:root {
  --bg: #f5f9ff;
  --bg2: #eaf3ff;
  --card: #ffffff;
  --muted: #64748b;
  --text: #0f2741;
  --accent: #0ea5e9;
  --accent-dark: #0284c7;
  --border: #e2e8f0;
  --low: #16a34a;
  --medium: #d97706;
  --high: #dc2626;
  --unknown: #94a3b8;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: linear-gradient(180deg, var(--bg2) 0%, var(--bg) 38%);
  color: var(--text);
  line-height: 1.55;
  min-height: 100vh;
}
header { text-align: center; padding: 3rem 1rem 0.5rem; }
header h1 { margin: 0; font-size: 2.1rem; letter-spacing: -0.02em; }
.tagline { color: var(--muted); max-width: 44rem; margin: 0.85rem auto 0; font-size: 1.02rem; }
.tagline strong { color: var(--text); }
main { max-width: 44rem; margin: 0 auto; padding: 1rem; }
footer { text-align: center; color: var(--muted); font-size: 0.8rem; padding: 2.5rem 1rem; }

.card {
  background: var(--card);
  border-radius: 16px;
  padding: 1.5rem;
  margin-bottom: 1rem;
  border: 1px solid var(--border);
  box-shadow: 0 6px 24px rgba(15, 39, 65, 0.06);
}
h2 { margin-top: 0; font-size: 1.2rem; }
h3 { margin: 0 0 0.25rem; font-size: 1.05rem; }

input, button {
  font: inherit;
  padding: 0.72rem 0.85rem;
  border-radius: 10px;
  border: 1px solid #cbd5e1;
  background: #fff;
  color: var(--text);
}
input::placeholder { color: #94a3b8; }
input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.15); }
button {
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  border: none;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(14, 165, 233, 0.3);
}
button:hover { background: var(--accent-dark); }
button:disabled { opacity: 0.55; cursor: default; box-shadow: none; }

form { display: flex; flex-direction: column; gap: 0.6rem; }
.grid { display: grid; grid-template-columns: 1.2fr 0.9fr 0.9fr auto; gap: 0.6rem; }
@media (max-width: 560px) { .grid { grid-template-columns: 1fr; } }

.legend {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 1rem;
  margin-top: 0.8rem; padding-top: 0.7rem; border-top: 1px solid var(--border);
  font-size: 0.85rem; color: var(--muted);
}
.legend-title { font-weight: 700; color: var(--text); }
.legend-item { display: inline-flex; align-items: center; gap: 0.35rem; }
.legend-item strong { color: var(--text); }
.dot { width: 0.7rem; height: 0.7rem; border-radius: 999px; background: var(--unknown); display: inline-block; }
.dot.LOW { background: var(--low); }
.dot.MEDIUM { background: var(--medium); }
.dot.HIGH { background: var(--high); }
.plain { color: var(--text); margin: 0.1rem 0 0.4rem; font-weight: 600; }
.edge {
  margin: 0.75rem 0 0; padding: 0.6rem 0.8rem;
  background: #fff7ed; border: 1px solid #fed7aa; border-radius: 8px;
  color: #9a3412; font-size: 0.9rem;
}
.tg-row { display: flex; align-items: center; gap: 0.7rem; margin-top: 0.7rem; }
.tg-row .or { color: var(--muted); font-size: 0.85rem; }
.tg-btn {
  flex: 1; background: #229ED9; color: #fff; font-weight: 700;
  border: none; border-radius: 8px; padding: 0.7rem 0.9rem; cursor: pointer;
  box-shadow: 0 2px 8px rgba(34, 158, 217, 0.3);
}
.tg-btn:hover { background: #1c8ec2; }
.tg-btn:disabled { opacity: 0.55; cursor: default; }

.why { margin-top: 1.2rem; }
.why h2 { margin-bottom: 0.2rem; }
.why-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.7rem; margin-top: 0.7rem; }
@media (max-width: 560px) { .why-grid { grid-template-columns: 1fr; } }
.why-card {
  background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 0.8rem 0.9rem;
}
.why-card .ic { font-size: 1.3rem; }
.why-card h3 { font-size: 0.98rem; margin: 0.3rem 0 0.2rem; }
.why-card p { color: var(--muted); font-size: 0.86rem; margin: 0; }
.compare { width: 100%; border-collapse: collapse; margin-top: 0.7rem; font-size: 0.88rem; }
.compare th, .compare td { text-align: left; padding: 0.5rem 0.6rem; border-bottom: 1px solid var(--border); }
.compare th { color: var(--muted); font-weight: 600; }
.compare .us { color: var(--accent-dark); font-weight: 700; }
.compare .them { color: var(--muted); }

.hidden { display: none; }
.error { color: var(--high); min-height: 1.2em; margin: 0.4rem 0 0; font-size: 0.9rem; }
.hint { color: var(--muted); font-size: 0.82rem; }

.result-head {
  display: flex; justify-content: space-between; align-items: center; gap: 0.5rem;
  padding: 0.2rem 0 0.7rem 0.7rem; margin-bottom: 0.5rem;
  border-bottom: 1px solid var(--border); border-left: 5px solid var(--unknown);
}
.result-head.LOW { border-left-color: var(--low); }
.result-head.MEDIUM { border-left-color: var(--medium); }
.result-head.HIGH { border-left-color: var(--high); }
.flight-no { font-weight: 700; font-size: 1.15rem; }
.badge {
  font-size: 0.78rem; font-weight: 700; padding: 0.2rem 0.65rem;
  border-radius: 999px; background: var(--unknown); color: #fff;
}
.badge.LOW { background: var(--low); }
.badge.MEDIUM { background: var(--medium); }
.badge.HIGH { background: var(--high); }
.route { color: var(--text); font-size: 1.05rem; letter-spacing: 0.5px; margin: 0.35rem 0 0.15rem; }
.reason { color: var(--text); margin: 0.55rem 0; }
.meta { color: var(--muted); font-size: 0.85rem; margin: 0.25rem 0; }
.stat {
  margin: 0.75rem 0 0;
  padding: 0.6rem 0.8rem;
  background: #eff6ff;
  border: 1px solid #dbeafe;
  border-radius: 9px;
  font-size: 0.9rem;
  color: var(--text);
}
.stat strong { color: var(--accent-dark); }

.subscribe {
  margin-top: 1.25rem; padding-top: 1.25rem; border-top: 1px dashed var(--border);
}
.subscribe.done form { display: none; }
.msg { min-height: 1.2em; margin: 0.5rem 0 0; font-size: 0.9rem; color: var(--high); }
.msg.ok { color: var(--low); }