/* ── 기본 ─────────────────────────────────────────────────── */
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Segoe UI', sans-serif; background: #f0f2f5; color: #222; }

/* ── 네비게이션 ──────────────────────────────────────────── */
nav {
  background: #1a3a5c; color: #fff;
  display: flex; justify-content: space-between; align-items: center;
  padding: 0 24px; height: 56px;
  position: sticky; top: 0; z-index: 100;
}
.nav-brand  { font-size: 1.1rem; font-weight: 700; letter-spacing: -0.3px; }
.nav-links  { display: flex; align-items: center; gap: 20px; }
.nav-links a { color: #cde; text-decoration: none; font-size: .9rem; }
.nav-links a.active { color: #fff; font-weight: 600; border-bottom: 2px solid #4da; }
.nav-user   { color: #aac; font-size: .85rem; }
.btn-logout { background: #e74c3c; color: #fff !important; padding: 4px 12px;
              border-radius: 4px; font-size: .82rem !important; }

/* ── 메인 콘텐츠 ─────────────────────────────────────────── */
main { max-width: 1400px; margin: 0 auto; padding: 24px 16px; }
.page-header { display: flex; align-items: center; gap: 16px; margin-bottom: 20px; }
.page-header h2 { font-size: 1.3rem; color: #1a3a5c; }
.refresh-info, .sub-text { font-size: .85rem; color: #888; }

/* ── 현장 탭 ─────────────────────────────────────────────── */
.site-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px; }
.tab-btn {
  padding: 6px 16px; border: 1px solid #ccc; border-radius: 20px;
  background: #fff; cursor: pointer; font-size: .88rem; color: #555;
  transition: all .15s;
}
.tab-btn.active { background: #1a3a5c; color: #fff; border-color: #1a3a5c; }

/* ── 센서 카드 ───────────────────────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.sensor-card {
  background: #fff; border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,.08);
  padding: 16px; transition: transform .15s;
  cursor: pointer;
}
.sensor-card:hover { transform: translateY(-2px); box-shadow: 0 4px 16px rgba(0,0,0,.15); }
.card-header { margin-bottom: 14px; }
.card-title  { display: flex; align-items: center; gap: 8px; margin-bottom: 4px; }
.card-label  { font-weight: 700; font-size: 1rem; }
.card-site   { font-size: .8rem; color: #888; }
.card-body   { display: flex; flex-direction: column; gap: 8px; }
.metric { display: flex; align-items: center; gap: 8px; }
.metric-icon { font-size: 1.1rem; width: 22px; }
.metric-val  { font-size: 1.3rem; font-weight: 700; color: #1a3a5c; min-width: 55px; }
.metric-unit { font-size: .8rem; color: #888; }
.metric-rssi .metric-val { font-size: 1rem; color: #555; }

/* ── TC4 카드 ────────────────────────────────────────────── */
.tc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.tc-ch {
  background: #fff8f0; border: 1px solid #fde8c8;
  border-radius: 8px; padding: 7px 10px;
  display: flex; flex-direction: column; align-items: center; gap: 1px;
}
.tc-label { font-size: .7rem; font-weight: 600; color: #e67e22; }
.tc-val   { font-size: 1.1rem; font-weight: 700; color: #1a3a5c; }
.tc-unit  { font-size: .68rem; color: #888; }
.tc-divider { border-top: 1px dashed #e0e0e0; margin: 4px 0; }

.card-footer {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 14px; padding-top: 10px; border-top: 1px solid #eee;
}
.card-ts { font-size: .75rem; color: #aaa; }
.status-dot { width: 10px; height: 10px; border-radius: 50%; }
.status-dot.online  { background: #2ecc71; box-shadow: 0 0 6px #2ecc71; }
.status-dot.offline { background: #e74c3c; }
.card-rx   { border-left: 4px solid #3498db; }
.card-thb  { border-left: 4px solid #2ecc71; }
.card-tc4  { border-left: 4px solid #e67e22; }

/* ── 뱃지 ────────────────────────────────────────────────── */
.badge-rx, .badge-thb, .badge-tc4 {
  font-size: .7rem; padding: 2px 7px; border-radius: 10px;
  font-weight: 600; letter-spacing: .3px;
}
.badge-rx  { background: #d6eaf8; color: #2980b9; }
.badge-thb { background: #d5f5e3; color: #27ae60; }
.badge-tc4 { background: #fdebd0; color: #d35400; }

/* ── 디바이스 관리 테이블 ────────────────────────────────── */
.table-wrap { overflow-x: auto; }
.dev-table {
  width: 100%; border-collapse: collapse;
  background: #fff; border-radius: 10px;
  overflow: hidden; box-shadow: 0 2px 8px rgba(0,0,0,.07);
}
.dev-table th {
  background: #1a3a5c; color: #fff;
  padding: 12px 14px; text-align: left; font-size: .88rem;
}
.dev-table td { padding: 10px 14px; border-bottom: 1px solid #f0f0f0; font-size: .9rem; }
.dev-table tr:last-child td { border-bottom: none; }
.dev-table tr:hover td { background: #f8f9fa; }
.dev-table input[type=text] {
  border: 1px solid #ddd; border-radius: 6px;
  padding: 5px 9px; font-size: .88rem; width: 140px;
}
.dev-table input[type=text]:focus { outline: none; border-color: #1a3a5c; }
.ts-cell { font-size: .8rem; color: #888; white-space: nowrap; }
.btn-save {
  background: #1a3a5c; color: #fff; border: none;
  padding: 6px 14px; border-radius: 6px; cursor: pointer; font-size: .85rem;
}
.btn-save:hover { background: #2c5282; }
.btn-delete {
  background: #e74c3c; color: #fff; border: none;
  padding: 6px 14px; border-radius: 6px; cursor: pointer; font-size: .85rem;
}
.btn-delete:hover { background: #c0392b; }
code { background: #f0f2f5; padding: 2px 7px; border-radius: 4px; font-size: .85rem; }

/* ── 로그인 ──────────────────────────────────────────────── */
body.login-page {
  display: flex; justify-content: center; align-items: center;
  min-height: 100vh; background: #1a3a5c;
}
.login-box {
  background: #fff; border-radius: 16px;
  padding: 48px 40px; width: 340px; text-align: center;
  box-shadow: 0 8px 32px rgba(0,0,0,.2);
}
.login-logo { font-size: 3rem; margin-bottom: 12px; }
.login-box h1 { font-size: 1.3rem; color: #1a3a5c; margin-bottom: 28px; line-height: 1.5; }
.login-box input {
  display: block; width: 100%; padding: 12px 14px;
  margin-bottom: 12px; border: 1px solid #ddd; border-radius: 8px; font-size: .95rem;
}
.login-box input:focus { outline: none; border-color: #1a3a5c; }
.login-box button {
  width: 100%; padding: 12px; background: #1a3a5c; color: #fff;
  border: none; border-radius: 8px; font-size: 1rem; cursor: pointer; margin-top: 4px;
}
.login-box button:hover { background: #2c5282; }
.alert-error {
  background: #fde8e8; color: #c0392b;
  padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; font-size: .9rem;
}

/* ── 기타 공통 ───────────────────────────────────────────── */
.no-data { text-align: center; color: #aaa; padding: 40px; grid-column: 1/-1; }

@media (max-width: 600px) {
  nav { padding: 0 14px; }
  .nav-brand { font-size: .95rem; }
  main { padding: 16px 10px; }
  .card-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .metric-val { font-size: 1.1rem; }
}

/* ── 계정 추가 폼 ────────────────────────────────────────── */
.form-card {
  background: #fff; border-radius: 12px;
  padding: 24px; margin-bottom: 16px;
  box-shadow: 0 2px 8px rgba(0,0,0,.07);
}
.form-card h3 { font-size: 1rem; color: #1a3a5c; margin-bottom: 14px; }
.add-form { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.add-form input, .add-form select {
  padding: 8px 12px; border: 1px solid #ddd; border-radius: 8px; font-size: .9rem;
}
.add-form input:focus, .add-form select:focus { outline: none; border-color: #1a3a5c; }
.badge-admin { background: #fde8d8; color: #c0392b; padding: 2px 8px; border-radius: 10px; font-size: .8rem; }
.badge-site  { background: #d5f5e3; color: #27ae60; padding: 2px 8px; border-radius: 10px; font-size: .8rem; }

/* ── 히스토리 모달 ───────────────────────────────────────── */
.modal-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,.5); z-index: 1000;
  justify-content: center; align-items: center; padding: 16px;
}
.modal {
  background: #fff; border-radius: 16px;
  width: 100%; max-width: 760px; max-height: 90vh;
  overflow-y: auto; box-shadow: 0 8px 32px rgba(0,0,0,.25);
}
.modal-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 20px 24px 16px; border-bottom: 1px solid #eee;
  position: sticky; top: 0; background: #fff; z-index: 1;
}
.modal-header h3 { font-size: 1.1rem; color: #1a3a5c; }
.modal-controls { display: flex; gap: 10px; align-items: center; }
.modal-controls select { padding: 6px 10px; border: 1px solid #ddd; border-radius: 8px; font-size: .88rem; }
.btn-close { background: #eee; border: none; border-radius: 8px; width: 32px; height: 32px; cursor: pointer; font-size: 1rem; }
.btn-close:hover { background: #ddd; }
.modal-body { padding: 20px 24px; display: flex; flex-direction: column; gap: 24px; }
.chart-wrap { }
.chart-label { font-size: .85rem; font-weight: 600; color: #555; margin-bottom: 6px; }
.modal-loading { display: none; text-align: center; padding: 40px; color: #aaa; font-size: .95rem; }
@media (max-width: 600px) {
  .modal { border-radius: 12px; }
  .modal-body { padding: 14px; gap: 18px; }
}

/* ── 결로방지·환기제어 페이지 ────────────────────────────── */
.cond-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 20px;
  align-items: start;
}
@media (max-width: 900px) {
  .cond-layout { grid-template-columns: 1fr; }
}

.cond-panel { display: flex; flex-direction: column; gap: 0; }
.cond-result { display: flex; flex-direction: column; gap: 0; }

.cond-field-group { display: flex; flex-direction: column; gap: 10px; }
.cond-field { display: flex; flex-direction: column; gap: 4px; }
.cond-field label { font-size: .85rem; color: #555; font-weight: 600; }
.cond-field input[type=number] {
  padding: 8px 12px; border: 1px solid #ddd; border-radius: 8px;
  font-size: .95rem; width: 100%;
}
.cond-field input[type=number]:focus { outline: none; border-color: #1a3a5c; }

.cond-input-row { display: flex; gap: 8px; }
.cond-input-row input { flex: 1; }

.btn-sensor {
  background: #f0f2f5; color: #555; border: 1px solid #ddd;
  padding: 6px 10px; border-radius: 8px; cursor: pointer; font-size: .82rem;
  white-space: nowrap;
}
.btn-sensor:hover { background: #e0e4ea; }
.btn-outline {
  background: #fff; color: #555; border: 1px solid #ddd;
  padding: 6px 14px; border-radius: 6px; cursor: pointer; font-size: .85rem;
  margin-left: 6px;
}
.btn-outline:hover { background: #f0f2f5; }

.sensor-picker {
  background: #f8f9fa; border: 1px solid #ddd;
  border-radius: 8px; padding: 12px; margin-top: 10px;
}
.sensor-picker select {
  width: 100%; padding: 7px 10px; border: 1px solid #ddd;
  border-radius: 8px; font-size: .88rem;
}
.picker-label { font-size: .8rem; color: #888; margin-bottom: 6px; }

.btn-analyze {
  width: 100%; padding: 14px; background: #1a3a5c; color: #fff;
  border: none; border-radius: 10px; font-size: 1rem; font-weight: 600;
  cursor: pointer; margin-top: 4px; letter-spacing: .3px;
}
.btn-analyze:hover { background: #2c5282; }

.cond-banner {
  display: flex; align-items: center; gap: 12px;
  padding: 18px 20px; border-radius: 12px; margin-bottom: 16px;
  color: #fff; font-size: 1.1rem; font-weight: 700;
}

.summary-table { width: 100%; border-collapse: collapse; margin-top: 4px; }
.summary-table td { padding: 8px 12px; border-bottom: 1px solid #f0f0f0; font-size: .92rem; }
.summary-table td:first-child { color: #555; width: 50%; }
.summary-table td:last-child { font-weight: 700; color: #1a3a5c; }
.summary-table tr:last-child td { border-bottom: none; }

.cond-note {
  margin-top: 12px; padding: 10px 14px;
  background: #fff8e1; border-left: 3px solid #f39c12;
  border-radius: 4px; font-size: .85rem; color: #7d6608;
}