:root {
  --bg: #07111f;
  --panel: #0d1b2a;
  --panel-2: #11243a;
  --line: #20364d;
  --text: #edf5ff;
  --muted: #8fa9c2;
  --accent: #32d296;
  --accent-2: #68a7ff;
  --danger: #ff6b7a;
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; font-family: Inter, Pretendard, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: var(--text); background: radial-gradient(circle at 20% 0%, #123353 0, var(--bg) 35%), var(--bg); }
button, input, select { font: inherit; }
.shell { max-width: 1180px; margin: 0 auto; padding: 42px 22px 60px; }
.topbar { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; margin-bottom: 24px; }
.eyebrow { margin: 0 0 8px; color: var(--accent); font-size: 12px; font-weight: 800; letter-spacing: .16em; }
h1 { margin: 0; font-size: clamp(32px, 5vw, 50px); letter-spacing: -.04em; }
.subtitle { color: var(--muted); margin: 10px 0 0; }
.badge { border: 1px solid var(--line); padding: 9px 13px; border-radius: 999px; font-size: 13px; background: rgba(255,255,255,.03); }
.badge.online { border-color: rgba(50,210,150,.45); color: var(--accent); }
.badge.offline { color: var(--muted); }
.grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
.card { background: rgba(13,27,42,.94); border: 1px solid var(--line); border-radius: 20px; padding: 22px; box-shadow: 0 18px 50px rgba(0,0,0,.16); }
.section-title { display: flex; gap: 13px; align-items: flex-start; margin-bottom: 20px; }
.section-title.between { justify-content: space-between; align-items: center; }
.title-wrap { display: flex; gap: 13px; }
.step { display: inline-grid; place-items: center; min-width: 36px; height: 36px; border-radius: 10px; background: #17324c; color: var(--accent-2); font-weight: 800; }
h2 { font-size: 18px; margin: 1px 0 5px; }
.section-title p { margin: 0; color: var(--muted); font-size: 13px; }
.form-grid { display: grid; gap: 12px; grid-template-columns: 1fr 1fr auto auto; align-items: end; }
.search-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; align-items: end; }
.search-btn { grid-column: span 2; }
label { display: grid; gap: 7px; color: var(--muted); font-size: 12px; font-weight: 700; }
input, select { width: 100%; border: 1px solid var(--line); background: #091827; color: var(--text); border-radius: 11px; padding: 11px 12px; outline: none; }
input:focus, select:focus { border-color: #4c80b3; box-shadow: 0 0 0 3px rgba(104,167,255,.1); }
button { border: 0; border-radius: 11px; padding: 11px 15px; font-weight: 800; cursor: pointer; transition: .16s ease; }
button:hover { transform: translateY(-1px); }
button:disabled { cursor: not-allowed; opacity: .45; transform: none; }
.primary { background: var(--accent); color: #03281c; }
.ghost { background: #17324c; color: #dbeeff; }
.danger { background: rgba(255,107,122,.14); color: #ff9ca6; border: 1px solid rgba(255,107,122,.28); }
.small { padding: 8px 11px; font-size: 12px; }
.message { min-height: 20px; margin-top: 12px; color: var(--muted); font-size: 13px; }
.message.error { color: #ff9ca6; }
.message.success { color: var(--accent); }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 760px; }
th { text-align: left; color: #7893ad; font-size: 11px; letter-spacing: .03em; padding: 11px 9px; border-bottom: 1px solid var(--line); }
td { padding: 14px 9px; border-bottom: 1px solid rgba(32,54,77,.68); font-size: 13px; }
tr.selected { background: rgba(104,167,255,.06); }
.empty { text-align: center; color: var(--muted); padding: 30px; }
.seat-ok { color: var(--accent); font-weight: 800; }
.seat-no { color: #657e95; }
.train-name { font-weight: 800; }
.train-no { color: var(--muted); font-size: 11px; margin-left: 5px; }
.reserve-controls { display: grid; grid-template-columns: 1.2fr .8fr auto auto auto; gap: 12px; align-items: end; }
.status-panel { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 18px; }
.status-panel > div { background: #091827; border: 1px solid var(--line); border-radius: 13px; padding: 14px; }
.label { display: block; font-size: 11px; color: var(--muted); margin-bottom: 4px; }
.reservation-result { margin-top: 16px; border: 1px solid rgba(50,210,150,.35); background: rgba(50,210,150,.08); border-radius: 15px; padding: 16px; }
.reservation-result h3 { margin: 0 0 9px; color: var(--accent); }
.reservation-result p { margin: 5px 0; color: #d6e9f7; font-size: 13px; }
.hidden { display: none; }
footer { padding: 22px 4px 0; color: #6f89a1; font-size: 12px; text-align: center; }
@media (max-width: 900px) {
  .form-grid, .search-grid, .reserve-controls { grid-template-columns: repeat(2, 1fr); }
  .search-btn { grid-column: span 2; }
}
@media (max-width: 600px) {
  .shell { padding: 25px 13px 42px; }
  .topbar { display: block; }
  .badge { display: inline-block; margin-top: 16px; }
  .form-grid, .search-grid, .reserve-controls, .status-panel { grid-template-columns: 1fr; }
  .search-btn { grid-column: auto; }
  .card { padding: 17px; border-radius: 16px; }
}

.debug-box {
  margin-top: 10px;
  padding: 12px;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 10px;
  background: rgba(0,0,0,.22);
  color: var(--muted);
  font-size: 12px;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}
.hidden { display: none !important; }