/* ==========================================================================
   synth.css — the Oh a Synth world: charcoal panel, cream silkscreen,
   walnut cheeks, section-accent colors. Every value from the app
   (css/ohasynth.css + PluginEditor.cpp) — see NOTES-source-analysis.md §1.2.
   ========================================================================== */

body.world-synth {
  --bg: #141416;            /* page behind the instrument */
  --surface: #232327;       /* --panel-2 */
  --surface-2: #2b2b30;     /* --panel */
  --rule: #38383e;
  --paper: #ece5d5;         /* --cream */
  --muted: #b9b2a2;         /* --cream-dim */
  --accent: #ff5a3c;        /* --led */
  --accent-ink: #141416;

  /* the app's section accents */
  --sec-red: #c8413b;
  --sec-orange: #e0a33b;
  --sec-yellow: #e6d06b;
  --sec-blue: #4f9ed9;
  --sec-green: #9bba5e;

  /* plugin wood cheeks (PluginEditor.cpp:881-882) */
  --walnut-hi: #5e3d27;
  --walnut-lo: #372315;
}

/* The brand line of the hardware: italic 800, like .oha-brand */
.world-synth .hero h1 {
  font-style: italic;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.world-synth .hero .kicker::after {
  content: "";
  display: inline-block;
  vertical-align: baseline;
  margin-inline-start: 0.75em;
  width: 26px; height: 12px;
  background: linear-gradient(to right,
    var(--sec-red) 0 5px, transparent 5px 7px,
    var(--sec-orange) 7px 12px, transparent 12px 14px,
    var(--sec-yellow) 14px 19px, transparent 19px 21px,
    var(--sec-blue) 21px 26px);
}

/* ---- the stage: a cabinet before the WebGL arrives -------------------------- */
.synth-stage .container { position: relative; }
.synth-stage [data-synth-mount] {
  position: relative;
  background: linear-gradient(#2e2e33, #2b2b30);  /* panel gradient, as built */
  border: 1px solid #1a1a1d;
  border-radius: 8px;
  padding: clamp(0.75rem, 2vw, 1.5rem);
  padding-inline: clamp(1.5rem, 4vw, 3rem);
}
@media (min-width: 40rem) {
  /* walnut end cheeks, quoting the plugin editor's drawWoodCheek */
  .synth-stage [data-synth-mount]::before,
  .synth-stage [data-synth-mount]::after {
    content: "";
    position: absolute;
    top: 0; bottom: 0;
    width: clamp(1rem, 2.5vw, 2.125rem);
    background:
      repeating-linear-gradient(94deg,
        rgba(0, 0, 0, 0.12) 0 2px, transparent 2px 7px),
      linear-gradient(160deg, var(--walnut-hi), var(--walnut-lo));
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
  }
  .synth-stage [data-synth-mount]::before { left: 0; border-radius: 8px 0 0 8px; }
  .synth-stage [data-synth-mount]::after { right: 0; border-radius: 0 8px 8px 0; }
}
.synth-stage .media-slot .frame {
  background: #232327;
  border-color: #1a1a1d;
}
.synth-stage figcaption {
  text-align: center;
  color: var(--muted);
}

/* ---- features: each section wears its app accent ----------------------------- */
.world-synth .feature h3 { letter-spacing: 0.22em; }
.world-synth .feature:nth-of-type(1) h3 { border-color: var(--sec-orange); } /* DCO */
.world-synth .feature:nth-of-type(2) h3 { border-color: var(--sec-red); }    /* VCF */
.world-synth .feature:nth-of-type(3) h3 { border-color: var(--sec-green); }  /* CHORUS */
.world-synth .feature:nth-of-type(4) h3 { border-color: var(--sec-blue); }   /* ARPEGGIO */
.world-synth .feature:nth-of-type(5) h3 { border-color: var(--sec-yellow); } /* PATCHES */
.world-synth .feature:nth-of-type(6) h3 { border-color: var(--sec-blue); }   /* MIDI */

.world-synth .feature .media-slot .frame {
  background: var(--surface);
  border-color: #1a1a1d;
}

/* ---- offer cards -------------------------------------------------------------- */
.offer-grid {
  display: grid;
  gap: var(--space-3);
  margin-block-start: var(--space-3);
}
@media (min-width: 52rem) {
  .offer-grid { grid-template-columns: 1fr 1fr; }
}
.offer-card {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: var(--space-3);
}
.offer-card h3 {
  font-size: var(--step--1);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  border-bottom: 2px solid var(--muted);
  display: inline-block;
  padding-block-end: var(--space-1);
}
.offer-card > p { margin-block: var(--space-2); }

/* ---- spec sheet: hardware-manual back page -------------------------------------- */
.world-synth .spec-table th[scope="row"] { color: var(--muted); }
.world-synth .spec-table tr { border-color: #38383e; }

/* keep long spec values readable */
.world-synth .spec-table td { max-width: 60ch; }

/* ==========================================================================
   The playable synth (js/synth/ui.js). Control chrome quotes the app's own
   stylesheet: recessed fills #1d1d20, inset borders #0f0f11, fader caps with
   a cream indicator line, LED buttons with #ff5a3c glow. (ohasynth.css)
   ========================================================================== */
.sy-ui {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 20rem;
}

.sy-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 4px 2px 0;
}
.sy-brand { display: flex; align-items: baseline; gap: 12px; }
.sy-brand em {
  font-style: italic;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: 0.03em;
}
.sy-stripes { display: inline-flex; gap: 2px; align-self: center; }
.sy-stripes i { width: 5px; height: 15px; display: block; }
.sy-stripes i:nth-child(1) { background: var(--sec-red); }
.sy-stripes i:nth-child(2) { background: var(--sec-orange); }
.sy-stripes i:nth-child(3) { background: var(--sec-yellow); }
.sy-stripes i:nth-child(4) { background: var(--sec-blue); }
.sy-sub { font-size: 0.66rem; letter-spacing: 0.25em; color: var(--muted); }
.sy-midi { font-size: 0.72rem; color: var(--muted); }
.sy-midi.ok { color: #9bba5e; }

.sy-panel {
  display: flex;
  align-items: stretch;
  gap: 8px;
  flex-wrap: wrap;
}
.sy-section {
  display: flex;
  flex-direction: column;
  background: #232327;
  border: 1px solid #38383e;
  border-radius: 6px;
  flex: 0 1 auto;
}
.sy-sec-head {
  --accent: var(--muted);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-align: center;
  padding: 5px 10px 4px;
  border-bottom: 2px solid var(--accent);
}
.sy-sec-body {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 12px 10px 8px;
  flex: 1;
}

/* vertical sliders */
.sy-sl { display: flex; flex-direction: column; align-items: center; width: 34px; }
.sy-sl-track {
  position: relative;
  width: 24px;
  height: 96px;
  border-radius: 3px;
  background:
    repeating-linear-gradient(to bottom, transparent 0 12px, #3c3c42 12px 13px),
    linear-gradient(#1d1d20, #232327);
  border: 1px solid #0f0f11;
  cursor: ns-resize;
  touch-action: none;
}
.sy-sl-fill {
  position: absolute;
  left: 50%; bottom: 4px;
  width: 4px;
  transform: translateX(-50%);
  background: #585860;
  border-radius: 2px;
  pointer-events: none;
}
.sy-sl-thumb {
  position: absolute;
  left: 50%; bottom: 0;
  width: 24px; height: 14px;
  transform: translateX(-50%);
  background: linear-gradient(#4a4a52, #2e2e34 45%, #222226 55%, #3a3a41);
  border: 1px solid #101012;
  border-radius: 2px;
  pointer-events: none;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}
.sy-sl-thumb::after {
  content: "";
  position: absolute;
  left: 2px; right: 2px; top: 50%;
  height: 2px;
  margin-top: -1px;
  background: var(--paper);
}
.sy-sl-label {
  margin-top: 6px;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-align: center;
  white-space: nowrap;
}

/* buttons */
.sy-btn {
  font: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--paper);
  background: linear-gradient(#3a3a41, #26262b);
  border: 1px solid #101012;
  border-radius: 4px;
  padding: 8px 12px;
  cursor: pointer;
}
.sy-btn:hover { background: linear-gradient(#42424a, #2c2c32); }
.sy-btn.on { background: linear-gradient(#4a4a53, #32323a); box-shadow: inset 0 0 0 1px #55555e; }
/* the patch stepper reads as one row: ‹ NAME ›  DEMO */
.sy-sec-patch { align-items: center; gap: 6px; }
.sy-patch-name {
  min-width: 10ch;
  text-align: center;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
}
.sy-sec-patch .sy-demo { margin-inline-start: 10px; }
.sy-demo { letter-spacing: 0.12em; }

.sy-ch-btn {
  font: inherit;
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--paper);
  background: linear-gradient(#3a3a41, #26262b);
  border: 1px solid #101012;
  border-radius: 4px;
  width: 44px; height: 44px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.sy-led {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #4a1410;
  box-shadow: inset 0 0 2px #000;
}
.sy-ch-btn.on .sy-led,
.sy-power-led {
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}

/* level meter — six LEDs driven by the real analyser */
.sy-meter-wrap { display: flex; flex-direction: column; align-items: center; }
.sy-meter {
  display: flex;
  flex-direction: column-reverse;
  gap: 3px;
  padding: 6px 8px;
  background: #1d1d20;
  border: 1px solid #0f0f11;
  border-radius: 3px;
}
.sy-meter i {
  width: 14px; height: 6px;
  border-radius: 1px;
  background: #35251a;
}
.sy-meter i.on { background: var(--sec-orange); box-shadow: 0 0 5px var(--sec-orange); }
.sy-meter i:nth-child(6).on { background: var(--accent); box-shadow: 0 0 6px var(--accent); }

/* keyboard */
.sy-kbd-help {
  font-size: 0.62rem;
  letter-spacing: 0.05em;
  /* The app prints this hint in #6f6f76, which is 2.82:1 on the panel.
     At this size AA needs 4.5:1, so the site lightens it — legibility
     wins over exact fidelity (noted in NOTES-source-analysis.md §3). */
  color: #9a9aa1;
  text-align: right;
}
.sy-kbd {
  position: relative;
  height: 8.5rem;
  background: #0d0d0f;
  border-radius: 4px;
  overflow: hidden;
  touch-action: none;
}
.sy-key {
  position: absolute;
  top: 0;
  border-radius: 0 0 3px 3px;
  cursor: pointer;
  padding: 0;
  font-size: 0.58rem;
  /* app prints key names in #8a8270 (3.09:1 on the key face) — darkened
     here to clear AA at this size on both the resting and held key
     faces, same warm-grey family */
  color: #544e41;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 4px;
}
.sy-key-w {
  height: 100%;
  background: linear-gradient(#f4efe2, #e7e0cd);
  border: 1px solid #b6ae99;
  z-index: 1;
}
.sy-key-w.held { background: linear-gradient(#d8d2bf, #c9c2ac); }
.sy-key-b {
  height: 62%;
  width: 2.7%;
  background: linear-gradient(#3a3a3e, #141416);
  border: 1px solid #000;
  z-index: 2;
}
.sy-key-b.held { background: linear-gradient(#5a5a60, #2c2c30); }
.sy-key:focus-visible { outline: 2px solid var(--accent); outline-offset: -3px; z-index: 3; }

/* power overlay — the gesture gate */
.sy-power {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: rgba(20, 20, 22, 0.72);
  border: 1px dashed #46464c;
  border-radius: 6px;
  color: var(--paper);
  font: inherit;
  font-size: var(--step-1);
  font-weight: 700;
  cursor: pointer;
}
.sy-power:hover { background: rgba(20, 20, 22, 0.6); }
.sy-power-led { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }

@media (max-width: 40rem) {
  .sy-panel { justify-content: center; }
  .sy-kbd { height: 7rem; }
  /* the brand lockup would wrap into its own subtitle at this width */
  .sy-brand { flex-wrap: wrap; gap: 8px; }
  .sy-brand em { font-size: 1.05rem; }
  .sy-sub { display: none; }
  .sy-kbd-help { text-align: left; }
}

/* ---- WebGL cabinet (gl/cabinet.js): shader replaces the CSS surfaces ------ */
.sy-cabinet-gl {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border-radius: 8px;
  z-index: 0;
}
.synth-stage .gl-on {
  background: none;               /* the shader paints the panel */
}
.synth-stage .gl-on::before,
.synth-stage .gl-on::after {
  content: none;                  /* the shader paints the cheeks */
}
.synth-stage .gl-on > *:not(.sy-cabinet-gl) {
  position: relative;
  z-index: 1;
}