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

:root {
  --bg:       #F6F5F1;
  --surface:  #FFFFFF;
  --text:     #111111;
  --muted:    #888880;
  --border:   #E4E3DE;
  --blue:     #1F45C3;
  --blue-bg:  rgba(31, 69, 195, 0.07);
  --good:     #16803C;
  --bad:      #C0161A;
  --radius:   13px;
}

body {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }

/* ── Header ── */
header {
  padding: 52px 24px 48px;
  text-align: center;
}

.wordmark {
  display: inline-block;
  position: relative;
  margin-bottom: 12px;
}

.wordmark .route {
  position: absolute;
  top: -20px;
  left: 0; right: 0;
  display: flex;
  justify-content: center;
}

.route svg { opacity: 0.45; }

.wordmark h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 1;
  background: linear-gradient(135deg, #0A1A3A 10%, #1F45C3 65%, #4F78F0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

header p {
  font-size: 0.88rem;
  color: var(--muted);
  max-width: 320px;
  margin: 0 auto;
  line-height: 1.6;
  font-weight: 400;
}

.share-flight-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-top: 14px;
  padding: 5px 12px 5px 10px;
  font-family: 'Space Grotesk', inherit;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 20px;
  cursor: pointer;
  text-decoration: none;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
  letter-spacing: 0.01em;
}

.share-flight-btn:hover {
  color: var(--blue);
  border-color: rgba(31, 69, 195, 0.3);
  background: var(--blue-bg);
}

.share-flight-btn .btn-icon {
  font-size: 0.68rem;
  opacity: 0.7;
}

/* ── Main ── */
main {
  max-width: 540px;
  margin: 0 auto;
  padding: 4px 18px 72px;
}

/* ── Drill-down card ── */
.drill-down {
  position: relative;
  z-index: 2147483646;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-top: 3px solid var(--blue);
  border-radius: var(--radius);
  margin-bottom: 16px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.04), 0 6px 20px rgba(0,0,0,0.05);
  counter-reset: step-num;
}

/* ── Steps ── */
.step {
  position: relative;
  counter-increment: step-num;
  padding: 20px 24px;
  border-top: 1.5px solid var(--border);
}

.step:first-child { border-top: none; }
.step:focus-within { z-index: 2147483646; }

.hidden { display: none; }

@keyframes stepIn {
  0%   { opacity: 0; transform: translateY(10px); }
  65%  { opacity: 1; transform: translateY(-3px); }
  100% { opacity: 1; transform: translateY(0); }
}

.step-reveal { animation: stepIn 0.35s cubic-bezier(0.34, 1.3, 0.64, 1) both; }

.step.active { background: rgba(31, 69, 195, 0.025); }

/* ── Step label ── */
.step label {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 9px;
}

.step label::before {
  content: counter(step-num, decimal-leading-zero);
  font-family: 'Space Mono', ui-monospace, monospace;
  font-size: 0.6rem;
  color: var(--blue);
  opacity: 0.5;
  letter-spacing: 0.03em;
  flex-shrink: 0;
}

.step label span {
  font-size: 0.63rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

/* ── Input ── */
.step .ss-wrap { position: relative; }

.step .ss-input {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.9375rem;
  font-family: 'Space Grotesk', inherit;
  font-weight: 500;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: 9px;
  color: var(--text);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
}

.step .ss-input:focus {
  background: var(--surface);
  border-color: var(--blue);
  box-shadow: 0 0 0 3px var(--blue-bg);
}

.step .ss-input::placeholder {
  color: #BEBDB7;
  font-weight: 400;
}

.step .ss-input.is-filled {
  font-weight: 600;
  background: var(--surface);
}

/* ── Dropdown ── */
.step .ss-list {
  position: absolute;
  top: calc(100% + 4px);
  left: 0; right: 0;
  background: var(--surface);
  border: 1.5px solid var(--blue);
  border-radius: 9px;
  max-height: 220px;
  overflow-y: auto;
  z-index: 2147483647;
  list-style: none;
  padding: 4px 0;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08), 0 16px 40px rgba(0,0,0,0.06);
}

.step .ss-list::-webkit-scrollbar { width: 3px; }
.step .ss-list::-webkit-scrollbar-track { background: transparent; }
.step .ss-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.step .ss-list li {
  padding: 10px 16px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  color: #555;
  transition: background 0.08s, color 0.08s;
}

.step .ss-list li:hover,
.step .ss-list li.hi {
  background: var(--blue-bg);
  color: var(--blue);
}

/* ── Result ── */
@keyframes resultIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.result-in { animation: resultIn 0.3s cubic-bezier(0.34, 1.2, 0.64, 1) both; }

#result {
  position: relative;
  z-index: 1;
}

/* ── Treatment card ── */
.treatment-card {
  display: block;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1.5px solid var(--border);
  background: var(--surface);
  box-shadow: 0 1px 2px rgba(0,0,0,0.04), 0 6px 20px rgba(0,0,0,0.05);
  margin-bottom: 12px;
  transition: box-shadow 0.15s, border-color 0.15s;
}

.treatment-card:hover {
  border-color: #C8C7C2;
  box-shadow: 0 2px 4px rgba(0,0,0,0.06), 0 8px 28px rgba(0,0,0,0.08);
}

.verdict-banner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.verdict-banner.good { background: var(--good); color: #FFFFFF; }
.verdict-banner.bad  { background: var(--bad);  color: #FFFFFF; }

.verdict-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  background: rgba(255,255,255,0.2);
  border-radius: 50%;
  font-size: 0.7rem;
  flex-shrink: 0;
}

.card-body { padding: 18px 22px; }

.treatment-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.entity-iata {
  font-family: 'Space Mono', ui-monospace, monospace;
  font-size: 0.62rem;
  color: var(--muted);
  letter-spacing: 0.06em;
  min-width: 28px;
}

.entity-name {
  font-weight: 700;
  font-size: 0.9375rem;
  flex: 1;
  letter-spacing: -0.01em;
}

.badge {
  font-size: 0.63rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 5px;
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.badge-neutral { background: #F1F0EC; color: #666; }

.treatment-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-bottom: 10px;
}

.treatment-notes {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.7;
}

.treatment-verified {
  font-size: 0.67rem;
  color: #CCC;
  margin-top: 10px;
}

/* ── Detail page headers ── */
.page-header { margin-bottom: 28px; }

.back {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--muted);
  margin-bottom: 12px;
  transition: color 0.1s;
}

.back:hover { color: var(--text); }

.page-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.page-header .subtitle {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 4px;
}

.no-results, .loading {
  color: var(--muted);
  text-align: center;
  padding: 48px 0;
  font-size: 0.875rem;
}

@media (max-width: 520px) {
  header { padding: 40px 18px 36px; }
  .wordmark h1 { font-size: 2rem; }
  main { padding: 4px 12px 56px; }
  .step { padding: 18px 18px; }
}