@import url('https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&family=Syne:wght@400;600;700;800&display=swap');

:root {
  --bg: #080c10;
  --bg2: #0d1117;
  --bg3: #131a22;
  --bg4: #1a2332;
  --border: #1e2d3d;
  --border2: #243447;
  --text: #e6edf3;
  --text2: #8b949e;
  --text3: #4a5568;
  --cyan: #00d4ff;
  --green: #00ff88;
  --yellow: #ffcc00;
  --orange: #ff8800;
  --red: #ff3355;
  --purple: #bd93f9;
}

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

html, body {
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  max-width: 100vw;
}

body {
  font-family: 'Syne', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,212,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.025) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

#app {
  position: relative;
  z-index: 1;
}

.sidebar {
  z-index: 100;
}

.main {
  margin-left: 240px;
  min-height: 100vh;
  position: relative;
  z-index: 1;
  overflow-y: visible;
  overflow-x: hidden;
  max-width: calc(100vw - 240px);
}

/* ===== LOGIN ===== */
#login-screen {
  position: fixed; inset: 0;
  background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000;
}

.login-box {
  background: var(--bg2);
  border: 1px solid var(--border2);
  border-radius: 16px;
  padding: 48px 40px;
  width: 100%; max-width: 400px;
  position: relative;
  animation: fadeIn 0.4s ease;
}

.login-box::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  border-radius: 16px 16px 0 0;
}

.login-logo {
  font-size: 28px; font-weight: 800; letter-spacing: -1px; margin-bottom: 6px;
}
.login-logo span { color: var(--cyan); }
.login-sub { color: var(--text2); font-size: 12px; font-family: 'Space Mono', monospace; margin-bottom: 32px; }

.form-group { margin-bottom: 18px; }
.form-group label {
  display: block; font-size: 10px; font-weight: 600;
  letter-spacing: 1.5px; text-transform: uppercase;
  color: var(--text2); margin-bottom: 8px;
  font-family: 'Space Mono', monospace;
}
.form-group input, .form-input {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-radius: 8px;
  padding: 12px 14px;
  color: var(--text);
  font-family: 'Space Mono', monospace;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.form-group input:focus, .form-input:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0,212,255,0.1);
}

.btn-login {
  width: 100%; background: var(--cyan); color: var(--bg);
  border: none; border-radius: 8px; padding: 14px;
  font-family: 'Syne', sans-serif; font-size: 15px; font-weight: 700;
  cursor: pointer; margin-top: 6px; transition: all 0.2s;
}
.btn-login:hover { background: #33ddff; box-shadow: 0 0 20px rgba(0,212,255,0.3); transform: translateY(-1px); }

.login-error {
  color: var(--red); font-size: 12px; font-family: 'Space Mono', monospace;
  margin-top: 10px; text-align: center; display: none;
}

/* ===== LAYOUT ===== */
#app { position: relative; z-index: 1; }

.sidebar {
  position: fixed; left: 0; top: 0; bottom: 0; width: 240px;
  background: var(--bg2); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; z-index: 100;
  transition: transform 0.3s;
}

.sidebar-logo {
  padding: 22px 20px 18px;
  border-bottom: 1px solid var(--border);
  font-size: 22px; font-weight: 800; letter-spacing: -0.5px;
}
.sidebar-logo span { color: var(--cyan); }
.sidebar-logo small {
  display: block; font-size: 10px; color: var(--text3);
  font-family: 'Space Mono', monospace; font-weight: 400;
  letter-spacing: 1px; text-transform: uppercase; margin-top: 3px;
}

.sidebar-nav { flex: 1; padding: 14px 12px; overflow-y: auto; }
.nav-label { font-size: 10px; letter-spacing: 2px; text-transform: uppercase; color: var(--text3); font-family: 'Space Mono', monospace; padding: 8px 8px 4px; margin-top: 6px; }
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: 8px;
  cursor: pointer; color: var(--text2); font-size: 14px; font-weight: 600;
  transition: all 0.15s; margin-bottom: 2px; user-select: none;
}
.nav-item:hover { background: var(--bg3); color: var(--text); }
.nav-item.active { background: rgba(0,212,255,0.1); color: var(--cyan); }

.nav-badge {
  margin-left: auto; background: var(--red); color: white;
  font-size: 10px; font-weight: 700; padding: 2px 6px;
  border-radius: 10px; font-family: 'Space Mono', monospace;
  animation: pulseBadge 2s infinite;
}

.sidebar-footer { padding: 14px 12px; border-top: 1px solid var(--border); }
.user-chip {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; background: var(--bg3); border-radius: 8px;
}
.user-avatar {
  width: 32px; height: 32px; background: var(--cyan); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--bg); font-size: 13px; font-weight: 700; flex-shrink: 0;
}
.user-name { font-size: 13px; font-weight: 600; }
.user-role { font-size: 11px; color: var(--text2); font-family: 'Space Mono', monospace; }


.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 28px; border-bottom: 1px solid var(--border);
  background: rgba(8,12,16,0.85); backdrop-filter: blur(10px);
  position: sticky; top: 0; z-index: 50;
}
.topbar-left { display: flex; align-items: center; gap: 12px; }
.topbar-title { font-size: 19px; font-weight: 800; }
.topbar-title span { color: var(--text2); font-weight: 400; font-size: 13px; margin-left: 6px; font-family: 'Space Mono', monospace; }
.topbar-right { display: flex; gap: 10px; align-items: center; }

.conn-indicator {
  display: flex; align-items: center; gap: 7px;
  background: var(--bg3); border: 1px solid var(--border2);
  border-radius: 40px; padding: 6px 14px;
  font-size: 12px; font-family: 'Space Mono', monospace; color: var(--text2);
}
.conn-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--text3); transition: all 0.3s; }

.btn {
  background: var(--bg3); border: 1px solid var(--border2);
  color: var(--text); border-radius: 8px; padding: 8px 16px;
  font-family: 'Syne', sans-serif; font-size: 13px; font-weight: 600;
  cursor: pointer; transition: all 0.15s; display: flex; align-items: center; gap: 6px;
}
.btn:hover { background: var(--bg4); border-color: var(--cyan); color: var(--cyan); }
.btn.primary { background: var(--cyan); color: var(--bg); border-color: var(--cyan); }
.btn.primary:hover { background: #33ddff; box-shadow: 0 0 20px rgba(0,212,255,0.25); }

.statusbar {
  display: flex; gap: 12px; padding: 14px 28px;
  background: var(--bg2); border-bottom: 1px solid var(--border);
  overflow-x: auto;
}
.stat-pill {
  display: flex; align-items: center; gap: 8px;
  background: var(--bg3); border: 1px solid var(--border2);
  border-radius: 40px; padding: 7px 14px;
  white-space: nowrap; font-size: 13px; font-weight: 600;
}
.dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.dot.green { background: var(--green); box-shadow: 0 0 6px var(--green); }
.dot.red { background: var(--red); box-shadow: 0 0 6px var(--red); animation: pulseBadge 2s infinite; }
.dot.orange { background: var(--orange); box-shadow: 0 0 6px var(--orange); }

/* ===== PAGES ===== */
.page { display: none; padding: 24px 28px; }
.page.active { display: block; }

/* ===== GROUPS / SENSORS ===== */
.group-block {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 14px; margin-bottom: 20px; overflow: hidden;
}
.group-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 15px 20px; border-bottom: 1px solid var(--border);
  cursor: pointer; transition: background 0.15s;
}
.group-header:hover { background: var(--bg3); }
.group-title { display: flex; align-items: center; gap: 10px; font-size: 15px; font-weight: 700; }
.group-meta { display: flex; align-items: center; gap: 12px; font-size: 12px; color: var(--text2); font-family: 'Space Mono', monospace; }
.group-alert-badge { background: rgba(255,51,85,0.15); color: var(--red); border: 1px solid rgba(255,51,85,0.3); border-radius: 6px; padding: 2px 8px; font-size: 11px; font-weight: 700; }

.sensors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px; padding: 18px;
}

.sensor-card {
  background: var(--bg3); border: 1px solid var(--border2);
  border-radius: 12px; padding: 16px; position: relative;
  cursor: pointer; transition: all 0.2s;
  animation: fadeIn 0.35s ease calc(var(--delay, 0s)) both;
}
.sensor-card:hover { border-color: var(--cyan); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.3); }
.sensor-card.alert { border-color: rgba(255,51,85,0.5); background: rgba(255,51,85,0.04); animation: alertPulse 3s infinite; }
.sensor-card.warn { border-color: rgba(255,136,0,0.4); background: rgba(255,136,0,0.04); }
.sensor-card.offline { border-color: rgba(74,85,104,0.4); background: rgba(74,85,104,0.04); opacity: 0.75; }
.sensor-card.emergency { border-color: rgba(255,136,0,0.6); background: rgba(255,136,0,0.05); }

.sensor-dot { position: absolute; top: 14px; right: 14px; width: 8px; height: 8px; border-radius: 50%; }
.sensor-id { font-size: 9px; color: var(--text3); font-family: 'Space Mono', monospace; margin-bottom: 5px; }
.sensor-name { font-size: 14px; font-weight: 700; margin-bottom: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sensor-temp { font-size: 34px; font-weight: 800; font-family: 'Space Mono', monospace; line-height: 1; }
.sensor-temp.temp-ok { color: var(--green); text-shadow: 0 0 20px rgba(0,255,136,0.3); }
.sensor-temp.temp-warn { color: var(--orange); text-shadow: 0 0 20px rgba(255,136,0,0.3); }
.sensor-temp.temp-alert { color: var(--red); text-shadow: 0 0 20px rgba(255,51,85,0.3); }
.sensor-unit { font-size: 15px; font-weight: 400; color: var(--text2); }
.sensor-badge { font-size: 11px; color: var(--text2); font-family: 'Space Mono', monospace; margin-top: 7px; }
.sensor-actions { display: flex; gap: 6px; margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--border); }
.action-btn {
  flex: 1; background: var(--bg4); border: 1px solid var(--border2);
  color: var(--text2); border-radius: 6px; padding: 6px 4px;
  font-size: 11px; cursor: pointer; font-family: 'Syne', sans-serif;
  font-weight: 600; transition: all 0.15s; text-align: center;
}
.action-btn:hover { background: var(--bg3); color: var(--cyan); border-color: var(--cyan); }
.action-btn.danger:hover { color: var(--red); border-color: var(--red); }

/* ===== TOGGLE ===== */
.toggle-label { cursor: pointer; display: flex; align-items: center; }
.toggle-track {
  width: 44px; height: 24px; background: var(--bg4);
  border: 1px solid var(--border2); border-radius: 12px;
  position: relative; transition: background 0.2s, border-color 0.2s;
}
.toggle-label.on .toggle-track { background: var(--cyan); border-color: var(--cyan); }
.toggle-thumb {
  position: absolute; top: 2px; left: 2px;
  width: 18px; height: 18px; background: var(--text2);
  border-radius: 50%; transition: transform 0.2s, background 0.2s;
}
.toggle-label.on .toggle-thumb { transform: translateX(20px); background: var(--bg); }

/* ===== ALERTS ===== */
.alerts-list { display: flex; flex-direction: column; gap: 12px; }
.alert-item {
  background: var(--bg2); border: 1px solid var(--border);
  border-left: 3px solid var(--red);
  border-radius: 10px; padding: 16px 20px;
  display: flex; align-items: center; gap: 14px;
}
.alert-item.warn { border-left-color: var(--orange); }
.alert-item.emergency { border-left-color: var(--orange); }
.alert-icon { font-size: 22px; }
.alert-title { font-size: 14px; font-weight: 700; margin-bottom: 4px; }
.alert-desc { font-size: 12px; color: var(--text2); font-family: 'Space Mono', monospace; }

/* ===== HISTORY ===== */
.chart-controls { margin-bottom: 20px; }
.ctrl-select, .ctrl-input {
  background: var(--bg3); border: 1px solid var(--border2);
  border-radius: 8px; padding: 10px 14px; color: var(--text);
  font-family: 'Space Mono', monospace; font-size: 13px; outline: none;
  transition: border-color 0.2s;
}
.ctrl-select { width: 260px; }
.ctrl-input { width: 100px; }
.ctrl-select:focus, .ctrl-input:focus { border-color: var(--cyan); }

.chart-card {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 14px; padding: 24px;
}
.chart-card canvas {
  width: 100% !important;
  height: 280px !important;
}
.chart-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 20px; flex-wrap: wrap; gap: 12px; }
.chart-header h3 { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.chart-header p { font-size: 12px; color: var(--text2); font-family: 'Space Mono', monospace; }
.chart-stats { display: flex; gap: 20px; }
.chart-stat { text-align: center; }
.chart-stat span { display: block; font-size: 10px; color: var(--text3); font-family: 'Space Mono', monospace; text-transform: uppercase; letter-spacing: 1px; }
.chart-stat b { font-size: 18px; font-family: 'Space Mono', monospace; }

/* ===== SETTINGS ===== */
.settings-section {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 14px; margin-bottom: 18px; overflow: hidden;
}
.settings-title {
  padding: 14px 20px; border-bottom: 1px solid var(--border);
  font-size: 11px; font-weight: 700; color: var(--text2);
  text-transform: uppercase; letter-spacing: 1px; font-family: 'Space Mono', monospace;
}
.settings-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 15px 20px; border-bottom: 1px solid var(--border); gap: 16px;
}
.settings-row:last-child { border-bottom: none; }
.settings-label { font-size: 14px; font-weight: 600; }
.settings-desc { font-size: 11px; color: var(--text2); font-family: 'Space Mono', monospace; margin-top: 2px; }

/* ===== MODAL ===== */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.7); backdrop-filter: blur(4px);
  z-index: 500; display: none; align-items: center; justify-content: center; padding: 20px;
}
.modal-overlay.open { display: flex; }
.modal {
  background: var(--bg2); border: 1px solid var(--border2);
  border-radius: 16px; padding: 30px; width: 100%; max-width: 420px; position: relative;
  animation: fadeIn 0.2s ease;
}
.modal-top-bar {
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  border-radius: 16px 16px 0 0;
}
.modal h2 { font-size: 19px; font-weight: 800; margin-bottom: 6px; }
.modal p { font-size: 12px; color: var(--text2); margin-bottom: 22px; font-family: 'Space Mono', monospace; }
.modal-actions { display: flex; gap: 10px; margin-top: 22px; }
.modal-actions .btn { flex: 1; justify-content: center; }

.device-check-list { display: flex; flex-direction: column; gap: 8px; max-height: 200px; overflow-y: auto; }
.device-check { display: flex; align-items: center; gap: 10px; padding: 8px 12px; background: var(--bg3); border-radius: 8px; cursor: pointer; font-size: 13px; }
.device-check input { accent-color: var(--cyan); width: 16px; height: 16px; }

/* ===== MISC ===== */
.empty-state {
  text-align: center; padding: 60px 20px;
  color: var(--text2); font-size: 15px; line-height: 1.8;
}
.empty-state small { font-size: 12px; font-family: 'Space Mono', monospace; }
.loading-state { padding: 40px; text-align: center; color: var(--text3); font-family: 'Space Mono', monospace; }

.mobile-menu-btn {
  display: none; background: var(--bg3); border: 1px solid var(--border2);
  color: var(--text); border-radius: 8px; padding: 8px 12px;
  cursor: pointer; font-size: 18px;
}

.sidebar-overlay {
  display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.6); z-index: 99;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: var(--bg2); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes pulseBadge {
  0%, 100% { opacity: 1; } 50% { opacity: 0.5; }
}
@keyframes alertPulse {
  0%, 100% { box-shadow: 0 0 0 1px rgba(255,51,85,0.3); }
  50% { box-shadow: 0 0 16px rgba(255,51,85,0.2), 0 0 0 1px rgba(255,51,85,0.5); }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); box-shadow: 4px 0 24px rgba(0,0,0,0.5); }
  .sidebar-overlay.open { display: block; }
  .main { margin-left: 0; max-width: 100vw; }
  .mobile-menu-btn { display: flex; }
  .sensors-grid { grid-template-columns: 1fr 1fr; }
  .page { padding: 16px; }
  .topbar { padding: 14px 16px; flex-wrap: wrap; gap: 8px; }
  .topbar-right { flex-wrap: wrap; gap: 6px; }
  .statusbar { padding: 12px 16px; flex-wrap: wrap; }
  .ctrl-select { width: 100%; }
  .settings-row { flex-wrap: wrap; gap: 10px; }
}
@media (max-width: 480px) {
  .sensors-grid { grid-template-columns: 1fr; }
  .topbar-right .conn-indicator { display: none; }
}

/* ===== LOGIN SWITCH ===== */
.login-switch {
  text-align: center;
  margin-top: 16px;
  font-size: 13px;
  color: var(--text3);
}
.login-switch a {
  color: var(--cyan);
  text-decoration: none;
}
.login-switch a:hover {
  text-decoration: underline;
}

/* ===== BTN PRIMARY (standalone) ===== */
.btn-primary {
  background: var(--cyan);
  color: #000;
  border: none;
  border-radius: 8px;
  padding: 10px 20px;
  font-size: 14px;
  font-family: 'Space Mono', monospace;
  cursor: pointer;
  font-weight: 700;
}
.btn-primary:hover {
  opacity: 0.85;
}.sensor-extra { font-size: 12px; color: var(--text2); font-family: "Space Mono", monospace; margin-top: 4px; }
.metric-btns { display:flex; gap:8px; margin-top:10px; flex-wrap:wrap; }
.metric-btn { padding:6px 14px; border-radius:20px; border:1px solid var(--border); background:transparent; color:var(--text2); font-family:'Space Mono',monospace; font-size:12px; cursor:pointer; transition:all 0.2s; }
.metric-btn.active { background:var(--cyan); color:#000; border-color:var(--cyan); }