/* ========== ThermalMonitor V4.0 Web UI ========== */
/* Dark industrial theme matching the mobile APP */

:root {
  --bg-primary: #0F172A;
  --bg-card: #1B2336;
  --bg-surface: #1E293B;
  --bg-input: #272F42;
  --accent-blue: #3B82F6;
  --accent-purple: #A78BFA;
  --accent-green: #22C55E;
  --status-warn: #EAB308;
  --status-error: #EF4444;
  --status-cool: #22D3EE;
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --border: #455068;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Fira Code', 'Consolas', monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
}

/* ===== Layout ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.center-screen { display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 24px; }

/* ===== Cards ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}
.card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.card-title { font-size: 15px; font-weight: 600; color: var(--text-primary); }

/* ===== Forms ===== */
.form-group { margin-bottom: 18px; }
.form-label { display: block; font-size: 12px; font-weight: 600; color: var(--text-secondary); margin-bottom: 6px; }
.form-input {
  width: 100%; padding: 12px 16px;
  background: var(--bg-input); border: 1px solid var(--border); border-radius: 10px;
  color: var(--text-primary); font-size: 14px; font-family: var(--font);
  transition: border-color 0.2s;
}
.form-input:focus { outline: none; border-color: var(--accent-blue); }
.form-input::placeholder { color: var(--text-muted); opacity: 0.6; }
.form-error {
  background: rgba(239,68,68,0.1); border: 1px solid rgba(239,68,68,0.3);
  border-radius: 8px; padding: 10px 16px; margin-bottom: 16px;
  font-size: 13px; color: var(--status-error); display: flex; align-items: center; gap: 8px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 24px; border: none; border-radius: 10px;
  font-size: 14px; font-weight: 600; font-family: var(--font); cursor: pointer;
  transition: opacity 0.2s, transform 0.1s;
}
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--accent-blue); color: #fff; }
.btn-primary:hover { opacity: 0.9; }
.btn-danger { background: var(--status-error); color: #fff; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text-secondary); }
.btn-outline:hover { border-color: var(--accent-blue); color: var(--accent-blue); }
.btn-sm { padding: 6px 14px; font-size: 12px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ===== Navigation ===== */
.navbar {
  background: var(--bg-card); border-bottom: 1px solid var(--border);
  padding: 0 24px; height: 60px;
  display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 100;
}
.navbar-brand { display: flex; align-items: center; gap: 10px; font-size: 16px; font-weight: 700; color: var(--text-primary); text-decoration: none; }
.navbar-brand .logo { width: 32px; height: 32px; background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple)); border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 18px; }
.navbar-right { display: flex; align-items: center; gap: 16px; }
.navbar-user { font-size: 13px; color: var(--text-secondary); }
.navbar-link { color: var(--text-secondary); text-decoration: none; font-size: 14px; padding: 8px 12px; border-radius: 6px; transition: all 0.2s; }
.navbar-link:hover { color: var(--accent-blue); background: var(--bg-surface); }
.navbar-link.active { color: var(--accent-blue); }

/* ===== Badges ===== */
.badge { display: inline-flex; align-items: center; padding: 2px 8px; border-radius: 4px; font-size: 11px; font-weight: 600; }
.badge-super { background: rgba(234,179,8,0.15); color: var(--status-warn); border: 1px solid rgba(234,179,8,0.3); }
.badge-admin { background: rgba(59,130,246,0.15); color: var(--accent-blue); border: 1px solid rgba(59,130,246,0.3); }
.badge-user { background: rgba(100,116,139,0.15); color: var(--text-muted); }
.badge-pending { background: rgba(234,179,8,0.15); color: var(--status-warn); }
.badge-approved { background: rgba(34,197,94,0.15); color: var(--accent-green); }
.badge-rejected { background: rgba(239,68,68,0.15); color: var(--status-error); }
.badge-disabled { background: rgba(100,116,139,0.15); color: var(--text-muted); }

/* ===== Tables ===== */
.table { width: 100%; border-collapse: collapse; }
.table th { text-align: left; padding: 10px 16px; font-size: 11px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; border-bottom: 1px solid var(--border); }
.table td { padding: 12px 16px; font-size: 13px; color: var(--text-secondary); border-bottom: 1px solid rgba(69,80,104,0.3); }
.table tr:hover td { background: rgba(30,41,59,0.5); }

/* ===== Grid ===== */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
@media (max-width: 768px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

/* ===== Stats ===== */
.stat-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 20px; }
.stat-label { font-size: 12px; color: var(--text-secondary); margin-bottom: 8px; display: flex; align-items: center; gap: 6px; }
.stat-value { font-size: 28px; font-weight: 700; font-family: var(--font-mono); }

/* ===== Tabs ===== */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 20px; }
.tab { padding: 10px 20px; font-size: 13px; color: var(--text-muted); cursor: pointer; border-bottom: 2px solid transparent; transition: all 0.2s; }
.tab:hover { color: var(--text-secondary); }
.tab.active { color: var(--accent-blue); border-bottom-color: var(--accent-blue); }

/* ===== Loading ===== */
.spinner { width: 20px; height: 20px; border: 2.5px solid rgba(255,255,255,0.3); border-top-color: #fff; border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.loading-overlay { display: flex; align-items: center; justify-content: center; min-height: 200px; }

/* ===== Misc ===== */
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 13px; }
.text-xs { font-size: 11px; }
.mt-4 { margin-top: 16px; }
.mt-8 { margin-top: 32px; }
.mb-4 { margin-bottom: 16px; }
.hidden { display: none !important; }
.flex { display: flex; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-4 { gap: 16px; }

/* ===== Data display ===== */
.data-row { display: flex; gap: 16px; margin-bottom: 12px; }
.data-label { width: 100px; font-size: 11px; color: var(--text-muted); }
.data-value { flex: 1; font-size: 13px; color: var(--text-secondary); }

/* ===== Phase indicator ===== */
.phase-indicator { display: inline-flex; align-items: center; gap: 6px; padding: 4px 12px; border-radius: 20px; font-size: 12px; font-weight: 600; }
.phase-standby { background: rgba(148,163,184,0.15); color: var(--text-secondary); }
.phase-heating { background: rgba(234,179,8,0.15); color: var(--status-warn); }
.phase-cooling { background: rgba(34,211,238,0.15); color: var(--status-cool); }

/* ===== Connection status ===== */
.conn-status { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; }
.conn-dot { width: 8px; height: 8px; border-radius: 50%; }
.conn-dot.online { background: var(--accent-green); box-shadow: 0 0 6px var(--accent-green); }
.conn-dot.offline { background: var(--status-error); }

/* ===== Info labels (for detail modals) ===== */
.info-label { font-size: 11px; color: var(--text-muted); margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.5px; font-weight: 600; }
.info-value { font-size: 14px; color: var(--text-primary); padding-bottom: 8px; }

/* ===== Modal ===== */
.modal { animation: fadeIn 0.2s ease-out; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }