/* ──────────────────────────────────────────────────────────────────────────
   Shared design system — loaded by BOTH index.html (local) and multi.html.
   Canonical look lives here; per-file layout (HUD, game board, file-specific
   screens) stays inline in each file. See DESIGN §9.
   ────────────────────────────────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
:root{
  --bg:#0d0d0f;--surface:#16161a;--surface2:#1e1e24;
  --border:rgba(255,255,255,0.08);--border2:rgba(255,255,255,0.18);
  --text:#f0f0f0;--text2:#888;--text3:#444;
  --radius:10px;--radius-lg:16px;
}

/* Screen system */
.screen{display:none;width:100%;height:100%;overflow-y:auto;}
.screen.active{display:flex;flex-direction:column;align-items:center;justify-content:center;animation:fadeIn 0.2s ease;}
@keyframes fadeIn{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}

/* Content frame (conic-gradient border) — menus and lobby screens */
.content-box,.lobby-screen{
  width:100%;max-width:720px;padding:1.25rem 2rem;
  background:transparent;border-radius:var(--radius-lg);position:relative;z-index:0;
}
.lobby-screen{max-width:560px;padding:2rem;}
.content-box::before,.lobby-screen::before{
  content:'';position:absolute;inset:-1.5px;border-radius:calc(var(--radius-lg) + 1.5px);
  background:conic-gradient(from 0deg,#ff5555,#ff9f43,#ffd700,#44dd77,#00ddff,#4d8fff,#cc66ff,#ff6b9d,#ff5555);
  z-index:-2;
}
.content-box::after,.lobby-screen::after{
  content:'';position:absolute;inset:0;border-radius:var(--radius-lg);background:rgba(13,13,15,0.95);z-index:-1;
}

/* Headings */
.page-title{font-size:38px;font-weight:700;letter-spacing:-1.5px;margin-bottom:4px;}
.page-sub{font-size:13px;color:var(--text2);margin-bottom:1.5rem;}
.section-label{font-size:13px;font-weight:600;letter-spacing:1px;text-transform:uppercase;color:var(--text2);margin-bottom:8px;}

/* Buttons */
.btn-primary{padding:12px 40px;border-radius:var(--radius);border:none;background:var(--text);color:var(--bg);font-size:15px;font-weight:700;cursor:pointer;font-family:inherit;transition:opacity .15s,transform .1s;}
.btn-primary:hover{opacity:.85;}.btn-primary:active{transform:scale(.97);}
.btn-primary.green{background:#44dd77;color:#000;width:100%;font-size:16px;}
.btn-secondary{padding:11px 20px;border-radius:var(--radius);border:1px solid rgba(255,255,255,0.15);background:rgba(0,0,0,0.5);color:var(--text2);font-size:13px;font-weight:500;cursor:pointer;font-family:inherit;transition:all .15s;}
.btn-secondary:hover{color:var(--text);border-color:rgba(255,255,255,0.4);}
.btn-danger{padding:6px 12px;border-radius:6px;border:1px solid rgba(255,80,80,0.3);background:transparent;color:rgba(255,80,80,0.7);font-size:11px;cursor:pointer;font-family:inherit;transition:all .15s;}
.btn-danger:hover{border-color:rgba(255,80,80,0.7);color:#ff5555;}
.btn-row{display:flex;gap:10px;flex-wrap:wrap;align-items:center;}

/* Text input (menus) */
.input-field{width:100%;background:var(--surface);border:1px solid var(--border2);border-radius:var(--radius);padding:10px 14px;color:var(--text);font-size:14px;font-family:inherit;outline:none;margin-bottom:1rem;}
.input-field:focus{border-color:var(--text);}

/* Difficulty buttons */
.diff-btns{display:flex;gap:8px;margin-bottom:1.5rem;}
.diff-btn{flex:1;padding:10px 8px;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface);color:var(--text2);font-size:13px;cursor:pointer;font-family:inherit;transition:all .15s;text-align:center;}
.diff-btn:hover{border-color:var(--border2);color:var(--text);}
.diff-btn.active{border-color:var(--border2);color:var(--text);background:var(--surface2);}
.diff-btn .dn{font-size:14px;font-weight:700;display:block;margin-bottom:2px;}
.diff-btn .dd{font-size:11px;color:var(--text3);}
.diff-btn.active .dd{color:var(--text2);}

/* Modal overlay (pause / result / archive) */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.75);z-index:200;display:none;align-items:center;justify-content:center;}
.modal-overlay.open{display:flex;}
.modal{background:var(--surface);border:1px solid var(--border2);border-radius:var(--radius-lg);padding:24px;width:300px;text-align:center;}
.modal h3{font-size:16px;font-weight:600;margin-bottom:6px;}
.modal p{font-size:13px;color:var(--text2);margin-bottom:20px;min-height:20px;}

/* Side panel (in-game player cards) */
#side-panel{width:230px;flex-shrink:0;background:#0a0a0c;border-left:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden;}
#side-players{flex:1;overflow-y:auto;padding:8px;display:flex;flex-direction:column;gap:6px;}
.sp-row{display:flex;align-items:stretch;gap:7px;}
.sp-pos{flex-shrink:0;width:20px;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;color:var(--text3);font-variant-numeric:tabular-nums;}
.sp-card{flex:1;display:flex;flex-direction:column;gap:5px;padding:9px 11px;border:1.5px solid var(--border);border-radius:var(--radius);background:var(--surface);transition:opacity .4s,filter .4s;}
.sp-card.dead{opacity:.45;filter:grayscale(0.6);}
.sp-card-top{display:flex;align-items:center;gap:8px;}
.sp-dot{width:11px;height:11px;border-radius:50%;flex-shrink:0;}
.sp-name{flex:1;font-size:13px;font-weight:600;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.sp-time{font-size:13px;font-weight:700;font-variant-numeric:tabular-nums;color:var(--text2);}
.sp-fx{display:flex;gap:3px;flex-wrap:wrap;height:18px;font-size:14px;align-items:center;overflow:hidden;}

/* Audio controls — docked footer at the bottom of the menu window */
.audio-footer{display:flex;gap:14px;justify-content:center;align-items:center;margin-top:1rem;padding-top:1rem;border-top:1px solid var(--border);}
#music-ctrl{display:inline-flex;align-items:center;gap:8px;background:var(--surface);border:1px solid var(--border2);border-radius:20px;padding:6px 12px;}
#music-btn{background:none;border:none;color:var(--text2);font-size:18px;cursor:pointer;padding:0;line-height:1;transition:color .15s;}
#music-btn:hover{color:var(--text);}
#music-vol{-webkit-appearance:none;width:72px;height:3px;background:var(--border2);border-radius:2px;outline:none;cursor:pointer;}
#music-vol::-webkit-slider-thumb{-webkit-appearance:none;width:13px;height:13px;background:var(--text2);border-radius:50%;cursor:pointer;}
#music-waiting{font-size:11px;color:var(--text3);}

/* HUD progress bar (winner bonus) */
#hud-bar-wrap{width:70px;height:3px;background:var(--border);border-radius:2px;overflow:hidden;display:none;}
#hud-bar-fill{height:100%;border-radius:2px;transition:width .1s linear;}

/* Color swatch + name input + color picker popup (shared menu component) */
.color-swatch{width:26px;height:26px;border-radius:50%;cursor:pointer;border:2px solid transparent;transition:all .15s;flex-shrink:0;}
.color-swatch:hover{border-color:rgba(255,255,255,0.5);transform:scale(1.1);}
.player-name-input{background:transparent;border:none;border-bottom:1px solid var(--border);color:var(--text);font-size:14px;font-weight:500;font-family:inherit;padding:3px 0;outline:none;width:100%;transition:border-color .15s;}
.player-name-input:focus{border-bottom-color:var(--border2);}
.color-picker-popup{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);background:var(--surface);border:1px solid var(--border2);border-radius:var(--radius-lg);padding:14px;z-index:100;display:none;gap:8px;flex-wrap:wrap;width:268px;box-shadow:0 20px 60px rgba(0,0,0,0.7);}
.color-picker-popup.open{display:flex;}
.color-option{width:30px;height:30px;border-radius:50%;cursor:pointer;border:2px solid transparent;transition:all .15s;}
.color-option.taken{opacity:.28;cursor:not-allowed;}
.color-option.available:hover{transform:scale(1.15);border-color:rgba(255,255,255,0.6);}
.color-option.chosen{border-color:#fff;transform:scale(1.12);}
.popup-overlay{position:fixed;inset:0;z-index:99;display:none;}
.popup-overlay.open{display:block;}

/* SFX mute button (sits next to the music control) */
#sfx-ctrl{display:inline-flex;align-items:center;background:var(--surface);border:1px solid var(--border2);border-radius:20px;padding:6px 12px;}
#sfx-btn{background:none;border:none;color:var(--text2);font-size:18px;cursor:pointer;padding:0;line-height:1;transition:color .15s;}
#sfx-btn:hover{color:var(--text);}