@import url('https://fonts.googleapis.com/css2?family=Instrument+Serif&family=JetBrains+Mono:wght@400;600&display=swap');

:root {
  --bg: #F7F6F3;
  --surface: #FFFFFF;
  --border: #EAEAEA;
  --text: #111111;
  --muted: #62615E;
  --btn-hover: #333333;
  --pale-blue: #E1F3FE;
  --pale-blue-text: #1c6b91;
  --pale-green: #EDF3EC;
  --pale-green-text: #2f6b3f;
  --pale-amber: #FBF3DB;
  --pale-amber-text: #8a6d1d;
  --danger-bg: #FBEAEA;
  --danger-text: #a13d3d;
  --backdrop: rgba(17, 17, 17, 0.35);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Monaco, Consolas, monospace;
}

/* Dark palette: auto (OS preference) or explicit override via html[data-theme] */
@media (prefers-color-scheme: dark) {
  html:not([data-theme]) {
    --bg: #15140F;
    --surface: #1C1B17;
    --border: #302E27;
    --text: #F2F1EC;
    --muted: #9A988F;
    --btn-hover: #D8D6CE;
    --pale-blue: #12293A;
    --pale-blue-text: #8FD1F5;
    --pale-green: #16241A;
    --pale-green-text: #8FCB9A;
    --pale-amber: #2A2210;
    --pale-amber-text: #E4C874;
    --danger-bg: #3A1414;
    --danger-text: #F2A9A9;
    --backdrop: rgba(0, 0, 0, 0.5);
  }
}

html[data-theme='dark'] {
  --bg: #15140F;
  --surface: #1C1B17;
  --border: #302E27;
  --text: #F2F1EC;
  --muted: #9A988F;
  --btn-hover: #D8D6CE;
  --pale-blue: #12293A;
  --pale-blue-text: #8FD1F5;
  --pale-green: #16241A;
  --pale-green-text: #8FCB9A;
  --pale-amber: #2A2210;
  --pale-amber-text: #E4C874;
  --danger-bg: #3A1414;
  --danger-text: #F2A9A9;
  --backdrop: rgba(0, 0, 0, 0.5);
}

html[data-theme='light'] {
  --bg: #F7F6F3;
  --surface: #FFFFFF;
  --border: #EAEAEA;
  --text: #111111;
  --muted: #62615E;
  --btn-hover: #333333;
  --pale-blue: #E1F3FE;
  --pale-blue-text: #1c6b91;
  --pale-green: #EDF3EC;
  --pale-green-text: #2f6b3f;
  --pale-amber: #FBF3DB;
  --pale-amber-text: #8a6d1d;
  --danger-bg: #FBEAEA;
  --danger-text: #a13d3d;
  --backdrop: rgba(17, 17, 17, 0.35);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  transition: background-color 160ms ease-out, color 160ms ease-out;
}

@media (prefers-reduced-motion: reduce) {
  body {
    transition: none;
  }
}

header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.5rem;
  padding: 1rem 1.5rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

header h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.6rem;
  letter-spacing: -0.02em;
  color: var(--text);
}

.airport-picker {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.conn-status-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.8rem;
  height: 1.8rem;
  border-radius: 999px;
  background: var(--danger-bg);
}
.conn-status-wrap:has(.conn-status.live) {
  background: var(--pale-green);
}

.conn-status {
  color: var(--danger-text);
  font-size: 1rem;
  line-height: 1;
}
.conn-status.live {
  color: var(--pale-green-text);
}

.theme-toggle {
  margin-left: auto;
  background: none;
  border: none;
  padding: 0;
}
.theme-toggle:hover {
  background: none;
}

.theme-toggle-track {
  display: block;
  width: 44px;
  height: 24px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  position: relative;
}

.theme-toggle-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  transform: translateX(0);
  transition: transform 200ms cubic-bezier(0.23, 1, 0.32, 1);
}

.theme-toggle-icon {
  position: absolute;
  font-size: 11px;
  color: var(--bg);
  transition: opacity 200ms cubic-bezier(0.23, 1, 0.32, 1);
}
.theme-toggle-icon--sun {
  opacity: 1;
}
.theme-toggle-icon--moon {
  opacity: 0;
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme]) .theme-toggle-thumb {
    transform: translateX(20px);
  }
  html:not([data-theme]) .theme-toggle-icon--sun {
    opacity: 0;
  }
  html:not([data-theme]) .theme-toggle-icon--moon {
    opacity: 1;
  }
}

html[data-theme='dark'] .theme-toggle-thumb {
  transform: translateX(20px);
}
html[data-theme='dark'] .theme-toggle-icon--sun {
  opacity: 0;
}
html[data-theme='dark'] .theme-toggle-icon--moon {
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .theme-toggle-thumb,
  .theme-toggle-icon {
    transition: none;
  }
}

main {
  padding: 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
}

.hidden {
  display: none !important;
}

.airport-settings {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  align-items: flex-end;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.airport-settings label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.atis-readout {
  display: flex;
  gap: 1.5rem;
  font-size: 0.95rem;
}
.atis-readout strong {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text);
}

input, select, textarea, button {
  font-family: inherit;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.6rem;
}

button {
  cursor: pointer;
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: background-color 160ms ease-out, transform 160ms ease-out;
}
button:hover {
  background: var(--btn-hover);
  border-color: var(--btn-hover);
}
button:active {
  transform: scale(0.97);
}
button .ph, button i.ph {
  font-size: 1.05em;
}

#modal-close {
  background: none;
  border: none;
  color: var(--muted);
}
#modal-close:hover {
  background: var(--bg);
  color: var(--text);
}
#modal-close:active {
  transform: scale(0.97);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 2px;
}

.table-scroll {
  overflow-x: auto;
}

table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

th, td {
  text-align: left;
  padding: 0.6rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

td {
  font-family: var(--font-mono);
}

th {
  font-family: var(--font-mono);
  color: var(--muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.72rem;
}

tbody tr:not(.empty-row):not(.status-row):hover {
  background: rgba(17, 17, 17, 0.03);
}

.new-row {
  animation: new-row-flash 1.6s ease-out;
}

@keyframes new-row-flash {
  0% { background: var(--pale-green); }
  100% { background: transparent; }
}

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

.empty-row td, .status-row td {
  font-family: var(--font-body);
  color: var(--muted);
  font-style: italic;
}

.status-row.error td {
  color: var(--danger-text);
  font-style: normal;
}

.hint {
  color: var(--muted);
  font-size: 0.85rem;
}

.modal {
  position: fixed;
  inset: 0;
  background: var(--backdrop);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  transition: opacity 160ms ease-out;
}

.modal.hidden {
  /* override the hard display:none so the fade can play; JS still toggles this class */
  display: flex !important;
  opacity: 0;
  pointer-events: none;
}

.modal-box {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  width: min(480px, 90vw);
  max-height: 90vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  box-shadow: 0 24px 60px -16px rgba(17, 17, 17, 0.18);
  transform: scale(1) translateY(0);
  transition: transform 160ms ease-out;
}

.modal-box h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.4rem;
  letter-spacing: -0.01em;
  margin: 0;
}

.modal.hidden .modal-box {
  transform: scale(0.96) translateY(8px);
}

@media (prefers-reduced-motion: reduce) {
  .modal, .modal-box {
    transition: none;
  }
}

.modal-close {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  font-size: 1.3rem;
  line-height: 1;
  padding: 0.3rem;
  border-radius: var(--radius-sm);
}

.route-type {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.9rem 0.75rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.route-type legend {
  padding: 0 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
}

.route-type label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.route-type input[type='text'],
.route-type select {
  width: 100%;
  margin: 0 0 0.2rem 1.6rem;
}

.route-type input[type='text']:disabled,
.route-type select:disabled {
  opacity: 0.4;
}

.squawk-row {
  display: flex;
  align-items: flex-end;
  gap: 0.75rem;
}
.squawk-row label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.output-label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.85rem;
  color: var(--muted);
}

#squawk-input,
#clearance-output {
  font-family: var(--font-mono);
}

#squawk-input {
  width: 6ch;
  letter-spacing: 0.1em;
}

textarea {
  resize: vertical;
  line-height: 1.5;
}

.copy-feedback {
  color: var(--pale-green-text);
  font-size: 0.85rem;
  min-height: 1.2em;
}

.generate-btn {
  padding: 0.45rem 0.7rem;
  font-size: 0.8rem;
  min-height: 36px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}