rotateY(180deg)}@media (max-width:640px){.page,.page-wide{padding:16px 12px 40px}.grid-2,.grid-3{grid-template-columns:1fr}.nav-links .nav-link{padding:6px 8px;font-size:13px}}