:root {
  --bg: #f6f4ee;
  --panel: #ffffff;
  --panel-soft: #f8f6ef;
  --line: #111111;
  --line-soft: #a9a9a1;
  --text: #111111;
  --muted: #5e5e5e;
  --accent: #1f9d63;
  --accent-strong: #126d45;
  --warn: #9a6700;
  --shadow: 0 10px 24px rgba(17, 17, 17, 0.04);
  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 10px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Chakra Petch", sans-serif;
  color: var(--text);
  background: var(--bg);
}

.page-glow {
  display: none;
}

.shell {
  width: min(1180px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 32px 0 56px;
}

.hero,
.layout {
  display: grid;
  gap: 20px;
}

.search-top {
  margin-bottom: 22px;
}

.hero {
  grid-template-columns: minmax(0, 1.1fr) minmax(260px, 380px);
  margin-bottom: 22px;
  align-items: center;
}

.hero-copy,
.hero-panel,
.hero-logo-panel,
.control-panel,
.results-panel {
  border: 2px solid var(--line-soft);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.hero-copy,
.hero-logo-panel,
.control-panel,
.results-panel {
  border-radius: var(--radius-lg);
}

.hero-copy,
.control-panel,
.results-panel {
  padding: 24px;
}

.hero-copy {
  min-width: 0;
}

.hero-panel {
  border-radius: 18px;
  padding: 22px;
  background: var(--panel-soft);
}

.hero-logo-panel {
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    linear-gradient(180deg, #ffffff 0%, var(--panel-soft) 100%);
}

.hero-logo {
  width: min(100%, 320px);
  height: auto;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent-strong);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.76rem;
  font-weight: 700;
}

.hero-brand {
  margin-bottom: 14px;
  font-size: clamp(2.8rem, 5vw, 4.6rem);
  letter-spacing: 0.18em;
  line-height: 0.92;
}

h1,
h2,
h3,
p,
ul {
  margin-top: 0;
}

h1 {
  max-width: 14ch;
  margin-bottom: 16px;
  font-size: clamp(1.2rem, 2.5vw, 2.3rem);
  line-height: 1.02;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(1.55rem, 3vw, 2.2rem);
}

.hero-text,
.status-message,
.reference-grid p,
.tips-list,
.program-copy,
.empty-state {
  color: var(--muted);
  line-height: 1.6;
}

.hero-text {
  max-width: 60ch;
  font-size: 1.02rem;
}

.hero-pills {
  display: grid;
  gap: 8px;
  padding-left: 20px;
  margin-bottom: 0;
}

.status-pill,
.tag,
.mode-badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  font-weight: 600;
}

.hero-pills li {
  color: var(--muted);
  line-height: 1.5;
  padding-left: 2px;
}

.hero-panel-label,
.reference-title,
.region-meta dt {
  margin-bottom: 12px;
  color: var(--accent-strong);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.tips-list {
  padding-left: 18px;
  margin-bottom: 0;
}

.layout {
  grid-template-columns: minmax(0, 1fr);
}

.filter-form,
.reference-card,
.results,
.program-panel {
  display: grid;
  gap: 16px;
}

.panel-heading {
  margin-bottom: 16px;
}

label {
  display: grid;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 500;
}

input,
select,
button,
textarea {
  font: inherit;
}

input,
select,
textarea {
  width: 100%;
  border: 2px solid var(--line);
  border-radius: var(--radius-sm);
  background: #ffffff;
  padding: 14px 15px;
  color: var(--text);
}

textarea {
  resize: vertical;
}

input::placeholder {
  color: #8c8c8c;
}

input:focus,
select:focus,
button:focus,
textarea:focus {
  outline: 3px solid rgba(31, 157, 99, 0.2);
  outline-offset: 2px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.actions,
.program-header,
.summary-bar,
.channel-header,
.channel-footer {
  display: flex;
  gap: 12px;
}

.actions {
  flex-wrap: wrap;
}

.program-header,
.summary-bar,
.channel-header,
.channel-footer {
  align-items: start;
  justify-content: space-between;
}

button {
  border: 2px solid var(--line);
  border-radius: 999px;
  padding: 14px 18px;
  cursor: pointer;
  transition:
    transform 140ms ease,
    background-color 140ms ease,
    box-shadow 140ms ease;
}

button:hover {
  transform: translateY(-1px);
}

#apply-button {
  background: var(--accent);
  border-color: var(--line);
  color: #ffffff;
  font-weight: 700;
  box-shadow: none;
}

.button-secondary {
  background: var(--panel-soft);
  color: var(--text);
}

.reference-card {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 2px solid var(--line-soft);
}

.reference-grid,
.region-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.reference-grid div,
.region-meta div,
.channel-card,
.empty-state,
.program-panel {
  border: 2px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: #ffffff;
}

.reference-grid div,
.region-meta div {
  padding: 14px;
}

.reference-label {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--muted);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.status-pill {
  padding: 9px 12px;
  border: 2px solid var(--line);
  background: var(--panel-soft);
  font-size: 0.82rem;
}

.status-pill[data-state="active"] {
  background: #e5f5ec;
  color: var(--accent-strong);
}

.status-pill[data-state="warning"] {
  background: #fff3d6;
  color: var(--warn);
}

.status-pill[data-state="idle"] {
  color: var(--muted);
}

.region-meta {
  margin: 0 0 22px;
}

.region-meta dd {
  margin: 0;
  font-family: "IBM Plex Mono", monospace;
  line-height: 1.55;
}

.program-panel {
  margin-bottom: 22px;
  padding: 18px;
}

.notes-bottom {
  margin-bottom: 22px;
}

.program-copy {
  margin-bottom: 0;
}

.program-output {
  min-height: 180px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.88rem;
  line-height: 1.6;
}

.results {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.channel-card {
  padding: 18px;
}

.channel-header {
  margin-bottom: 14px;
}

.tag {
  padding: 6px 10px;
  background: #e5f5ec;
  border: 1.5px solid var(--line);
  color: var(--accent-strong);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.mode-badge {
  padding: 6px 10px;
  background: var(--panel-soft);
  border: 1.5px solid var(--line);
  color: var(--text);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.76rem;
}

.channel-frequency {
  margin-bottom: 8px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 1.8rem;
  font-weight: 600;
  overflow-wrap: anywhere;
}

.channel-label {
  margin-bottom: 6px;
  font-size: 1.05rem;
  overflow-wrap: anywhere;
}

.channel-agency {
  margin-bottom: 10px;
  color: var(--accent-strong);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.83rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.airport-frequency-list {
  display: grid;
  gap: 10px;
}

.airport-frequency-row {
  display: grid;
  gap: 4px;
  padding: 10px 12px;
  border: 1.5px solid var(--line);
  border-radius: 12px;
  background: var(--panel-soft);
  font-size: 0.9rem;
}

.airport-frequency-row strong {
  font-family: "IBM Plex Mono", monospace;
  font-size: 1rem;
  overflow-wrap: anywhere;
}

.empty-state {
  padding: 24px;
}

@media (max-width: 920px) {
  .hero,
  .layout {
    grid-template-columns: 1fr;
  }

  .hero-logo {
    width: min(100%, 280px);
  }
}

@media (max-width: 640px) {
  .shell {
    width: min(100vw - 18px, 100%);
    padding: 18px 0 24px;
  }

  .hero-copy,
  .hero-panel,
  .hero-logo-panel,
  .control-panel,
  .results-panel {
    padding: 18px;
  }

  .form-grid,
  .reference-grid,
  .region-meta,
  .results {
    grid-template-columns: 1fr;
  }

  .summary-bar,
  .program-header,
  .actions,
  .channel-header,
  .channel-footer {
    flex-direction: column;
    align-items: start;
  }

  .actions button,
  .program-header button,
  #apply-button,
  #geo-button,
  #copy-button {
    width: 100%;
    justify-content: center;
  }

  .hero-brand {
    font-size: clamp(1.9rem, 10vw, 2.8rem);
    letter-spacing: 0.12em;
  }

  h1 {
    max-width: none;
    font-size: clamp(1rem, 7vw, 1.5rem);
    line-height: 1.05;
  }

  .hero-text {
    font-size: 0.98rem;
  }

  .hero-pills {
    padding-left: 18px;
  }

  .hero-logo {
    width: min(100%, 220px);
  }

  .channel-frequency {
    font-size: 1.45rem;
  }
}