/* 스마트 수압계 감시 시스템 - USOL 스타일 */
:root {
  --primary: #00b4d8;
  --primary-dark: #0096c7;
  --primary-light: #caf0f8;
  --primary-bg: #e0f7fa;
  --accent: #0077b6;
  --danger: #ef4444;
  --danger-light: #fee2e2;
  --success: #22c55e;
  --success-light: #dcfce7;
  --warning: #f59e0b;
  --warning-light: #fef3c7;
  --ink: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
  --bg: #f0f9ff;
  --card: #ffffff;
  --radius: 14px;
  --shadow: 0 2px 12px rgba(0,180,216,0.08);
}
* { box-sizing: border-box; margin: 0; }
body { font-family: 'Pretendard', system-ui, -apple-system, 'Segoe UI', sans-serif; color: var(--ink); background: var(--bg); }
a { color: inherit; text-decoration: none; }

/* Layout */
.container { max-width: 1200px; margin: 0 auto; padding: 16px; }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 12px; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; }
.grid-4 { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.flex { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.flex-between { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; }
.gap-12 { gap: 12px; }
.mt-12 { margin-top: 12px; }
.mt-8 { margin-top: 8px; }
.mb-12 { margin-bottom: 12px; }
.mb-8 { margin-bottom: 8px; }

/* Nav - 시안 그라데이션 */
.nav { position: sticky; top: 0; z-index: 100; background: linear-gradient(135deg, #0096c7 0%, #00b4d8 50%, #48cae4 100%); border-bottom: none; box-shadow: 0 2px 12px rgba(0,150,199,0.3); }
.nav .inner { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; padding: 10px 16px; }
.nav .brand { font-weight: 800; font-size: 16px; color: #fff; letter-spacing: -0.5px; }
.nav .menu { display: flex; gap: 2px; flex-wrap: wrap; }
.nav .menu a { padding: 7px 14px; border-radius: 10px; font-size: 13px; font-weight: 600; color: rgba(255,255,255,0.85); transition: all .2s; }
.nav .menu a:hover { background: rgba(255,255,255,0.2); color: #fff; }
.nav .menu a.active { background: rgba(255,255,255,0.95); color: var(--primary-dark); }
.nav .alarm-badge { background: var(--danger); color: #fff; border-radius: 99px; padding: 3px 10px; font-size: 11px; font-weight: 700; animation: pulse 2s infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:0.7} }

/* Card */
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); }
.card-header { font-weight: 700; font-size: 15px; margin-bottom: 12px; color: var(--ink); }
.card-header-primary { font-weight: 700; font-size: 15px; margin-bottom: 12px; color: var(--primary-dark); }

/* Summary cards (상단 요약) */
.summary-card { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); color: #fff; border: none; text-align: center; padding: 20px 16px; }
.summary-card .sum-label { font-size: 12px; font-weight: 600; opacity: 0.85; }
.summary-card .sum-value { font-size: 32px; font-weight: 900; margin: 4px 0; }
.summary-card.green { background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%); }
.summary-card.red { background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%); }
.summary-card.orange { background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%); }

/* Status badge */
.badge { display: inline-flex; align-items: center; gap: 4px; padding: 4px 10px; border-radius: 99px; font-size: 12px; font-weight: 700; }
.badge-online { background: var(--success-light); color: #16a34a; }
.badge-offline { background: var(--danger-light); color: var(--danger); }
.badge-warn { background: var(--warning-light); color: #b45309; }
.badge-mode { background: var(--primary-light); color: var(--primary-dark); font-size: 11px; }
.badge-realtime { background: #dbeafe; color: #2563eb; }
.badge-logging { background: #fef3c7; color: #92400e; }

/* Device card - USOL 앱 스타일 */
.device-card { cursor: pointer; transition: all .2s; border: 2px solid transparent; position: relative; overflow: hidden; }
.device-card:hover { border-color: var(--primary); box-shadow: 0 4px 16px rgba(0,180,216,0.15); transform: translateY(-2px); }
.device-card .card-top { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 12px; }
.device-card .dev-name { font-weight: 800; font-size: 16px; color: var(--ink); }
.device-card .dev-sub { font-size: 12px; color: var(--muted); margin-top: 2px; }
.device-card .dev-badges { display: flex; gap: 4px; align-items: center; }

/* 센서값 그리드 */
.sensor-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; margin-top: 8px; }
.sensor-item { text-align: center; padding: 10px 4px; background: var(--bg); border-radius: 10px; }
.sensor-item .sensor-label { font-size: 11px; color: var(--muted); font-weight: 600; margin-bottom: 4px; }
.sensor-item .sensor-value { font-size: 20px; font-weight: 900; color: var(--primary-dark); }
.sensor-item .sensor-unit { font-size: 11px; color: var(--muted); font-weight: 600; }
.sensor-item.highlight { background: linear-gradient(135deg, var(--primary-light) 0%, #e0f2fe 100%); }
.sensor-item.highlight .sensor-value { color: var(--accent); }

/* 배터리 표시 */
.battery-bar { display: flex; align-items: center; gap: 4px; }
.battery-icon { width: 28px; height: 14px; border: 2px solid; border-radius: 3px; position: relative; display: inline-block; }
.battery-icon::after { content: ''; position: absolute; right: -5px; top: 3px; width: 3px; height: 6px; background: currentColor; border-radius: 0 2px 2px 0; }
.battery-fill { height: 100%; border-radius: 1px; transition: width .3s; }
.battery-pct { font-size: 12px; font-weight: 700; }
.battery-good { color: var(--success); }
.battery-mid { color: var(--warning); }
.battery-low { color: var(--danger); }

/* 신호강도 */
.rssi-bars { display: flex; gap: 1px; align-items: flex-end; height: 14px; }
.rssi-bars span { width: 3px; background: #cbd5e1; border-radius: 1px; }
.rssi-bars span.active { background: var(--success); }

/* Value display */
.value-box { text-align: center; padding: 8px; }
.value-label { font-size: 11px; color: var(--muted); font-weight: 600; }
.value-num { font-size: 24px; font-weight: 900; color: var(--ink); }
.value-unit { font-size: 12px; color: var(--muted); font-weight: 600; }
.value-sm { font-size: 16px; }

/* 검색바 */
.search-bar { display: flex; gap: 8px; align-items: center; }
.search-bar input { flex: 1; padding: 10px 14px; border: 2px solid var(--border); border-radius: 12px; font-size: 14px; background: #fff; transition: border-color .2s; }
.search-bar input:focus { border-color: var(--primary); outline: none; box-shadow: 0 0 0 3px rgba(0,180,216,0.1); }

/* Table */
.table { width: 100%; border-collapse: collapse; font-size: 13px; }
.table th, .table td { padding: 10px 12px; border-bottom: 1px solid var(--border); text-align: left; }
.table th { background: var(--primary-light); font-weight: 700; color: var(--primary-dark); font-size: 12px; position: sticky; top: 0; z-index: 1; }
.table tr:hover td { background: #f0f9ff; }

/* Forms */
input, select, textarea { padding: 8px 12px; border: 1.5px solid var(--border); border-radius: 10px; font-size: 13px; background: #fff; color: var(--ink); transition: all .2s; }
input:focus, select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0,180,216,0.1); }
label { font-size: 13px; font-weight: 600; color: var(--muted); }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 4px; padding: 8px 16px; border: none; border-radius: 10px; font-size: 13px; font-weight: 700; cursor: pointer; transition: all .2s; }
.btn-primary { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); color: #fff; box-shadow: 0 2px 8px rgba(0,180,216,0.3); }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(0,180,216,0.4); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-outline { background: transparent; border: 1.5px solid var(--border); color: var(--ink); }
.btn-outline:hover { background: var(--primary-light); border-color: var(--primary); color: var(--primary-dark); }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-success { background: var(--success); color: #fff; }

/* Helpers */
.text-muted { color: var(--muted); }
.text-sm { font-size: 12px; }
.text-danger { color: var(--danger); }
.text-success { color: var(--success); }
.text-primary { color: var(--primary-dark); }
.fw-bold { font-weight: 700; }
.hidden { display: none !important; }

/* Map container */
#map { width: 100%; height: 500px; border-radius: var(--radius); border: 1px solid var(--border); }

/* Canvas chart */
.chart-wrap { position: relative; }
.chart-tip { position: absolute; background: var(--ink); color: #fff; padding: 6px 10px; border-radius: 8px; font-size: 12px; pointer-events: none; z-index: 10; display: none; }

/* 설정 탭 */
.tab-bar { display: flex; gap: 4px; border-bottom: 2px solid var(--border); padding-bottom: 0; }
.tab-bar button { padding: 10px 18px; border: none; background: none; font-weight: 700; font-size: 13px; color: var(--muted); cursor: pointer; border-bottom: 3px solid transparent; margin-bottom: -2px; transition: all .2s; }
.tab-bar button:hover { color: var(--primary); }
.tab-bar button.active { color: var(--primary-dark); border-bottom-color: var(--primary); }
.tab-panel { display: none; padding: 16px 0; }
.tab-panel.active { display: block; }

/* 설정 그리드 */
.config-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.config-section { background: var(--bg); border-radius: 12px; padding: 16px; }
.config-section .config-title { font-weight: 700; font-size: 14px; color: var(--primary-dark); margin-bottom: 12px; display: flex; align-items: center; gap: 6px; }

/* 모드 선택 */
.mode-selector { display: flex; gap: 8px; margin: 8px 0; }
.mode-btn { flex: 1; padding: 14px; text-align: center; border: 2px solid var(--border); border-radius: 12px; cursor: pointer; transition: all .2s; background: #fff; }
.mode-btn:hover { border-color: var(--primary); }
.mode-btn.active { border-color: var(--primary); background: var(--primary-light); }
.mode-btn .mode-icon { font-size: 24px; margin-bottom: 4px; }
.mode-btn .mode-name { font-weight: 700; font-size: 14px; }
.mode-btn .mode-desc { font-size: 11px; color: var(--muted); }

/* 드롭다운 스타일 */
.interval-select { width: 100%; padding: 10px 14px; border: 1.5px solid var(--border); border-radius: 10px; font-size: 14px; font-weight: 600; background: #fff; color: var(--ink); }

/* Token box */
.token-box { font-family: monospace; font-size: 12px; word-break: break-all; background: var(--primary-light); padding: 12px; border-radius: 10px; margin-top: 8px; border: 1px solid var(--primary); }

/* Form grid */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

/* Footer info bar */
.info-bar { display: flex; justify-content: space-between; align-items: center; padding: 6px 0; margin-top: 8px; border-top: 1px solid var(--border); }
.info-bar .info-item { font-size: 11px; color: var(--muted); }

/* Responsive */
@media (max-width: 768px) {
  .container { padding: 8px; }
  .grid-2, .grid-4 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: repeat(3, 1fr); gap: 6px; }
  .summary-card { padding: 10px 8px; }
  .summary-card .sum-label { font-size: 10px; }
  .summary-card .sum-value { font-size: 20px; }
  .sensor-grid { grid-template-columns: 1fr 1fr 1fr; }
  .value-num { font-size: 20px; }
  #map { height: 300px; }
  .nav .menu { gap: 1px; }
  .nav .menu a { padding: 4px 6px; font-size: 11px; }
  .nav .brand { font-size: 13px; }
  .nav .inner { padding: 8px 10px; }
  .config-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .search-bar input { font-size: 12px; }
  .mb-12 { margin-bottom: 8px; }
}

/* Print */
@media print {
  .nav, .btn, .no-print { display: none !important; }
  body { background: #fff; }
  .card { border: 1px solid #ddd; break-inside: avoid; box-shadow: none; }
}