:root {
  --bg: #07080d;
  --panel: #11131c;
  --panel-2: #171a26;
  --border: #232634;
  --text: #e8eaf2;
  --muted: #8b90a6;
  --accent: #6366f1;
  --accent-2: #22d3ee;
  --radius: 14px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ---------- top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 22px;
  border-bottom: 1px solid var(--border);
  background: rgba(10, 12, 18, 0.7);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  width: 22px; height: 22px; border-radius: 7px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 18px rgba(99, 102, 241, 0.6);
}
.brand-name { font-weight: 700; letter-spacing: 0.3px; font-size: 17px; }

.nav { display: flex; gap: 6px; }
.nav-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--muted);
  padding: 8px 16px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}
.nav-btn:hover { color: var(--text); }
.nav-btn.active {
  color: var(--text);
  background: var(--panel-2);
  border-color: var(--border);
}

/* ---------- views ---------- */
.view { display: none; flex: 1; min-height: 0; flex-direction: column; }
.view.active { display: flex; }

/* ---------- studio stage ---------- */
.stage {
  position: relative;
  flex: 1;
  min-height: 340px;
  margin: 22px 22px 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #000;
}
#visualizer { position: absolute; inset: 0; display: block; width: 100%; height: 100%; }

.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 50% 40%, rgba(99,102,241,0.12), rgba(0,0,0,0.85));
  transition: opacity 0.3s ease;
}
.overlay.hidden { opacity: 0; pointer-events: none; }
.overlay-card {
  text-align: center;
  max-width: 460px;
  padding: 30px;
}
.overlay-card h1 { font-size: 30px; margin: 0 0 10px; }
.overlay-card p { color: var(--muted); margin: 0 0 22px; line-height: 1.5; }

.rec-badge {
  position: absolute;
  top: 14px; left: 14px;
  display: flex; align-items: center; gap: 8px;
  background: rgba(0,0,0,0.6);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 999px;
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  font-weight: 600;
}
.rec-dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: #ef4444;
  animation: pulse 1s infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.3; } }

/* ---------- controls ---------- */
.controls {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 20px 22px 26px;
}
.controls-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 28px;
}
.controls-selectors { align-items: flex-start; }
.controls-bottom { align-items: flex-end; justify-content: space-between; }
.control-group { display: flex; flex-direction: column; gap: 10px; }
.control-label { font-size: 12px; text-transform: uppercase; letter-spacing: 1px; color: var(--muted); }
.control-actions { flex-direction: row; align-items: flex-end; gap: 14px; }

.style-row { display: flex; flex-wrap: wrap; gap: 8px; }
.style-chip {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 7px 14px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  transition: all 0.15s ease;
}
.style-chip:hover { color: var(--text); transform: translateY(-1px); }
.style-chip.active {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
}

.skin-row { display: flex; flex-wrap: wrap; gap: 8px; }
.skin-chip {
  display: flex; align-items: center; gap: 8px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 7px 12px 7px 8px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  transition: border-color 0.15s ease, transform 0.1s ease;
}
.skin-chip:hover { transform: translateY(-1px); }
.skin-chip.active { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.skin-swatch {
  width: 18px; height: 18px; border-radius: 6px;
  background: linear-gradient(135deg, var(--c1), var(--c2), var(--c3));
}
.lock { font-size: 11px; opacity: 0.85; }

/* ---------- amplitude slider ---------- */
.amp-control { display: flex; align-items: center; gap: 12px; }
.amp-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 160px;
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(90deg,
    var(--accent-2) 0%, var(--accent-2) var(--fill, 50%),
    var(--border) var(--fill, 50%), var(--border) 100%);
  cursor: pointer;
  outline: none;
}
.amp-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--accent);
  box-shadow: 0 1px 4px rgba(0,0,0,0.45);
  cursor: pointer;
  transition: transform 0.1s ease;
}
.amp-slider::-webkit-slider-thumb:active { transform: scale(1.15); }
.amp-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--accent);
  box-shadow: 0 1px 4px rgba(0,0,0,0.45);
  cursor: pointer;
}
.amp-slider:focus-visible { box-shadow: 0 0 0 3px rgba(99,102,241,0.35); }
.amp-value {
  font-size: 13px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  min-width: 42px;
}

/* ---------- buttons ---------- */
.btn {
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  padding: 10px 18px;
  border-radius: 11px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: filter 0.15s ease, transform 0.1s ease;
}
.btn:hover { filter: brightness(1.15); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: none;
  color: #fff;
}
.btn-lg { padding: 14px 26px; font-size: 16px; }

.btn-record {
  display: flex; align-items: center; gap: 9px;
  background: var(--panel-2);
}
.record-icon {
  width: 12px; height: 12px; border-radius: 50%;
  background: #ef4444;
  transition: border-radius 0.2s ease;
}
.btn-record.is-recording { border-color: #ef4444; }
.btn-record.is-recording .record-icon { border-radius: 3px; }

.format-select { display: flex; flex-direction: column; gap: 6px; font-size: 12px; color: var(--muted); }
.format-select select {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 9px 12px;
  font-size: 14px;
  cursor: pointer;
}

.error-text { color: #f87171; font-size: 13px; margin-top: 14px; }

/* ---------- store ---------- */
.store-head { padding: 30px 26px 6px; }
.store-head h1 { margin: 0 0 6px; font-size: 28px; }
.store-head p { color: var(--muted); margin: 0; max-width: 620px; line-height: 1.5; }

.store-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 18px;
  padding: 22px 26px 40px;
}
.store-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.12s ease, border-color 0.15s ease;
}
.store-card:hover { transform: translateY(-2px); border-color: var(--accent); }
.store-preview {
  height: 130px;
  background: var(--bg, #000);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 16px;
  background: var(--bg);
}
.store-bars {
  width: 100%; height: 70%;
  border-radius: 8px;
  background:
    repeating-linear-gradient(90deg,
      transparent 0 6px,
      rgba(255,255,255,0.06) 6px 8px),
    linear-gradient(135deg, var(--c1), var(--c2), var(--c3));
  box-shadow: 0 0 26px -4px var(--c1);
  opacity: 0.92;
  -webkit-mask: repeating-linear-gradient(90deg, #000 0 7px, transparent 7px 12px);
          mask: repeating-linear-gradient(90deg, #000 0 7px, transparent 7px 12px);
}
.store-meta { padding: 14px 16px 16px; }
.store-title {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 12px;
  font-weight: 700;
}
.store-price {
  font-size: 13px;
  color: var(--accent-2);
  background: rgba(34, 211, 238, 0.12);
  padding: 3px 10px;
  border-radius: 999px;
}
.store-price.owned { color: #4ade80; background: rgba(74, 222, 128, 0.12); }
.store-meta .btn { width: 100%; }

/* ---------- toast ---------- */
.toast {
  position: fixed;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 12px 20px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 12px 40px rgba(0,0,0,0.5);
  z-index: 50;
}

/* ---- Fit shorter laptop screens (e.g. 13" MacBook Pro, ~720–800px tall) ---- */
@media (max-height: 860px) {
  .stage { min-height: 200px; margin-top: 16px; }
  .controls { padding: 14px 22px 18px; gap: 14px 20px; }
  .control-group { gap: 8px; }
  .overlay-card { padding: 22px; }
  .overlay-card h1 { font-size: 24px; }
  .overlay-card p { margin-bottom: 16px; }
}

/* ---- Narrow laptops / tablets ---- */
@media (max-width: 900px) {
  .controls { justify-content: flex-start; gap: 16px 22px; }
}

/* ---- Mobile ---- */
@media (max-width: 560px) {
  .topbar { padding: 12px 16px; }
  .stage { margin: 14px 14px 0; min-height: 46vh; }
  .controls { padding: 16px 14px 26px; gap: 16px; }
  .controls-bottom { flex-direction: column; align-items: stretch; gap: 16px; }
  .control-amp {
    flex-direction: row;
    align-items: center;
    gap: 14px;
  }
  .control-amp .control-label { flex-shrink: 0; }
  .amp-control { flex: 1; }
  .amp-slider { flex: 1; width: auto; }
  .control-actions { justify-content: space-between; align-items: center; }
  .btn-record { flex: 1; justify-content: center; }
  .format-select { min-width: 150px; }
}