:root,:root[data-theme=light]{--ink:#1a1d23;--mute:#5b6472;--line:#d7dbe1;--accent:#2f6fed;--warm:#b45309;--bg:#f5f6f8;--card:#fff;--tint:#eaf0ff;--danger:#b91c1c;--ok:#15803d}:root[data-theme=dark]{--ink:#eef1f5;--mute:#a2abb8;--line:#33383f;--accent:#6ea8fe;--warm:#f0b429;--bg:#14161a;--card:#1e2127;--tint:#1b2436;--danger:#ff6b6b;--ok:#4ade80}:root[data-theme=terminal]{--ink:#3f6;--mute:#1f7a37;--line:#114f22;--accent:#b6ffce;--warm:#ffb703;--bg:#000;--card:#061006;--tint:#0a2010;--danger:#ff3b30;--ok:#3f6}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.app{max-width:1100px;margin:0 auto;padding:0 16px 32px}.app-header{z-index:10;background:var(--bg);border-bottom:1px solid var(--line);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;padding:14px 4px;display:flex;position:sticky;top:0}.app-header-titles h1{margin:0;font-size:20px}.app-header-subline{color:var(--mute);margin:2px 0 0;font-size:13px}.app-header-actions{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.header-btn{border:1px solid var(--line);background:var(--card);color:var(--ink);cursor:pointer;border-radius:8px;padding:6px 12px;font-size:13px}.header-btn:hover{border-color:var(--accent)}.theme-switcher{border:1px solid var(--line);border-radius:8px;gap:4px;padding:2px;display:flex}.theme-switcher-btn{color:var(--mute);text-transform:capitalize;cursor:pointer;background:0 0;border:none;border-radius:6px;padding:5px 9px;font-size:12px}.theme-switcher-btn.is-active{background:var(--tint);color:var(--ink)}.class-rules{border:1px solid var(--line);background:var(--card);border-radius:10px;margin-top:14px;padding:10px 14px}.class-rules 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var(--line);border-radius:12px;flex-direction:column;gap:8px;padding:12px;display:flex;position:relative}.student-tile.is-warm{border-top-color:var(--warm)}.student-tile.is-danger{border-top-color:var(--danger)}.tile-dot{border-radius:50%;width:9px;height:9px;position:absolute;top:8px;right:8px}.tile-dot-warm{background:var(--warm)}.tile-dot-danger{background:var(--danger)}.tile-nick{margin:0;font-size:25px;font-weight:600;line-height:1.15}.apple-row{align-items:center;gap:8px;display:flex}.apple-row-apples{font-size:32px;line-height:1}.apple-row-pill{color:var(--ink);background:var(--tint);border-radius:999px;padding:2px 9px;font-size:13px;font-weight:700}.tile-buttons-main{gap:8px;display:flex}.tile-btn{border:1px solid var(--line);background:var(--bg);color:var(--ink);cursor:pointer;border-radius:10px;flex:1;padding:6px 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