:root {
  --bg: #0f1116;
  --panel: #161a22;
  --accent: #34d399;
  --accent-2: #60a5fa;
  --text: #e5e7eb;
  --muted: #9aa3af;
  --border: #232837;

  /* ad sizes */
  --ad-top-h: 90px;    /* reserved height for top banner on desktop */
  --ad-rail-w: 300px;  /* typical 300x250/600 */
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  display: flex; flex-direction: column;
}

/* Layout */
.site-header { padding: 16px 12px; border-bottom: 1px solid var(--border); }
.header-inner { max-width: 1200px; margin: 0 auto; }
h1 { margin: 0 0 6px; font-size: 22px; }
.sub { margin: 0; color: var(--muted); }

.layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 12px;
}
@media (min-width: 1024px) {
  .layout {
    grid-template-columns: minmax(0, 1fr) var(--ad-rail-w);
    align-items: start;
  }
}

.content-col { min-width: 0; }
.rail-col { display: none; }
@media (min-width: 1024px) {
  .rail-col { display: block; }
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
  box-shadow: 0 8px 24px rgba(0,0,0,.3);
}

.rail-panel h3 { margin: 0 0 8px; }
.rail-list { margin: 0 0 12px 16px; color: var(--muted); }

.file-row {
  display: grid;
  grid-template-columns: auto 50px 1fr auto;
  gap: 12px;
  align-items: center;
}
.file-btn {
  background: linear-gradient(180deg, #1f2937, #111827);
  color: white; padding: 10px 14px; border-radius: 10px;
  border: 1px solid var(--border); cursor: pointer; display: inline-block;
}
.file-btn:hover { outline: 2px solid #2f3949; }
.or { text-align: center; color: var(--muted); }
.drop {
  border: 2px dashed #2a3345; border-radius: 12px; padding: 10px;
  text-align: center; color: var(--muted);
}
.drop.dragover { border-color: var(--accent); color: var(--accent); }
.filename { justify-self: end; color: var(--muted); font-style: italic; }

.wave { height: 140px; margin: 8px 0 6px; border-radius: 10px; overflow: hidden; }
.ws-region { background: rgba(96,165,250,0.2) !important; border: 1px dashed rgba(96,165,250,0.6) }

.controls, .loop-controls {
  display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 8px;
}
.controls > * { margin-right: 8px; }

button {
  border: 1px solid var(--border); background: #1d2430; color: var(--text);
  padding: 8px 12px; border-radius: 10px; cursor: pointer;
}
button:hover:not([disabled]) { border-color: #2b3546; background: #202736; }
button[disabled] { opacity: .5; cursor: not-allowed; }

.ctrl-group { display: inline-flex; align-items: center; gap: 8px; }
#speed { width: 220px; }
#speedVal { color: var(--accent); min-width: 48px; display: inline-block; text-align: right; }

.checkbox { display: inline-flex; gap: 8px; align-items: center; color: var(--muted); }

.time-readout { display: inline-flex; gap: 14px; color: var(--muted); margin-left: auto; }
.time-readout span { color: var(--text); }

kbd {
  background: #111827; padding: 2px 6px; border-radius: 6px; border: 1px solid var(--border);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 12px; color: var(--text);
}
.hint { color: var(--muted); margin: 8px 0 0; }

.site-footer { text-align: center; padding: 16px 12px; border-top: 1px solid var(--border); }
.site-footer small { color: var(--muted); }

/* Ad slots: reserve space to avoid CLS */
.ad-slot {
  background: #0d1117;
  border: 1px dashed #263042;
  border-radius: 10px;
  color: #5e6a82;
  display: block;
  position: relative;
  overflow: hidden;
}
.ad-slot::after {
  content: "Ad";
  position: absolute; top: 8px; right: 10px;
  font-size: 11px; color: #3c465c;
}
.ad-top { height: var(--ad-top-h); margin-top: 10px; }
@media (max-width: 640px) {
  .ad-top { height: 60px; } /* smaller mobile banner */
}
.ad-inline { height: 280px; margin-top: 12px; } /* room for in-article/rectangle */
.ad-rail { width: 100%; min-height: 250px; margin-top: 12px; }

/* Support box */
.support { margin-top: 12px; padding: 10px; background: #131a25; border: 1px solid var(--border); border-radius: 10px; }
.support-title { color: var(--muted); margin-bottom: 8px; }
.support-btn { display: inline-block; padding: 8px 12px; border: 1px solid var(--border); border-radius: 10px; color: var(--text); text-decoration: none; }
.support-btn:hover { background: #202736; }

/* Consent banner */
.consent.hidden { display: none; }
.consent {
  position: fixed; inset: 0; background: rgba(0,0,0,.55);
  display: grid; place-items: end center; padding: 12px;
  z-index: 9999;
}
.consent-box {
  width: min(680px, 100%);
  background: #0e1420; border: 1px solid var(--border); border-radius: 14px;
  padding: 14px;
}
.consent-title { font-weight: 600; margin-bottom: 6px; }
.consent-actions { display: flex; gap: 8px; justify-content: end; margin-top: 8px; }
.consent-actions .primary { background: #1d2430; }

#transpose {
  width: 220px; /* same as speed for consistency */
}
#transposeVal { min-width: 24px; display: inline-block; text-align: right; }