/* BiChord — "Prova Odası" kimligi
   zemin: koyu ceviz | vurgu: altin perde-isareti + camyesili
   baslik: Fraunces | govde: Inter | teknik: IBM Plex Mono */

:root{
  --ink-deep:   #17120D;
  --ink-panel:  #221A12;
  --ink-panel-2:#2B2116;
  --ivory:      #F3E9D6;
  --ivory-dim:  #C9BCA3;
  --gold:       #E3A73F;
  --gold-dim:   #8A6A2E;
  --pine:       #4C7A6B;
  --pine-bright:#6FA792;
  --line:       #493A28;
  --shadow: 0 20px 60px -20px rgba(0,0,0,.6);
  --radius: 14px;
  --serif: "Fraunces", "Iowan Old Style", serif;
  --sans: "Inter", -apple-system, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:
    radial-gradient(1200px 600px at 15% -10%, rgba(227,167,63,.07), transparent 60%),
    radial-gradient(900px 500px at 100% 20%, rgba(76,122,107,.08), transparent 55%),
    var(--ink-deep);
  color:var(--ivory);
  font-family:var(--sans);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
@media (prefers-reduced-motion:reduce){
  *{ animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; }
}

a{ color:inherit; }
:focus-visible{ outline:2px solid var(--gold); outline-offset:3px; border-radius:4px; }

.wrap{ max-width:1120px; margin:0 auto; padding:0 28px; }

/* ---------- nav ---------- */
.nav{
  display:flex; align-items:center; justify-content:space-between;
  padding:26px 0;
}
.brand{ display:flex; align-items:center; gap:10px; font-family:var(--serif); font-size:22px; letter-spacing:.01em; text-decoration:none; }
.brand svg{ width:26px; height:26px; }
.brand b{ font-style:italic; font-weight:600; color:var(--gold); }
.nav-links{ display:flex; gap:28px; font-size:14px; color:var(--ivory-dim); }
.nav-links a{ text-decoration:none; transition:color .15s; }
.nav-links a:hover{ color:var(--gold); }
.lang-toggle{
  font-family:var(--mono); font-size:12px; letter-spacing:.06em;
  background:none; border:1px solid var(--line); color:var(--ivory-dim);
  padding:6px 12px; border-radius:999px; cursor:pointer; transition:.15s;
}
.lang-toggle:hover{ border-color:var(--gold); color:var(--gold); }

/* ---------- hero ---------- */
.hero{ padding:64px 0 40px; }
.eyebrow{
  font-family:var(--mono); font-size:12px; letter-spacing:.18em; text-transform:uppercase;
  color:var(--pine-bright); display:flex; align-items:center; gap:10px; margin-bottom:22px;
}
.eyebrow::before{ content:""; width:22px; height:1px; background:var(--pine-bright); display:inline-block; }

.headline{
  font-family:var(--serif); font-weight:600; font-size:clamp(38px,6vw,64px);
  line-height:1.04; letter-spacing:-.01em; margin:0 0 22px; max-width:15ch;
}
.headline em{ font-style:italic; color:var(--gold); font-weight:500; }

.sub{ font-size:18px; color:var(--ivory-dim); max-width:46ch; margin:0 0 40px; }

/* live mini-demo strip in hero */
.demo-strip{
  border:1px solid var(--line); background:var(--ink-panel);
  border-radius:var(--radius); padding:20px 22px; margin-bottom:44px;
  box-shadow:var(--shadow); overflow:hidden; position:relative;
}
.demo-strip .demo-label{ font-family:var(--mono); font-size:11px; color:var(--ivory-dim); letter-spacing:.1em; text-transform:uppercase; margin-bottom:14px; display:flex; justify-content:space-between; }
.demo-strip .demo-label .dot{ width:7px; height:7px; border-radius:50%; background:var(--pine-bright); display:inline-block; margin-right:6px; box-shadow:0 0 8px var(--pine-bright); }

/* ---------- upload card ---------- */
.upload-card{
  border:1px solid var(--line); background:linear-gradient(180deg, var(--ink-panel-2), var(--ink-panel));
  border-radius:var(--radius); padding:28px; box-shadow:var(--shadow);
}
.tabs{ display:flex; gap:4px; margin-bottom:18px; background:var(--ink-deep); padding:4px; border-radius:10px; width:fit-content; }
.tab-btn{
  font-family:var(--mono); font-size:13px; padding:8px 16px; border-radius:8px; border:none;
  background:transparent; color:var(--ivory-dim); cursor:pointer; transition:.15s;
}
.tab-btn.active{ background:var(--gold); color:var(--ink-deep); font-weight:600; }

.drop{
  border:1.5px dashed var(--line); border-radius:10px; padding:36px 20px; text-align:center;
  cursor:pointer; transition:.15s; background:rgba(0,0,0,.15);
}
.drop:hover, .drop.drag{ border-color:var(--gold); background:rgba(227,167,63,.05); }
.drop svg{ width:30px; height:30px; color:var(--gold-dim); margin-bottom:10px; }
.drop p{ margin:0; font-size:14px; color:var(--ivory-dim); }
.drop p b{ color:var(--ivory); }
.drop input[type=file]{ display:none; }

.link-row{ display:flex; gap:10px; }
.link-row input{
  flex:1; background:var(--ink-deep); border:1px solid var(--line); border-radius:8px;
  padding:14px 16px; color:var(--ivory); font-size:15px; font-family:var(--sans);
}
.link-row input::placeholder{ color:#5f5341; }
.link-row input:focus{ border-color:var(--gold); outline:none; }

.btn{
  font-family:var(--sans); font-weight:600; font-size:15px; border:none; border-radius:8px;
  padding:14px 22px; cursor:pointer; transition:.15s; display:inline-flex; align-items:center; gap:8px;
}
.btn-gold{ background:var(--gold); color:var(--ink-deep); }
.btn-gold:hover{ background:#eab654; transform:translateY(-1px); }
.btn-gold:disabled{ opacity:.5; cursor:not-allowed; transform:none; }
.btn-ghost{ background:transparent; border:1px solid var(--line); color:var(--ivory); }
.btn-ghost:hover{ border-color:var(--gold); color:var(--gold); }

.trust-line{ font-size:13px; color:var(--ivory-dim); margin-top:16px; font-family:var(--mono); }
.trust-line b{ color:var(--pine-bright); }

.hidden{ display:none !important; }

/* ---------- progress ---------- */
.progress-view{ text-align:center; padding:60px 0; }
.spinner{
  width:44px; height:44px; margin:0 auto 22px; border-radius:50%;
  border:3px solid var(--line); border-top-color:var(--gold);
  animation:spin 1s linear infinite;
}
@keyframes spin{ to{ transform:rotate(360deg); } }
.progress-step{ font-family:var(--mono); font-size:13px; color:var(--ivory-dim); letter-spacing:.05em; }

.error-box{
  border:1px solid #7a3b2e; background:rgba(122,59,46,.12); border-radius:10px;
  padding:16px 18px; color:#e8b7a8; font-size:14px; margin-top:16px;
}

/* ---------- result view ---------- */
.result{ padding:20px 0 90px; }
.song-bar{
  display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; gap:16px;
  border-bottom:1px solid var(--line); padding-bottom:20px; margin-bottom:28px;
}
.song-meta{ display:flex; gap:22px; font-family:var(--mono); font-size:13px; color:var(--ivory-dim); }
.song-meta span b{ color:var(--gold); font-weight:600; }

.mode-toggle{ display:flex; gap:4px; background:var(--ink-panel); padding:4px; border-radius:10px; border:1px solid var(--line); }
.mode-btn{
  font-family:var(--mono); font-size:12px; padding:8px 14px; border-radius:7px; border:none;
  background:transparent; color:var(--ivory-dim); cursor:pointer; transition:.15s;
}
.mode-btn.active{ background:var(--pine); color:var(--ivory); }

/* player */
.player{
  border:1px solid var(--line); background:var(--ink-panel); border-radius:var(--radius);
  padding:22px; margin-bottom:26px; box-shadow:var(--shadow);
}
.player audio, .player #yt-frame{ width:100%; border-radius:8px; }
#yt-frame{ aspect-ratio:16/9; border:none; }
.transport{ display:flex; align-items:center; gap:14px; margin-top:16px; }
.play-btn{
  width:44px; height:44px; border-radius:50%; background:var(--gold); border:none; cursor:pointer;
  display:flex; align-items:center; justify-content:center; flex-shrink:0; transition:.15s;
}
.play-btn:hover{ background:#eab654; }
.play-btn svg{ width:16px; height:16px; fill:var(--ink-deep); }
.scrub{
  flex:1; height:4px; background:var(--line); border-radius:2px; position:relative; cursor:pointer;
}
.scrub-fill{ position:absolute; left:0; top:0; height:100%; background:var(--gold); border-radius:2px; width:0%; }
.time-label{ font-family:var(--mono); font-size:12px; color:var(--ivory-dim); min-width:44px; text-align:right; }

/* chord timeline */
.timeline-wrap{
  border:1px solid var(--line); background:var(--ink-panel); border-radius:var(--radius);
  padding:26px 0; box-shadow:var(--shadow); position:relative; overflow:hidden;
}
.timeline-wrap::before{
  content:""; position:absolute; left:50%; top:0; bottom:0; width:2px; background:var(--gold);
  box-shadow:0 0 16px var(--gold); transform:translateX(-1px); z-index:2;
}
/* Akorlar zamana gore MUTLAK konumlaniyor: left = baslangic * pxPerSecond.
   Eskiden flex + gap + min-genislik kullaniliyordu; her akorda birkac piksel
   birikiyor ve sarki ilerledikce akorlar sesin onune geciyordu. */
.timeline-track{
  position:relative; height:104px; width:0; margin-left:50%;
  will-change:transform;
}
.chord-card{
  position:absolute; top:0; bottom:0; overflow:hidden;
  background:var(--ink-panel-2); border:1px solid var(--line);
  border-radius:10px; padding:12px 6px; text-align:center; transition:background .15s, border-color .15s;
}
.chord-card .name{ font-family:var(--mono); font-weight:700; font-size:15px; margin-bottom:8px; color:var(--ivory-dim); }
.chord-card.active{
  border-color:var(--gold); background:rgba(227,167,63,.09);
  box-shadow:0 0 22px -4px rgba(227,167,63,.5);
}
.chord-card.active .name{ color:var(--gold); }
.chord-card svg{ width:100%; height:auto; }
.chord-card.low-conf{ opacity:.62; }
.chord-card .conf-flag{ font-family:var(--mono); font-size:9px; color:var(--pine-bright); margin-top:4px; }

.legend{
  display:flex; gap:20px; justify-content:center; margin-top:18px;
  font-family:var(--mono); font-size:11px; color:var(--ivory-dim);
}
.legend span{ display:flex; align-items:center; gap:6px; }
.legend i{ width:8px; height:8px; border-radius:2px; display:inline-block; }

/* borrowed chord note */
.note-line{
  font-family:var(--mono); font-size:12px; color:var(--pine-bright); margin-top:14px; text-align:center;
}

/* export row */
.export-row{ display:flex; justify-content:center; gap:12px; margin-top:26px; }

/* footer */
.footer{
  border-top:1px solid var(--line); padding:40px 0; margin-top:60px;
  display:flex; flex-wrap:wrap; justify-content:space-between; gap:20px;
  font-size:13px; color:var(--ivory-dim);
}
.footer .brand{ font-size:16px; }

@media (max-width:640px){
  .nav-links{ display:none; }
  .song-bar{ flex-direction:column; align-items:flex-start; }
}

/* ---------- pratik kontrolleri ---------- */
.practice-row{
  display:flex; flex-wrap:wrap; align-items:center; gap:26px;
  margin-top:18px; padding-top:16px; border-top:1px solid var(--line);
}
.ctl-group{ display:flex; align-items:center; gap:10px; }
.ctl-label{ font-family:var(--mono); font-size:11px; letter-spacing:.12em; text-transform:uppercase; color:var(--ivory-dim); }
.speed-btns{ display:flex; gap:3px; background:var(--ink-deep); padding:3px; border-radius:8px; }
.speed-btn{
  font-family:var(--mono); font-size:12px; padding:6px 11px; border:none; border-radius:6px;
  background:transparent; color:var(--ivory-dim); cursor:pointer; transition:.15s;
}
.speed-btn.active{ background:var(--pine); color:var(--ivory); }
.speed-btn:hover:not(.active){ color:var(--gold); }

.loop-btn{
  font-family:var(--mono); font-size:12px; padding:8px 14px; border-radius:8px;
  border:1px solid var(--line); background:transparent; color:var(--ivory-dim); cursor:pointer; transition:.15s;
}
.loop-btn:hover{ border-color:var(--gold); color:var(--gold); }
.loop-btn.armed{ border-color:var(--gold); color:var(--gold); animation:pulse 1.2s ease-in-out infinite; }
.loop-btn.active{ background:var(--pine); border-color:var(--pine); color:var(--ivory); }
@keyframes pulse{ 50%{ opacity:.55; } }
.loop-label{ font-family:var(--mono); font-size:11px; color:var(--pine-bright); }
.kbd-hint{ font-family:var(--mono); font-size:11px; color:#5f5341; margin-left:auto; }

/* ---------- simdi calinan akor paneli ---------- */
.now-panel{
  display:flex; align-items:center; gap:28px;
  border:1px solid var(--line); background:var(--ink-panel);
  border-radius:var(--radius); padding:20px 26px; margin-bottom:20px;
  box-shadow:var(--shadow);
}
.now-label{ font-family:var(--mono); font-size:10px; letter-spacing:.16em; text-transform:uppercase; color:var(--ivory-dim); margin-bottom:4px; }
.now-main{ min-width:140px; }
.now-chord{ font-family:var(--mono); font-weight:700; font-size:44px; line-height:1; color:var(--gold); }
.now-bars{ font-family:var(--mono); font-size:12px; color:var(--pine-bright); margin-top:6px; }
.now-diagram{ width:96px; flex-shrink:0; }
.now-diagram svg{ width:100%; height:auto; }
.now-next{ margin-left:auto; text-align:right; }
.next-chord{ font-family:var(--mono); font-weight:500; font-size:26px; color:var(--ivory-dim); }

@media (max-width:640px){
  .practice-row{ gap:16px; }
  .kbd-hint{ display:none; }
  .now-panel{ gap:18px; padding:16px; }
  .now-chord{ font-size:34px; }
  .now-diagram{ width:70px; }
}