/* ─────────────────────────────────────────
   AURUM — Suno AI Mastering Studio
   Estética: dark luxury · gold accents · studio precision
   Sin dependencias externas para funcionar en local
   ───────────────────────────────────────── */
:root {
  --gold:        #c9a84c;
  --gold-light:  #e2c47a;
  --gold-dim:    #7a6030;
  --bg-base:     #080808;
  --bg-card:     #0f0f0f;
  --bg-card2:    #141414;
  --bg-input:    #1a1a1a;
  --border:      rgba(201,168,76,0.15);
  --border-dim:  rgba(255,255,255,0.06);
  --text-hi:     #f0ead8;
  --text-mid:    #9a8f78;
  --text-lo:     #4a4540;
  --green:       #4caf7a;
  --red:         #c94c4c;
  --amber:       #c9944c;
  --radius:      4px;
  --radius-lg:   8px;
  --font-body:   'Georgia', 'Times New Roman', serif;
  --font-mono:   'Consolas', 'Courier New', monospace;
  --shadow:      0 8px 40px rgba(0,0,0,0.6);
  --glow:        0 0 30px rgba(201,168,76,0.08);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg-base);
  color: var(--text-hi);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

.grain {
  position: fixed; inset: 0; pointer-events: none; z-index: 999;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  opacity: 0.35;
}

.bg-orbs { position: fixed; inset: 0; pointer-events: none; z-index: 0; overflow: hidden; }
.orb {
  position: absolute; border-radius: 50%;
  filter: blur(80px); opacity: 0.12;
  animation: orb-drift 18s ease-in-out infinite alternate;
}
.orb-1 { width: 600px; height: 600px; background: radial-gradient(circle, #c9a84c, transparent 70%); top: -200px; right: -100px; animation-duration: 20s; }
.orb-2 { width: 400px; height: 400px; background: radial-gradient(circle, #4c7ac9, transparent 70%); bottom: 10%; left: -100px; animation-duration: 15s; animation-delay: -5s; }
.orb-3 { width: 300px; height: 300px; background: radial-gradient(circle, #c94c7a, transparent 70%); top: 40%; left: 40%; opacity: 0.06; animation-duration: 25s; animation-delay: -10s; }
@keyframes orb-drift { from { transform: translate(0,0) scale(1); } to { transform: translate(40px, 30px) scale(1.1); } }

.header {
  position: relative; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.5rem 2.5rem;
  border-bottom: 1px solid var(--border);
  background: rgba(8,8,8,0.8);
  backdrop-filter: blur(20px);
}
.logo { display: flex; align-items: baseline; gap: 0.6rem; flex-wrap: wrap; }
.logo-mark { color: var(--gold); font-size: 1.2rem; }
.logo-text { font-size: 1.8rem; font-weight: 300; letter-spacing: 0.25em; color: var(--text-hi); }
.logo-sub { font-family: var(--font-mono); font-size: 0.65rem; color: var(--text-mid); letter-spacing: 0.15em; text-transform: uppercase; margin-left: 0.2rem; }
.header-tag { font-family: var(--font-mono); font-size: 0.65rem; color: var(--gold-dim); letter-spacing: 0.1em; border: 1px solid var(--border); padding: 0.3rem 0.7rem; border-radius: var(--radius); }

.main {
  position: relative; z-index: 1;
  max-width: 1100px; margin: 0 auto;
  padding: 2.5rem 2rem 4rem;
  display: flex; flex-direction: column; gap: 2rem;
}

.drop-section { display: flex; flex-direction: column; gap: 1rem; }
.drop-zone {
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  padding: 3rem 2rem;
  display: flex; flex-direction: column; align-items: center; gap: 1.2rem;
  cursor: pointer; transition: border-color 0.3s, background 0.3s, box-shadow 0.3s;
}
.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--gold);
  background: rgba(201,168,76,0.04);
  box-shadow: var(--glow);
}
.drop-icon { color: var(--gold); width: 56px; height: 56px; opacity: 0.7; animation: float 3s ease-in-out infinite; }
@keyframes float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-6px)} }
.drop-icon svg { width: 100%; height: 100%; }
.drop-title { font-size: 1.25rem; font-weight: 300; color: var(--text-hi); text-align: center; }
.drop-hint { font-family: var(--font-mono); font-size: 0.65rem; color: var(--text-mid); letter-spacing: 0.12em; text-align: center; }
.btn-upload {
  display: inline-block; cursor: pointer;
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase;
  padding: 0.55rem 1.4rem;
  border: 1px solid var(--gold); color: var(--gold);
  border-radius: var(--radius); background: transparent;
  transition: background 0.2s, color 0.2s;
}
.btn-upload:hover { background: var(--gold); color: var(--bg-base); }
.file-info {
  display: flex; align-items: center; gap: 0.8rem;
  padding: 0.8rem 1.2rem;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.file-icon { color: var(--gold); font-size: 1rem; }
.file-name { font-weight: 400; color: var(--text-hi); flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-meta { font-family: var(--font-mono); font-size: 0.65rem; color: var(--text-mid); flex-shrink: 0; }
.btn-clear { background: none; border: none; color: var(--text-lo); cursor: pointer; font-size: 0.8rem; padding: 0.2rem 0.4rem; border-radius: 2px; transition: color 0.2s; }
.btn-clear:hover { color: var(--red); }

.waveform-section {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 1.5rem;
  display: flex; flex-direction: column; gap: 1rem;
}
.waveform-header { display: flex; align-items: center; justify-content: space-between; }
.section-label { font-family: var(--font-mono); font-size: 0.65rem; color: var(--text-mid); letter-spacing: 0.12em; text-transform: uppercase; }
.waveform-toggles { display: flex; gap: 0.4rem; }
.toggle-btn {
  font-family: var(--font-mono); font-size: 0.65rem; letter-spacing: 0.08em;
  padding: 0.3rem 0.8rem; border-radius: var(--radius);
  border: 1px solid var(--border-dim); background: transparent;
  color: var(--text-lo); cursor: pointer; transition: all 0.2s;
}
.toggle-btn:disabled { opacity: 0.3; cursor: default; }
.toggle-btn.active { border-color: var(--gold); color: var(--gold); background: rgba(201,168,76,0.08); }
.wave-canvas { width: 100%; height: 100px; border-radius: var(--radius); background: var(--bg-base); display: block; }
.playhead-bar { display: flex; align-items: center; gap: 0.8rem; }
.time-display { font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-mid); width: 36px; flex-shrink: 0; }
.progress-track {
  flex: 1; height: 3px; background: var(--bg-input);
  border-radius: 2px; position: relative; cursor: pointer;
}
.progress-fill { height: 100%; background: linear-gradient(90deg, var(--gold-dim), var(--gold)); border-radius: 2px; width: 0%; transition: width 0.1s; }
.progress-thumb {
  position: absolute; top: 50%; transform: translate(-50%,-50%);
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--gold); left: 0%; transition: left 0.1s;
  box-shadow: 0 0 6px rgba(201,168,76,0.5);
}
.transport { display: flex; align-items: center; gap: 0.6rem; }
.transport-btn {
  background: var(--bg-input); border: 1px solid var(--border-dim);
  color: var(--text-mid); border-radius: var(--radius);
  width: 36px; height: 36px; cursor: pointer; font-size: 0.75rem;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.2s;
}
.transport-btn:hover { border-color: var(--gold); color: var(--gold); }
.play-btn { width: 44px; height: 44px; font-size: 0.9rem; border-color: var(--gold); color: var(--gold); }
.play-btn:hover, .play-btn.playing { background: var(--gold); color: var(--bg-base); }
.volume-group { display: flex; align-items: center; gap: 0.5rem; margin-left: auto; }
.vol-icon { color: var(--text-mid); font-size: 0.8rem; }
.vol-slider { -webkit-appearance: none; appearance: none; width: 80px; height: 3px; background: var(--bg-input); border-radius: 2px; outline: none; cursor: pointer; }
.vol-slider::-webkit-slider-thumb { -webkit-appearance: none; width: 11px; height: 11px; border-radius: 50%; background: var(--gold); cursor: pointer; }
.spectrum-canvas { width: 100%; height: 60px; background: var(--bg-base); border-radius: var(--radius); display: block; }
.spectrum-labels { display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: 0.58rem; color: var(--text-lo); padding: 0 2px; }

.chain-section { display: flex; flex-direction: column; gap: 1.5rem; }
.chain-header { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; }
.chain-title { font-size: 1.6rem; font-weight: 300; letter-spacing: 0.05em; color: var(--text-hi); }
.chain-actions { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.btn-preset {
  font-family: var(--font-mono); font-size: 0.62rem; letter-spacing: 0.08em;
  padding: 0.3rem 0.8rem; border-radius: var(--radius);
  border: 1px solid var(--border-dim); background: transparent;
  color: var(--text-mid); cursor: pointer; transition: all 0.2s;
}
.btn-preset:hover { border-color: var(--gold); color: var(--gold); }
.btn-preset.active { border-color: var(--gold); color: var(--bg-base); background: var(--gold); }

.modules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1rem;
}
.module {
  background: var(--bg-card); border: 1px solid var(--border-dim);
  border-radius: var(--radius-lg); padding: 1.25rem;
  transition: border-color 0.3s, box-shadow 0.3s;
  display: flex; flex-direction: column; gap: 1rem;
}
.module:hover { border-color: var(--border); box-shadow: var(--shadow); }
.module.disabled { opacity: 0.48; }
.module-header { display: flex; align-items: flex-start; gap: 0.8rem; }
.module-id { font-family: var(--font-mono); font-size: 0.6rem; color: var(--gold-dim); letter-spacing: 0.1em; padding-top: 0.25rem; flex-shrink: 0; }
.module-info { flex: 1; }
.module-info h3 { font-size: 1rem; font-weight: 400; color: var(--text-hi); margin-bottom: 0.1rem; }
.module-info p { font-family: var(--font-mono); font-size: 0.6rem; color: var(--text-mid); letter-spacing: 0.05em; }

.toggle-switch { position: relative; display: inline-block; width: 36px; height: 20px; flex-shrink: 0; }
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute; cursor: pointer; inset: 0;
  background: var(--bg-input); border: 1px solid var(--border-dim);
  border-radius: 20px; transition: 0.3s;
}
.toggle-slider::before {
  content: ''; position: absolute;
  width: 12px; height: 12px; left: 3px; bottom: 3px;
  background: var(--text-lo); border-radius: 50%; transition: 0.3s;
}
.toggle-switch input:checked + .toggle-slider { background: rgba(201,168,76,0.2); border-color: var(--gold); }
.toggle-switch input:checked + .toggle-slider::before { transform: translateX(16px); background: var(--gold); }

.module-controls { display: flex; flex-direction: column; gap: 0.65rem; }
.control-row { display: grid; grid-template-columns: 1fr auto auto; align-items: center; gap: 0.6rem; }
.control-row label {
  font-family: var(--font-mono); font-size: 0.62rem;
  color: var(--text-mid); letter-spacing: 0.04em; white-space: nowrap;
}
.label-check { display: flex; align-items: center; gap: 0.5rem; grid-column: 1 / -1; }
.label-check input[type="checkbox"] { accent-color: var(--gold); width: 14px; height: 14px; cursor: pointer; }
input[type="range"] {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 3px; background: var(--bg-input);
  border-radius: 2px; outline: none; cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 13px; height: 13px;
  border-radius: 50%; background: var(--gold); cursor: pointer;
  box-shadow: 0 0 4px rgba(201,168,76,0.4);
  transition: transform 0.15s;
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.2); }
input[type="range"]::-moz-range-thumb { width: 13px; height: 13px; border-radius: 50%; background: var(--gold); cursor: pointer; border: none; }
.val-display {
  font-family: var(--font-mono); font-size: 0.62rem;
  color: var(--gold); text-align: right; white-space: nowrap;
  min-width: 76px;
}
.eq-canvas { width: 100%; height: 60px; background: var(--bg-base); border-radius: var(--radius); display: block; margin-top: 0.25rem; }

.meters { display: flex; flex-direction: column; gap: 0.5rem; }
.meter-group { display: grid; grid-template-columns: 52px 1fr 52px; align-items: center; gap: 0.6rem; }
.meter-label { font-family: var(--font-mono); font-size: 0.58rem; color: var(--text-mid); letter-spacing: 0.06em; }
.meter-bar-wrap { background: var(--bg-input); border-radius: 2px; height: 6px; overflow: hidden; }
.meter-bar { height: 100%; width: 0%; border-radius: 2px; background: linear-gradient(90deg, var(--green), var(--amber), var(--red)); transition: width 0.1s; }
.meter-val { font-family: var(--font-mono); font-size: 0.62rem; color: var(--gold); text-align: right; }

.export-section { display: flex; flex-direction: column; gap: 2rem; }
.process-area { display: flex; flex-direction: column; align-items: center; gap: 1.5rem; }
.btn-process {
  display: flex; align-items: center; gap: 0.8rem;
  font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.15em; text-transform: uppercase;
  padding: 1rem 3rem;
  background: transparent; border: 1px solid var(--gold);
  color: var(--gold); border-radius: var(--radius);
  cursor: pointer; transition: all 0.3s;
  position: relative; overflow: hidden;
}
.btn-process::before {
  content: ''; position: absolute; inset: 0;
  background: var(--gold); transform: scaleX(0); transform-origin: left;
  transition: transform 0.4s ease; z-index: 0;
}
.btn-process:hover::before { transform: scaleX(1); }
.btn-process:hover { color: var(--bg-base); }
.btn-process:hover .btn-process-icon { color: var(--bg-base); }
.btn-process-icon, .btn-process span { position: relative; z-index: 1; }
.btn-process-icon { font-size: 1rem; animation: spin-slow 4s linear infinite; }
@keyframes spin-slow { from{transform:rotate(0deg)} to{transform:rotate(360deg)} }
.btn-process:disabled { opacity: 0.4; cursor: not-allowed; pointer-events: none; }
.btn-process.processing { border-color: var(--amber); color: var(--amber); pointer-events: none; }

.progress-area { width: 100%; max-width: 500px; display: flex; flex-direction: column; align-items: center; gap: 0.8rem; }
.progress-steps { display: flex; gap: 0.4rem; flex-wrap: wrap; justify-content: center; }
.progress-step {
  font-family: var(--font-mono); font-size: 0.58rem; letter-spacing: 0.06em;
  padding: 0.2rem 0.5rem; border-radius: 2px;
  border: 1px solid var(--border-dim); color: var(--text-lo);
  transition: all 0.3s;
}
.progress-step.active { border-color: var(--gold); color: var(--gold); background: rgba(201,168,76,0.1); }
.progress-step.done { border-color: var(--green); color: var(--green); background: rgba(76,175,122,0.08); }
.progress-outer { width: 100%; height: 2px; background: var(--bg-input); border-radius: 2px; overflow: hidden; }
.progress-inner { height: 100%; background: linear-gradient(90deg, var(--gold-dim), var(--gold)); width: 0%; transition: width 0.4s ease; border-radius: 2px; }
.progress-msg { font-family: var(--font-mono); font-size: 0.65rem; color: var(--text-mid); letter-spacing: 0.06em; }

.export-area {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 1.5rem;
  display: flex; flex-direction: column; gap: 1.2rem;
  animation: fade-in 0.5s ease;
}
@keyframes fade-in { from{opacity:0;transform:translateY(10px)} to{opacity:1;transform:translateY(0)} }
.export-header { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.export-header h3 { font-size: 1.2rem; font-weight: 300; color: var(--text-hi); letter-spacing: 0.05em; }
.export-stats { font-family: var(--font-mono); font-size: 0.62rem; color: var(--text-mid); display: flex; gap: 1rem; flex-wrap: wrap; }
.export-formats { display: flex; gap: 0.6rem; flex-wrap: wrap; }
.format-card {
  display: flex; flex-direction: column; gap: 0.15rem;
  padding: 0.7rem 1rem; border-radius: var(--radius);
  border: 1px solid var(--border-dim); cursor: pointer;
  transition: all 0.2s;
}
.format-card:hover { border-color: var(--border); }
.format-card.active { border-color: var(--gold); background: rgba(201,168,76,0.06); }
.format-name { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-hi); font-weight: 500; }
.format-desc { font-family: var(--font-mono); font-size: 0.58rem; color: var(--text-mid); }
.btn-download {
  display: block; width: 100%; text-align: center;
  font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.12em; text-transform: uppercase;
  padding: 0.9rem; background: var(--gold); color: var(--bg-base);
  border: none; border-radius: var(--radius); cursor: pointer;
  transition: all 0.2s; font-weight: 500;
}
.btn-download:hover { background: var(--gold-light); box-shadow: 0 4px 20px rgba(201,168,76,0.3); }
.btn-download:disabled { opacity: 0.4; cursor: not-allowed; }

.footer {
  position: relative; z-index: 1;
  text-align: center;
  padding: 1.5rem 2rem;
  border-top: 1px solid var(--border-dim);
  font-family: var(--font-mono); font-size: 0.6rem;
  color: var(--text-lo); letter-spacing: 0.08em;
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--gold-dim); }

@media (max-width: 700px) {
  .header { padding: 1rem 1.2rem; }
  .header-tag { display: none; }
  .main { padding: 1.5rem 1rem 3rem; }
  .modules-grid { grid-template-columns: 1fr; }
  .chain-header { flex-direction: column; align-items: flex-start; }
  .export-formats { flex-direction: column; }
  .format-card { flex-direction: row; justify-content: space-between; }
  .control-row { grid-template-columns: 1fr; }
  .val-display { min-width: 0; text-align: left; }
}

/* ── Añadidos v3.1 ── */
.waveform-toggles { align-items: center; }
.match-label { font-family: var(--font-mono); font-size: 0.62rem; color: var(--text-mid); display: flex; align-items: center; gap: 0.4rem; margin-left: 0.6rem; cursor: pointer; }
.match-label input { accent-color: var(--gold); }
.wave-canvas { cursor: pointer; }
.btn-io { border-style: dashed; }
.platform-row { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.btn-platform { font-family: var(--font-mono); font-size: 0.58rem; letter-spacing: 0.05em; padding: 0.25rem 0.55rem; border-radius: var(--radius); border: 1px solid var(--border-dim); background: transparent; color: var(--text-mid); cursor: pointer; transition: all 0.2s; }
.btn-platform:hover, .btn-platform:focus-visible { border-color: var(--gold); color: var(--gold); outline: none; }
.format-card.disabled { opacity: 0.4; cursor: not-allowed; }