:root{--bg: #f1f5f9;--card: #ffffff;--ink: #1e293b;--muted: #64748b;--line: #e2e8f0;--accent: #0021A5;--accent-d: #001a82;--teal: #FA4616;--teal-d: #d63c10;--green-t: #166534;--green-bg: #dcfce7;--red-t: #991b1b;--red-bg: #fee2e2;--tile-bg: #f8fafc}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}.hidden{display:none!important}body{background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Arial,sans-serif;font-size:16px;line-height:1.5}.wrap{max-width:680px;margin:0 auto;padding:18px 16px 40px}.header{margin-bottom:16px}.header h1{font-size:26px;font-weight:800;letter-spacing:-.4px}.header .sub{color:var(--muted);font-size:15px;margin-top:3px}.tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin-bottom:16px}.tab-btn{padding:13px 8px;border-radius:13px;border:1.5px solid var(--line);background:var(--card);cursor:pointer;font:inherit;font-weight:600;font-size:13px;color:var(--muted);transition:border-color .1s,color 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.1s}.ctrl-btn:hover{border-color:var(--muted)}.ctrl-btn.primary{background:var(--teal);border-color:var(--teal);color:#fff}.ctrl-btn.primary:hover{background:var(--teal-d);border-color:var(--teal-d)}.ctrl-btn.challenge-start{background:var(--accent);border-color:var(--accent);color:#fff}.ctrl-btn.challenge-start:hover{background:var(--accent-d);border-color:var(--accent-d)}.ctrl-btn.challenge-end{background:#dc2626;border-color:#dc2626;color:#fff}.ctrl-btn.challenge-end:hover{background:#b91c1c;border-color:#b91c1c}@media(max-width:600px){.wrap{padding:16px 12px 32px}.header{margin-bottom:12px}.header h1{font-size:24px;letter-spacing:-.3px}.header .sub{font-size:14px;margin-top:2px}.tier-row{gap:8px;margin-bottom:8px;flex-wrap:wrap}.tier-row-label{font-size:10px;margin-right:0}.tier-btn{padding:7px 14px;font-size:12px}.tabs{grid-template-columns:repeat(2,1fr);gap:6px;margin-bottom:12px}.tab-btn{padding:10px 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