/* ==========================================================================
   YP 2016 ??CANON EDITION (Fixed-Stage Minimalist Studio Hub)
   Palette: Obsidian (#0A0A0A), Vessel (#141416), Zinc (#27272A), Bone (#FAFAFA)
   Interaction: Cursor-reactive spectral emergence & fixed-stage object ascent
   ========================================================================== */

@font-face {
  font-family: 'Hanken Grotesk';
  src: url('./fonts/hanken-grotesk-400.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Hanken Grotesk';
  src: url('./fonts/hanken-grotesk-500.ttf') format('truetype');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Hanken Grotesk';
  src: url('./fonts/hanken-grotesk-600.ttf') format('truetype');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Hanken Grotesk';
  src: url('./fonts/hanken-grotesk-700.ttf') format('truetype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Azeret Mono';
  src: url('./fonts/azeret-mono-400.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Azeret Mono';
  src: url('./fonts/azeret-mono-500.ttf') format('truetype');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

:root {
  /* Core Canon Monochrome Surfaces */
  --bg-obsidian: #0A0A0A;
  --surface-vessel: #141416;
  --border-subtle: #1F1F23;
  --border-zinc: #27272A;
  --border-bright: #3F3F46;

  /* Typography Hierarchy (WCAG AA+ Compliant against #0A0A0A & #141416) */
  --text-bone: #FAFAFA;
  --text-ash: #A1A1AA;
  --text-muted: #8E8E99;

  /* Latent Chromatic Signatures (Dormant at rest; emerge on cursor motion/hover) */
  --hue-cyan: #38BDF8;
  --hue-cyan-soft: rgba(56, 189, 248, 0.18);
  --hue-amber: #F59E0B;
  --hue-amber-soft: rgba(245, 158, 11, 0.18);
  --hue-violet: #A78BFA;
  --hue-violet-soft: rgba(167, 139, 250, 0.18);
  --hue-emerald: #34D399;

  /* Dynamic Cursor & Scroll Variables (Updated via rAF in app.js) */
  --mx: 50vw;
  --my: 50vh;
  --mx-norm: 0.5;
  --my-norm: 0.5;
  --m-energy: 0;
  --scroll-progress: 0;

  /* Typography Families */
  --font-sans: 'Hanken Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Azeret Mono', monospace;

  /* Emil Kowalski Precision Easing Curves */
  --ease-out-quart: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  background-color: var(--bg-obsidian);
  color: var(--text-bone);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scrollbar-color: var(--border-zinc) var(--bg-obsidian);
  scrollbar-width: thin;
}

::selection {
  background: var(--text-bone);
  color: var(--bg-obsidian);
}

body {
  background-color: var(--bg-obsidian);
  color: var(--text-bone);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ==========================================================================
   1. FIXED VIEWPORT STAGE (Screen stays locked while objects ascend)
   ========================================================================== */

.fixed-stage {
  display: contents;
}

/* Subtle Cursor-Reactive Chromatic Aura in the Void */
.ambient-aura {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: calc(0.16 + var(--m-energy) * 0.78);
  transition: opacity 420ms var(--ease-out-quart);
  background:
    radial-gradient(
      540px circle at var(--mx) var(--my),
      rgba(56, 189, 248, 0.1) 0%,
      rgba(167, 139, 250, 0.07) 38%,
      rgba(245, 158, 11, 0.04) 68%,
      transparent 100%
    ),
    radial-gradient(
      220px circle at var(--mx) var(--my),
      rgba(250, 250, 250, 0.04) 0%,
      transparent 80%
    );
}

/* Architectural Standby Frame & Crosshairs (Locked on screen) */
.stage-frame {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

.hairline {
  position: absolute;
  background: var(--border-subtle);
  opacity: 0.55;
}

.hairline--v {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  transform: translateX(-0.5px);
  background: linear-gradient(
    180deg,
    transparent 0%,
    rgba(39, 39, 42, 0.55) 18%,
    rgba(56, 189, 248, calc(0.08 + var(--m-energy) * 0.32)) 48%,
    rgba(39, 39, 42, 0.55) 82%,
    transparent 100%
  );
}

.hairline--h {
  left: 0;
  right: 0;
  top: 44%;
  height: 1px;
  transform: translateY(-0.5px);
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(39, 39, 42, 0.55) 18%,
    rgba(167, 139, 250, calc(0.08 + var(--m-energy) * 0.32)) 50%,
    rgba(39, 39, 42, 0.55) 82%,
    transparent 100%
  );
}

/* Fixed Registration Corner Brackets */
.frame-corner {
  position: absolute;
  width: 14px;
  height: 14px;
  border-color: var(--border-bright);
  opacity: 0.65;
  transition: border-color 280ms var(--ease-out-quart);
}

body[data-color-active="true"] .frame-corner {
  border-color: rgba(56, 189, 248, 0.5);
}

.frame-corner--tl {
  top: 96px;
  left: clamp(28px, 5vw, 68px);
  border-top: 1px solid;
  border-left: 1px solid;
}

.frame-corner--tr {
  top: 96px;
  right: clamp(28px, 5vw, 68px);
  border-top: 1px solid;
  border-right: 1px solid;
}

.frame-corner--bl {
  bottom: 96px;
  left: clamp(28px, 5vw, 68px);
  border-bottom: 1px solid;
  border-left: 1px solid;
}

.frame-corner--br {
  bottom: 96px;
  right: clamp(28px, 5vw, 68px);
  border-bottom: 1px solid;
  border-right: 1px solid;
}

/* ==========================================================================
   2. PINNED TOP HUD (Always above ascending stream)
   ========================================================================== */

.hud-top {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 30;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: clamp(24px, 3.2vw, 38px) clamp(28px, 5vw, 68px) 24px;
  background: linear-gradient(
    180deg,
    rgba(10, 10, 10, 0.94) 30%,
    rgba(10, 10, 10, 0.6) 72%,
    transparent 100%
  );
  pointer-events: none;
}

.hud-brand {
  pointer-events: auto;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  text-decoration: none;
  color: var(--text-bone);
  padding: 6px 10px;
  margin-left: -10px;
  border-radius: 8px;
  transition: scale 180ms var(--ease-out-quart), background-color 200ms var(--ease-out-quart);
}

.hud-brand:hover {
  background-color: rgba(250, 250, 250, 0.04);
}

.hud-brand:focus-visible {
  outline: 2px solid var(--hue-cyan);
  outline-offset: 3px;
}

.hud-brand:active {
  scale: 0.97;
}

.hud-brand__yp {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.03em;
  color: var(--text-bone);
}

.hud-brand__year {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text-ash);
  font-variant-numeric: tabular-nums;
}

.hud-center-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.tag-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--border-bright);
}

.hud-status {
  pointer-events: auto;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  background: rgba(20, 20, 22, 0.85);
  border: 1px solid var(--border-zinc);
  border-radius: 999px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-ash);
  font-variant-numeric: tabular-nums;
  transition: border-color 260ms var(--ease-out-quart), box-shadow 260ms var(--ease-out-quart);
}

.hud-status:hover {
  border-color: rgba(56, 189, 248, 0.55);
  box-shadow: 0 0 24px -4px rgba(56, 189, 248, 0.25);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--text-bone);
  box-shadow: 0 0 10px rgba(250, 250, 250, 0.7);
  transition: background-color 300ms var(--ease-out-quart), box-shadow 300ms var(--ease-out-quart);
  animation: standby-pulse 3.2s ease-in-out infinite;
}

body[data-color-active="true"] .status-dot {
  background-color: var(--hue-cyan);
  box-shadow: 0 0 12px var(--hue-cyan);
}

@keyframes standby-pulse {
  0%, 100% {
    opacity: 0.95;
    scale: 1;
  }
  50% {
    opacity: 0.32;
    scale: 0.86;
  }
}

.status-label {
  color: var(--text-bone);
  font-weight: 500;
}

.status-code {
  color: var(--text-muted);
  padding-left: 8px;
  border-left: 1px solid var(--border-zinc);
}

/* ==========================================================================
   3. PINNED CENTER MONUMENT (Solid Bone-White #FAFAFA + Optical Rim Halo)
   ========================================================================== */

.monument-lock {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 12;
  pointer-events: none;
  /* Translates smoothly into the upper-center berth with clean clearance above vessels */
  translate:
    calc((var(--mx-norm) - 0.5) * -12px)
    calc((var(--my-norm) - 0.5) * -8px - var(--scroll-progress) * 23vh);
  opacity: calc(1 - var(--scroll-progress) * 0.08);
  will-change: translate, opacity;
}

.monument-mark {
  pointer-events: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 20px 44px;
  border-radius: 24px;
  position: relative;
  cursor: default;
  user-select: none;
}

/* Ambient Optical Prism Backlight behind solid #FAFAFA glyphs */
.monument-mark::before {
  content: '';
  position: absolute;
  inset: -16px -36px;
  border-radius: 36px;
  pointer-events: none;
  z-index: -1;
  opacity: calc(var(--m-energy) * 0.85);
  transition: opacity 320ms var(--ease-out-quart);
  background: radial-gradient(
    ellipse at calc(35% + var(--mx-norm) * 30%) calc(35% + var(--my-norm) * 30%),
    rgba(56, 189, 248, 0.16) 0%,
    rgba(167, 139, 250, 0.12) 42%,
    rgba(245, 158, 11, 0.06) 70%,
    transparent 100%
  );
  filter: blur(18px);
}

.monument-mark:hover::before {
  opacity: 1;
}

.monument-title {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: clamp(18px, 2.4vw, 32px);
  line-height: 0.92;
  transform-origin: center center;
  scale: calc(1 - var(--scroll-progress) * 0.44);
  will-change: scale;
}

.monument-yp {
  font-family: var(--font-sans);
  font-size: clamp(96px, 15.5vw, 216px);
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--text-bone);
  position: relative;
  display: inline-block;
  /* Pure #FAFAFA fill with subtle cursor-reactive optical rim refraction */
  text-shadow:
    calc((var(--mx-norm) - 0.5) * -10px) calc((var(--my-norm) - 0.5) * -6px) 28px rgba(56, 189, 248, calc(var(--m-energy) * 0.34)),
    calc((var(--mx-norm) - 0.5) * 10px) calc((var(--my-norm) - 0.5) * 6px) 32px rgba(167, 139, 250, calc(var(--m-energy) * 0.3));
  transition: text-shadow 280ms var(--ease-out-quart);
}

.monument-mark:hover .monument-yp {
  text-shadow:
    -6px -2px 26px rgba(56, 189, 248, 0.42),
    6px 4px 30px rgba(167, 139, 250, 0.38),
    0 0 44px rgba(245, 158, 11, 0.22);
}

.monument-year {
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.6vw, 48px);
  font-weight: 400;
  letter-spacing: -0.04em;
  color: var(--text-ash);
  font-variant-numeric: tabular-nums;
  padding: 6px 16px;
  border: 1px solid var(--border-zinc);
  border-radius: 12px;
  background: rgba(20, 20, 22, 0.82);
  translate: 0 clamp(-12px, -1.8vw, -24px);
  box-shadow: 0 0 24px -8px rgba(56, 189, 248, calc(var(--m-energy) * 0.28));
  transition:
    color 260ms var(--ease-out-quart),
    border-color 260ms var(--ease-out-quart),
    box-shadow 260ms var(--ease-out-quart);
}

body[data-color-active="true"] .monument-year {
  border-color: rgba(56, 189, 248, 0.42);
  color: var(--text-bone);
}

.monument-mark:hover .monument-year {
  color: var(--text-bone);
  border-color: rgba(245, 158, 11, 0.65);
  box-shadow: 0 0 28px -6px rgba(245, 158, 11, 0.38);
}

.monument-meta {
  margin-top: calc(16px - var(--scroll-progress) * 28px);
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.meta-sep {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--border-bright);
  transition: background-color 260ms var(--ease-out-quart);
}

body[data-color-active="true"] .meta-sep,
.monument-mark:hover .meta-sep {
  background: var(--hue-cyan);
}

/* ==========================================================================
   4. PINNED SIDE RAILS (Stay fixed on left and right edges)
   ========================================================================== */

.hud-rail {
  position: fixed;
  top: 48%;
  translate: 0 -50%;
  z-index: 30;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.hud-rail--left {
  left: clamp(28px, 5vw, 68px);
}

.hud-rail--right {
  right: clamp(28px, 5vw, 68px);
}

.hud-rail__vertical {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: 0.12em;
  color: var(--text-muted);
}

.hud-rail__track {
  width: 1px;
  height: 84px;
  background: var(--border-zinc);
  position: relative;
  overflow: hidden;
}

.hud-rail__fill {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, var(--text-bone), var(--hue-cyan));
  transform-origin: top center;
  scale: 1 var(--scroll-progress);
}

/* ==========================================================================
   5. PINNED BOTTOM HUD & MINIMAL SIGNAL LOCK (Always above ascending stream)
   ========================================================================== */

.hud-bottom {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 30;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  padding: 24px clamp(28px, 5vw, 68px) clamp(22px, 3vw, 34px);
  gap: 24px;
  background: linear-gradient(
    0deg,
    rgba(10, 10, 10, 0.95) 28%,
    rgba(10, 10, 10, 0.55) 68%,
    transparent 100%
  );
  pointer-events: none;
}

.hud-bottom__left {
  pointer-events: auto;
  display: inline-flex;
  align-items: center;
  gap: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.scroll-cue {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: opacity 260ms var(--ease-out-quart);
}

.scroll-cue::before {
  content: '';
  width: 16px;
  height: 1px;
  background: var(--text-ash);
}

.edition-link {
  color: var(--text-ash);
  text-decoration: none;
  padding: 6px 12px;
  border: 1px solid var(--border-zinc);
  border-radius: 8px;
  background: rgba(20, 20, 22, 0.88);
  transition:
    color 180ms var(--ease-out-quart),
    border-color 180ms var(--ease-out-quart),
    scale 160ms var(--ease-out-quart);
}

.edition-link:hover {
  color: var(--text-bone);
  border-color: var(--hue-amber);
}

.edition-link:focus-visible {
  outline: 2px solid var(--hue-cyan);
  outline-offset: 3px;
}

.edition-link:active {
  scale: 0.97;
}

.signal-form {
  pointer-events: auto;
  display: inline-flex;
  align-items: center;
  background: rgba(20, 20, 22, 0.92);
  border: 1px solid var(--border-zinc);
  border-radius: 8px;
  padding: 4px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: border-color 240ms var(--ease-out-quart), box-shadow 240ms var(--ease-out-quart);
}

.signal-form:focus-within,
.signal-form:hover {
  border-color: var(--hue-violet);
  box-shadow: 0 0 28px -6px var(--hue-violet-soft);
}

.signal-form.is-locked {
  border-color: var(--hue-emerald);
}

.signal-input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-bone);
  caret-color: var(--hue-cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 8px 12px;
  width: 196px;
}

.signal-input:focus-visible {
  outline: none;
}

.signal-input::placeholder {
  color: var(--text-muted);
}

.signal-btn {
  background: var(--text-bone);
  color: var(--bg-obsidian);
  border: none;
  border-radius: 8px;
  padding: 8px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  cursor: pointer;
  touch-action: manipulation;
  transition:
    background-color 180ms var(--ease-out-quart),
    color 180ms var(--ease-out-quart),
    scale 150ms var(--ease-out-quart);
}

.signal-btn:hover {
  background: var(--hue-cyan);
  color: var(--bg-obsidian);
}

.signal-btn:focus-visible {
  outline: 2px solid var(--hue-cyan);
  outline-offset: 2px;
}

.signal-btn:active {
  scale: 0.97;
}

.signal-form.is-locked .signal-btn {
  background: var(--hue-emerald);
  color: var(--bg-obsidian);
}

/* ==========================================================================
   6. SHORT SCROLL STREAM & ASCENDING OBJECTS (Only these glide upward)
   ========================================================================== */

.scroll-stream {
  position: relative;
  z-index: 15;
  width: 100%;
  /* Short, effortless scroll: 147vh total (only 47vh of scroll travel!) */
  min-height: 147vh;
  pointer-events: none;
}

/* Negative Space Horizon ??83vh of standby void so top edge of 01 peeks cleanly at horizon */
.stream-void {
  height: 83vh;
  width: 100%;
}

/* Ascending Field ??Glides across the locked viewport as user scrolls */
.ascending-field {
  min-height: 64vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 0 clamp(28px, 10vw, 160px) 14vh;
}

.vessel-grid {
  width: 100%;
  max-width: 960px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(20px, 2.2vw, 28px);
  align-items: start;
}

/* Individual Ascending Monolith Card */
.vessel-card {
  pointer-events: auto;
  position: relative;
  background: rgba(20, 20, 22, 0.88);
  border: 1px solid var(--border-zinc);
  border-radius: 12px;
  padding: 28px;
  height: 296px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  cursor: pointer;
  touch-action: manipulation;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  --card-x: 50%;
  --card-y: 50%;
  --accent-color: var(--hue-cyan);
  --accent-soft: var(--hue-cyan-soft);
  translate: 0 0;
  scale: 1;
  transition:
    border-color 280ms var(--ease-out-quart),
    scale 180ms var(--ease-out-quart),
    box-shadow 280ms var(--ease-out-quart),
    background-color 280ms var(--ease-out-quart);
  will-change: translate, scale;
}

/* Staggered Vertical Offsets using independent CSS translate property */
.vessel-card--offset-mid {
  --accent-color: var(--hue-amber);
  --accent-soft: var(--hue-amber-soft);
  translate: 0 calc((1 - var(--scroll-progress)) * 42px + 10px);
}

.vessel-card--offset-high {
  --accent-color: var(--hue-violet);
  --accent-soft: var(--hue-violet-soft);
  translate: 0 calc((1 - var(--scroll-progress)) * 84px + 20px);
}

/* Local Cursor-Tracking Chromatic Glow inside each Vessel */
.vessel-card__glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity 320ms var(--ease-out-quart);
  background: radial-gradient(
    260px circle at var(--card-x) var(--card-y),
    var(--accent-soft) 0%,
    transparent 75%
  );
}

.vessel-card:hover,
.vessel-card:focus-visible,
.vessel-card.is-armed {
  border-color: var(--accent-color);
  box-shadow: 0 20px 48px -20px var(--accent-soft);
  outline: none;
}

.vessel-card:hover .vessel-card__glow,
.vessel-card:focus-visible .vessel-card__glow,
.vessel-card.is-armed .vessel-card__glow {
  opacity: 1;
}

.vessel-card:active {
  scale: 0.98;
}

.vessel-card__top,
.vessel-card__bottom {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.vessel-index {
  font-family: var(--font-sans);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--text-bone);
  font-variant-numeric: tabular-nums;
}

.vessel-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border-bright);
  transition:
    background-color 240ms var(--ease-out-quart),
    box-shadow 240ms var(--ease-out-quart),
    scale 240ms var(--ease-out-quart);
}

.vessel-card:hover .vessel-indicator,
.vessel-card.is-armed .vessel-indicator {
  background: var(--accent-color);
  box-shadow: 0 0 12px var(--accent-color);
  scale: 1.15;
}

.vessel-card__center {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
}

.vessel-glyph {
  width: 64px;
  height: 64px;
  fill: none;
  stroke: var(--border-bright);
  stroke-width: 1.5;
  transition:
    stroke 300ms var(--ease-out-quart),
    scale 380ms var(--ease-out-quart),
    filter 300ms var(--ease-out-quart);
}

.vessel-card:hover .vessel-glyph,
.vessel-card.is-armed .vessel-glyph {
  stroke: var(--accent-color);
  scale: 1.08;
  filter: drop-shadow(0 0 14px var(--accent-soft));
}

.vessel-state {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-ash);
  transition: color 240ms var(--ease-out-quart);
}

.vessel-card:hover .vessel-state,
.vessel-card.is-armed .vessel-state {
  color: var(--accent-color);
}

.vessel-coord {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

/* ==========================================================================
   7. RESPONSIVE & REDUCED MOTION
   ========================================================================== */

@media (max-width: 900px) {
  .hud-rail,
  .hud-center-tag,
  .frame-corner {
    display: none;
  }

  .monument-lock {
    height: 74vh;
  }

  .stream-void {
    /* Places only the top header of Vessel 01 above the mobile bottom HUD at scroll 0 */
    height: 75vh;
  }

  .ascending-field {
    padding: 0 24px 24vh;
  }

  .vessel-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    gap: 16px;
  }

  .vessel-card {
    height: 216px;
    padding: 22px;
  }

  .vessel-card--offset-mid,
  .vessel-card--offset-high {
    translate: 0 0;
  }

  .hud-bottom {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    padding: 28px 24px 18px;
    background: linear-gradient(
      0deg,
      #0A0A0A 62%,
      rgba(10, 10, 10, 0.88) 85%,
      transparent 100%
    );
  }

  .hud-bottom__left {
    justify-content: space-between;
  }

  .signal-form {
    width: 100%;
    justify-content: space-between;
  }

  .signal-input {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .monument-lock,
  .monument-title,
  .vessel-card--offset-mid,
  .vessel-card--offset-high {
    translate: none !important;
    scale: none !important;
  }
}