/* 이동 중 한 손으로 쓰는 도구. 정보 밀도를 낮게 유지한다. */
:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --ink: #14181d;
  --dim: #5b6673;
  --line: #e2e6eb;
  --accent: #1f6feb;
  --safe: #0f7b48;
  --tight: #9a6100;
  --miss: #b3261e;
  --safe-bg: #e6f4ec;
  --tight-bg: #fdf3e0;
  --miss-bg: #fdeceb;
  --tap: 56px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111417;
    --card: #1b2026;
    --ink: #e8ecf1;
    --dim: #98a3b0;
    --line: #2b323a;
    --accent: #6ea8ff;
    --safe: #57d093;
    --tight: #ffc75c;
    --miss: #ff8a80;
    --safe-bg: #16301f;
    --tight-bg: #332609;
    --miss-bg: #34191a;
  }
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; background: var(--bg); color: var(--ink); }
body {
  font: 16px/1.45 -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo",
        "Pretendard", "Malgun Gothic", sans-serif;
  padding: env(safe-area-inset-top) env(safe-area-inset-right)
           env(safe-area-inset-bottom) env(safe-area-inset-left);
  -webkit-text-size-adjust: 100%;
}
.screen { padding: 16px 16px 24px; max-width: 560px; margin: 0 auto; }
[hidden] { display: none !important; }

/* ---------- 홈 ---------- */
.home-head { padding: 24px 0 8px; }
h1 { margin: 0; font-size: 28px; letter-spacing: -0.02em; }
.gps { margin: 6px 0 0; color: var(--dim); font-size: 14px; }
.gps.ok { color: var(--safe); }
.gps.err { color: var(--miss); }
.ask { margin: 28px 0 12px; color: var(--dim); font-size: 15px; }
.places { display: grid; gap: 10px; }

.btn {
  min-height: var(--tap); width: 100%;
  border: 1px solid var(--line); border-radius: 14px;
  background: var(--card); color: var(--ink);
  font-size: 18px; font-weight: 600; cursor: pointer;
}
.btn:active { transform: scale(0.99); }
.btn.ghost { margin-top: 10px; font-weight: 500; color: var(--dim); border-style: dashed; }
.btn.refresh { margin-top: 8px; }
.link {
  display: block; margin: 18px auto 0; padding: 8px;
  background: none; border: 0; color: var(--dim);
  font-size: 13px; text-decoration: underline; cursor: pointer;
}

/* ---------- 결과 ---------- */
.result-head { display: flex; align-items: center; gap: 12px; padding: 8px 0 14px; }
.back {
  min-width: 44px; min-height: 44px;
  border: 0; background: none; color: var(--ink); font-size: 24px; cursor: pointer;
}
.trip { display: flex; flex-direction: column; }
.trip strong { font-size: 17px; }
.fresh { font-size: 13px; color: var(--dim); transition: opacity 0.3s; }
.fresh.stale { opacity: 0.45; }

.banner {
  padding: 12px 14px; margin-bottom: 12px;
  border-radius: 12px; background: var(--tight-bg); color: var(--tight);
  font-size: 15px; font-weight: 600;
}
.composition {
  margin: 0 0 12px; font-size: 13px; color: var(--dim);
}
.composition b { color: var(--ink); font-weight: 600; }
.cards { display: grid; gap: 12px; }

.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 16px; padding: 14px 16px;
  border-left: 5px solid var(--line);
}
.card.SAFE  { border-left-color: var(--safe); }
.card.TIGHT { border-left-color: var(--tight); }
.card.MISS  { border-left-color: var(--miss); opacity: 0.72; }

/* 판독 우선순위: 정류장 이름 > 여유 등급 > 노선번호 > 도착시각 */
.stop-row { display: flex; align-items: baseline; gap: 8px; }
.stop {
  font-size: 19px; font-weight: 700; letter-spacing: -0.01em;
  background: none; border: 0; padding: 0; color: var(--ink);
  text-align: left; text-decoration: underline dotted var(--line) 2px;
  text-underline-offset: 4px; cursor: pointer;
}
.walk { font-size: 14px; color: var(--dim); white-space: nowrap; margin-left: auto; }

.grade {
  display: inline-block; margin: 8px 0 2px; padding: 3px 9px;
  border-radius: 999px; font-size: 13px; font-weight: 700;
}
.grade.SAFE  { background: var(--safe-bg);  color: var(--safe); }
.grade.TIGHT { background: var(--tight-bg); color: var(--tight); }
.grade.MISS  { background: var(--miss-bg);  color: var(--miss); }

.route { font-size: 17px; font-weight: 600; margin: 6px 0 0; }
.route .eta { color: var(--accent); }
.leg { font-size: 14px; color: var(--dim); margin: 6px 0 0; }
.arrive { font-size: 15px; margin: 8px 0 0; font-variant-numeric: tabular-nums; }
.tags { margin: 8px 0 0; font-size: 12px; color: var(--dim); }
.tags span { margin-right: 8px; }

.empty { text-align: center; padding: 48px 16px; color: var(--dim); }
.skeleton {
  height: 116px; border-radius: 16px; border: 1px solid var(--line);
  background: var(--card); animation: pulse 1.2s ease-in-out infinite;
}
@keyframes pulse { 50% { opacity: 0.5; } }