:root {
  --bg: 20 16 13;
  --panel: 30 23 18;
  --panel-2: 26 20 16;
  --amber: 232 147 66;
  --amber-deep: 189 112 42;
  --cream: 240 231 218;
  --muted: 168 150 132;
  --line: 255 255 255;

  --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);
  --ease-out-quad: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.25rem;
  background: rgb(var(--bg));
  color: rgb(var(--cream));
  font-family: 'Inter', system-ui, sans-serif;
}

.console {
  width: 100%;
  max-width: 860px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 40px 80px -36px rgb(0 0 0 / 0.7);
}

.panel {
  padding: 2.25rem 2rem;
}

.panel-info {
  background: rgb(var(--panel));
}

.panel-form {
  background: rgb(var(--panel-2));
  border-left: 1px solid rgb(var(--line) / 0.06);
}

/* ---------- Info panel ---------- */
.on-air {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.3rem 0.7rem;
  border: 1px solid rgb(var(--amber) / 0.35);
  border-radius: 999px;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgb(var(--amber));
  margin-bottom: 1rem;
}

.on-air .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgb(var(--amber));
  animation: dot-pulse 1.8s ease-in-out infinite;
}

@keyframes dot-pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.4;
    transform: scale(0.7);
  }
}

@media (prefers-reduced-motion: reduce) {
  .on-air .dot {
    animation: none;
  }
}

.panel-info h1 {
  font-family: 'Sora', sans-serif;
  font-size: 1.65rem;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 0.75rem;
}

.panel-info p {
  font-size: 0.88rem;
  color: rgb(var(--muted));
  line-height: 1.55;
  margin-bottom: 1.5rem;
}

.waveform {
  display: flex;
  align-items: center;
  gap: 3px;
  height: 36px;
  margin-bottom: 1.75rem;
}

.waveform .bar {
  width: 3px;
  border-radius: 2px;
  background: rgb(var(--amber) / 0.55);
  animation: wave 1.6s ease-in-out infinite;
}

@keyframes wave {
  0%,
  100% {
    transform: scaleY(0.4);
  }
  50% {
    transform: scaleY(1);
  }
}

@media (prefers-reduced-motion: reduce) {
  .waveform .bar {
    animation: none;
    transform: scaleY(0.7);
  }
}

.frequencies {
  list-style: none;
  margin-bottom: 1.75rem;
}

.frequencies li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid rgb(var(--line) / 0.07);
}

.frequencies li:first-child {
  border-top: 1px solid rgb(var(--line) / 0.07);
}

.freq-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgb(var(--muted));
  flex-shrink: 0;
}

.freq-value {
  font-size: 0.86rem;
  font-weight: 500;
  color: rgb(var(--cream));
  text-decoration: none;
  text-align: right;
}

a.freq-value:hover {
  color: rgb(var(--amber));
}

.channels {
  display: flex;
  gap: 0.6rem;
}

.channel {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  border: 1px solid rgb(var(--line) / 0.12);
  color: rgb(var(--muted));
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  text-decoration: none;
  transition:
    border-color 150ms ease,
    color 150ms ease;
}

.channel:hover {
  border-color: rgb(var(--amber) / 0.5);
  color: rgb(var(--amber));
}

/* ---------- Form panel ---------- */
.panel-form h2 {
  font-family: 'Sora', sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 1.1rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 0.85rem;
}

.field label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.64rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: rgb(var(--muted));
}

.field input,
.field select,
.field textarea {
  font-family: 'Inter', sans-serif;
  font-size: 0.88rem;
  color: rgb(var(--cream));
  background: rgb(0 0 0 / 0.25);
  border: 1px solid rgb(var(--line) / 0.12);
  border-radius: 8px;
  padding: 0.55rem 0.7rem;
  outline: none;
  transition: border-color 200ms ease;
}

.field textarea {
  resize: vertical;
  min-height: 70px;
}

.field input::placeholder,
.field textarea::placeholder {
  color: rgb(var(--muted) / 0.5);
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: rgb(var(--amber) / 0.7);
}

.field select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, rgb(var(--muted)) 50%),
    linear-gradient(135deg, rgb(var(--muted)) 50%, transparent 50%);
  background-position:
    calc(100% - 16px) center,
    calc(100% - 11px) center;
  background-size:
    5px 5px,
    5px 5px;
  background-repeat: no-repeat;
}

.transmit-btn {
  position: relative;
  width: 100%;
  margin-top: 0.4rem;
  padding: 0.75rem;
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: rgb(var(--bg));
  background: rgb(var(--amber));
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition:
    background-color 200ms ease,
    transform 150ms var(--ease-out-quad);
}

.transmit-btn:hover:not(:disabled) {
  background: rgb(var(--amber-deep));
}

.transmit-btn:active:not(:disabled) {
  transform: scale(0.98);
}

.transmit-btn:disabled {
  opacity: 0.75;
  cursor: not-allowed;
}

.field.is-invalid input,
.field.is-invalid select,
.field.is-invalid textarea {
  border-color: rgb(200 90 70 / 0.7);
  animation: shake 380ms var(--ease-out-quad);
}

@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }
  20% {
    transform: translateX(-5px);
  }
  40% {
    transform: translateX(4px);
  }
  60% {
    transform: translateX(-3px);
  }
  80% {
    transform: translateX(2px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .field.is-invalid input,
  .field.is-invalid select,
  .field.is-invalid textarea {
    animation: none;
  }
}

/* ---------- Success state ---------- */
.success[hidden],
#transmit-form[hidden] {
  display: none;
}

.success {
  text-align: center;
  padding-top: 1.5rem;
  animation: rise-in 340ms var(--ease-out-expo) both;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .success {
    animation: none;
  }
}

.success-ring {
  width: 48px;
  height: 48px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  border: 2px solid rgb(var(--amber));
  color: rgb(var(--amber));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.success h2 {
  font-family: 'Sora', sans-serif;
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.success p {
  font-size: 0.86rem;
  color: rgb(var(--muted));
  margin-bottom: 1.5rem;
}

.reset-btn {
  font-family: 'Inter', sans-serif;
  font-size: 0.82rem;
  color: rgb(var(--amber));
  background: none;
  border: none;
  border-bottom: 1px solid rgb(var(--amber) / 0.4);
  cursor: pointer;
  padding: 0;
}

.reset-btn:hover {
  border-bottom-color: rgb(var(--amber));
}

@media (max-width: 720px) {
  .console {
    grid-template-columns: 1fr;
  }

  .panel-form {
    border-left: none;
    border-top: 1px solid rgb(var(--line) / 0.06);
  }
}

@media (max-width: 420px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}