/* ═══════════════════════════════════════════════════════════════
   COMBE90 FUEL MANAGEMENT SYSTEM — TERMINAL HUD STYLESHEET
   Design language: Industrial / SCADA / Engineering terminal
   ═══════════════════════════════════════════════════════════════ */

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

:root {
  --bg:        #050505;
  --bg-card:   #080808;
  --bg-row:    #0A0A0A;
  --orange:    #E8762C;
  --orange-20: rgba(232,118,44,0.20);
  --orange-33: rgba(232,118,44,0.33);
  --orange-10: rgba(232,118,44,0.10);
  --teal:      #38D9F5;
  --teal-40:   rgba(56,217,245,0.40);
  --teal-15:   rgba(56,217,245,0.15);
  --red:       #EF4444;
  --red-dim:   rgba(239,68,68,0.12);
  --green:     #10B981;
  --mono:      'IBM Plex Mono', 'Courier New', Courier, monospace;
}

/* ── Base ─────────────────────────────────────────────────────── */
body {
  font-family: var(--mono);
  background: var(--bg);
  color: var(--orange);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  /* Scanlines */
  background-image: repeating-linear-gradient(
    0deg,
    transparent 0px, transparent 2px,
    rgba(0,0,0,0.15) 2px, rgba(0,0,0,0.15) 4px
  );
}

a { color: var(--orange); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Navbar ───────────────────────────────────────────────────── */
.navbar {
  background: var(--bg);
  border-bottom: 1px solid var(--orange-33);
  padding: 0 32px;
  height: 56px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-brand img {
  height: 28px;
  width: auto;
  opacity: 0.9;
}

.nav-brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.nav-brand-name {
  font-size: 12px;
  font-weight: 600;
  color: var(--orange);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.nav-brand-name .highlight { color: var(--teal); }

.nav-brand-sub {
  font-size: 10px;
  color: var(--teal);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.nav-center-title {
  position: absolute;
  left: 0;
  right: 0;
  pointer-events: none;
  white-space: nowrap;
  font-size: 11px;
  font-weight: 600;
  color: var(--orange);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  text-align: center;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
  justify-content: flex-end;
}

.refresh-badge {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--teal);
  letter-spacing: 0.08em;
}

.refresh-badge::before { content: '[ SYNC: '; }
.refresh-badge::after  { content: ' ]'; }

/* site-status stays hidden */
#site-status { display: none; }

/* Status dots (used in site headers) */
.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 0;
  flex-shrink: 0;
  display: inline-block;
}

.status-dot.online  { background: var(--teal); animation: hud-pulse 2s step-end infinite; }
.status-dot.offline { background: var(--red); }
.status-dot.pending { background: var(--orange); opacity: 0.4; }

@keyframes hud-pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.35; } }

/* ── Main Layout ──────────────────────────────────────────────── */
.main-container {
  max-width: 1600px;
  margin: 0 auto;
  padding: 24px 32px 48px;
}

/* ── Summary Cards ────────────────────────────────────────────── */
.summary-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 1px;
  margin-bottom: 28px;
  border: 1px solid var(--orange-20);
  background: var(--orange-20);
}

.summary-card {
  background: var(--bg-card);
  padding: 18px 16px 14px;
  position: relative;
  text-align: left;
  transition: background 0.15s;
}

.summary-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--orange-33);
}

.summary-card:hover { background: var(--bg-row); }

.summary-icon {
  display: none;
}

.summary-label {
  font-size: 10px;
  color: var(--teal);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 8px;
}

.summary-label::before { content: '> '; opacity: 0.5; }

.summary-value {
  font-size: 22px;
  font-weight: 600;
  color: var(--orange);
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}

.summary-value .unit {
  font-size: 11px;
  font-weight: 400;
  color: var(--teal);
  margin-left: 3px;
  letter-spacing: 0.05em;
}

/* ── Tabs ─────────────────────────────────────────────────────── */
.tab-nav {
  display: flex;
  gap: 0;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--orange-20);
  width: 100%;
}

.tab-btn {
  padding: 10px 24px;
  border: none;
  border-bottom: 2px solid transparent;
  background: transparent;
  color: var(--teal);
  font-size: 10px;
  font-weight: 600;
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  cursor: pointer;
  opacity: 0.65;
  transition: opacity 0.15s, border-color 0.15s, color 0.15s;
  position: relative;
  top: 1px;
}

.tab-btn:hover { opacity: 1; }

.tab-btn.active {
  color: var(--orange);
  border-bottom-color: var(--orange);
  background: transparent;
  opacity: 1;
}

.tab-content { display: none; }
.tab-content.active { display: block; }

/* ── Site Section ─────────────────────────────────────────────── */
.site-section { margin-bottom: 36px; }

.site-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  padding: 8px 12px;
  border: 1px solid var(--orange-20);
  background: var(--bg-card);
}

.site-header h2 {
  font-size: 11px;
  font-weight: 600;
  color: var(--teal);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.site-meta {
  margin-left: auto;
  font-size: 10px;
  color: var(--teal);
  display: flex;
  gap: 16px;
  align-items: center;
  letter-spacing: 0.08em;
}

.site-meta-item { letter-spacing: 0.06em; }

/* ── Pending / Error states ───────────────────────────────────── */
.pending-panel {
  border: 1px solid var(--orange-20);
  padding: 32px 24px;
  text-align: center;
  color: var(--teal);
  opacity: 0.6;
}

.pending-panel .pending-icon { font-size: 1.5rem; margin-bottom: 10px; opacity: 0.4; }
.pending-panel h3 { font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--orange); margin-bottom: 8px; }
.pending-panel p { font-size: 10px; line-height: 1.7; max-width: 420px; margin: 0 auto; letter-spacing: 0.04em; }

.error-banner {
  border: 1px solid rgba(239,68,68,0.4);
  border-left: 3px solid var(--red);
  background: var(--red-dim);
  padding: 10px 14px;
  margin-bottom: 14px;
  font-size: 11px;
  color: var(--red);
  letter-spacing: 0.06em;
}

/* ── Tank Grid ────────────────────────────────────────────────── */
.tanks-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1px;
  background: var(--orange-20);
  border: 1px solid var(--orange-20);
}

/* ── Tank Card ────────────────────────────────────────────────── */
.tank-card {
  background: var(--bg-card);
  border: none;
  padding: 18px 20px;
  position: relative;
}

.tank-card::before { display: none; }

.tank-card:hover { background: #0D0D0D; }

/* Alarm state */
.tank-card.alarm-active {
  border: none;
  outline: 1px solid var(--orange);
  outline-offset: -1px;
}

.tank-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.tank-name {
  font-size: 11px;
  font-weight: 600;
  color: var(--orange);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.tank-header-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.tank-fill-pct {
  font-size: 20px;
  font-weight: 600;
  color: var(--orange);
  letter-spacing: 0.01em;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

/* Alarm badge — blinks like a CRT warning */
.tank-alarm-badge {
  font-size: 9px;
  font-weight: 600;
  color: var(--orange);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  animation: hud-alarm 1s step-end infinite;
}

.tank-alarm-badge::before { content: '[ '; }
.tank-alarm-badge::after  { content: ' ]'; }

.alarm-dot { display: none; }

@keyframes hud-alarm { 0%,100% { opacity: 1; } 50% { opacity: 0; } }

/* Progress bar */
.tank-progress-track {
  width: 100%;
  height: 6px;
  background: var(--orange-10);
  margin: 0 0 14px;
  overflow: hidden;
}

.tank-progress-fill {
  height: 100%;
  transition: width 1s linear;
}

/* Stats row */
.tank-stats-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 14px;
}

.tank-volume-main {
  font-size: 22px;
  font-weight: 600;
  color: var(--orange);
  letter-spacing: 0.01em;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.tank-volume-main .unit {
  font-size: 11px;
  font-weight: 400;
  color: var(--teal);
  letter-spacing: 0.08em;
}

.tank-volume-sub {
  font-size: 10px;
  color: var(--teal);
  letter-spacing: 0.08em;
  margin-top: 4px;
  text-transform: uppercase;
}

.tank-temp-badge {
  font-size: 10px;
  font-weight: 600;
  color: var(--teal);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.tank-temp-badge::before { content: 'T: '; opacity: 0.5; }

/* Details / technical data */
.tank-details {
  border-top: 1px solid var(--orange-10);
  padding-top: 10px;
  margin-top: 2px;
}

.tank-details summary {
  font-size: 10px;
  color: var(--teal);
  cursor: pointer;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  list-style: none;
  user-select: none;
  transition: opacity 0.15s;
}

.tank-details summary::before { content: '[ + TECHNICAL DATA ]'; }
.tank-details summary:hover { opacity: 1; }
.tank-details summary::-webkit-details-marker { display: none; }
.tank-details[open] summary::before { content: '[ - TECHNICAL DATA ]'; }
.tank-details[open] summary { margin-bottom: 10px; opacity: 1; }
.tank-details .data-grid { margin-top: 0; }

/* ── Data Grid ────────────────────────────────────────────────── */
.data-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--orange-10);
  border: 1px solid var(--orange-10);
}

.data-cell {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 8px;
  background: var(--bg-card);
  font-size: 10px;
  gap: 8px;
}

.data-cell .label {
  color: var(--teal);
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

.data-cell .value {
  font-weight: 600;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  text-align: right;
}

.data-cell.full-span { grid-column: 1 / -1; }

/* ── Alarm Thresholds ─────────────────────────────────────────── */
.alarm-thresholds {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--orange-10);
}

.alarm-thresholds-label {
  font-size: 10px;
  color: var(--teal);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 6px;
}

.alarm-pills {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.alarm-pill {
  font-size: 10px;
  padding: 2px 7px;
  display: flex;
  align-items: center;
  gap: 5px;
  border: 1px solid var(--orange-20);
  color: var(--teal);
  letter-spacing: 0.06em;
}

.alarm-pill .dot {
  width: 4px;
  height: 4px;
  border-radius: 0;
}

.alarm-pill.hh .dot { background: var(--red); }
.alarm-pill.h .dot  { background: var(--orange); }
.alarm-pill.l .dot  { background: var(--teal); }
.alarm-pill.ll .dot { background: var(--red); }
.alarm-pill.w .dot  { background: var(--teal); }

.tank-timestamp {
  font-size: 10px;
  color: var(--teal);
  margin-top: 8px;
  letter-spacing: 0.06em;
  opacity: 0.65;
  text-transform: uppercase;
}

/* ── Loading & Error ──────────────────────────────────────────── */
.loading-state {
  text-align: center;
  padding: 80px 20px;
  color: var(--orange);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.6;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 1px solid var(--orange-20);
  border-top-color: var(--orange);
  border-radius: 0;
  animation: hud-spin 0.9s linear infinite;
  margin: 0 auto 16px;
}

@keyframes hud-spin { to { transform: rotate(360deg); } }

/* ── Charts Tab ───────────────────────────────────────────────── */
.charts-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--orange-20);
}

.charts-header h3 {
  font-size: 11px;
  font-weight: 600;
  color: var(--orange);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.charts-header h3::before { content: '> '; color: var(--teal); opacity: 0.6; }

.charts-header select {
  background: var(--bg-card);
  color: var(--teal);
  border: 1px solid var(--orange-33);
  padding: 6px 10px;
  font-size: 10px;
  font-family: var(--mono);
  letter-spacing: 0.08em;
  cursor: pointer;
  text-transform: uppercase;
}

.charts-header select:focus { outline: 1px solid var(--orange); }

.charts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--orange-10);
}

.chart-card {
  background: var(--bg-card);
  border: none;
  padding: 16px;
}

.chart-card.full-width { grid-column: 1 / -1; }

.chart-card-title {
  font-size: 10px;
  font-weight: 600;
  color: var(--teal);
  margin-bottom: 14px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 8px;
}

.chart-card-title .dot { display: none; }
.chart-card-title::before { content: '// '; color: var(--orange); opacity: 0.4; }

.chart-container { position: relative; height: 240px; }

.db-stats-bar {
  font-size: 10px;
  color: var(--teal);
  letter-spacing: 0.06em;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--orange-10);
  text-transform: uppercase;
}

/* ── Alarm Log ────────────────────────────────────────────────── */
.alarm-log-card {
  border: 1px solid var(--orange-20);
  background: var(--bg-card);
  overflow: hidden;
}

.alarm-log-header {
  padding: 12px 18px;
  border-bottom: 1px solid var(--orange-20);
  font-size: 10px;
  font-weight: 600;
  color: var(--orange);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.alarm-log-header::before { content: '> '; color: var(--teal); opacity: 0.6; }

.alarm-log-body {
  max-height: 480px;
  overflow-y: auto;
}

.alarm-log-body::-webkit-scrollbar { width: 4px; }
.alarm-log-body::-webkit-scrollbar-track { background: transparent; }
.alarm-log-body::-webkit-scrollbar-thumb { background: var(--orange-20); }

.alarm-row {
  display: grid;
  grid-template-columns: 160px 130px 120px 1fr;
  gap: 12px;
  padding: 9px 18px;
  border-bottom: 1px solid var(--orange-10);
  font-size: 10px;
  align-items: center;
  letter-spacing: 0.04em;
}

.alarm-row:nth-child(odd) { background: var(--bg); }
.alarm-row:nth-child(even) { background: var(--bg-card); }
.alarm-row:hover { background: var(--bg-row); }
.alarm-row:last-child { border-bottom: none; }

.alarm-time   { color: var(--teal); font-variant-numeric: tabular-nums; }
.alarm-site   { color: var(--teal); letter-spacing: 0.06em; text-transform: uppercase; }
.alarm-tank   { color: var(--orange); font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; }
.alarm-detail { color: var(--teal); opacity: 0.75; }

.alarm-empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--teal);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ── Footer ───────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--orange-20);
  padding: 14px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 10px;
  color: var(--teal);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  max-width: 1600px;
  margin: 0 auto;
  opacity: 0.7;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-brand img { height: 16px; opacity: 0.4; filter: grayscale(1); }

/* ── AI Chat Widget ───────────────────────────────────────────── */
#ai-fab {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: #E8762C;
  border: none;
  box-shadow: 0 0 18px rgba(232,118,44,0.5);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  transition: opacity 0.15s;
}

#ai-fab:hover { opacity: 0.88; }

@keyframes fab-pulse {
  0%,100% { box-shadow: 0 0 0 0 rgba(16,185,129,0.6); }
  50%      { box-shadow: 0 0 0 5px rgba(16,185,129,0); }
}

#ai-fab .fab-label {
  font-family: var(--mono);
  font-size: 8px;
  font-weight: 600;
  color: var(--orange);
  letter-spacing: 0.05em;
  line-height: 1.2;
  overflow: visible;
  text-transform: uppercase;
}

#ai-panel {
  position: fixed;
  bottom: 96px;
  right: 28px;
  width: 380px;
  max-height: 580px;
  background: var(--bg-card);
  border: 1px solid var(--orange-33);
  border-radius: 0;
  display: flex;
  flex-direction: column;
  z-index: 999;
  overflow: hidden;
  transform-origin: bottom right;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

#ai-panel.hidden {
  transform: scale(0.9) translateY(12px);
  opacity: 0;
  pointer-events: none;
}

.ai-panel-header {
  padding: 10px 14px;
  padding-right: 42px;
  border-bottom: 1px solid var(--orange-20);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  flex-shrink: 0;
  background: var(--bg);
  position: relative;
}

.ai-header-title {
  font-size: 13px;
  font-weight: 700;
  color: #00B4D8;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
}

.ai-header-dot { display: none; }

.ai-header-status {
  font-size: 11px;
  color: var(--teal);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-align: left;
}

/* Legacy elements hidden — replaced by single-line header */
.ai-header-icon { display: none; }
.ai-header-text { display: none; }
.ai-header-sub  { display: none; }

.ai-close-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  background: none;
  border: 1px solid var(--orange-33);
  color: var(--orange);
  font-size: 14px;
  cursor: pointer;
  padding: 2px 7px;
  line-height: 1.4;
  font-family: var(--mono);
  transition: border-color 0.15s;
}

.ai-close-btn:hover { border-color: var(--orange); }

#ai-messages {
  flex: 1;
  overflow-y: auto;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  scroll-behavior: smooth;
}

#ai-messages::-webkit-scrollbar { width: 4px; }
#ai-messages::-webkit-scrollbar-track { background: transparent; }
#ai-messages::-webkit-scrollbar-thumb { background: var(--orange-20); }

.ai-msg {
  max-width: 92%;
  font-size: 11px;
  line-height: 1.6;
  padding: 8px 12px;
  border-radius: 0;
  word-break: break-word;
  white-space: pre-wrap;
  letter-spacing: 0.04em;
}

.ai-msg.user {
  align-self: flex-end;
  background: var(--bg-row);
  color: var(--orange);
  border: 1px solid var(--orange-33);
}

.ai-msg.assistant {
  align-self: flex-start;
  background: var(--bg);
  color: var(--teal);
  border: 1px solid var(--orange-10);
}

.ai-msg.error {
  align-self: flex-start;
  background: var(--red-dim);
  color: var(--red);
  border: 1px solid rgba(239,68,68,0.3);
}

.ai-typing {
  align-self: flex-start;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--bg);
  border: 1px solid var(--orange-10);
  font-size: 10px;
  color: var(--teal);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ai-typing-dots { display: flex; gap: 3px; }

.ai-typing-dots span {
  width: 4px;
  height: 4px;
  border-radius: 0;
  background: var(--orange);
  animation: hud-dot 1.2s step-end infinite;
}

.ai-typing-dots span:nth-child(2) { animation-delay: 0.3s; }
.ai-typing-dots span:nth-child(3) { animation-delay: 0.6s; }

@keyframes hud-dot { 0%,100% { opacity: 0.2; } 50% { opacity: 1; } }

.ai-suggestions {
  padding: 8px 14px 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  flex-shrink: 0;
  border-top: 1px solid var(--orange-10);
}

.ai-chip {
  font-size: 10px;
  padding: 4px 9px;
  border: 1px solid var(--orange-20);
  background: transparent;
  color: var(--teal);
  cursor: pointer;
  font-family: var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: border-color 0.15s, color 0.15s;
  line-height: 1.4;
}

.ai-chip::before { content: '> '; opacity: 0.5; }

.ai-chip:hover {
  border-color: var(--orange-33);
  color: var(--orange);
}

.ai-input-area {
  padding: 10px 12px;
  border-top: 1px solid var(--orange-20);
  display: flex;
  gap: 8px;
  align-items: flex-end;
  flex-shrink: 0;
  background: var(--bg);
}

#ai-input {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--orange-20);
  border-radius: 0;
  padding: 8px 10px;
  color: var(--orange);
  font-size: 11px;
  font-family: var(--mono);
  resize: none;
  min-height: 36px;
  max-height: 110px;
  line-height: 1.45;
  letter-spacing: 0.04em;
  transition: border-color 0.15s;
}

#ai-input:focus { outline: none; border-color: var(--orange-33); }
#ai-input::placeholder { color: var(--teal); opacity: 0.35; letter-spacing: 0.06em; }

#ai-send {
  width: 36px;
  height: 36px;
  border-radius: 0;
  background: transparent;
  border: 1px solid var(--orange-33);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: border-color 0.15s;
}

#ai-send:hover { border-color: var(--orange); }
#ai-send:active { opacity: 0.7; }
#ai-send:disabled { opacity: 0.25; cursor: not-allowed; }
#ai-send svg { width: 14px; height: 14px; fill: var(--orange); }

/* ── Summary Sub-label ───────────────────────────────────────── */
.summary-sub {
  font-size: 9px;
  color: var(--teal);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 4px;
  opacity: 0.65;
}

.summary-card.summary-alert::after { background: var(--red); }

/* ── Locked Tabs ─────────────────────────────────────────────── */
.tab-locked {
  opacity: 0.4;
}

.tab-locked::after {
  content: ' [SOON]';
  font-size: 8px;
  opacity: 0.7;
  letter-spacing: 0.08em;
}

.tab-locked.active {
  color: var(--teal);
  border-bottom-color: var(--teal);
  opacity: 0.7;
}

/* ── Locked Panel ────────────────────────────────────────────── */
.locked-panel {
  border: 1px solid var(--orange-20);
  padding: 72px 24px;
  text-align: center;
  background: var(--bg-card);
}

.locked-panel-icon {
  font-size: 2rem;
  opacity: 0.12;
  margin-bottom: 20px;
  color: var(--orange);
  display: block;
}

.locked-panel-code {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--orange);
  margin-bottom: 14px;
  text-transform: uppercase;
}

.locked-panel p {
  font-size: 11px;
  color: var(--teal);
  letter-spacing: 0.06em;
  max-width: 420px;
  margin: 0 auto;
  line-height: 1.9;
  opacity: 0.75;
}

/* ── WhatsApp Status Strip ───────────────────────────────────── */
.whatsapp-strip {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 32px;
  padding: 11px 16px;
  border: 1px solid var(--orange-20);
  background: var(--bg-card);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.ws-label {
  font-weight: 600;
  color: var(--orange);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  white-space: nowrap;
  flex-shrink: 0;
}

.ws-label::before { content: '> '; opacity: 0.5; }

.ws-status {
  font-size: 9px;
  font-weight: 600;
  color: var(--teal);
  border: 1px solid var(--teal-40);
  padding: 2px 8px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
  flex-shrink: 0;
  opacity: 0.65;
}

.ws-text {
  color: var(--teal);
  opacity: 0.6;
  line-height: 1.6;
}

/* ── AI Feedback Buttons ─────────────────────────────────────── */
.ai-feedback {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 7px;
  padding-top: 6px;
  border-top: 1px solid var(--orange-10);
}

.ai-feedback-label {
  font-size: 9px;
  color: var(--teal);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.55;
  flex: 1;
}

.ai-fb-btn {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  color: var(--teal);
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0 4px;
  letter-spacing: 0.08em;
  opacity: 0.5;
  transition: opacity 0.15s, color 0.15s;
  line-height: 1;
}

.ai-fb-btn:hover { opacity: 1; color: var(--orange); }

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 1400px) {
  .summary-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 1200px) {
  .summary-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 768px) {
  .navbar { padding: 0 14px; height: 50px; }
  .main-container { padding: 14px; }
  .summary-grid { grid-template-columns: repeat(2, 1fr); }
  .tanks-grid { grid-template-columns: 1fr; }
  .charts-grid { grid-template-columns: 1fr; }
  .tab-btn { padding: 10px 14px; font-size: 9px; }
  .nav-brand-sub { display: none; }
  .alarm-row { grid-template-columns: 1fr; gap: 3px; }
  .site-meta { display: none; }
  .nav-center-title { display: none; }
  .tab-locked::after { display: none; }
  .whatsapp-strip { flex-direction: column; align-items: flex-start; gap: 6px; }
}

@media (max-width: 480px) {
  #ai-panel { right: 0; bottom: 72px; width: 100vw; max-height: 70vh; }
  #ai-fab { bottom: 16px; right: 16px; }
}

/* ═══════════════════════════════════════════════════════════════
   BOOT OVERLAY — keeps its original glow/gradient aesthetic
   ═══════════════════════════════════════════════════════════════ */

#boot-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: #06090e;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  transition: opacity 0.8s ease;
}

#boot-overlay.fade-out { opacity: 0; pointer-events: none; }

.boot-scanlines {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg, transparent 0px, transparent 2px,
    rgba(0,0,0,0.14) 2px, rgba(0,0,0,0.14) 4px
  );
  pointer-events: none;
  z-index: 0;
}

.boot-vignette {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 50%, rgba(0,0,0,0.65) 100%);
  pointer-events: none;
  z-index: 0;
}

.boot-inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 900px;
  padding: 44px 52px;
  font-family: 'IBM Plex Mono', 'Courier New', monospace;
}

.boot-brand { display: flex; align-items: center; gap: 18px; margin-bottom: 4px; }
.boot-brand img { height: 40px; filter: brightness(1.1) drop-shadow(0 0 8px rgba(244,121,32,0.45)); }
.boot-brand-text { flex: 1; }
.boot-brand-name { font-size: 11px; font-weight: 600; color: #f47920; letter-spacing: 3px; text-transform: uppercase; }
.boot-brand-sub  { font-size: 9px; color: rgba(244,121,32,0.4); letter-spacing: 2px; margin-top: 3px; text-transform: uppercase; }
.boot-brand-ver  { font-size: 9px; color: rgba(244,121,32,0.3); letter-spacing: 1.5px; text-align: right; line-height: 1.8; text-transform: uppercase; }

.boot-divider {
  height: 1px;
  background: linear-gradient(90deg, rgba(244,121,32,0.8) 0%, rgba(244,121,32,0.25) 65%, transparent 100%);
  margin: 14px 0 24px;
}

.boot-content { display: grid; grid-template-columns: 1fr 220px; gap: 40px; align-items: start; }

#boot-terminal { min-height: 190px; font-size: 11.5px; line-height: 2.15; }
.boot-line { display: flex; align-items: baseline; }
.blp { color: rgba(244,121,32,0.38); flex-shrink: 0; padding-right: 6px; }
.blt { color: rgba(244,121,32,0.82); flex: 1; }
.bls { font-size: 9px; font-weight: 600; padding: 1px 6px; border-radius: 2px; letter-spacing: 1.2px; flex-shrink: 0; }
.bls.ok   { color: #10b981; border: 1px solid rgba(16,185,129,0.4); }
.bls.warn { color: #f59e0b; border: 1px solid rgba(245,158,11,0.4); }
.bls.err  { color: #ef4444; border: 1px solid rgba(239,68,68,0.4); }

.boot-cursor { display: inline-block; width: 7px; height: 12px; background: #f47920; vertical-align: text-bottom; margin-left: 2px; animation: bootblink 0.75s step-end infinite; }
@keyframes bootblink { 0%,100% { opacity: 1; } 50% { opacity: 0; } }

.boot-tanks-panel { }
.boot-tanks-header { font-size: 8px; color: rgba(244,121,32,0.35); letter-spacing: 2.5px; text-transform: uppercase; margin-bottom: 16px; }
.boot-tanks-row { display: flex; gap: 16px; align-items: flex-end; }

.schematic-tank { display: flex; flex-direction: column; align-items: center; gap: 6px; opacity: 0; transform: translateY(8px); transition: opacity 0.4s ease, transform 0.4s ease; }
.schematic-tank.visible { opacity: 1; transform: translateY(0); }
.schematic-site-label { font-size: 8px; color: rgba(244,121,32,0.42); letter-spacing: 2px; text-transform: uppercase; }
.schematic-svg { overflow: visible; }
.schematic-pct { font-size: 10px; font-weight: 600; color: rgba(244,121,32,0.72); letter-spacing: 0.5px; }

.schematic-conn { display: flex; align-items: center; gap: 4px; font-size: 7.5px; color: transparent; letter-spacing: 1.2px; transition: color 0.6s ease; text-transform: uppercase; }
.schematic-conn.active { color: rgba(16,185,129,0.8); }
.schematic-conn-dot { width: 5px; height: 5px; border-radius: 50%; background: currentColor; flex-shrink: 0; }
.schematic-conn.active .schematic-conn-dot { animation: hud-pulse 1.5s ease-in-out infinite; }

.boot-footer { margin-top: 30px; padding-top: 16px; border-top: 1px solid rgba(244,121,32,0.1); }
.boot-progress-track { height: 2px; background: rgba(244,121,32,0.1); overflow: hidden; margin-bottom: 10px; }
.boot-progress-fill { height: 100%; width: 0%; background: #f47920; transition: width 0.35s ease; box-shadow: 0 0 12px rgba(244,121,32,0.75); }
.boot-status-row { display: flex; justify-content: space-between; font-size: 9px; color: rgba(244,121,32,0.4); letter-spacing: 1.2px; text-transform: uppercase; }
#boot-status-text { color: rgba(244,121,32,0.72); font-weight: 500; }
.boot-ready { text-align: center; font-size: 11px; font-weight: 600; color: #10b981; letter-spacing: 4px; margin-top: 16px; opacity: 0; transition: opacity 0.6s ease; text-transform: uppercase; }
.boot-ready.show { opacity: 1; }

@media (max-width: 768px) {
  .boot-inner { padding: 24px 20px; }
  .boot-content { grid-template-columns: 1fr; gap: 22px; }
  .boot-tanks-row { justify-content: center; }
  .boot-brand-ver { display: none; }
  #boot-terminal { font-size: 10.5px; }
}

/* ── Nav Auth UI ─────────────────────────────────────────────── */
#nav-user-badge {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--teal);
  border: 1px solid var(--orange-33);
  padding: 4px 10px;
  background: rgba(56,217,245,0.06);
  text-transform: uppercase;
  white-space: nowrap;
}

#nav-user-badge::before { content: '[ '; opacity: 0.6; }
#nav-user-badge::after  { content: ' ]'; opacity: 0.6; }

#logout-btn {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--orange);
  background: transparent;
  border: 1px solid var(--orange-33);
  padding: 4px 10px;
  cursor: pointer;
  text-transform: uppercase;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}

#logout-btn::before { content: '> '; opacity: 0.5; }

#logout-btn:hover {
  background: var(--orange);
  color: var(--bg);
}

#client-selector {
  display: none;
  align-items: center;
  gap: 4px;
}

.client-btn {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: rgba(232,118,44,0.55);
  background: transparent;
  border: 1px solid var(--orange-20);
  padding: 4px 10px;
  cursor: pointer;
  text-transform: uppercase;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
  white-space: nowrap;
}

.client-btn:hover,
.client-btn.active {
  color: var(--orange);
  border-color: var(--orange-33);
  background: var(--orange-10);
}

@media (max-width: 768px) {
  #nav-user-badge, #logout-btn { display: none !important; }
  #client-selector { display: none !important; }
}

/* ── AI Panel Footer ─────────────────────────────────────────── */
.ai-panel-footer {
  text-align: center;
  font-size: 9px;
  font-family: 'Courier New', monospace;
  color: #2a4060;
  padding: 6px 0 4px;
  letter-spacing: 0.08em;
  border-top: 1px solid #0d1e30;
}

/* ── Admin Portal ────────────────────────────────────────────── */
.admin-section {
  border: 1px solid var(--orange-20);
  background: var(--bg-card);
  margin-bottom: 1px;
}

.admin-section-header {
  padding: 12px 18px;
  border-bottom: 1px solid var(--orange-20);
  display: flex;
  align-items: center;
  gap: 16px;
}

.admin-section-title {
  font-size: 10px;
  font-weight: 600;
  color: var(--orange);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.admin-section-title::before { content: '> '; color: var(--teal); opacity: 0.6; }

.admin-section-sub {
  font-size: 10px;
  color: var(--teal);
  letter-spacing: 0.08em;
  opacity: 0.6;
  text-transform: uppercase;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 10px;
}

.admin-table th {
  padding: 8px 18px;
  text-align: left;
  color: var(--teal);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--orange-10);
  font-weight: 600;
}

.admin-table th::before { content: '// '; opacity: 0.4; }

.admin-table td {
  padding: 8px 18px;
  color: var(--orange);
  border-bottom: 1px solid var(--orange-10);
  letter-spacing: 0.04em;
  vertical-align: middle;
}

.admin-table tr:nth-child(odd) td  { background: var(--bg); }
.admin-table tr:nth-child(even) td { background: var(--bg-card); }
.admin-table tr:hover td           { background: var(--bg-row); }

.admin-btn {
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--teal);
  background: transparent;
  border: 1px solid var(--teal-40);
  padding: 3px 8px;
  cursor: pointer;
  text-transform: uppercase;
  transition: background 0.15s, color 0.15s;
}

.admin-btn:hover { background: var(--teal-15); color: var(--orange); }
.admin-btn.danger { color: var(--red); border-color: rgba(239,68,68,0.35); }
.admin-btn.danger:hover { background: rgba(239,68,68,0.12); }

.admin-form {
  padding: 12px 18px;
  display: flex;
  gap: 8px;
  align-items: center;
  border-top: 1px solid var(--orange-10);
  flex-wrap: wrap;
}

.admin-form input,
.admin-form select {
  background: var(--bg);
  border: 1px solid var(--orange-20);
  color: var(--orange);
  font-family: var(--mono);
  font-size: 10px;
  padding: 6px 10px;
  letter-spacing: 0.06em;
  outline: none;
  transition: border-color 0.15s;
  flex: 1;
  min-width: 120px;
}

.admin-form input:focus,
.admin-form select:focus { border-color: var(--orange-33); }
.admin-form input::placeholder { color: var(--teal); opacity: 0.35; }

.admin-form button[type="submit"] {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--orange);
  background: transparent;
  border: 1px solid var(--orange-33);
  padding: 6px 14px;
  cursor: pointer;
  text-transform: uppercase;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}

.admin-form button[type="submit"]:hover { background: var(--orange); color: var(--bg); }

.admin-profiles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 1px;
  background: var(--orange-10);
  margin: 0;
}

.admin-profile-card {
  background: var(--bg-card);
  padding: 16px 18px;
}

.admin-profile-card-name {
  font-size: 10px;
  font-weight: 600;
  color: var(--orange);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.admin-profile-card label {
  display: block;
  font-size: 9px;
  color: var(--teal);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 4px;
  margin-top: 8px;
}

.admin-profile-card textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--orange-20);
  color: var(--orange);
  font-family: var(--mono);
  font-size: 10px;
  padding: 6px 8px;
  resize: vertical;
  min-height: 52px;
  max-height: 110px;
  letter-spacing: 0.04em;
  outline: none;
  transition: border-color 0.15s;
  line-height: 1.5;
}

.admin-profile-card textarea:focus { border-color: var(--orange-33); }
.admin-profile-card textarea::placeholder { color: var(--teal); opacity: 0.3; }

.admin-profile-save-btn {
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 600;
  color: var(--teal);
  background: transparent;
  border: 1px solid var(--teal-40);
  padding: 4px 10px;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: background 0.15s, color 0.15s;
}

.admin-profile-save-btn:hover { background: var(--teal-15); color: var(--orange); }

.admin-ai-log-wrap {
  overflow-x: auto;
}

.admin-ai-log-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 10px;
  min-width: 800px;
}

.admin-ai-log-table th {
  padding: 8px 14px;
  text-align: left;
  color: var(--teal);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--orange-10);
  font-weight: 600;
  white-space: nowrap;
}

.admin-ai-log-table td {
  padding: 7px 14px;
  border-bottom: 1px solid var(--orange-10);
  color: var(--teal);
  vertical-align: top;
  letter-spacing: 0.03em;
  max-width: 260px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.admin-ai-log-table td.msg { color: var(--orange); }
.admin-ai-log-table tr:nth-child(odd) td  { background: var(--bg); }
.admin-ai-log-table tr:nth-child(even) td { background: var(--bg-card); }