/* ═══════════════════════════════════════════════════════════
   CHAMPCHASE — OST PAGE STYLES (ORIGINAL SOUNDTRACK)
   ═══════════════════════════════════════════════════════════ */

/* ═══ UTILITY COPIES (from style.css — not loaded on this page) ═══ */
/* WPass 136: max-width:100% (not 100vw) — iOS visual viewport is narrower
   than 100vw when scrollbar gutters are visible; 100vw can leak horizontal scroll. */
html,body{overflow-x:hidden;max-width:100%}
.sec{min-height:100vh;min-height:100dvh;display:flex;flex-direction:column;justify-content:center;padding:80px 0;position:relative;overflow:hidden}
.dark-sec{background:var(--bg2)}
.sec-bg{position:absolute;inset:0;background-size:cover;background-position:center;z-index:0;opacity:.15;filter:blur(1px)}
.dark-overlay{position:absolute;inset:0;background:rgba(9,9,11,.88);z-index:1}
.stitle{font-size:clamp(16px,3.5vw,26px);text-align:center;margin-bottom:8px;letter-spacing:2px}
.ssub{text-align:center;color:rgba(255,255,255,.65);font-size:15px;margin-bottom:36px}
.anim-in{opacity:0;transform:translateY(30px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.anim-in.visible{opacity:1;transform:translateY(0)}

/* ═══ O1: HERO ═══ */
.ost-hero{text-align:center;min-height:100vh;min-height:100dvh;background:var(--bg);position:relative}
.ost-hero::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse at 50% 80%,rgba(185,28,28,.08) 0%,transparent 60%),radial-gradient(ellipse at 30% 20%,rgba(245,197,24,.04) 0%,transparent 50%);z-index:0}
.ost-hero .ctr{position:relative;z-index:2}
.ost-hero-label{font-family:var(--px);font-size:clamp(8px,1.4vw,11px);color:var(--gold);letter-spacing:5px;margin-bottom:20px;text-shadow:0 0 20px var(--gold-g)}
.ost-hero-title{font-family:var(--dp);font-size:clamp(40px,9vw,90px);letter-spacing:4px;color:var(--w);line-height:1.05;margin-bottom:12px}
.ost-hero-accent{color:var(--gold)}
.ost-hero-sub{font-size:clamp(14px,2vw,18px);color:var(--w2);max-width:600px;margin:0 auto 32px;line-height:1.7}
.ost-hero-stats{display:flex;gap:32px;justify-content:center;flex-wrap:wrap;margin-bottom:40px}
.ost-stat{text-align:center}
.ost-stat-num{font-family:var(--dp);font-size:clamp(28px,5vw,48px);color:var(--gold);display:block;text-shadow:0 0 24px var(--gold-g)}
.ost-stat-label{font-size:11px;color:var(--g);letter-spacing:2px;text-transform:uppercase}
.ost-scroll-cue{position:absolute;bottom:28px;left:50%;transform:translateX(-50%);text-align:center;z-index:3}
.ost-scroll-cue span{display:block;font-size:10px;color:var(--dg);letter-spacing:3px;margin-bottom:8px}
.ost-scroll-chevron{width:18px;height:18px;border-right:2px solid var(--dg);border-bottom:2px solid var(--dg);transform:rotate(45deg);margin:0 auto;animation:ost-bob 2s ease-in-out infinite}
@keyframes ost-bob{0%,100%{transform:rotate(45deg) translateY(0)}50%{transform:rotate(45deg) translateY(6px)}}

/* ═══ O2: INVENTORY GRID ═══ */
.ost-inventory{min-height:auto;padding:60px 0 40px;background:var(--bg)}
.ost-inv-title{font-family:var(--px);font-size:clamp(14px,3vw,22px);text-align:center;color:var(--gold);letter-spacing:3px;margin-bottom:6px}
.ost-inv-sub{text-align:center;color:var(--g);font-size:14px;margin-bottom:40px;letter-spacing:1px}

.ost-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;max-width:1000px;margin:0 auto}

.ost-pack{background:var(--bg2);border:2px solid var(--dg);border-radius:8px;padding:16px 12px;text-align:center;cursor:pointer;transition:all .3s var(--ease);position:relative;overflow:hidden}
.ost-pack::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 50% 0%,rgba(245,197,24,.03) 0%,transparent 70%);opacity:0;transition:opacity .3s var(--ease)}
.ost-pack:hover{transform:translateY(-3px);border-color:#4a4a54;box-shadow:0 8px 24px rgba(0,0,0,.4)}
.ost-pack:hover::before{opacity:1}
.ost-pack.active{border-color:var(--gold);box-shadow:0 0 20px var(--gold-g),0 8px 24px rgba(0,0,0,.5);transform:translateY(-3px)}
.ost-pack.active::after{content:'';position:absolute;inset:-2px;border:2px solid var(--gold);border-radius:8px;animation:ost-glow-pulse 2s ease-in-out infinite;pointer-events:none}
@keyframes ost-glow-pulse{0%,100%{box-shadow:0 0 12px var(--gold-g)}50%{box-shadow:0 0 24px var(--gold-g),0 0 40px rgba(245,197,24,.15)}}

.ost-pack-icon{width:64px;height:64px;margin:0 auto 10px;position:relative}
.ost-pack-icon img{width:100%;height:100%;object-fit:contain;image-rendering:pixelated;filter:drop-shadow(0 2px 6px rgba(0,0,0,.5))}
.ost-pack-icon .ost-icon-placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center;font-size:28px;color:var(--dg);background:rgba(42,42,50,.4);border-radius:8px}

.ost-pack-name{font-family:var(--px);font-size:clamp(9px,1.2vw,11px);color:var(--w);letter-spacing:1px;margin-bottom:4px;line-height:1.4}
.ost-pack-desc{font-size:11px;color:var(--g);line-height:1.3;min-height:28px}
.ost-pack.active .ost-pack-name{color:var(--gold)}

/* New pack badge */
/* WPass 136: raised from 6px to 9px (accessibility floor). */
.ost-pack-badge{position:absolute;top:6px;right:6px;font-family:var(--px);font-size:9px;color:var(--bg);background:var(--cherry);padding:2px 6px;border-radius:3px;letter-spacing:1px}

/* ═══ O3: TRACK PANEL ═══ */
.ost-tracks{min-height:auto;padding:0 0 60px;background:var(--bg);display:none}
.ost-tracks.visible{display:block;animation:ost-slide-in .4s var(--ease)}
@keyframes ost-slide-in{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}

.ost-track-header{display:flex;align-items:center;gap:20px;padding:24px 0 20px;border-bottom:1px solid var(--dg);margin-bottom:0}
.ost-track-header-icon{width:56px;height:56px;flex-shrink:0}
.ost-track-header-icon img{width:100%;height:100%;object-fit:contain;image-rendering:pixelated;filter:drop-shadow(0 2px 8px rgba(0,0,0,.5))}
.ost-track-header-info{flex:1}
.ost-track-header-name{font-family:var(--dp);font-size:clamp(24px,4vw,36px);color:var(--gold);letter-spacing:2px;line-height:1.1}
.ost-track-header-desc{font-size:13px;color:var(--g);margin-top:2px}
.ost-track-back{font-family:var(--px);font-size:8px;color:var(--g);background:none;border:1px solid var(--dg);padding:8px 16px;border-radius:4px;cursor:pointer;letter-spacing:2px;transition:all .3s var(--ease);flex-shrink:0;text-transform:uppercase}
.ost-track-back:hover{border-color:var(--gold);color:var(--gold)}

.ost-track-list{list-style:none;padding:0;margin:0}
.ost-track{display:flex;align-items:center;gap:16px;padding:14px 16px;border-bottom:1px solid rgba(245,197,24,.12);border-left:3px solid transparent;transition:background .2s var(--ease),border-color .2s var(--ease)}
.ost-track:nth-child(odd){background:linear-gradient(90deg,rgba(185,28,28,.06),rgba(185,28,28,.02) 60%,transparent)}
.ost-track:nth-child(even){background:linear-gradient(90deg,rgba(245,197,24,.05),rgba(245,197,24,.015) 60%,transparent)}
.ost-track:hover{background:linear-gradient(90deg,rgba(185,28,28,.14),rgba(245,197,24,.08));border-left-color:var(--gold)}
.ost-track.playing{background:linear-gradient(90deg,var(--cherry-g),var(--gold-g));border-left-color:var(--cherry);box-shadow:inset 0 0 24px rgba(185,28,28,.08)}
.ost-track.playing .ost-track-num{color:var(--gold);text-shadow:0 0 12px var(--gold-g)}
.ost-track.playing .ost-play-btn{background:var(--cherry);color:var(--w);box-shadow:0 0 16px var(--cherry-glow)}
.ost-track.playing .ost-track-name{color:var(--gold)}

.ost-track-num{font-family:var(--dp);font-size:18px;color:var(--gold-d);width:24px;text-align:center;flex-shrink:0}
.ost-play-btn{width:36px;height:36px;border-radius:50%;border:2px solid var(--cherry);background:none;color:var(--cherry);display:flex;align-items:center;justify-content:center;cursor:pointer;flex-shrink:0;transition:all .3s var(--ease);font-size:12px}
.ost-play-btn:hover:not(:disabled){background:var(--cherry);color:var(--w);transform:scale(1.1);box-shadow:0 0 16px var(--cherry-g)}
.ost-play-btn:disabled{border-color:var(--dg);color:var(--dg);cursor:not-allowed;opacity:.5}
.ost-play-btn:active:not(:disabled){transform:scale(.95)}

.ost-track-info{flex:1;min-width:0}
.ost-track-name{font-family:var(--dp);font-size:18px;color:var(--w);letter-spacing:1px}
.ost-track-ctx{font-size:11px;color:var(--g);margin-top:1px}

.ost-track-duration{font-family:var(--dp);font-size:14px;color:var(--cherry-l);flex-shrink:0;letter-spacing:1px}

/* ═══ O4: PLAYER BAR ═══ */
.ost-player{position:fixed;bottom:0;left:0;right:0;height:56px;background:rgba(9,9,11,.97);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-top:1px solid var(--dg);display:flex;align-items:center;padding:0 max(20px,env(safe-area-inset-right)) 0 max(20px,env(safe-area-inset-left));padding-bottom:env(safe-area-inset-bottom,0);gap:12px;z-index:999;transform:translateY(100%);transition:transform .3s var(--ease)}
.ost-player.visible{transform:translateY(0)}

.ost-player-play{width:40px;height:40px;border-radius:50%;border:2px solid var(--cherry);background:none;color:var(--cherry);display:flex;align-items:center;justify-content:center;cursor:pointer;flex-shrink:0;transition:all .3s var(--ease);font-size:14px}
.ost-player-play:hover{background:var(--cherry);color:var(--w);transform:scale(1.1)}
.ost-player-play:disabled{border-color:var(--dg);color:var(--dg);cursor:not-allowed}

.ost-player-info{flex:0 0 auto;min-width:0}
/* WPass 136: raised from 7px to 9px (accessibility floor). */
.ost-player-pack{font-family:var(--px);font-size:9px;color:var(--gold);letter-spacing:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ost-player-track{font-size:12px;color:var(--w2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

.ost-player-progress{flex:1;height:4px;background:var(--dg);border-radius:2px;overflow:hidden;cursor:pointer;min-width:80px}
.ost-player-progress-fill{height:100%;background:linear-gradient(90deg,var(--cherry),var(--gold));border-radius:2px;width:0%;transition:width .1s linear;box-shadow:0 0 12px var(--cherry-g)}

.ost-player-time{font-family:var(--dp);font-size:13px;color:var(--dg);flex-shrink:0;letter-spacing:1px;min-width:60px;text-align:center}

.ost-player-vol{display:flex;align-items:center;gap:6px;flex-shrink:0}
.ost-player-vol-icon{color:var(--g);font-size:14px}
.ost-player-vol-slider{width:60px;height:4px;-webkit-appearance:none;appearance:none;background:var(--dg);border-radius:2px;outline:none;cursor:pointer}
.ost-player-vol-slider:focus-visible{box-shadow:0 0 0 2px var(--gold)}
.ost-player-vol-slider::-webkit-slider-thumb{-webkit-appearance:none;width:12px;height:12px;border-radius:50%;background:var(--w);cursor:pointer;border:none}
.ost-player-vol-slider::-moz-range-thumb{width:12px;height:12px;border-radius:50%;background:var(--w);cursor:pointer;border:none}

.ost-player-placeholder{font-size:10px;color:var(--dg);font-style:italic;letter-spacing:1px;margin-left:auto}

/* ═══ PAGE BODY PADDING ═══ */
.ost-page{padding-bottom:56px}

/* ═══ HIDE REDUNDANT NAV OST BUTTON ON THIS PAGE ═══ */
.ost-page .cc-nav-ost-btn{display:none}

/* ═══ SECTION DIVIDER ═══ */
.ost-divider{width:60px;height:2px;background:var(--dg);margin:0 auto 40px;border-radius:1px}

/* ═══ RESPONSIVE: TABLET ═══ */
@media(max-width:768px){
  .ost-hero{min-height:80vh;min-height:80dvh}
  .ost-grid{grid-template-columns:repeat(3,1fr);gap:12px}
  .ost-pack{padding:12px 8px}
  .ost-pack-icon{width:48px;height:48px}
  .ost-pack-desc{font-size:10px;min-height:24px}
  .ost-track-header{flex-wrap:wrap;gap:12px}
  .ost-track-back{width:100%;text-align:center;order:3}
  .ost-player-placeholder{display:none}
  .ost-player-vol{display:none}
  .ost-player-time{display:none}
}

/* ═══ RESPONSIVE: MOBILE ═══ */
@media(max-width:480px){
  .ost-hero{min-height:70vh;min-height:70dvh}
  .ost-hero-stats{gap:20px}
  .ost-grid{grid-template-columns:repeat(2,1fr);gap:10px}
  .ost-pack{padding:10px 6px}
  .ost-pack-icon{width:40px;height:40px}
  .ost-pack-name{font-size:9px}
  .ost-pack-desc{display:none}
  .ost-track{gap:10px;padding:10px 8px}
  .ost-play-btn{width:32px;height:32px;font-size:10px}
  .ost-track-name{font-size:15px}
  .ost-track-num{display:none}
  .ost-player{height:50px;padding:0 12px;gap:8px}
  .ost-player-info{max-width:120px}
  .ost-inventory{padding:40px 0 30px}
}

/* ═══ REDUCED MOTION ═══ */
@media(prefers-reduced-motion:reduce){
  .ost-pack,.ost-play-btn,.ost-player-play,.ost-track,.ost-track-back{transition-duration:.01ms !important}
  .ost-scroll-chevron{animation:none}
  .ost-pack.active::after{animation:none}
  .ost-tracks.visible{animation:none}
}