/*
 * DEEP OCTOBER THEME — a Cold War submarine command visual theme.
 *
 * Inspired by the claustrophobic crimson glow of combat stations,
 * the cold blue wash of sonar displays, and the amber warmth
 * of instrument panels deep beneath the North Atlantic.
 *
 * Usage:
 *   <link rel="stylesheet" href="deep-october-theme.css">
 *   <canvas id="do-canvas"></canvas>             <!-- optional: sonar depth display -->
 *   <script src="sonar-depth.js"></script>        <!-- optional: powers the canvas -->
 *
 * Then use the CSS classes and variables documented below.
 * All prefixed with `do-` to avoid collisions.
 *
 * Everything is namespaced under :root variables so you can override
 * colors without touching this file.
 */

/* ═══════════════════════════════════════════════════════════════
   FONTS — self-hosted, no external dependencies
   ═══════════════════════════════════════════════════════════════ */

@font-face {
  font-family: 'Orbitron';
  font-style: normal;
  font-weight: 400 900;
  font-display: swap;
  src: url(fonts/orbitron-latin.woff2) format('woff2');
}

@font-face {
  font-family: 'Share Tech Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/share-tech-mono-latin.woff2) format('woff2');
}


/* ═══════════════════════════════════════════════════════════════
   COLOR PALETTE — override any of these in your own stylesheet
   ═══════════════════════════════════════════════════════════════ */

:root {
  /* ── Primary crimson (combat stations / red alert identity) ── */
  --do-crimson:         #C43030;
  --do-crimson-bright:  #E84040;
  --do-crimson-dim:     #8C2020;
  --do-crimson-dark:    #3A0C0C;

  /* ── Cold steel blue (sonar / depth / ocean) ─────────────── */
  --do-steel:           #4488BB;
  --do-steel-dim:       #2C6690;

  /* ── Warm amber (instrument panel glow) ──────────────────── */
  --do-amber:           #D4A030;
  --do-amber-dim:       #A07820;

  /* ── Sonar green (readouts / depth displays) ─────────────── */
  --do-green:           #30AA70;
  --do-green-dim:       #208858;

  /* ── Supplemental ────────────────────────────────────────── */
  --do-orange:          #CC6620;

  /* ── Backgrounds (near-black, cold blue-charcoal tint) ──── */
  --do-bg:              #0A0C10;
  --do-bg-2:            #0E1016;
  --do-bg-3:            #12141C;
  --do-panel:           #0C0E14;
  --do-panel-tint:      rgba(196, 48, 48, 0.05);

  /* ── Borders ───────────────────────────────────────────────── */
  --do-border:          rgba(196, 48, 48, 0.22);
  --do-border-bright:   rgba(196, 48, 48, 0.55);
  --do-border-steel:    rgba(68, 136, 187, 0.30);

  /* ── Text ──────────────────────────────────────────────────── */
  --do-text:            #C0C8D8;
  --do-text-dim:        #687080;

  /* ── Semantic (override per-app) ───────────────────────────── */
  --do-success:         #30AA70;
  --do-danger:          #C43030;
  --do-warning:         #D4A030;
  --do-info:            #4488BB;
  --do-muted:           #445566;

  /* ── Typography ────────────────────────────────────────────── */
  --do-font-display:    'Orbitron', sans-serif;
  --do-font-mono:       'Share Tech Mono', monospace;

  /* ── Effects ───────────────────────────────────────────────── */
  --do-glow-crimson:    0 0 15px rgba(196, 48, 48, 0.6), 0 0 40px rgba(196, 48, 48, 0.15);
  --do-glow-steel:      0 0 15px rgba(68, 136, 187, 0.6), 0 0 40px rgba(68, 136, 187, 0.15);
  --do-glow-amber:      0 0 15px rgba(212, 160, 48, 0.6), 0 0 40px rgba(212, 160, 48, 0.15);
  --do-glow-green:      0 0 15px rgba(48, 170, 112, 0.6), 0 0 40px rgba(48, 170, 112, 0.15);
  --do-scanline-opacity: 0.05;
  --do-canvas-opacity:  0.35;
}


/* ═══════════════════════════════════════════════════════════════
   RESET + BASE
   ═══════════════════════════════════════════════════════════════ */

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

.do-base {
  background: var(--do-bg);
  color: var(--do-text);
  font-family: var(--do-font-mono);
  min-height: 100vh;
  overflow-x: hidden;
}


/* ═══════════════════════════════════════════════════════════════
   SONAR DEPTH CANVAS
   Apply to a <canvas id="do-canvas"> behind your content.
   ═══════════════════════════════════════════════════════════════ */

.do-sonar-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  opacity: var(--do-canvas-opacity);
  pointer-events: none;
  z-index: 0;
}


/* ═══════════════════════════════════════════════════════════════
   SCANLINE OVERLAY
   Add class="do-scanlines" to <body> or a wrapper element.
   ═══════════════════════════════════════════════════════════════ */

.do-scanlines::after {
  content: '';
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, var(--do-scanline-opacity)) 2px,
    rgba(0, 0, 0, var(--do-scanline-opacity)) 4px
  );
  pointer-events: none;
  z-index: 1;
}


/* ═══════════════════════════════════════════════════════════════
   PRESSURE VIGNETTE OVERLAY
   Add class="do-pressure" to <body> for darkened-edge depth effect.
   ═══════════════════════════════════════════════════════════════ */

.do-pressure::before {
  content: '';
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: radial-gradient(
    ellipse at center,
    transparent 55%,
    rgba(0, 4, 12, 0.35) 100%
  );
  pointer-events: none;
  z-index: 1;
}


/* ═══════════════════════════════════════════════════════════════
   CONTENT CONTAINER
   ═══════════════════════════════════════════════════════════════ */

.do-app {
  position: relative;
  z-index: 2;
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 16px 40px;
}


/* ═══════════════════════════════════════════════════════════════
   TYPOGRAPHY
   ═══════════════════════════════════════════════════════════════ */

.do-display {
  font-family: var(--do-font-display);
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--do-crimson);
}

.do-title {
  font-family: var(--do-font-display);
  font-size: 28px;
  font-weight: 900;
  color: var(--do-crimson);
  text-shadow: var(--do-glow-crimson);
  letter-spacing: 4px;
  line-height: 1;
}

.do-title .do-accent { color: var(--do-steel); text-shadow: var(--do-glow-steel); }
.do-title .do-amber  { color: var(--do-amber); text-shadow: var(--do-glow-amber); }
.do-title .do-green  { color: var(--do-green); text-shadow: var(--do-glow-green); }

.do-subtitle {
  font-size: 10px;
  color: var(--do-crimson-dim);
  letter-spacing: 6px;
  text-transform: uppercase;
}

.do-heading {
  font-family: var(--do-font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 4px;
  color: var(--do-crimson);
}

.do-dim { color: var(--do-text-dim); }


/* ═══════════════════════════════════════════════════════════════
   PANELS + CARDS
   Crimson top-edge glow + sweeping sonar line on hover.
   ═══════════════════════════════════════════════════════════════ */

.do-panel {
  background: var(--do-panel);
  border: 1px solid var(--do-border);
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s;
}

.do-panel:hover {
  border-color: var(--do-border-bright);
}

/* Top-edge crimson glow on hover */
.do-panel::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--do-crimson), var(--do-crimson-bright), var(--do-crimson), transparent);
  opacity: 0;
  transition: opacity 0.2s;
  z-index: 1;
}

.do-panel:hover::before,
.do-panel.do-active::before { opacity: 1; }

/* Sonar sweep line — horizontal pass on hover */
.do-panel::after {
  content: '';
  position: absolute;
  left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(196, 48, 48, 0.3), transparent);
  top: 0;
  opacity: 0;
  pointer-events: none;
  z-index: 1;
}

.do-panel:hover::after {
  animation: do-sweep 5s ease-in-out infinite;
}

/* Steel blue panel variant */
.do-panel.do-steel {
  border-color: var(--do-border-steel);
}

.do-panel.do-steel::before {
  background: linear-gradient(90deg, transparent, var(--do-steel), var(--do-steel-dim), var(--do-steel), transparent);
}

.do-panel.do-steel::after {
  background: linear-gradient(90deg, transparent, rgba(68, 136, 187, 0.3), transparent);
}

.do-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background: rgba(196, 48, 48, 0.04);
  border-bottom: 1px solid var(--do-border);
  flex-wrap: wrap;
  gap: 8px;
}

.do-panel-body {
  padding: 16px;
}

/* Glass-effect panel — frosted viewport */
.do-glass {
  background: rgba(8, 10, 14, 0.88);
  backdrop-filter: blur(3px);
  border: 1px solid var(--do-border);
}


/* ═══════════════════════════════════════════════════════════════
   TORPEDO TUBE STATUS — unique to this theme
   Numbered tube indicators inspired by submarine ordnance bays.
   ═══════════════════════════════════════════════════════════════ */

.do-torpedo-bank {
  display: flex;
  gap: 8px;
}

.do-torpedo-tube {
  width: 56px;
  text-align: center;
  background: var(--do-panel);
  border: 1px solid var(--do-border);
  padding: 10px 6px 8px;
  position: relative;
  transition: all 0.3s;
}

.do-torpedo-tube::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--do-crimson-dim);
  opacity: 0.3;
}

.do-torpedo-num {
  font-family: var(--do-font-display);
  font-size: 20px;
  font-weight: 900;
  color: var(--do-crimson);
  text-shadow: 0 0 10px rgba(196, 48, 48, 0.5);
  display: block;
  line-height: 1;
}

.do-torpedo-label {
  font-size: 7px;
  color: var(--do-text-dim);
  letter-spacing: 2px;
  display: block;
  margin-top: 4px;
}

/* Armed state — pulsing red glow */
.do-torpedo-tube.do-armed {
  border-color: var(--do-crimson);
  box-shadow: inset 0 0 20px rgba(196, 48, 48, 0.1);
}

.do-torpedo-tube.do-armed::before {
  background: var(--do-crimson-bright);
  opacity: 1;
  box-shadow: 0 0 8px rgba(196, 48, 48, 0.6);
}

.do-torpedo-tube.do-armed .do-torpedo-num {
  animation: do-pulse 2s ease-in-out infinite;
}

/* Empty state */
.do-torpedo-tube.do-empty {
  border-color: rgba(80, 88, 104, 0.15);
}

.do-torpedo-tube.do-empty::before {
  background: var(--do-muted);
  opacity: 0.15;
}

.do-torpedo-tube.do-empty .do-torpedo-num {
  color: var(--do-muted);
  text-shadow: none;
}


/* ═══════════════════════════════════════════════════════════════
   DEPTH GAUGE — vertical pressure/depth meter
   ═══════════════════════════════════════════════════════════════ */

.do-depth-gauge {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 120px;
}

.do-depth-bar {
  flex: 1;
  background: rgba(68, 136, 187, 0.06);
  border: 1px solid rgba(68, 136, 187, 0.12);
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.do-depth-fill {
  background: linear-gradient(0deg, var(--do-steel), var(--do-steel-dim));
  transition: height 0.5s ease;
  position: relative;
}

.do-depth-fill::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--do-steel);
  box-shadow: 0 0 8px rgba(68, 136, 187, 0.6);
}

.do-depth-fill.do-danger {
  background: linear-gradient(0deg, var(--do-crimson), var(--do-crimson-dim));
}

.do-depth-fill.do-danger::after {
  background: var(--do-crimson);
  box-shadow: 0 0 8px rgba(196, 48, 48, 0.6);
}

.do-depth-label {
  font-size: 7px;
  color: var(--do-text-dim);
  letter-spacing: 1px;
  text-align: center;
  padding: 4px 2px 0;
  position: absolute;
  bottom: -18px;
  left: 0; right: 0;
}


/* ═══════════════════════════════════════════════════════════════
   SONAR CONTACT — blinking contact blips
   ═══════════════════════════════════════════════════════════════ */

.do-contact-grid {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.do-contact {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: rgba(68, 136, 187, 0.04);
  border: 1px solid rgba(68, 136, 187, 0.12);
}

.do-contact-blip {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--do-steel);
  box-shadow: 0 0 6px var(--do-steel);
  animation: do-sonar-blink 3s ease-in-out infinite;
}

.do-contact-blip.do-hostile {
  background: var(--do-crimson);
  box-shadow: 0 0 6px var(--do-crimson);
  animation: do-sonar-blink 1.2s ease-in-out infinite;
}

.do-contact-blip.do-friendly {
  background: var(--do-green);
  box-shadow: 0 0 6px var(--do-green);
}

.do-contact-id {
  font-family: var(--do-font-display);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--do-steel);
}

.do-contact-id.do-hostile { color: var(--do-crimson); }
.do-contact-id.do-friendly { color: var(--do-green); }

.do-contact-class {
  font-size: 9px;
  color: var(--do-text-dim);
  letter-spacing: 1px;
}


/* ═══════════════════════════════════════════════════════════════
   COMMAND BANNER — classified information strip
   ═══════════════════════════════════════════════════════════════ */

.do-command-banner {
  font-family: var(--do-font-display);
  font-size: 9px;
  letter-spacing: 3px;
  text-align: center;
  padding: 6px 16px;
  color: var(--do-crimson);
  background: rgba(196, 48, 48, 0.05);
  border: 1px solid rgba(196, 48, 48, 0.15);
}

.do-command-banner.do-steel {
  color: var(--do-steel);
  background: rgba(68, 136, 187, 0.05);
  border-color: rgba(68, 136, 187, 0.15);
}


/* ═══════════════════════════════════════════════════════════════
   BADGES + CHIPS
   Torpedo-shaped (pointed ends) for submarine hull silhouette.
   ═══════════════════════════════════════════════════════════════ */

.do-badge {
  font-family: var(--do-font-display);
  font-size: 9px;
  font-weight: 700;
  padding: 3px 14px;
  letter-spacing: 1px;
  display: inline-block;
  /* Torpedo / pointed-end shape */
  clip-path: polygon(8px 0%, calc(100% - 8px) 0%, 100% 50%, calc(100% - 8px) 100%, 8px 100%, 0% 50%);
}

.do-badge-crimson { background: var(--do-crimson);  color: #fff; }
.do-badge-steel   { background: var(--do-steel);    color: #000; }
.do-badge-amber   { background: var(--do-amber);    color: #000; }
.do-badge-green   { background: var(--do-green);    color: #000; }
.do-badge-orange  { background: var(--do-orange);   color: #000; }

.do-badge-lg {
  font-size: 11px;
  padding: 4px 18px;
  letter-spacing: 2px;
  clip-path: polygon(10px 0%, calc(100% - 10px) 0%, 100% 50%, calc(100% - 10px) 100%, 10px 100%, 0% 50%);
}

.do-chip {
  font-size: 10px;
  letter-spacing: 1px;
  color: var(--do-text-dim);
  background: rgba(196, 48, 48, 0.05);
  border: 1px solid rgba(196, 48, 48, 0.15);
  padding: 2px 8px;
  display: inline-block;
}

.do-chip.do-steel {
  color: var(--do-steel-dim);
  border-color: rgba(68, 136, 187, 0.15);
}


/* ═══════════════════════════════════════════════════════════════
   TABS
   Periscope viewport angle — slanted cut on bottom-left.
   ═══════════════════════════════════════════════════════════════ */

.do-tab-bar {
  display: flex;
  gap: 2px;
  border-bottom: 1px solid var(--do-border);
  flex-wrap: wrap;
}

.do-tab {
  font-family: var(--do-font-display);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 2px;
  padding: 10px 20px;
  border: 1px solid transparent;
  border-bottom: none;
  cursor: pointer;
  text-transform: uppercase;
  transition: all 0.15s;
  color: var(--do-text-dim);
  background: transparent;
  position: relative;
  bottom: -1px;
  /* Periscope viewport — angled bottom-left */
  clip-path: polygon(0 0, 100% 0, 100% 100%, 12px 100%, 0 calc(100% - 8px));
}

.do-tab:hover {
  color: var(--do-crimson);
  border-color: var(--do-border);
  background: var(--do-panel-tint);
}

.do-tab.do-active {
  color: #fff;
  background: var(--do-crimson);
  border-color: var(--do-crimson);
}


/* ═══════════════════════════════════════════════════════════════
   BUTTONS
   ═══════════════════════════════════════════════════════════════ */

.do-btn {
  display: inline-block;
  font-family: var(--do-font-display);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 2px;
  padding: 8px 22px;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.2s;
  border: 1px solid var(--do-border);
  background: transparent;
  color: var(--do-text-dim);
}

.do-btn:hover {
  color: var(--do-crimson);
  background: var(--do-panel-tint);
  border-color: var(--do-border-bright);
  box-shadow: var(--do-glow-crimson);
}

.do-btn.do-primary {
  background: var(--do-crimson);
  color: #fff;
  border-color: var(--do-crimson);
}

.do-btn.do-primary:hover {
  background: var(--do-crimson-bright);
  box-shadow: var(--do-glow-crimson);
}

.do-btn.do-danger {
  border-color: rgba(196, 48, 48, 0.4);
  color: var(--do-crimson-dim);
}

.do-btn.do-danger:hover {
  color: var(--do-crimson-bright);
  background: rgba(196, 48, 48, 0.08);
  border-color: var(--do-crimson);
  box-shadow: var(--do-glow-crimson);
}

.do-btn.do-steel {
  border-color: var(--do-border-steel);
  color: var(--do-steel-dim);
}

.do-btn.do-steel:hover {
  color: var(--do-steel);
  background: rgba(68, 136, 187, 0.06);
  border-color: var(--do-steel);
  box-shadow: var(--do-glow-steel);
}


/* ═══════════════════════════════════════════════════════════════
   SECTION HEADERS
   ═══════════════════════════════════════════════════════════════ */

.do-section-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  padding: 12px 16px;
  background: linear-gradient(90deg, rgba(196, 48, 48, 0.08), transparent);
  border-left: 3px solid var(--do-crimson);
}

/* Steel blue variant */
.do-section-header.do-steel {
  background: linear-gradient(90deg, rgba(68, 136, 187, 0.08), transparent);
  border-left-color: var(--do-steel);
}

/* Section title with trailing line */
.do-section-title {
  font-family: var(--do-font-display);
  font-size: 11px;
  font-weight: 700;
  color: var(--do-crimson-dim);
  letter-spacing: 3px;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 8px;
}

.do-section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--do-border);
}


/* ═══════════════════════════════════════════════════════════════
   DATA FIELDS
   ═══════════════════════════════════════════════════════════════ */

.do-field {
  background: rgba(196, 48, 48, 0.03);
  border: 1px solid rgba(196, 48, 48, 0.1);
  padding: 8px 10px;
}

.do-field-label {
  font-size: 10px;
  color: var(--do-text-dim);
  letter-spacing: 2px;
  text-transform: uppercase;
  display: block;
  margin-bottom: 3px;
}

.do-field-value {
  font-size: 12px;
  color: var(--do-text);
  font-weight: 600;
}

.do-field-value.do-crimson {
  color: var(--do-crimson);
  font-family: var(--do-font-display);
  font-size: 11px;
}

.do-field-value.do-steel {
  color: var(--do-steel);
  font-family: var(--do-font-display);
  font-size: 11px;
}

.do-field-value.do-amber {
  color: var(--do-amber);
  font-family: var(--do-font-display);
  font-size: 11px;
}


/* ═══════════════════════════════════════════════════════════════
   STAT BARS
   ═══════════════════════════════════════════════════════════════ */

.do-stat-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 7px;
}

.do-stat-label {
  font-size: 11px;
  color: var(--do-text-dim);
  letter-spacing: 1px;
  width: 100px;
  flex-shrink: 0;
  text-align: right;
}

.do-stat-track {
  flex: 1;
  height: 6px;
  background: rgba(196, 48, 48, 0.06);
  border: 1px solid rgba(196, 48, 48, 0.12);
  position: relative;
  overflow: hidden;
}

.do-stat-fill {
  height: 100%;
  background: var(--do-crimson);
  transition: width 0.5s ease;
  box-shadow: 0 0 6px rgba(196, 48, 48, 0.4);
}

.do-stat-fill.do-steel   { background: var(--do-steel);  box-shadow: 0 0 6px rgba(68, 136, 187, 0.4); }
.do-stat-fill.do-green   { background: var(--do-green);  box-shadow: 0 0 6px rgba(48, 170, 112, 0.4); }
.do-stat-fill.do-amber   { background: var(--do-amber);  box-shadow: 0 0 6px rgba(212, 160, 48, 0.4); }
.do-stat-fill.do-orange  { background: var(--do-orange); box-shadow: 0 0 6px rgba(204, 102, 32, 0.4); }

.do-stat-value {
  font-family: var(--do-font-display);
  font-size: 9px;
  color: var(--do-crimson);
  width: 50px;
  flex-shrink: 0;
}


/* ═══════════════════════════════════════════════════════════════
   TABLES
   ═══════════════════════════════════════════════════════════════ */

.do-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 11px;
}

.do-table th {
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--do-text-dim);
  text-transform: uppercase;
  padding: 5px 6px;
  text-align: left;
  border-bottom: 1px solid var(--do-border);
  font-weight: 400;
}

.do-table td {
  padding: 5px 6px;
  border-bottom: 1px solid rgba(196, 48, 48, 0.05);
  vertical-align: top;
  line-height: 1.4;
}

.do-table tr:hover td {
  background: rgba(196, 48, 48, 0.03);
}


/* ═══════════════════════════════════════════════════════════════
   STATUS INDICATORS
   ═══════════════════════════════════════════════════════════════ */

.do-status-bar {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 8px 0;
  font-size: 10px;
  color: var(--do-text-dim);
  letter-spacing: 2px;
  flex-wrap: wrap;
}

.do-status-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--do-crimson);
  box-shadow: 0 0 8px var(--do-crimson);
  animation: do-sonar-blink 1.5s ease-in-out infinite;
}

.do-status-dot.do-steel  { background: var(--do-steel);  box-shadow: 0 0 8px var(--do-steel); }
.do-status-dot.do-green  { background: var(--do-green);  box-shadow: 0 0 8px var(--do-green); }
.do-status-dot.do-amber  { background: var(--do-amber);  box-shadow: 0 0 8px var(--do-amber); }


/* ═══════════════════════════════════════════════════════════════
   DIVIDERS
   ═══════════════════════════════════════════════════════════════ */

.do-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--do-crimson), var(--do-crimson-bright), var(--do-crimson), transparent);
  margin: 20px 0;
}

.do-divider-dim {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--do-crimson-dim), transparent);
  margin: 20px 0;
  opacity: 0.3;
}

/* Steel blue divider */
.do-divider.do-steel {
  background: linear-gradient(90deg, transparent, var(--do-steel), var(--do-steel-dim), var(--do-steel), transparent);
}

/* Sonar ping divider — pulses outward from center */
.do-divider-sonar {
  height: 1px;
  margin: 20px 0;
  position: relative;
  background: var(--do-border);
}

.do-divider-sonar::before {
  content: '';
  position: absolute;
  top: -3px;
  left: 50%;
  width: 7px;
  height: 7px;
  background: var(--do-steel);
  border-radius: 50%;
  transform: translateX(-50%);
  box-shadow: 0 0 6px var(--do-steel);
  animation: do-sonar-blink 3s ease-in-out infinite;
}

.do-divider-sonar::after {
  content: '';
  position: absolute;
  top: 0; left: 50%;
  width: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--do-steel), transparent);
  animation: do-sonar-expand 3s ease-out infinite;
}


/* ═══════════════════════════════════════════════════════════════
   COUNTDOWN / NUMERIC DISPLAYS
   ═══════════════════════════════════════════════════════════════ */

.do-countdown {
  display: flex;
  gap: 8px;
}

.do-cd-unit {
  text-align: center;
  background: var(--do-panel-tint);
  border: 1px solid var(--do-border);
  padding: 6px 12px;
  position: relative;
}

/* Small crimson dot in top-left corner */
.do-cd-unit::before {
  content: '';
  position: absolute;
  top: 3px; left: 3px;
  width: 3px; height: 3px;
  background: var(--do-crimson);
  border-radius: 50%;
  box-shadow: 0 0 4px var(--do-crimson);
  animation: do-sonar-blink 2s ease-in-out infinite;
}

.do-cd-num {
  font-family: var(--do-font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--do-crimson);
  text-shadow: 0 0 10px rgba(196, 48, 48, 0.5);
  display: block;
  line-height: 1;
}

.do-cd-label {
  font-size: 7px;
  color: var(--do-text-dim);
  letter-spacing: 2px;
}


/* ═══════════════════════════════════════════════════════════════
   SCROLLBAR
   ═══════════════════════════════════════════════════════════════ */

.do-base::-webkit-scrollbar,
.do-scrollbar::-webkit-scrollbar { width: 6px; }

.do-base::-webkit-scrollbar-track,
.do-scrollbar::-webkit-scrollbar-track { background: var(--do-bg); }

.do-base::-webkit-scrollbar-thumb,
.do-scrollbar::-webkit-scrollbar-thumb { background: var(--do-crimson-dim); }

.do-base::-webkit-scrollbar-thumb:hover,
.do-scrollbar::-webkit-scrollbar-thumb:hover { background: var(--do-crimson); }


/* ═══════════════════════════════════════════════════════════════
   ANIMATIONS
   ═══════════════════════════════════════════════════════════════ */

/* Sonar blink — slow fade like a sonar ping echo */
@keyframes do-sonar-blink {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.15; }
}

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

/* Sonar ping — title brightens left-to-right like a sweep */
@keyframes do-ping {
  0%, 100%  { text-shadow: var(--do-glow-crimson); }
  15%       { text-shadow: 0 0 20px rgba(196, 48, 48, 0.8), 0 0 60px rgba(196, 48, 48, 0.3); filter: brightness(1.3); }
  30%       { text-shadow: var(--do-glow-crimson); }
}

/* Sonar sweep line through panels */
@keyframes do-sweep {
  0%   { top: 0;    opacity: 0; }
  5%   { opacity: 0.3; }
  95%  { opacity: 0.3; }
  100% { top: 100%; opacity: 0; }
}

/* Sonar divider ping expanding outward */
@keyframes do-sonar-expand {
  0%   { left: 50%; width: 0; opacity: 0.8; }
  100% { left: 10%; width: 80%; opacity: 0; }
}

/* Depth pressure shift — slow vertical drift */
@keyframes do-depth-shift {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-2px); }
}

@keyframes do-slide-down {
  from { opacity: 0; transform: translateY(-10px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes do-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.do-ping      { animation: do-ping 8s ease-in-out infinite; }
.do-pulse     { animation: do-pulse 4s linear infinite; }
.do-slide-in  { animation: do-slide-down 0.2s ease; }
.do-fade-in   { animation: do-fade-in 0.4s ease; }


/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════════ */

@media (max-width: 768px) {
  .do-title { font-size: 20px; }
  .do-heading { font-size: 11px; letter-spacing: 2px; }
}