:root {
  --bg: #f4f6f8;
  --sidebar-bg: #fff;
  --sidebar: #2c3e50;
  --sidebar-active: #34495e;
  --accent: #c8820a;
  --accent-hover: #b07208;
  --hdr-fg: #ffffff;
  --card-bg: #ffffff;
  --row-odd: #ffffff;
  --row-even: #eef1f5;
  --green: #27ae60;
  --red: #e74c3c;
  --blue: #2980b9;
  --orange: #e67e22;
  --text: #2c3e50;
  --sub-text: #6c7a89;
  --border: #dde3ea;
  --shadow: rgba(0,0,0,.08);
  --font: 'Segoe UI', 'DejaVu Sans', system-ui, sans-serif;
  --mono: 'Consolas', 'Courier New', monospace;
  --theme-icon: '\2600';
}

[data-theme="dark"] {
  --bg: #1a1d23;
  --sidebar-bg: #22262e;
  --sidebar: #2d323b;
  --sidebar-active: #3a404b;
  --card-bg: #262b33;
  --hdr-fg: #e0e0e0;
  --row-odd: #262b33;
  --row-even: #2d323b;
  --green: #2ecc71;
  --red: #e74c3c;
  --blue: #3498db;
  --orange: #e67e22;
  --text: #d1d5db;
  --sub-text: #9ca3af;
  --border: #374151;
  --shadow: rgba(0,0,0,.25);
  --theme-icon: '\25D0';
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  transition: background .2s, color .2s;
}

/* ── Header ─────────────────────────────────── */
.app-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 64px;
  background: var(--sidebar);
  color: var(--hdr-fg);
  display: flex;
  align-items: center;
  padding: 0 24px;
  z-index: 100;
  gap: 24px;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 18px;
  font-weight: 600;
}

.brand-icon { font-size: 24px; }
.brand-sub { font-size: 13px; opacity: .7; }

.header-nav {
  display: flex;
  gap: 4px;
  margin-left: auto;
}

.nav-link {
  color: rgba(255,255,255,.75);
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 5px;
  font-size: 14px;
  transition: background .15s;
}

.nav-link:hover { background: rgba(255,255,255,.1); color: #fff; }
.nav-link.active { background: var(--accent); color: #fff; }

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.theme-toggle {
  background: none;
  border: 1px solid rgba(255,255,255,.25);
  color: #fff;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .15s;
}

.theme-toggle:hover { background: rgba(255,255,255,.1); }

.header-status {
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

/* ── Layout ──────────────────────────────────── */
.app-layout {
  display: flex;
  padding-top: 64px;
  min-height: 100vh;
}

.sidebar {
  width: 220px;
  flex-shrink: 0;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  padding: 16px;
  transition: background .2s;
}

.sidebar-title {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--sub-text);
  margin-bottom: 12px;
}

.device-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  font-size: 14px;
}

.dev-name { flex: 1; }

.main-content {
  flex: 1;
  padding: 24px;
  max-width: 1400px;
}

/* ── Dots ────────────────────────────────────── */
.dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.dot-green { background: var(--green); }
.dot-red { background: var(--red); }
.dot-grey { background: #95a5a6; }

/* ── Cards ───────────────────────────────────── */
.card {
  background: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 1px 4px var(--shadow);
  padding: 20px;
  margin-bottom: 20px;
  transition: background .2s, box-shadow .2s;
}

.card-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.card-header .card-title {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

/* ── Dashboard tag grid ──────────────────────── */
.tag-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 12px;
}

.tag-card {
  background: var(--card-bg);
  border-radius: 8px;
  padding: 16px;
  box-shadow: 0 1px 4px var(--shadow);
  transition: box-shadow .15s, transform .15s, background .2s;
  position: relative;
  overflow: hidden;
}

.tag-card:hover {
  box-shadow: 0 4px 16px var(--shadow);
  transform: translateY(-2px);
}

.tag-card-name {
  font-size: 12px;
  color: var(--sub-text);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: .3px;
}

.tag-card-value-row {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.tag-card-value {
  font-size: 28px;
  font-weight: 700;
  font-family: var(--mono);
  line-height: 1.2;
  transition: color .2s;
}

.tag-card-uom {
  font-size: 14px;
  color: var(--sub-text);
}

.tag-card-info {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  font-size: 12px;
}

.tag-card-sparkline {
  margin-top: 8px;
  height: 30px;
  width: 100%;
}

.tag-card-sparkline canvas {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 4px;
}

.tag-card.alarm {
  border-left: 4px solid var(--red);
}

.tag-card.bad {
  opacity: .6;
}

.tag-card-anomaly {
  margin-top: 6px;
  font-size: 11px;
  color: var(--red);
  font-weight: 700;
  padding: 2px 6px;
  background: rgba(231,76,60,0.1);
  border-radius: 4px;
  animation: pulse-anomaly 1s ease-in-out 3;
}

@keyframes pulse-anomaly {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.tag-card-prediction {
  margin-top: 6px;
  font-size: 11px;
  color: var(--accent);
  font-weight: 600;
  padding: 2px 6px;
  background: rgba(200,130,10,0.08);
  border-radius: 4px;
}

.tag-card.alarm .tag-card-value {
  color: var(--red);
}

/* ── Tables ──────────────────────────────────── */
table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

table.data-table th {
  background: var(--sidebar);
  color: var(--hdr-fg);
  text-align: left;
  padding: 10px 12px;
  font-weight: 600;
  font-size: 13px;
}

table.data-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}

table.data-table tr:nth-child(even) td {
  background: var(--row-even);
}

/* ── Badges ──────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
}

.badge-red { background: var(--red); color: #fff; }
.badge-green { background: var(--green); color: #fff; }
.badge-blue { background: var(--blue); color: #fff; }
.badge-orange { background: var(--orange); color: #fff; }

.badge-red.hidden { display: none; }

/* ── Buttons ─────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: 5px;
  font-size: 14px;
  font-family: var(--font);
  cursor: pointer;
  text-decoration: none;
  transition: opacity .15s, background .15s;
}

.btn:hover { opacity: .85; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { background: var(--sidebar); color: #fff; }
.btn-danger { background: var(--red); color: #fff; }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-outline:hover { border-color: var(--accent); color: var(--accent); }

/* ── Forms ───────────────────────────────────── */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--sub-text);
}

.form-control {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 5px;
  font-size: 14px;
  font-family: var(--font);
  background: var(--card-bg);
  color: var(--text);
  transition: border-color .15s, box-shadow .15s;
}

.form-control:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(200,130,10,.15);
}

.form-inline {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.filter-pills {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.pill {
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  font-size: 13px;
  cursor: pointer;
  transition: all .15s;
  color: var(--text);
}

.pill:hover { border-color: var(--accent); }
.pill.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ── Alarm severity row colors ───────────────── */
.alarm-row-fault td { background: #fde8e8 !important; }
.alarm-row-alarm td { background: #fde8e8 !important; }
.alarm-row-warning td { background: #fef5e7 !important; }
.alarm-row-info td { background: #eaf2f8 !important; }

[data-theme="dark"] .alarm-row-fault td { background: #3d1f1f !important; }
[data-theme="dark"] .alarm-row-alarm td { background: #3d1f1f !important; }
[data-theme="dark"] .alarm-row-warning td { background: #3d2e1a !important; }
[data-theme="dark"] .alarm-row-info td { background: #1a2a3d !important; }

/* ── Status bar / Stats ──────────────────────── */
.stats-bar {
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.stat-card {
  flex: 1;
  min-width: 140px;
  background: var(--card-bg);
  border-radius: 8px;
  padding: 16px;
  box-shadow: 0 1px 4px var(--shadow);
  text-align: center;
  transition: background .2s;
}

.stat-card-value {
  font-size: 28px;
  font-weight: 700;
  font-family: var(--mono);
  line-height: 1.2;
}

.stat-card-label {
  font-size: 12px;
  color: var(--sub-text);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: .3px;
}

/* ── Process / Valve page ────────────────────── */
.process-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 20px;
}

@media (max-width: 1024px) {
  .process-grid { grid-template-columns: 1fr; }
}

.tank-card .card-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.tank-visual {
  display: flex;
  justify-content: center;
  padding: 8px 0;
}

.tank-svg {
  max-width: 350px;
  height: auto;
}

.controls-card .control-section {
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.controls-card .control-section:last-child { border-bottom: none; }

.control-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--sub-text);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.btn-group {
  display: flex;
  gap: 6px;
}

.mode-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.slider-group {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.valve-slider {
  flex: 1;
  height: 6px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--border);
  border-radius: 3px;
  outline: none;
}

.valve-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
}

.slider-value {
  min-width: 40px;
  font-family: var(--mono);
  font-weight: 600;
  font-size: 14px;
}

.seq-label {
  display: inline-block;
  margin-left: 12px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}

/* Process variables */
.process-vars {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.var-item {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 8px 10px;
  background: var(--bg);
  border-radius: 6px;
}

.var-label {
  font-size: 11px;
  color: var(--sub-text);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.var-value {
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 700;
  margin-left: auto;
}

.var-uom {
  font-size: 12px;
  color: var(--sub-text);
}

/* Valve indicators */
.valve-status-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.valve-status-item {
  display: flex;
  align-items: center;
  gap: 12px;
}

.valve-indicator {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: 3px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color .3s;
}

.valve-pip {
  width: 4px;
  height: 30px;
  background: var(--accent);
  border-radius: 2px;
  transform: rotate(0deg);
  transition: transform .5s;
}

.valve-status-text {
  font-size: 13px;
}

.valve-status-text div {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 16px;
  margin-top: 4px;
}

.interlock-msg {
  margin-top: 12px;
  padding: 8px 12px;
  background: rgba(231,76,60,.1);
  border: 1px solid var(--red);
  border-radius: 5px;
  color: var(--red);
  font-size: 13px;
  font-weight: 600;
}

.interlock-msg.hidden { display: none; }

/* ── AI Chat ─────────────────────────────────── */
.chat-container {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 160px);
  max-height: 700px;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.chat-msg {
  max-width: 80%;
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 14px;
  line-height: 1.5;
  animation: fadeIn .2s;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.chat-msg.user {
  align-self: flex-end;
  background: var(--accent);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.chat-msg.assistant {
  align-self: flex-start;
  background: var(--bg);
  color: var(--text);
  border-bottom-left-radius: 4px;
}

.chat-input-row {
  display: flex;
  gap: 8px;
  padding: 12px 0;
}

.chat-input-row input {
  flex: 1;
}

.chat-tool-badge {
  font-size: 11px;
  padding: 2px 8px;
  background: var(--blue);
  color: #fff;
  border-radius: 10px;
  margin-top: 6px;
  display: inline-block;
}

/* ── Hamburger ────────────────────────────────── */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 6px;
  cursor: pointer;
  padding: 6px;
  flex-shrink: 0;
}
.hamburger span {
  display: block;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform .2s, opacity .2s;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.4);
  z-index: 98;
  opacity: 0;
  transition: opacity .25s;
}
.nav-overlay.open { opacity: 1; }

/* ── Responsive ──────────────────────────────── */
@media (max-width: 768px) {
  .hamburger { display: flex; }
  .nav-overlay { display: block; }
  .sidebar { display: none; }
  .header-nav {
    display: flex;
    position: fixed;
    top: 0; left: 0;
    width: 280px;
    height: 100vh;
    background: var(--sidebar);
    flex-direction: column;
    padding: 80px 16px 24px;
    gap: 4px;
    margin: 0;
    z-index: 101;
    transform: translateX(-100%);
    transition: transform .25s ease;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
  .header-nav.open { transform: translateX(0); }
  .nav-link {
    font-size: 15px;
    padding: 12px 16px;
    width: 100%;
    text-align: left;
  }
  .header-actions { margin-left: auto; }
  .main-content { padding: 16px; }
  .tag-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
  .form-inline { grid-template-columns: 1fr; }
  .stats-bar { flex-direction: column; }
}

/* ── Mobile fix ──────────────────────────────── */
@media (max-width: 900px) {
  /* Hamburger sempre visibile su tablet/mobile */
  .hamburger { display: flex; z-index: 102; flex-shrink: 0; }
  .nav-overlay { display: block; }
  .sidebar { display: none; }

  /* Logo ridotto su mobile */
  .header-brand img { height: 32px !important; }
  .header-brand { flex-shrink: 1; min-width: 0; }

  /* Nav drawer laterale */
  .header-nav {
    display: flex !important;
    position: fixed;
    top: 0; left: 0;
    width: 280px;
    height: 100vh;
    background: var(--sidebar);
    flex-direction: column;
    padding: 80px 16px 24px;
    gap: 4px;
    margin: 0;
    z-index: 101;
    transform: translateX(-100%);
    transition: transform .25s ease;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
  .header-nav.open { transform: translateX(0) !important; }

  .nav-link {
    font-size: 15px;
    padding: 12px 16px;
    width: 100%;
    text-align: left;
    border-radius: 6px;
  }

  /* Actions a destra */
  .header-actions { margin-left: auto; gap: 8px; }

  /* Nasconde testo Live su schermi molto piccoli */
  .header-status span:last-child { display: none; }

  /* Content padding ridotto */
  .main-content { padding: 12px; }

  /* Griglia tag compatta */
  .tag-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 10px; }

  /* Stats bar verticale */
  .stats-bar { flex-direction: column; gap: 8px; }
  .stat-card { flex: unset; }

  /* Form a colonna singola */
  .form-inline { grid-template-columns: 1fr; }

  /* Tabelle scrollabili orizzontalmente */
  .table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  table { min-width: 500px; }

  /* Card padding ridotto */
  .card { padding: 14px; }

  /* Chat full height su mobile */
  .chat-container { height: calc(100vh - 130px); max-height: unset; }

  /* Process grid a colonna singola */
  .process-grid { grid-template-columns: 1fr !important; }
  .process-vars { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .app-header { padding: 0 12px; gap: 10px; }
  .header-brand img { height: 28px !important; }
  .theme-toggle { width: 32px; height: 32px; font-size: 16px; }
  .tag-grid { grid-template-columns: 1fr 1fr; }
  .var-value { font-size: 15px; }
}