:root {
  color-scheme: dark;
  --bg: #0c1020;
  --panel: rgba(255, 255, 255, 0.08);
  --panel-strong: rgba(255, 255, 255, 0.13);
  --text: #f7f7fb;
  --muted: #b8bfd7;
  --accent: #7dd3fc;
  --green: #35d07f;
  --yellow: #ffd166;
  --orange: #ff9f43;
  --red: #ff5f6d;
  --white-key: #f7f3e8;
  --white-key-active: #bee3ff;
  --black-key: #151823;
  --black-key-active: #2563eb;
  --white-count: 15;
  --key-height: clamp(185px, 26vw, 250px);
  --black-height: calc(var(--key-height) * 0.62);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.23), transparent 34rem),
    radial-gradient(circle at top right, rgba(52, 211, 153, 0.14), transparent 36rem),
    var(--bg);
  color: var(--text);
}

button, select, input { font: inherit; }
button, select, input[type="checkbox"] { cursor: pointer; }

.app-shell {
  width: min(1220px, calc(100% - 24px));
  margin: 0 auto;
  padding: 28px 0 44px;
}

.hero { margin-bottom: 18px; }
.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 800;
}
.eyebrow.small { font-size: 0.72rem; margin-bottom: 4px; }

h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 10px; font-size: clamp(2rem, 4.6vw, 4rem); line-height: 0.95; }
h2 { margin-bottom: 6px; font-size: clamp(1.15rem, 2.4vw, 1.8rem); }
.intro { max-width: 820px; color: var(--muted); font-size: 1.02rem; line-height: 1.55; margin-bottom: 0; }

.controls-panel {
  display: grid;
  grid-template-columns: repeat(3, minmax(220px, 1fr));
  gap: 12px;
  margin: 18px 0 12px;
}

.control-card, .meter-panel, .keyboard-section {
  background: var(--panel);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 22px;
  box-shadow: 0 24px 80px rgba(0,0,0,0.22);
}
.control-card { padding: 16px; }
.label {
  display: block;
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 800;
  margin-bottom: 7px;
}
.control-select, .key-text-input {
  width: 100%;
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 14px;
  background: rgba(12,16,32,0.78);
  color: var(--text);
  padding: 12px 13px;
  outline: none;
}
.control-select:focus, .key-text-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(125,211,252,0.18); }
.hint { color: var(--muted); line-height: 1.45; margin-bottom: 0; }
.compact { font-size: 0.85rem; margin-top: 8px; }

.tuner-card { display: grid; gap: 12px; }
.button-row, .write-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.primary-button, .secondary-button {
  border: 0;
  border-radius: 999px;
  padding: 11px 15px;
  font-weight: 850;
  transition: transform 0.16s ease, opacity 0.16s ease, background 0.16s ease;
}
.primary-button { background: linear-gradient(135deg, var(--accent), var(--green)); color: #06111d; }
.secondary-button { background: rgba(255,255,255,0.12); color: var(--text); border: 1px solid rgba(255,255,255,0.16); }
.primary-button:hover, .secondary-button:hover { transform: translateY(-1px); }
button:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }
.status-card {
  background: rgba(0,0,0,0.17);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 18px;
  padding: 12px;
  min-height: 82px;
}
.status-card strong { display: block; font-size: clamp(1.55rem, 3vw, 2.2rem); margin: 2px 0; }
.status-card span:last-child { color: var(--muted); font-size: 0.9rem; }

.meter-panel {
  position: sticky;
  top: 0;
  z-index: 8;
  padding: 14px 16px;
  margin: 12px 0;
  backdrop-filter: blur(18px);
}
.meter-copy { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 10px; }
.meter-copy strong { font-size: 1rem; }
.meter-track {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr 0.7fr 1fr 1fr;
  height: 28px;
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.18);
  background: rgba(0,0,0,0.2);
}
.meter-zone { min-width: 0; }
.left-edge, .right-edge { background: var(--red); }
.left-mid, .right-mid { background: linear-gradient(90deg, var(--orange), var(--yellow)); }
.right-mid { background: linear-gradient(90deg, var(--yellow), var(--orange)); }
.zone-center { background: var(--green); }
.meter-needle {
  position: absolute;
  top: -5px;
  width: 4px;
  height: 38px;
  background: #fff;
  border-radius: 999px;
  transform: translateX(-50%);
  box-shadow: 0 0 0 4px rgba(255,255,255,0.2), 0 0 18px rgba(255,255,255,0.6);
  transition: left 0.08s linear;
}
.meter-labels { display: flex; justify-content: space-between; color: var(--muted); font-size: 0.78rem; margin-top: 6px; }
#permissionHint { font-size: 0.82rem; margin-top: 7px; }

.keyboard-section { padding: 16px; margin-top: 12px; }
.section-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 12px;
}
.pill {
  color: #06111d;
  background: linear-gradient(135deg, var(--yellow), var(--green));
  padding: 8px 12px;
  border-radius: 999px;
  font-weight: 850;
  font-size: 0.86rem;
  white-space: nowrap;
}
.toggle-group { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; }
.toggle {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 1px solid rgba(255,255,255,0.14);
  background: rgba(255,255,255,0.08);
  border-radius: 999px;
  padding: 8px 11px;
  color: var(--text);
  font-weight: 700;
  font-size: 0.86rem;
}
.write-tools {
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(0,0,0,0.12);
  border-radius: 18px;
  padding: 12px;
  margin-bottom: 12px;
}
.simple-write {
  display: grid;
  grid-template-columns: minmax(220px, 0.85fr) minmax(320px, 1.6fr);
  gap: 12px;
  align-items: end;
}
.simple-write .write-row { flex-wrap: nowrap; }
.simple-write .secondary-button { white-space: nowrap; }
.write-row .key-text-input { flex: 1 1 260px; }

.keyboard-shell {
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.12);
  background: #07343d;
}
.manual-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  color: rgba(255,255,255,0.86);
  font-weight: 800;
  font-size: 0.84rem;
  background: rgba(0,0,0,0.16);
}
.keyboard-viewport {
  overflow: hidden;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: #07343d;
}
.keyboard {
  position: relative;
  width: 100%;
  height: var(--key-height);
  user-select: none;
  touch-action: none;
}
.key {
  position: absolute;
  top: 0;
  border: 0;
  padding: 0;
  font: inherit;
  text-align: center;
  -webkit-tap-highlight-color: transparent;
}
.white-key {
  width: calc(100% / var(--white-count));
  height: var(--key-height);
  background: linear-gradient(#fffdf5, var(--white-key));
  color: #1b2030;
  border: 1px solid #d8d0bd;
  border-radius: 0 0 12px 12px;
  z-index: 1;
  box-shadow: inset 0 -10px 18px rgba(0,0,0,0.12);
}
.black-key {
  width: calc((100% / var(--white-count)) * 0.56);
  height: var(--black-height);
  background: linear-gradient(#252b3c, var(--black-key));
  color: #fff;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 0 0 10px 10px;
  z-index: 3;
  box-shadow: 0 8px 14px rgba(0,0,0,0.38), inset 0 -12px 14px rgba(0,0,0,0.38);
}
.key.active.white-key, .key.voice-active.white-key { background: linear-gradient(#e3f4ff, var(--white-key-active)); box-shadow: inset 0 -8px 18px rgba(56,189,248,0.35), 0 0 0 2px rgba(125,211,252,0.35); }
.key.active.black-key, .key.voice-active.black-key { background: linear-gradient(#38bdf8, var(--black-key-active)); box-shadow: 0 10px 20px rgba(37,99,235,0.5); }
.key.center-c.white-key { outline: 3px solid rgba(53,208,127,0.45); outline-offset: -5px; }
.key.center-c.black-key { outline: 2px solid rgba(53,208,127,0.65); outline-offset: -4px; }
.key.selected-for-writing.white-key { box-shadow: inset 0 -10px 18px rgba(0,0,0,0.12), 0 0 0 3px rgba(255, 209, 102, 0.7); }
.key.selected-for-writing.black-key { box-shadow: 0 8px 14px rgba(0,0,0,0.38), inset 0 -12px 14px rgba(0,0,0,0.38), 0 0 0 3px rgba(255, 209, 102, 0.8); }
.key-content {
  position: absolute;
  left: 4px;
  right: 4px;
  bottom: 9px;
  display: grid;
  gap: 2px;
  justify-items: center;
  pointer-events: none;
}
.black-key .key-content { bottom: 7px; }
.sargam-label { font-weight: 900; font-size: clamp(0.66rem, 1.5vw, 1.05rem); line-height: 1; }
.note-label { font-size: clamp(0.54rem, 1.05vw, 0.68rem); color: rgba(27,32,48,0.72); font-weight: 800; }
.black-key .note-label { color: rgba(255,255,255,0.68); }
.sound-label { font-size: clamp(0.5rem, 0.9vw, 0.61rem); color: rgba(27,32,48,0.58); }
.black-key .sound-label { color: rgba(255,255,255,0.55); }
.key-write {
  position: absolute;
  left: 7px;
  right: 7px;
  bottom: 44px;
  background: rgba(255, 209, 102, 0.95);
  color: #2b2107;
  border: 1px solid rgba(43,33,7,0.15);
  border-radius: 999px;
  padding: 3px 4px;
  font-size: clamp(0.52rem, 1.1vw, 0.68rem);
  font-weight: 900;
  line-height: 1.1;
  pointer-events: none;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  z-index: 5;
  box-shadow: 0 4px 10px rgba(0,0,0,0.12);
}
.black-key .key-write { bottom: 18px; left: 3px; right: 3px; font-size: clamp(0.45rem, 0.85vw, 0.56rem); z-index: 6; }
.hide-sargam .sargam-label { display: none; }
.hide-english .note-label, .hide-english .sound-label { display: none; }

@media (max-width: 860px) {
  .controls-panel { grid-template-columns: 1fr; }
  .section-header { display: grid; }
  .toggle-group { justify-content: flex-start; }
  .simple-write { grid-template-columns: 1fr; }
  .simple-write .write-row { flex-wrap: wrap; }
  .simple-write .key-text-input { flex-basis: 100%; }
  .manual-label-row { align-items: flex-start; flex-direction: column; }
  .meter-panel { top: 0; }
}

@media (max-width: 560px) {
  .app-shell { width: min(100% - 16px, 1220px); padding-top: 22px; }
  .control-card, .meter-panel, .keyboard-section { border-radius: 18px; }
  .meter-copy { display: grid; gap: 2px; }
  .button-row .primary-button, .button-row .secondary-button { flex: 1; }
  :root { --key-height: clamp(150px, 43vw, 190px); }
  .manual-label-row { font-size: 0.78rem; }
}