:root{
  --bg:#0b0d12;
  --panel:#141823;
  --text:#e6e8ef;
  --muted:#9aa3b2;
  --primary:#3e8bff;
  --danger:#ff5c7a;
  --border:#242b3a;

  /* JSON/코드 박스 전용 (다크 기본값) */
  --code-bg: #0f1320;
  --code-fg: #e6e8ef;
  --code-border: #242b3a;
}

*{ box-sizing:border-box; }
html, body{ height:100%; }
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", sans-serif;
  color:var(--text);
  background:linear-gradient(180deg,#0b0d12, #0f1320 40%, #0b0d12 100%);
}

.app-header, .app-footer{ padding:16px clamp(16px, 4vw, 32px); background:transparent; }
.app-header h1{ margin:0; font-size: clamp(18px, 2.6vw, 28px); letter-spacing:.2px; }

.container{ max-width:1100px; margin:0 auto; padding:0 clamp(12px, 3vw, 24px) 32px; }

.card{
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:14px;
  padding:clamp(14px, 3vw, 22px);
  margin:14px 0;
  box-shadow:0 6px 18px rgba(0,0,0,.35);
}
.card h2{ margin:0 0 12px 0; font-size:clamp(16px, 2.2vw, 22px); }

.form-row{ display:flex; flex-direction:column; gap:8px; margin-bottom:14px; }
label{ color:var(--muted); font-size:14px; }

input[type="text"], input[type="number"], select{
  color:var(--text);
  background:#0f1320;
  border:1px solid var(--border);
  border-radius:10px;
  padding:10px 12px;
  outline:none;
}
input[readonly]{ opacity:.8; cursor:not-allowed; }

.help, .muted{ color:var(--muted); font-size:12px; }

/* ★ PC 3열 그리드 */
.grid-3{
  display:grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap:14px 18px;
}
.full-row{ grid-column: 1 / -1; }

/* JSON 미리보기 */
.json-preview{
  white-space: pre;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--code-bg);
  color: var(--code-fg);
  border:1px dashed var(--border);
  border-radius:10px;
  padding:12px;
  margin-top:8px;
  overflow:auto;
  max-height: 320px;
}
.is-hidden{ display:none !important; }

.actions{ display:flex; align-items:center; gap:12px; }
button{
  appearance:none; border:0; border-radius:12px; padding:12px 18px; cursor:pointer; font-weight:600;
  color:white; background:#2a3246;
}
button.primary{ background:linear-gradient(180deg, #478bff, #3c6fff); box-shadow:0 8px 20px rgba(62,139,255,.35); }
button:active{ transform: translateY(1px); }
.status{ font-size:14px; color:var(--muted); }
.status.error{ color:var(--danger); }

/* ★ 지도 박스 스타일 */
.map-box{
  margin-top:12px;
  border:1px solid var(--border);
  border-radius:12px;
  overflow:hidden;
  background:#0f1320;
}
.map-box iframe{
  width:100%;
  height:320px;
  border:0;
  display:block;
}
.map-meta{
  font-size:16px;
  color:var(--muted);
  padding:8px 10px;
  border-top:1px dashed var(--border);
}
.map-meta .map-line { margin: 4px 0; }
.map-meta .label { color: var(--text); font-weight:600; }

/* 상태 표시 칩 */
.status-chip{
  display:inline-block;
  padding:2px 8px;
  border-radius:999px;
  font-weight:700;
  font-size:16px;
  background:#2a3246;
  color:#fff;
}
.status-chip.ok{ background:#1c7c54; }      /* 동작중 */
.status-chip.warn{ background:#a97600; }    /* 관성정지 */
.status-chip.danger{ background:#b23a48; }  /* 긴급정지 */

/* 반응형 */
@media (max-width: 980px){
  .grid-3{ grid-template-columns: 1fr; }
  .actions{ flex-direction:column; align-items:stretch; }
  button{ width:100%; }
  .map-box iframe{ height:240px; }
}

@media (prefers-color-scheme: light){
  :root{
    --bg:#ffffff; --panel:#ffffff; --text:#0e1220; --muted:#5d677b; --primary:#2257d8; --danger:#c93351; --border:#e5e7ef;
  }
  body{ background:#f6f8fc; }
  input[type="text"], input[type="number"], select{ background:#fff; }
  .card{ box-shadow:0 10px 22px rgba(19,35,78,.08); }
  .map-box{ background:#fff; }
}

/* ▼ JSON 미리보기 접기/펼치기 헤더 */
.collapse-header{
  display:flex; align-items:center; justify-content:space-between;
  margin-top:12px; margin-bottom:6px;
}
button.ghost{
  background:transparent; color:var(--text);
  border:1px solid var(--border); box-shadow:none;
  padding:8px 12px; border-radius:10px; font-weight:600; cursor:pointer;
}
button.ghost:active{ transform: translateY(1px); }

/* 화살표(▾) 회전 애니메이션 */
.chev{ display:inline-block; transition: transform .2s ease; margin-right:6px; }
#togglePreview[aria-expanded="false"] .chev{ transform: rotate(-90deg); }
.level-value{
  display:inline-block;
  min-width:64px;
  font-variant-numeric: tabular-nums;
  color:var(--text);
  font-weight:700;
}
.level-unit{
  color:var(--muted);
}

.update-row{
  margin:0 0 14px 0;
  padding:10px 12px;
  border:1px dashed var(--border);
  border-radius:12px;
  background:#0f1320;
}
.level-line{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}
.level-badge{
  display:inline-flex;
  align-items:baseline;
  gap:4px;
  padding:4px 10px;
  border-radius:999px;
  background:rgba(62,139,255,.12);
  border:1px solid rgba(62,139,255,.28);
}
.level-time{
  display:inline-block;
  font-variant-numeric:tabular-nums;
  font-weight:600;
}
.level-sep{
  color:var(--muted);
  margin:0 4px;
}
.level-pulse{ animation: levelPulse .9s ease; }
.time-pulse{ animation: levelFade .9s ease; }
@keyframes levelPulse{
  0% { transform:scale(1); box-shadow:0 0 0 rgba(62,139,255,0); }
  35% { transform:scale(1.08); box-shadow:0 0 0 10px rgba(62,139,255,.12); }
  100% { transform:scale(1); box-shadow:0 0 0 rgba(62,139,255,0); }
}
@keyframes levelFade{
  0% { opacity:.45; }
  100% { opacity:1; }
}
@media (prefers-color-scheme: light){
  .update-row{ background:#fff; }
}

/* 명령 버튼/슬라이더 UI */
.command-panel{
  display:flex;
  flex-direction:column;
  gap:18px;
}
.mode-buttons{
  display:grid;
  grid-template-columns:repeat(3, minmax(0, 1fr));
  gap:12px;
}
.mode-btn{
  min-height:74px;
  font-size:clamp(16px, 2vw, 20px);
  border:1px solid var(--border);
  background:#2a3246;
  box-shadow:none;
  position:relative;
  overflow:hidden;
}
.mode-btn.danger{ background:rgba(178,58,72,.32); }
.mode-btn.warn{ background:rgba(169,118,0,.32); }
.mode-btn.ok{ background:rgba(28,124,84,.32); }
.mode-btn.is-active{
  border-color:rgba(255,255,255,.72);
  box-shadow:0 0 0 3px rgba(255,255,255,.12), 0 12px 28px rgba(0,0,0,.25);
  transform:translateY(-1px);
}
.mode-btn.is-active::after{
  content:'선택됨';
  position:absolute;
  right:10px;
  bottom:8px;
  font-size:11px;
  color:rgba(255,255,255,.88);
}
.slider-grid{
  display:grid;
  grid-template-columns:repeat(2, minmax(0,1fr));
  gap:14px;
}
.control-card{
  border:1px solid var(--border);
  border-radius:14px;
  padding:16px;
  background:#0f1320;
}
.control-card.is-disabled{
  opacity:.52;
}
.control-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-bottom:12px;
}
.control-head strong{
  color:var(--text);
  font-size:16px;
  font-variant-numeric:tabular-nums;
}
.range-control{
  width:100%;
  accent-color:var(--primary);
  cursor:pointer;
}
.range-control:disabled{
  cursor:not-allowed;
}
.range-meta{
  display:flex;
  justify-content:space-between;
  color:var(--muted);
  font-size:12px;
  margin-top:8px;
}
@media (max-width: 760px){
  .mode-buttons,
  .slider-grid{ grid-template-columns:1fr; }
  .mode-btn{ min-height:60px; }
}
@media (prefers-color-scheme: light){
  .control-card{ background:#fff; }
  .mode-btn.is-active{ border-color:rgba(14,18,32,.55); box-shadow:0 0 0 3px rgba(34,87,216,.12), 0 12px 24px rgba(19,35,78,.10); }
}