/* ===================================================
   ZenWave Studio — Premium Dark Music Generator CSS
   =================================================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:         #070810;
  --bg-card:    rgba(255,255,255,0.035);
  --bg-hover:   rgba(255,255,255,0.07);
  --border:     rgba(255,255,255,0.07);
  --border-md:  rgba(255,255,255,0.14);
  --txt:        #f1f5f9;
  --txt-2:      #94a3b8;
  --txt-3:      #475569;
  --purple:     #a78bfa;
  --blue:       #38bdf8;
  --teal:       #2dd4bf;
  --green:      #4ade80;
  --amber:      #fbbf24;
  --orange:     #fb923c;
  --rose:       #fb7185;
  --indigo:     #818cf8;
  --r-card:     18px;
  --r-btn:      50px;
  --trans:      all 0.25s cubic-bezier(.4,0,.2,1);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--txt);
  min-height: 100vh;
  overflow-x: hidden;
}

/* BG Orbs */
.bg-orbs { position: fixed; inset: 0; pointer-events: none; z-index: 0; }
.orb { position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.18; animation: orbDrift 20s ease-in-out infinite alternate; }
.orb-1 { width: 500px; height: 500px; background: #7c3aed; top: -100px; left: -100px; animation-delay: 0s; }
.orb-2 { width: 400px; height: 400px; background: #0ea5e9; top: 40%; right: -150px; animation-delay: -7s; }
.orb-3 { width: 350px; height: 350px; background: #0d9488; bottom: -100px; left: 40%; animation-delay: -14s; }
@keyframes orbDrift {
  from { transform: translate(0,0) scale(1); }
  to   { transform: translate(40px, 30px) scale(1.1); }
}

/* Container */
.container { max-width: 1020px; margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }

/* HEADER */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(7,8,16,0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; gap: 12px; }
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-mark {
  width: 36px; height: 36px; border-radius: 10px;
  background: rgba(167,139,250,0.12);
  border: 1px solid rgba(167,139,250,0.25);
  display: flex; align-items: center; justify-content: center;
}
.logo-name {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700; font-size: 1.3rem;
  background: linear-gradient(135deg, var(--purple), var(--blue));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.logo-sub { font-size: 0.7rem; color: var(--txt-3); margin-left: 4px; font-weight: 500; text-transform: uppercase; letter-spacing: .08em; }
.header-center { display: flex; gap: 8px; flex: 1; justify-content: center; }
.header-author {
  display: flex; align-items: center; gap: 6px; flex-shrink: 0;
  background: rgba(167,139,250,0.08);
  border: 1px solid rgba(167,139,250,0.25);
  border-radius: 50px; padding: 6px 14px;
}
.author-by { font-size: 0.68rem; color: var(--txt-3); font-style: italic; }
.author-name {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.82rem; font-weight: 600;
  background: linear-gradient(135deg, var(--purple), var(--blue));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  white-space: nowrap;
}
.pill {
  font-size: 0.72rem; padding: 5px 12px; border-radius: 50px;
  background: rgba(255,255,255,0.05); border: 1px solid var(--border);
  color: var(--txt-2);
}
.pill-green { color: var(--green); border-color: rgba(74,222,128,0.25); background: rgba(74,222,128,0.07); }
.pill-green::before { content: ''; display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--green); margin-right: 6px; animation: blink 2s ease-in-out infinite; vertical-align: middle; }
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.3} }

/* MAIN */
.main { padding: 48px 0 80px; display: flex; flex-direction: column; gap: 36px; }

/* HERO */
.hero { text-align: center; padding: 8px 0 12px; }
.hero-badge {
  display: inline-block; font-size: 0.75rem; font-weight: 500;
  color: var(--purple); background: rgba(167,139,250,0.1);
  border: 1px solid rgba(167,139,250,0.2); border-radius: 50px;
  padding: 5px 14px; margin-bottom: 18px; letter-spacing: .04em;
}
.hero h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.8rem, 5vw, 3rem); font-weight: 700;
  line-height: 1.15; letter-spacing: -0.02em; margin-bottom: 14px;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(135deg, var(--purple), var(--blue) 50%, var(--teal));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-sub { font-size: 0.95rem; color: var(--txt-2); max-width: 500px; margin: 0 auto; line-height: 1.7; }

/* SECTION */
.section { display: flex; flex-direction: column; gap: 16px; }
.step-label {
  display: flex; align-items: center; gap: 10px;
  font-size: 0.78rem; font-weight: 600; letter-spacing: .08em;
  text-transform: uppercase; color: var(--txt-3);
}
.step-num {
  width: 22px; height: 22px; border-radius: 50%;
  background: linear-gradient(135deg, var(--purple), var(--blue));
  display: flex; align-items: center; justify-content: center;
  font-size: 0.68rem; font-weight: 700; color: white; flex-shrink: 0;
}

/* PRESET GRID */
.preset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 12px;
}

.preset-card {
  position: relative; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: var(--r-card);
  padding: 20px 18px 16px; cursor: pointer; text-align: left;
  overflow: hidden; transition: var(--trans); display: flex;
  flex-direction: column; gap: 6px;
}
.preset-card:hover { background: var(--bg-hover); border-color: var(--border-md); transform: translateY(-3px); box-shadow: 0 16px 48px rgba(0,0,0,0.5); }
.preset-card.active { border-color: var(--purple); background: rgba(167,139,250,0.07); box-shadow: 0 0 0 1px var(--purple), 0 16px 48px rgba(167,139,250,0.2); }

.preset-glow {
  position: absolute; top: -30px; right: -30px;
  width: 100px; height: 100px; border-radius: 50%;
  background: var(--c, var(--purple));
  filter: blur(35px); opacity: 0.25; transition: opacity .3s;
}
.preset-card:hover .preset-glow, .preset-card.active .preset-glow { opacity: 0.5; }

.preset-emoji { font-size: 2rem; line-height: 1; }
.preset-name { font-family: 'Space Grotesk', sans-serif; font-weight: 600; font-size: 0.95rem; }
.preset-desc { font-size: 0.75rem; color: var(--txt-2); line-height: 1.4; }
.preset-tags { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 4px; }
.preset-tags span {
  font-size: 0.65rem; padding: 2px 7px; border-radius: 50px;
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1);
  color: var(--txt-3);
}

/* SETTINGS */
.settings-section { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--r-card); padding: 24px; }
.settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.setting-group { display: flex; flex-direction: column; gap: 10px; }
.setting-label { font-size: 0.78rem; font-weight: 500; color: var(--txt-2); }

.btn-group { display: flex; gap: 6px; flex-wrap: wrap; }
.seg-btn {
  padding: 7px 14px; border-radius: 10px; border: 1px solid var(--border);
  background: rgba(255,255,255,0.04); color: var(--txt-2);
  font-size: 0.8rem; font-family: 'Inter', sans-serif; cursor: pointer;
  transition: var(--trans);
}
.seg-btn:hover { background: rgba(255,255,255,0.08); color: var(--txt); border-color: var(--border-md); }
.seg-btn.active { background: rgba(167,139,250,0.15); border-color: var(--purple); color: var(--purple); font-weight: 600; }

.bpm-wrap { display: flex; align-items: center; gap: 12px; }
.range-slider {
  -webkit-appearance: none; flex: 1; height: 4px; border-radius: 4px;
  background: rgba(255,255,255,0.1); outline: none; cursor: pointer; accent-color: var(--purple);
}
.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none; width: 16px; height: 16px; border-radius: 50%;
  background: var(--purple); box-shadow: 0 0 8px rgba(167,139,250,0.6); cursor: pointer;
}
.range-val { font-size: 0.78rem; color: var(--txt-2); min-width: 52px; text-align: right; }

/* GENERATE BUTTON */
.generate-section { align-items: center; }
.btn-generate {
  display: flex; align-items: center; gap: 12px;
  padding: 18px 48px; border-radius: var(--r-btn); border: none; cursor: pointer;
  background: linear-gradient(135deg, #7c3aed, #0ea5e9);
  color: white; font-size: 1.1rem; font-weight: 600;
  font-family: 'Space Grotesk', sans-serif; letter-spacing: .02em;
  transition: var(--trans); box-shadow: 0 8px 32px rgba(124,58,237,0.4);
  position: relative; overflow: hidden;
}
.btn-generate::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent);
  opacity: 0; transition: opacity .3s;
}
.btn-generate:hover:not(:disabled)::after { opacity: 1; }
.btn-generate:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 16px 48px rgba(124,58,237,0.6); }
.btn-generate:active:not(:disabled) { transform: scale(0.97); }
.btn-generate:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-generate-icon { font-size: 1.3rem; animation: spin 4s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.btn-generate:disabled .btn-generate-icon { animation: none; }

.generate-hint { font-size: 0.78rem; color: var(--txt-3); margin-top: -8px; }

/* PROGRESS */
.progress-wrap {
  width: 100%; max-width: 520px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--r-card); padding: 20px 24px; display: flex; flex-direction: column; gap: 12px;
}
.progress-info { display: flex; justify-content: space-between; font-size: 0.82rem; }
#progressLabel { color: var(--txt-2); }
#progressPct { color: var(--purple); font-weight: 600; }
.progress-bar-bg { height: 6px; background: rgba(255,255,255,0.08); border-radius: 6px; overflow: hidden; }
.progress-bar-fill {
  height: 100%; width: 0%; border-radius: 6px;
  background: linear-gradient(90deg, var(--purple), var(--blue));
  transition: width 0.4s ease;
  box-shadow: 0 0 10px rgba(167,139,250,0.5);
}
.progress-steps { display: flex; gap: 16px; justify-content: center; }
.pstep { font-size: 0.72rem; color: var(--txt-3); transition: color .3s; }
.pstep.active { color: var(--purple); font-weight: 600; }
.pstep.done { color: var(--green); }

/* OUTPUT / TRACK CARD */
.output-section { }
.track-card {
  background: var(--bg-card); border: 1px solid var(--border-md);
  border-radius: var(--r-card); padding: 24px; display: flex; flex-direction: column; gap: 18px;
}
.track-header { display: flex; align-items: center; gap: 14px; }
.track-emoji { font-size: 2.2rem; line-height: 1; }
.track-meta { flex: 1; }
.track-title { font-family: 'Space Grotesk', sans-serif; font-weight: 600; font-size: 1.05rem; margin-bottom: 3px; }
.track-info { font-size: 0.78rem; color: var(--txt-2); }
.track-badge {
  font-size: 0.62rem; font-weight: 700; letter-spacing: .12em;
  padding: 4px 10px; border-radius: 50px;
  background: rgba(74,222,128,0.1); border: 1px solid rgba(74,222,128,0.3);
  color: var(--green);
}

/* Waveform */
.waveform-wrap { position: relative; background: rgba(0,0,0,0.3); border-radius: 12px; overflow: hidden; }
.waveform-canvas { width: 100%; height: 80px; display: block; }
.waveform-playhead {
  position: absolute; top: 0; left: 0; width: 2px; height: 100%;
  background: var(--purple); opacity: 0; box-shadow: 0 0 8px var(--purple);
  pointer-events: none; transition: opacity .3s;
}
.waveform-playhead.visible { opacity: 1; }

/* Player Controls */
.player-controls { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }

.ctrl-btn {
  display: flex; align-items: center; gap: 6px;
  border-radius: 10px; border: 1px solid var(--border);
  background: rgba(255,255,255,0.05); color: var(--txt-2);
  padding: 8px 12px; cursor: pointer; font-size: 0.8rem;
  font-family: 'Inter', sans-serif; transition: var(--trans);
}
.ctrl-btn:hover { background: rgba(255,255,255,0.1); color: var(--txt); border-color: var(--border-md); }

.ctrl-play {
  width: 48px; height: 48px; border-radius: 50%;
  padding: 0; justify-content: center;
  background: linear-gradient(135deg, var(--purple), var(--blue));
  border: none; color: white;
  box-shadow: 0 4px 16px rgba(167,139,250,0.4);
}
.ctrl-play:hover { transform: scale(1.08); box-shadow: 0 6px 24px rgba(167,139,250,0.6); }

.ctrl-loop.active { border-color: var(--teal); color: var(--teal); background: rgba(45,212,191,0.1); }

.ctrl-download {
  margin-left: auto; border-color: rgba(74,222,128,0.3);
  color: var(--green); background: rgba(74,222,128,0.07);
}
.ctrl-download:hover { background: rgba(74,222,128,0.15); border-color: rgba(74,222,128,0.5); }

.ctrl-regen { color: var(--amber); border-color: rgba(251,191,36,0.25); background: rgba(251,191,36,0.07); }
.ctrl-regen:hover { background: rgba(251,191,36,0.15); }

/* Time & Seek */
.time-display { flex: 1; display: flex; align-items: center; gap: 10px; font-size: 0.75rem; color: var(--txt-3); min-width: 160px; }
.seek-bar-wrap { flex: 1; cursor: pointer; padding: 8px 0; }
.seek-bar-bg { height: 4px; background: rgba(255,255,255,0.1); border-radius: 4px; overflow: hidden; }
.seek-bar-fill { height: 100%; width: 0%; background: linear-gradient(90deg, var(--purple), var(--blue)); border-radius: 4px; transition: width .1s linear; }

/* HISTORY */
.history-section { }
.history-list { display: flex; flex-direction: column; gap: 10px; }
.history-item {
  display: flex; align-items: center; gap: 12px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 14px; padding: 14px 16px; cursor: pointer; transition: var(--trans);
}
.history-item:hover { background: var(--bg-hover); border-color: var(--border-md); }
.history-emoji { font-size: 1.4rem; }
.history-info { flex: 1; }
.history-name { font-size: 0.88rem; font-weight: 500; margin-bottom: 2px; }
.history-meta { font-size: 0.72rem; color: var(--txt-3); }
.history-dl {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 12px; border-radius: 8px; border: 1px solid var(--border);
  background: transparent; color: var(--txt-2); font-size: 0.75rem; cursor: pointer;
  transition: var(--trans); font-family: 'Inter', sans-serif;
}
.history-dl:hover { background: rgba(255,255,255,0.07); color: var(--txt); }

/* FOOTER */
.footer {
  position: relative; z-index: 1; text-align: center;
  padding: 28px 24px; font-size: 0.72rem; color: var(--txt-3);
  border-top: 1px solid var(--border); margin-top: 24px;
  display: flex; flex-direction: column; gap: 6px;
}
.footer-author {
  font-size: 0.78rem; color: var(--txt-2);
}
.footer-author strong {
  background: linear-gradient(135deg, var(--purple), var(--blue));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  font-weight: 700;
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .header-center { display: none; }
}
@media (max-width: 640px) {
  .preset-grid { grid-template-columns: 1fr 1fr; }
  .settings-grid { grid-template-columns: 1fr; }
  .preset-tags { display: none; }
  .btn-generate { padding: 15px 32px; font-size: 1rem; }
  .ctrl-download { margin-left: 0; }
  .player-controls { gap: 8px; }
  .author-name { font-size: 0.72rem; }
  .header-author { padding: 5px 10px; }
}
@media (max-width: 380px) {
  .preset-grid { grid-template-columns: 1fr; }
  .header-author { display: none; }
  .footer-author { display: none; }
}