@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=Space+Mono:wght@400;700&family=DM+Sans:wght@300;400;500&display=swap');

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

:root {
  --bg: #0a0a0c;
  --surface: #111115;
  --surface2: #18181f;
  --surface3: #1e1e28;
  --border: #252530;
  --border2: #32323f;
  --mel: #e8c547;
  --mel-dim: #6b5a1a;
  --chd: #47c5e8;
  --chd-dim: #1a5a6b;
  --text: #d8d6e8;
  --muted: #5a586a;
  --muted2: #3a3848;
  --font-display: 'Bebas Neue', sans-serif;
  --font-mono: 'Space Mono', monospace;
  --font-body: 'DM Sans', sans-serif;
}

html, body { height: 100%; background: var(--bg); color: var(--text); font-family: var(--font-body); }

.noise {
  position: fixed; inset: 0; pointer-events: none; z-index: 9999; opacity: 0.025;
  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)'/%3E%3C/svg%3E");
  background-size: 128px;
}

.app {
  max-width: 980px; margin: 0 auto; padding: 24px 20px 40px;
  min-height: 100vh; display: flex; flex-direction: column; gap: 16px;
}

/* HEADER */
.header {
  display: flex; align-items: center; justify-content: space-between;
  padding-bottom: 16px; border-bottom: 1px solid var(--border);
}
.logo-block { display: flex; align-items: center; gap: 14px; }
.logo-mark {
  width: 44px; height: 44px; border-radius: 10px;
  background: var(--mel); display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-size: 28px; color: #0a0a0c; line-height: 1;
  box-shadow: 0 0 24px rgba(232,197,71,0.25);
}
.logo-words { display: flex; flex-direction: column; line-height: 1; }
.logo-main { font-family: var(--font-display); font-size: 32px; color: var(--mel); letter-spacing: 0.04em; }
.logo-studio { font-family: var(--font-mono); font-size: 10px; color: var(--muted); letter-spacing: 0.2em; }
.logo-badge {
  font-family: var(--font-mono); font-size: 9px; color: var(--muted);
  border: 0.5px solid var(--border2); border-radius: 4px; padding: 3px 7px;
  letter-spacing: 0.08em;
}
.header-right { display: flex; align-items: center; gap: 12px; }
.status-bar {
  font-family: var(--font-mono); font-size: 10px; color: var(--mel);
  background: rgba(232,197,71,0.08); border: 0.5px solid rgba(232,197,71,0.2);
  border-radius: 4px; padding: 4px 10px; letter-spacing: 0.1em;
  transition: all 0.2s;
}
.status-bar.playing { color: var(--chd); background: rgba(71,197,232,0.08); border-color: rgba(71,197,232,0.2); }
.led-wrap { display: flex; align-items: center; }
.led {
  width: 8px; height: 8px; border-radius: 50%; background: var(--border2);
  transition: background 0.1s, box-shadow 0.1s;
}
.led.on { background: var(--mel); box-shadow: 0 0 8px var(--mel); }
.led.chd-on { background: var(--chd); box-shadow: 0 0 8px var(--chd); }
.mono { font-family: var(--font-mono); }

/* TRANSPORT */
.transport-bar {
  display: flex; align-items: center; gap: 16px;
  background: var(--surface); border: 0.5px solid var(--border);
  border-radius: 12px; padding: 14px 18px; flex-wrap: wrap;
}
.t-ctrl { display: flex; align-items: center; gap: 8px; }
.t-ctrl label { font-family: var(--font-mono); font-size: 9px; color: var(--muted); letter-spacing: 0.12em; white-space: nowrap; }
.t-ctrl input[type=range] { width: 100px; accent-color: var(--mel); }
.t-ctrl select {
  background: var(--surface2); border: 0.5px solid var(--border2);
  color: var(--text); border-radius: 6px; padding: 4px 8px;
  font-family: var(--font-mono); font-size: 11px; cursor: pointer; outline: none;
}
.t-ctrl .mono { font-size: 12px; color: var(--mel); min-width: 28px; }
.t-ctrl-narrow { gap: 6px; }
.t-buttons { display: flex; gap: 8px; margin-left: auto; }
.t-btn {
  font-family: var(--font-display); font-size: 16px; letter-spacing: 0.05em;
  background: transparent; border: 1px solid var(--border2);
  color: var(--text); border-radius: 8px; padding: 8px 20px; cursor: pointer;
  transition: all 0.15s;
}
.t-btn:hover { background: var(--surface2); border-color: var(--muted); }
.t-btn-play { border-color: var(--mel); color: var(--mel); }
.t-btn-play:hover { background: rgba(232,197,71,0.1); }
.t-btn-play.playing { background: var(--mel); color: #0a0a0c; box-shadow: 0 0 20px rgba(232,197,71,0.3); }

/* TRACKS */
.tracks-wrap { display: flex; flex-direction: column; gap: 14px; }
.track {
  background: var(--surface); border: 0.5px solid var(--border);
  border-radius: 14px; overflow: hidden; transition: border-color 0.2s;
}
.track-mel { border-left: 2px solid var(--mel-dim); }
.track-chd { border-left: 2px solid var(--chd-dim); }
.track-mel.track-active { border-left-color: var(--mel); }
.track-chd.track-active { border-left-color: var(--chd); }

.track-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px 10px; border-bottom: 0.5px solid var(--border);
}
.track-name { display: flex; align-items: baseline; gap: 8px; }
.t-label {
  font-family: var(--font-display); font-size: 22px; color: var(--mel); letter-spacing: 0.06em;
}
.chd-label { color: var(--chd); }
.t-sub { font-family: var(--font-mono); font-size: 9px; color: var(--muted); letter-spacing: 0.15em; }

/* TOGGLE */
.toggler { cursor: pointer; }
.toggler input { display: none; }
.tog-ui {
  display: block; width: 38px; height: 20px; background: var(--muted2);
  border-radius: 10px; position: relative; transition: background 0.2s;
}
.tog-ui::after {
  content: ''; position: absolute; width: 14px; height: 14px;
  background: var(--muted); border-radius: 50%; top: 3px; left: 3px; transition: all 0.2s;
}
.toggler input:checked + .tog-ui { background: rgba(232,197,71,0.25); }
.toggler input:checked + .tog-ui::after { background: var(--mel); transform: translateX(18px); }
.chd-tog.tog-ui {}
.toggler input:checked + .chd-tog { background: rgba(71,197,232,0.2); }
.toggler input:checked + .chd-tog::after { background: var(--chd); }

/* CTRL PANEL */
.ctrl-panel { display: flex; gap: 0; padding: 16px 18px; align-items: flex-start; }
.knobs { display: flex; gap: 20px; flex-shrink: 0; }

/* SVG KNOBS */
.knob-ctrl {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  cursor: pointer; user-select: none;
}
.knob-svg { width: 64px; height: 64px; }
.k-bg { fill: var(--surface2); stroke: var(--border2); stroke-width: 1.5; }
.k-arc { fill: none; stroke-width: 4; stroke-linecap: round; }
.mel-arc { stroke: var(--mel); }
.chd-arc { stroke: var(--chd); }
.k-val {
  font-family: var(--font-mono); font-size: 9px; fill: var(--text);
  text-anchor: middle; dominant-baseline: middle;
}
.k-label { font-family: var(--font-mono); font-size: 8px; color: var(--muted); letter-spacing: 0.1em; text-align: center; }
.hidden-range { display: none; }

/* SELECTS PANEL */
.selects-panel {
  display: flex; flex-wrap: wrap; gap: 12px; padding-left: 24px;
  border-left: 0.5px solid var(--border); margin-left: 20px; flex: 1;
  align-items: flex-start;
}
.sel-group { display: flex; flex-direction: column; gap: 5px; }
.sel-group label, .sel-group > label {
  font-family: var(--font-mono); font-size: 8px; color: var(--muted); letter-spacing: 0.12em;
}
.sel-group select, .selects-panel select {
  background: var(--surface2); border: 0.5px solid var(--border2);
  color: var(--text); border-radius: 6px; padding: 6px 10px;
  font-family: var(--font-body); font-size: 12px; cursor: pointer; outline: none;
  min-width: 140px;
}
.sel-group select:focus { border-color: var(--mel); }

.toggles { display: flex; flex-direction: column; gap: 8px; padding-top: 4px; }
.tog-row {
  display: flex; align-items: center; gap: 10px; cursor: pointer;
  font-family: var(--font-mono); font-size: 9px; color: var(--muted); letter-spacing: 0.1em;
}

.chord-intervals {
  display: flex; flex-direction: column; gap: 4px;
  font-family: var(--font-mono); font-size: 9px;
  padding: 8px 12px; background: var(--surface2);
  border: 0.5px solid var(--border2); border-radius: 6px;
  min-width: 160px;
}
.interval-label { color: var(--muted); letter-spacing: 0.1em; }
#interval-vals { color: var(--chd); font-size: 11px; }

/* SEQUENCER */
.seq-wrap { padding: 0 18px 10px; }
.seq-grid {
  display: flex; gap: 3px; flex-wrap: wrap; padding: 10px 0 4px;
}
.seq-step {
  height: 28px; border-radius: 4px; background: var(--surface2);
  border: 0.5px solid var(--border2); flex: 1; min-width: 18px;
  display: flex; align-items: flex-end; justify-content: center;
  padding-bottom: 2px; cursor: pointer; transition: all 0.08s; position: relative;
  overflow: hidden;
}
.seq-step .step-fill {
  position: absolute; bottom: 0; left: 0; right: 0;
  background: var(--mel); opacity: 0.45; border-radius: 3px; transition: height 0.1s;
}
.seq-step.chd-step .step-fill { background: var(--chd); }
.seq-step .step-note {
  font-family: var(--font-mono); font-size: 7px; color: var(--muted);
  position: relative; z-index: 1; white-space: nowrap;
}
.seq-step.active { border-color: var(--mel); box-shadow: 0 0 8px rgba(232,197,71,0.4); }
.seq-step.active .step-fill { opacity: 0.9; }
.seq-step.chd-step.active { border-color: var(--chd); box-shadow: 0 0 8px rgba(71,197,232,0.4); }

/* NOTE PILLS */
.note-pills {
  display: flex; flex-wrap: wrap; gap: 5px; padding: 6px 18px 14px;
  min-height: 36px;
}
.pill {
  font-family: var(--font-mono); font-size: 10px;
  padding: 3px 9px; border-radius: 4px;
  background: rgba(232,197,71,0.08); border: 0.5px solid rgba(232,197,71,0.25);
  color: var(--mel); letter-spacing: 0.05em;
}
.chd-pills .pill {
  background: rgba(71,197,232,0.08); border-color: rgba(71,197,232,0.25);
  color: var(--chd);
}
.pill.loading { opacity: 0.4; animation: blink 0.6s infinite; }

/* FOOTER */
.footer {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 10px; border-top: 0.5px solid var(--border);
  font-size: 10px; color: var(--muted); letter-spacing: 0.06em;
}

/* LOADING OVERLAY */
.loading-overlay {
  position: fixed; inset: 0; background: rgba(10,10,12,0.92);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 20px; z-index: 100;
}
.loading-overlay h2 { font-family: var(--font-display); font-size: 36px; color: var(--mel); letter-spacing: 0.06em; }
.loading-bar-wrap { width: 260px; height: 3px; background: var(--border2); border-radius: 2px; overflow: hidden; }
.loading-bar { height: 100%; background: var(--mel); border-radius: 2px; width: 0; transition: width 0.3s; }
.loading-msg { font-family: var(--font-mono); font-size: 11px; color: var(--muted); }

@keyframes blink { 0%,100%{opacity:0.4} 50%{opacity:1} }

/* NAVIGATION */
.logo-link { display: flex; align-items: center; gap: 14px; text-decoration: none; }
.nav-link {
  font-family: var(--font-mono); font-size: 10px; color: var(--muted);
  text-decoration: none; letter-spacing: 0.1em; padding: 6px 12px;
  border: 0.5px solid var(--border2); border-radius: 4px;
  transition: all 0.2s;
}
.nav-link:hover { color: var(--chd); border-color: var(--chd); }

/* LANDING PAGE */
.landing-page { justify-content: center; }
.landing-content {
  display: flex; flex-direction: column; gap: 40px;
  flex: 1; max-width: 900px; margin: 0 auto; padding: 40px 0;
}
.landing-hero { text-align: center; }
.hero-title {
  font-family: var(--font-display); font-size: 64px; color: var(--mel);
  letter-spacing: 0.08em; margin-bottom: 12px;
}
.hero-subtitle {
  font-family: var(--font-body); font-size: 16px; color: var(--muted);
  line-height: 1.6;
}
.module-cards { display: flex; gap: 24px; }
.module-card {
  flex: 1; background: var(--surface); border: 0.5px solid var(--border);
  border-radius: 16px; padding: 28px; text-decoration: none;
  display: flex; flex-direction: column; gap: 16px;
  transition: all 0.3s; position: relative; overflow: hidden;
}
.module-card::before {
  content: ''; position: absolute; inset: 0; opacity: 0;
  transition: opacity 0.3s; pointer-events: none;
}
.mel-card { border-left: 2px solid var(--mel-dim); }
.mel-card::before { background: linear-gradient(135deg, rgba(232,197,71,0.05), transparent); }
.mel-card:hover { border-left-color: var(--mel); transform: translateY(-4px); }
.mel-card:hover::before { opacity: 1; }
.chd-card { border-left: 2px solid var(--chd-dim); }
.chd-card::before { background: linear-gradient(135deg, rgba(71,197,232,0.05), transparent); }
.chd-card:hover { border-left-color: var(--chd); transform: translateY(-4px); }
.chd-card:hover::before { opacity: 1; }
.card-icon {
  font-size: 48px; line-height: 1; opacity: 0.4;
}
.mel-card .card-icon { color: var(--mel); }
.chd-card .card-icon { color: var(--chd); }
.card-content { flex: 1; position: relative; z-index: 1; }
.card-content h2 {
  font-family: var(--font-display); font-size: 28px; letter-spacing: 0.06em;
  margin-bottom: 8px;
}
.mel-card h2 { color: var(--mel); }
.chd-card h2 { color: var(--chd); }
.card-content p {
  font-size: 13px; color: var(--muted); line-height: 1.6; margin-bottom: 16px;
}
.card-features {
  list-style: none; display: flex; flex-direction: column; gap: 6px;
  font-family: var(--font-mono); font-size: 10px; color: var(--muted2);
}
.card-features li::before { content: '▸ '; color: var(--mel); margin-right: 8px; }
.chd-card .card-features li::before { color: var(--chd); }
.card-arrow {
  font-size: 32px; color: var(--muted2); text-align: right;
  transition: all 0.3s; position: relative; z-index: 1;
}
.module-card:hover .card-arrow { color: var(--mel); transform: translateX(8px); }
.chd-card:hover .card-arrow { color: var(--chd); }

/* PROGRESSION DISPLAY */
.progression-display {
  padding: 20px 18px; display: flex; flex-direction: column; gap: 16px;
}
.prog-bar {
  display: flex; gap: 8px; align-items: flex-start;
}
.prog-chord {
  background: var(--surface2); border: 0.5px solid var(--border2);
  border-radius: 8px; padding: 12px 16px; cursor: pointer;
  transition: all 0.2s; position: relative; overflow: hidden;
  border-left: 2px solid var(--chd-dim);
}
.prog-chord:hover { background: var(--surface3); border-left-color: var(--chd); }
.prog-chord.active {
  border-left-color: var(--chd); box-shadow: 0 0 12px rgba(71,197,232,0.3);
  background: rgba(71,197,232,0.08);
}
.prog-chord-name {
  font-family: var(--font-display); font-size: 24px; color: var(--chd);
  letter-spacing: 0.04em; margin-bottom: 4px;
}
.prog-chord-duration {
  font-family: var(--font-mono); font-size: 9px; color: var(--muted);
  letter-spacing: 0.1em;
}
.prog-chord-notes {
  font-family: var(--font-mono); font-size: 10px; color: var(--muted2);
  margin-top: 6px; display: flex; gap: 4px;
}

/* RESPONSIVE */
@media (max-width: 680px) {
  .ctrl-panel { flex-direction: column; }
  .selects-panel { border-left: none; padding-left: 0; margin-left: 0; border-top: 0.5px solid var(--border); padding-top: 14px; }
  .knobs { gap: 12px; }
  .knob-svg { width: 54px; height: 54px; }
  .t-buttons { width: 100%; }
  .t-btn { flex: 1; }
  .module-cards { flex-direction: column; }
  .hero-title { font-size: 48px; }
  .prog-bar { flex-wrap: wrap; }
}