:root {
  color-scheme: light;
  --bg: #f6f0e6;
  --bg-accent: #ffe5c4;
  --ink: #222016;
  --muted: #615a4c;
  --primary: #1d4f52;
  --primary-ink: #f7f1e7;
  --warn: #b34a2b;
  --card: #fff8ee;
  --shadow: 0 18px 50px rgba(34, 32, 22, 0.12);
  --radius: 22px;
  --font: "Fraunces", "Cormorant Garamond", "Georgia", serif;
  --font-ui: "Work Sans", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-ui);
  color: var(--ink);
  background:
    radial-gradient(circle at top left, #ffe9d2 0%, transparent 60%),
    radial-gradient(circle at bottom right, #fcd9b3 0%, transparent 55%),
    var(--bg);
  display: flex;
  justify-content: center;
  padding: 48px 24px 64px;
}

.app {
  width: min(980px, 100%);
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.header {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.icon {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, #f7d7b6, #f1b77c);
  box-shadow: 0 12px 26px rgba(34, 32, 22, 0.16);
  overflow: hidden;
}

.icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.eyebrow {
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.14em;
  margin: 0 0 8px;
  color: var(--muted);
}

h1 {
  font-family: var(--font);
  font-size: clamp(36px, 5vw, 56px);
  margin: 0;
}

h2 {
  font-family: var(--font);
  font-size: 22px;
  margin: 0 0 8px;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  border: none;
  border-radius: 999px;
  padding: 12px 20px;
  font-weight: 600;
  font-size: 14px;
  font-family: var(--font-ui);
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease, background 120ms ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn.primary {
  background: var(--primary);
  color: var(--primary-ink);
  box-shadow: 0 10px 22px rgba(29, 79, 82, 0.28);
}

.btn.ghost {
  background: transparent;
  color: var(--primary);
  border: 1px solid rgba(29, 79, 82, 0.35);
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.readout {
  display: grid;
  gap: 8px;
}

.label {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.note {
  font-family: var(--font);
  font-size: clamp(44px, 5vw, 68px);
  transition: color 160ms ease;
}

.note.accurate {
  color: var(--primary);
}

.note.off {
  color: var(--warn);
}

.freq {
  font-size: 22px;
  font-weight: 600;
}

.cents {
  color: var(--muted);
  font-size: 16px;
}

.meter {
  position: relative;
  height: 50px;
  margin-top: 10px;
}

.meter-track {
  position: absolute;
  inset: 12px 0 12px 0;
  border-radius: 999px;
  background: linear-gradient(90deg, #f0b19a, #ffe2bf 45%, #c9e8da 55%, #ffe2bf 65%, #f0b19a);
  box-shadow: inset 0 0 0 1px rgba(34, 32, 22, 0.12);
}

.meter-needle {
  position: absolute;
  top: 2px;
  left: 0;
  width: 2px;
  height: 46px;
  background: #222016;
  border-radius: 2px;
  transform: translateX(-1px);
  transition: transform 120ms ease;
}

.meter-label {
  position: absolute;
  top: 32px;
  font-size: 12px;
  color: var(--muted);
}

.meter-label.left {
  left: 4px;
}

.meter-label.right {
  right: 4px;
}

.status {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 18px;
  font-size: 14px;
  color: var(--muted);
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #d0c4b6;
  box-shadow: inset 0 0 0 2px rgba(0, 0, 0, 0.08);
}

.dot.active {
  background: #78c2a4;
}

.dot.off {
  background: var(--warn);
}

.muted {
  color: var(--muted);
  margin: 0 0 16px;
}

.tuner {
  display: grid;
  gap: 16px;
}

.tuner-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.tuner-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.select {
  border-radius: 14px;
  padding: 12px 14px;
  font-size: 16px;
  border: 1px solid rgba(34, 32, 22, 0.2);
  font-family: var(--font-ui);
}

.select.mini {
  padding: 8px 12px;
  font-size: 14px;
}

.mini-label {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.slider {
  flex: 1 1 220px;
}

.slider-value {
  min-width: 80px;
  font-weight: 600;
}

.hint {
  color: var(--muted);
  font-size: 13px;
}

.toggle {
  position: relative;
  width: 46px;
  height: 26px;
}

.toggle input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-track {
  position: absolute;
  inset: 0;
  background: rgba(34, 32, 22, 0.15);
  border-radius: 999px;
  transition: background 120ms ease;
}

.toggle-track::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff8ee;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
  transition: transform 120ms ease;
}

.toggle input:checked + .toggle-track {
  background: var(--primary);
}

.toggle input:checked + .toggle-track::after {
  transform: translateX(20px);
}

.tuner-freq {
  font-weight: 600;
  font-size: 18px;
}

@media (max-width: 680px) {
  body {
    padding: 32px 18px 48px;
  }

  .controls {
    width: 100%;
  }

  .btn {
    flex: 1 1 160px;
  }
}