:root {
  --ink: #10231c;
  --paper: #f4efe4;
  --card: #fffaf1;
  --line: #d9d0bf;
  --accent: #c45c26;
  --teal: #1f6f5b;
  --muted: #6b6458;
  --ok: #1f6f5b;
  --warn: #9a3b2f;
  --shadow: 0 10px 30px rgba(16, 35, 28, 0.08);
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: "Pretendard", "Noto Sans KR", "Apple SD Gothic Neo", sans-serif;
  color: var(--ink);
  background: radial-gradient(1200px 600px at 10% -10%, #ffe7c8 0%, transparent 50%),
              radial-gradient(900px 500px at 100% 0%, #c9e7dc 0%, transparent 46%),
              var(--paper);
}
.bg-grid {
  position: fixed; inset: 0; pointer-events: none; opacity: 0.18;
  background-image: linear-gradient(#cfc4b0 1px, transparent 1px),
                    linear-gradient(90deg, #cfc4b0 1px, transparent 1px);
  background-size: 28px 28px;
}
.top, main, footer { position: relative; max-width: 1100px; margin: 0 auto; padding: 20px; }
.top { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; }
.brand { display: flex; gap: 14px; align-items: center; }
.mark {
  display: grid; place-items: center; width: 56px; height: 56px;
  background: var(--ink); color: #f4efe4; font-weight: 800; letter-spacing: 0.08em;
  border-radius: 14px 4px 14px 4px;
}
h1 { margin: 0; font-size: 28px; letter-spacing: -0.03em; }
.brand p, .hint, footer { color: var(--muted); }
.legacy { color: var(--teal); font-size: 13px; }
.panel, .toolbar, .deals, .heatmap {
  background: var(--card); border: 1px solid var(--line); border-radius: 18px;
  padding: 18px; box-shadow: var(--shadow); margin-bottom: 16px;
}
.lbl { display: block; font-size: 12px; font-weight: 700; color: var(--muted); margin: 8px 0; }
label { display: block; font-size: 13px; font-weight: 600; }
input, select, button {
  font: inherit; color: inherit;
}
input[type="date"], input[type="number"], input[type="text"], #extra-dests, select {
  width: 100%; margin-top: 6px; padding: 10px 12px; border: 1px solid var(--line);
  border-radius: 10px; background: #fff;
}
.grid-2, .grid-3 { display: grid; gap: 12px; margin: 12px 0; }
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: 1fr 1fr 1.4fr; align-items: end; }
.chips, .origins { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.check-chip { display: inline-flex; align-items: center; gap: 6px; font-weight: 700; }
.check-chip input { margin: 0; }
.other-air-wrap {
  display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px; margin-top: 10px;
}
.other-air-wrap.hidden { display: none; }
.air-pick { width: 100%; margin-top: 6px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.chip {
  border: 1px solid var(--line); background: #fff; border-radius: 999px;
  padding: 7px 12px; cursor: pointer; font-size: 13px;
}
.chip.on { background: var(--ink); color: #fff; border-color: var(--ink); }
.chip input { accent-color: var(--accent); }
.checkline { display: flex; align-items: center; gap: 8px; padding-bottom: 8px; }
.actions { display: flex; gap: 14px; align-items: center; margin-top: 8px; }
#search-btn, #retry-btn {
  background: var(--accent); color: #fff; border: 0; border-radius: 12px;
  padding: 12px 18px; font-weight: 800; cursor: pointer;
}
#retry-btn { background: var(--teal); }
#search-btn:disabled { opacity: 0.5; cursor: wait; }
#retry-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.hidden { display: none !important; }
.progress { height: 8px; background: #eee6d8; border-radius: 99px; overflow: hidden; margin-bottom: 10px; }
#progress-bar { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--teal), var(--accent)); }
.tools { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.tools select { width: auto; }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 14px 16px;
  margin: 10px 0; display: grid; grid-template-columns: 140px 1fr auto; gap: 12px; align-items: center;
}
.price { font-size: 22px; font-weight: 800; color: var(--teal); white-space: nowrap; }
.price small { display: block; font-size: 11px; color: var(--muted); font-weight: 600; }
.meta { font-size: 13px; color: var(--muted); }
.when { color: var(--ink); font-weight: 800; }
.route { font-weight: 800; font-size: 16px; }
.links { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.links a {
  font-size: 12px; text-decoration: none; color: var(--ink); border: 1px solid var(--line);
  border-radius: 999px; padding: 4px 8px; background: #f7f1e6;
}
.group-title { margin: 22px 0 8px; font-size: 16px; }
.heat {
  display: flex; gap: 6px; flex-wrap: wrap;
}
.heat b {
  display: block; font-size: 11px; color: inherit; font-weight: 800; letter-spacing: 0.02em;
}
.heat i {
  display: inline-flex; flex-direction: column; align-items: center; min-width: 86px;
  justify-content: center; padding: 8px 10px; border-radius: 10px; font-style: normal;
  font-size: 12px; font-weight: 800; line-height: 1.25;
}
.deal-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 8px; }
.deal-grid a {
  display: block; padding: 10px 12px; border-radius: 12px; text-decoration: none;
  color: var(--ink); background: #fff; border: 1px solid var(--line); font-size: 13px;
}
footer { font-size: 12px; padding-bottom: 40px; }
@media (max-width: 800px) {
  .grid-2, .grid-3, .card { grid-template-columns: 1fr; }
  .top { flex-direction: column; align-items: flex-start; }
}

h1 .ver, #app-ver { font-size: 12px; font-weight: 600; color: var(--muted); margin-left: 8px; letter-spacing: 0; vertical-align: middle; }

.card { grid-template-columns: 180px 1fr; align-items: start; padding: 16px 18px; }
.price { font-size: 26px; }
.price small { display: block; font-size: 12px; font-weight: 700; margin-top: 4px; }
.route { font-size: 18px; margin-bottom: 4px; }
.when-line { font-size: 15px; margin-bottom: 8px; }
.legs { display: grid; gap: 6px; }
.leg { display: grid; grid-template-columns: 52px 78px 1fr; gap: 8px; align-items: center; background: #f7f1e6; border-radius: 10px; padding: 8px 10px; font-size: 13px; font-weight: 700; }
.leg-k { color: var(--muted); font-size: 12px; }
.badge { display: inline-block; text-align: center; border-radius: 999px; padding: 3px 8px; font-size: 12px; font-weight: 800; }
.badge.direct { background: var(--teal); color: #fff; }
.badge.via { background: var(--accent); color: #fff; }
.dur { font-size: 15px; font-weight: 800; color: var(--ink); }
.dep { font-size: 18px; font-weight: 800; color: var(--ink); }
.dur-inline { font-size: 13px; font-weight: 700; color: var(--muted); }
@media (max-width: 800px) { .leg { grid-template-columns: 52px 1fr; } }