/* ==========================================================
   Sonora Classic – Headphones Configurator (Design 3)
   Fonts are bundled (css/fonts.css) so the UI looks identical on every OS.
   ========================================================== */

:root{
  --bg:#faf7f2;
  --ink:#2b2520;
  --muted:#6d645a;
  --faint:#a79d90;
  --line:#ece5da;
  --line-strong:#ddd3c4;
  --soft:#f3eee6;
  --card:#ffffff;
  --gold:#c29b57;
  --cta:#e8c98f;
  --green:#3aa76d;
  --stage-a:#efe8dc;
  --stage-b:#e6ddcd;
  --shadow-sm:0 1px 2px rgba(43,37,32,.06),0 2px 8px rgba(43,37,32,.06);
  --shadow:0 1px 2px rgba(43,37,32,.06),0 8px 24px rgba(43,37,32,.08);
  --sans:"Sonora Sans",FreeSans,Helvetica,Arial,sans-serif;
  --serif:"Sonora Serif","DejaVu Serif",Georgia,serif;

  /* fluid sizes – choti screen par min, bari screen par max */
  --fs-nav:clamp(14px,.82vw,16px);
  --fs-h1:clamp(32px,2.15vw,44px);
  --fs-price:clamp(22px,1.45vw,30px);
  --fs-meta:clamp(14px,.82vw,16px);
  --fs-title:clamp(15px,.92vw,18px);
  --fs-sub:clamp(13px,.76vw,15px);
  --fs-sw:clamp(13px,.74vw,14.5px);
  --fs-small:clamp(12px,.68vw,13px);
  --side-w:clamp(400px,26vw,540px);
  --pad:clamp(24px,2.2vw,48px);
}

*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{font-family:var(--sans);font-size:15px;line-height:1.35;background:var(--bg);color:var(--ink);display:flex;flex-direction:column;min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
svg.fill{fill:currentColor;stroke:none}
svg.fill .st{stroke:currentColor;fill:none}
button:focus-visible,a:focus-visible{outline:2px solid var(--ink);outline-offset:2px}

/* ---------- Top nav ---------- */
.topnav{height:72px;flex:none;display:flex;align-items:center;padding:0 var(--pad);border-bottom:1px solid var(--line);gap:40px;font-size:var(--fs-nav);color:var(--muted);background:var(--bg)}
.topnav .logo{font-family:var(--serif);font-size:clamp(24px,1.45vw,30px);color:var(--ink);margin-right:16px;letter-spacing:-.2px}
.topnav .links{display:flex;gap:clamp(24px,2vw,40px)}
.topnav .links a{position:relative;padding:6px 0;transition:color .15s}
.topnav .links a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1.5px;background:var(--ink);transform:scaleX(0);transition:transform .2s}
.topnav .links a:hover{color:var(--ink)}
.topnav .links a:hover::after{transform:scaleX(1)}
.topnav .r{margin-left:auto;display:flex;gap:10px;align-items:center}
.nav-ic{display:flex;align-items:center;gap:4px;color:var(--muted);font-size:var(--fs-nav);height:40px;min-width:40px;padding:0 8px;border-radius:20px;justify-content:center;transition:background .15s,color .15s}
.nav-ic svg{width:19px;height:19px}
.nav-ic:hover{color:var(--ink);background:var(--soft)}
.nav-ic.liked svg{fill:#c0485a;stroke:#c0485a}
.nav-ic.bump{animation:bump .4s ease}
@keyframes bump{40%{transform:scale(1.2)}}

/* ---------- Layout ---------- */
main{flex:1;display:flex;padding:24px var(--pad) 28px;gap:clamp(24px,2vw,40px);height:calc(100vh - 72px);min-height:620px}

/* ---------- Stage ---------- */
.stage{flex:1;min-width:0;background:linear-gradient(160deg,var(--stage-a),var(--stage-b));border-radius:28px;position:relative;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-sm)}
.stage iframe{position:absolute;inset:0;width:100%;height:100%;border:0;background:transparent;display:block}
.stage:fullscreen{border-radius:0;border:0}

/* overlay controls – white + shadow so they read on a white 3D background too */
.badge,.ctl button,.views button,.zoom{background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm)}

.badge{position:absolute;top:22px;left:22px;border-radius:30px;padding:9px 16px;font-size:var(--fs-small);color:var(--muted);display:flex;gap:9px;align-items:center;z-index:2;pointer-events:none}
.badge i{width:8px;height:8px;border-radius:50%;background:var(--green);box-shadow:0 0 0 3px rgba(58,167,109,.18)}
.badge.loading i{background:#e0a33a;box-shadow:0 0 0 3px rgba(224,163,58,.2);animation:pulse 1s infinite}
@keyframes pulse{50%{opacity:.35}}

.ctl{position:absolute;top:22px;right:22px;display:flex;gap:10px;z-index:2}
.ctl button{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;color:var(--ink);transition:background .15s,color .15s,transform .15s,box-shadow .15s}
.ctl button:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
.ctl button.on{background:var(--ink);color:#fff;border-color:var(--ink)}

.views{position:absolute;left:22px;bottom:22px;display:flex;gap:10px;z-index:2}
.views button{overflow:hidden;width:88px;height:88px;border-radius:18px;display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:var(--fs-small);gap:6px;color:var(--muted);transition:border-color .15s,transform .15s,box-shadow .15s}
.views button:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
.views .th{width:64px;height:46px;display:flex;align-items:center;justify-content:center}
.views .th img{width:100%;height:100%;object-fit:contain;mix-blend-mode:multiply;display:block}
.views .ic{font-size:20px;line-height:1}
.views button.on{border:2px solid var(--ink);color:var(--ink);font-weight:700}

.zoom{position:absolute;right:22px;bottom:22px;border-radius:40px;display:flex;align-items:center;gap:12px;padding:7px;z-index:2}
.zoom button{width:38px;height:38px;border-radius:50%;background:var(--soft);display:grid;place-items:center;font-size:19px;line-height:1;transition:background .15s}
.zoom button:hover{background:var(--line)}
.zoom button:disabled{opacity:.4;cursor:default}
.zoom span{font-size:var(--fs-sub);min-width:50px;text-align:center;font-weight:700;font-variant-numeric:tabular-nums}

/* ---------- Side panel ---------- */
.side{width:var(--side-w);flex:none;display:flex;flex-direction:column;min-height:0}
.side h1{font-family:var(--serif);font-size:var(--fs-h1);font-weight:400;line-height:1.1;letter-spacing:-.3px}
.meta{display:flex;justify-content:space-between;align-items:flex-end;margin:10px 0 22px;color:var(--muted);font-size:var(--fs-meta)}
.meta span{padding-bottom:3px}
.meta b{color:var(--ink);font-size:var(--fs-price);line-height:1}
.prog{height:4px;background:var(--line);border-radius:4px;margin-bottom:20px;flex:none;overflow:hidden}
.prog i{display:block;height:100%;width:0;background:var(--ink);border-radius:4px;transition:width .35s ease}

#steps{flex:0 1 auto;min-height:0;overflow-y:auto;scrollbar-width:thin;padding:4px 10px 18px;margin:-4px -10px 4px}
.step{background:var(--card);border-radius:20px;margin-bottom:12px;border:1px solid var(--line);transition:box-shadow .2s,border-color .2s}
.step:hover{border-color:var(--line-strong)}
.step.open{box-shadow:var(--shadow);border-color:var(--line-strong)}
.sh{display:flex;align-items:center;gap:16px;padding:18px 20px;width:100%;text-align:left}
.num{width:34px;height:34px;flex:none;border-radius:50%;background:var(--soft);display:grid;place-items:center;font-size:14px;font-weight:700}
.num svg{width:15px;height:15px;stroke-width:2.6}
.step.done .num{background:var(--green);color:#fff}
.step.open .num{background:var(--ink);color:#fff}
.sh .t{font-weight:700;font-size:var(--fs-title)}
.sh .v{font-size:var(--fs-sub);color:var(--muted);margin-top:3px}
.sh .chip{margin-left:auto;width:30px;height:30px;flex:none;border-radius:50%;box-shadow:inset 0 0 0 1px rgba(0,0,0,.12),0 0 0 3px #fff,0 0 0 4px var(--line)}
.sh .ar{margin-left:14px;color:var(--faint);display:flex;align-items:center;font-size:var(--fs-sub);transition:color .15s}
.sh .ar.solo{margin-left:auto}
.sh .ar svg{width:18px;height:18px}
.step.done .sh:hover .ar{color:var(--ink)}

.body{padding:2px 20px 20px;animation:open .25s ease}
@keyframes open{from{opacity:0;transform:translateY(-4px)}}
.grp{font-size:var(--fs-small);color:var(--faint);letter-spacing:1.4px;font-weight:700;margin:2px 0 10px}
.sw + .grp{margin-top:18px}
.grp span{color:var(--gold);letter-spacing:.5px}
.sw{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.sw button{border:1.5px solid var(--line);border-radius:14px;padding:10px;display:flex;align-items:center;gap:10px;font-size:var(--fs-sw);text-align:left;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:border-color .15s,background .15s,transform .15s}
.sw button:hover{border-color:var(--line-strong);transform:translateY(-1px)}
.sw i{width:24px;height:24px;border-radius:50%;flex:none;box-shadow:inset 0 0 0 1px rgba(0,0,0,.12)}
.sw button.on{border-color:var(--ink);background:var(--bg);font-weight:700}
.nav2{display:flex;justify-content:space-between;align-items:center;margin-top:18px;font-size:var(--fs-sub)}
.nav2 button{color:var(--faint);padding:4px 0;transition:color .15s}
.nav2 button:hover{color:var(--ink)}
.nav2 button:disabled{visibility:hidden}
.nav2 .next{color:var(--ink);font-weight:700}

.total{margin-top:auto;flex:none;background:var(--ink);color:#fff;border-radius:20px;padding:20px 22px;display:flex;align-items:center;box-shadow:0 10px 30px rgba(43,37,32,.18)}
.total small{display:block;color:#b9ae9f;font-size:var(--fs-small);margin-bottom:3px}
.total b{font-size:var(--fs-price);line-height:1}
.total .go{margin-left:auto;background:var(--cta);color:var(--ink);padding:16px 28px;border-radius:14px;font-weight:700;font-size:var(--fs-title);transition:filter .15s,transform .15s}
.total .go:hover{filter:brightness(1.05);transform:translateY(-1px)}

.shake{animation:shake .4s ease}
@keyframes shake{20%,60%{transform:translateX(-5px)}40%,80%{transform:translateX(5px)}}

/* ---------- Toast ---------- */
.toast{position:fixed;left:50%;top:88px;transform:translate(-50%,-10px);background:var(--ink);color:#fff;padding:12px 20px;border-radius:30px;font-size:14px;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:150;box-shadow:var(--shadow)}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- Responsive ---------- */
/* narrow panel: swatch = dot upar, naam neeche (4 per row fit ho jate hain) */
@media (max-width:1599px){
  .sw{gap:8px}
  .sw button{flex-direction:column;justify-content:center;gap:6px;padding:10px 4px 8px;text-align:center;font-size:12.5px}
  .sw i{width:26px;height:26px}
}
/* short screens (laptops): thora compact */
@media (max-height:860px) and (min-width:981px){
  main{padding-top:18px;padding-bottom:20px}
  .side h1{font-size:30px}
  .meta{margin:6px 0 16px}
  .prog{margin-bottom:14px}
  .sh{padding:13px 18px}
  .num{width:30px;height:30px}
  .sh .chip{width:26px;height:26px}
  .step{margin-bottom:10px}
  .body{padding:0 18px 16px}
  .sw + .grp{margin-top:12px}
  .nav2{margin-top:12px}
  .total{padding:16px 18px}
  .total .go{padding:13px 22px}
  .views button{width:78px;height:78px}
}
@media (max-width:1180px){
  :root{--side-w:390px}
  main{padding:20px 24px 24px;gap:22px}
  .topnav{padding:0 24px}
}
@media (max-width:980px){
  :root{--side-w:100%}
  main{flex-direction:column;height:auto;min-height:0}
  .stage{flex:none;height:62vh;min-height:440px}
  #steps{overflow:visible;padding:0;margin:0}
  .total{margin-top:12px;position:sticky;bottom:12px;z-index:5}
}
@media (max-width:640px){
  .topnav{height:64px;padding:0 16px;gap:16px}
  .topnav .links{display:none}
  main{padding:14px 16px 16px}
  .stage{height:56vh;min-height:380px;border-radius:22px}
  .badge{top:14px;left:14px;padding:7px 12px}
  .badge .hint{display:none}
  .ctl{top:auto;bottom:112px;right:14px;flex-direction:column}
  .ctl button{width:40px;height:40px}
  .views{left:14px;bottom:14px;gap:8px}
  .views button{width:74px;height:74px;border-radius:14px}
  .views .th{width:54px;height:38px}
  .zoom{top:14px;right:14px;bottom:auto;padding:5px;gap:6px}
  .zoom button{width:32px;height:32px}
  .zoom span{min-width:42px}
  .sw{gap:6px}
  .sh{padding:16px}
  .body{padding:2px 16px 16px}
  .total{padding:14px 16px}
  .total .go{padding:13px 18px}
}

/* ---------- Loading: app:ready tak sirf 3D fullscreen, UI hidden ---------- */
.topnav,.side,.badge,.ctl,.views,.zoom{transition:opacity .45s ease,visibility .45s}
.ctl button,.views button{transition:opacity .45s ease,visibility .45s,border-color .15s,transform .15s,box-shadow .15s,background .15s}
body.app-loading{overflow:hidden}
body.app-loading .topnav,
body.app-loading .side,
body.app-loading .badge,
body.app-loading .ctl,
body.app-loading .views,
body.app-loading .zoom{opacity:0;visibility:hidden;pointer-events:none}
body.app-loading .stage{position:fixed;inset:0;z-index:100;width:auto;height:auto;min-height:0;border-radius:0;border:0;box-shadow:none}