/* timb.us — phosphor CRT theme */

/* === Theme tokens === */
:root {
  --bg:           #050a06;
  --bg-vignette:  #0c1a0e;
  --phos:         #39ff14;
  --phos-dim:     #1a8a1a;
  --phos-soft:    #cfe6cb;
  --phos-faint:   #143a16;
  --grid-major:   #143a16;
  --grid-minor:   #0f3014;

  --bloom-text:   0 0 6px rgba(57, 255, 20, 0.45);
  --bloom-strong: 0 0 12px rgba(57, 255, 20, 0.60);

  /* Glitch durations exposed as vars; main.js can override at runtime. */
  --flick-period:    4.3s;
  --tear-period:     25s;
  --roll-period:     30s;
  --jitter-period:   0.18s;
  --sweep-period:    7s;
  --boot-duration:   700ms;
}

/* === Fonts (self-hosted) === */
@font-face {
  font-family: 'Major Mono Display';
  src: url('/assets/fonts/MajorMonoDisplay-Regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Source Code Pro';
  src: url('/assets/fonts/SourceCodePro-Light.woff2') format('woff2');
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Source Code Pro';
  src: url('/assets/fonts/SourceCodePro-Regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

/* === Reset / base === */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { background: var(--bg); }

body {
  min-height: 100vh;
  /* Layered background:
     1) major graticule grid — vertical lines at fifths of viewport
     2) major graticule grid — horizontal lines at fifths of viewport
     3) center-axis minor ticks — short crosshairs at viewport center
     4) radial phosphor vignette toward the center
     5) base near-black phosphor bg
     All fixed so the graticule stays put as content scrolls. */
  background-color: var(--bg);
  background-image:
    linear-gradient(to right,  rgba(20, 58, 22, 0.45) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(20, 58, 22, 0.45) 1px, transparent 1px),
    radial-gradient(ellipse at center, var(--bg-vignette) 0%, var(--bg) 80%);
  background-size: 20vw 100%, 100% 20vh, 100% 100%;
  background-position: 0 0, 0 0, 0 0;
  background-repeat: repeat-x, repeat-y, no-repeat;
  background-attachment: fixed, fixed, fixed;
  color: var(--phos-soft);
  font-family: 'Source Code Pro', ui-monospace, monospace;
  font-weight: 300;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: hidden;
}

/* Center-axis minor ticks — short crosshairs at viewport center,
   spec'd at "minor ticks on the center axes". Drawn via fixed pseudo
   so they're cheap to position with translate(-50%) without affecting
   layout. */
body::before {
  content: "";
  position: fixed;
  left: 50%;
  top: 50%;
  width: 24px;
  height: 24px;
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: -1;
  background-image:
    linear-gradient(to right,  var(--grid-minor) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-minor) 1px, transparent 1px);
  background-size: 1px 100%, 100% 1px;
  background-position: center, center;
  background-repeat: no-repeat;
  opacity: 0.5;
}

/* All headings phosphor-bright by default. */
h1, h2, h3 {
  font-family: 'Major Mono Display', ui-monospace, monospace;
  font-weight: 400;
  color: var(--phos);
  text-shadow: var(--bloom-text);
  letter-spacing: 2px;
  margin: 0;
}

a {
  color: var(--phos);
  text-decoration: none;
  text-shadow: var(--bloom-text);
}

/* === Visually hidden utility (for sr-only announcer) === */
.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;
}

/* === Skip link === */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--bg);
  color: var(--phos);
  padding: 8px 12px;
  border: 1px solid var(--phos);
  z-index: 1000;
}
.skip-link:focus { left: 12px; top: 12px; }

/* === Persistent scanlines overlay === */
.scanlines {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0) 0px,
    rgba(0, 0, 0, 0) 2px,
    rgba(0, 0, 0, 0.18) 3px
  );
  mix-blend-mode: multiply;
  z-index: 100;
}

/* === Slow scan sweep === */
.sweep {
  position: fixed;
  left: 0;
  right: 0;
  height: 28%;
  top: -28%;
  pointer-events: none;
  background: linear-gradient(
    to bottom,
    transparent 0%,
    rgba(57, 255, 20, 0.04) 60%,
    rgba(57, 255, 20, 0.10) 100%
  );
  animation: sweep var(--sweep-period) linear infinite;
  z-index: 99;
}
@keyframes sweep {
  from { top: -28%; }
  to   { top: 100%; }
}

/* === Rolling bright bar (sync drift) === */
.roll-bar {
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  height: 6%;
  pointer-events: none;
  background: linear-gradient(
    to bottom,
    transparent,
    rgba(57, 255, 20, 0.18),
    transparent
  );
  mix-blend-mode: screen;
  z-index: 99;
  opacity: 0;
}
.roll-bar.rolling { animation: roll 1.4s linear; }
@keyframes roll {
  0%   { opacity: 0;    transform: translateY(0); }
  10%  { opacity: 0.45; transform: translateY(0); }
  90%  { opacity: 0.45; transform: translateY(60vh); }
  100% { opacity: 0;    transform: translateY(60vh); }
}

/* === Base flicker on the whole page ===
   Spec: ~3–4% opacity oscillation, irregular keyframes (no perfect sine).
   Mobile uses flick-mobile (amplitude halved) — see the mobile media query below. */
body { animation: flick var(--flick-period) infinite; }
@keyframes flick {
  0%, 100% { opacity: 1; }
  23%      { opacity: 0.96; }
  24%      { opacity: 0.99; }
  61%      { opacity: 0.97; }
  62%      { opacity: 1; }
}
@keyframes flick-mobile {
  0%, 100% { opacity: 1; }
  23%      { opacity: 0.98; }
  24%      { opacity: 0.995; }
  61%      { opacity: 0.985; }
  62%      { opacity: 1; }
}

/* === Page frame layout === */
.screen-top, .screen-bottom { padding: 14px 32px; }
.screen-main {
  padding: 24px 32px 64px;
  max-width: 1160px;
  margin: 0 auto;
  position: relative;
  min-height: calc(100vh - 200px);
  /* Spec channel cross-fade ~180ms, project detail fade ~120ms.
     main.js sets --screen-fade per navigation kind. */
  transition: opacity var(--screen-fade, 180ms) ease;
}
.screen-main:focus { outline: none; }
.screen-main.is-fading { opacity: 0; }

/* Detail-only fade — same channel, project selection change. ~120ms.
   main.js scopes the fade to the .detail element so the project list
   stays at full opacity (spec: only the detail should swap on this kind
   of nav, not the whole channel). */
.detail {
  transition: opacity var(--screen-fade, 120ms) ease;
}
.detail.is-fading { opacity: 0; }

/* === Top status line === */
.status-line.top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 11px;
  letter-spacing: 1.5px;
  color: var(--phos);
  text-shadow: var(--bloom-text);
  border-bottom: 0.5px solid rgba(57, 255, 20, 0.35);
  padding-bottom: 6px;
  margin-bottom: 14px;
}
.status-line .brand { font-family: 'Source Code Pro', monospace; }
.status-line .rec { opacity: 0.7; }
/* Breathing dot — reproduces the Apple PowerBook sleep-LED algorithm:
   asymmetric two-half Gaussian curve (narrower rise, wider fall), 5s cycle,
   ~1s pause at trough, I:E ratio ~1:1.67. Reference:
   https://avital.ca/notes/a-closer-look-at-apples-breathing-light
   Each keyframe is the Gaussian sample value linearly interpolated between
   --phos-faint (off) and --phos (peak), pre-resolved as sRGB hex so the
   curve is exact regardless of how the browser interpolates between stops.
   Linear timing so the discrete samples aren't further smoothed. */
.status-line .rec-dot {
  display: inline-block;
  animation: rec-breathe 5s linear infinite;
}

@keyframes rec-breathe {
  0%        { color: #143c16; }
  5%        { color: #154216; }
  10%       { color: #195616; }
  15%       { color: #207b15; }
  20%       { color: #2bb215; }
  25%       { color: #35e714; }
  30%       { color: #39ff14; }
  35%       { color: #38f714; }
  40%       { color: #33df14; }
  45%       { color: #2dc015; }
  50%       { color: #279d15; }
  55%       { color: #217d15; }
  60%       { color: #1c6316; }
  65%       { color: #185216; }
  70%       { color: #164616; }
  75%       { color: #154016; }
  80%       { color: #143c16; }
  85%, 100% { color: #143a16; }
}

/* Active state — JS toggles .is-active when there's recent pointer/keyboard
   activity (cleared after 5s idle). Faster, sine-like oscillation between
   full --phos and the midpoint (#279d15, 50% on the phos-faint↔phos line).
   Keyframes peak at 0%/100% so the animation starts (and ends) at full
   phos, matching the colour the wake-up fade lands on with no jump. */
.status-line .rec-dot.is-active {
  animation: rec-active 1.6s ease-in-out infinite;
}

@keyframes rec-active {
  0%, 100% { color: var(--phos); }
  50%      { color: #279d15; }
}

/* Wake-up and fall-asleep transitions. JS captures the current animated
   color, freezes it inline, then transitions toward the target (peak for
   waking, trough for falling). animation: none disables the running
   breathe/active animation while the transition runs. Wake-up is faster
   so the dot feels responsive to user input; fall-asleep is slower so the
   dot eases into the sleeping breathe pattern. */
.status-line .rec-dot.is-waking-up {
  animation: none;
  transition: color 500ms ease-out;
}
.status-line .rec-dot.is-falling-asleep {
  animation: none;
  transition: color 800ms ease-out;
}

/* === Channel-tab nav === */
.channels {
  display: flex;
  gap: 28px;
  flex-wrap: nowrap;
  overflow-x: auto;
  padding-bottom: 8px;
  position: relative;
  animation: tab-tear var(--tear-period) infinite;
}
.channels a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--phos);
  text-shadow: var(--bloom-text);
  opacity: 0.5;
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  white-space: nowrap;
  transition: opacity 180ms ease, border-bottom-color 180ms ease;
}
.channels a:hover,
.channels a:focus-visible { opacity: 0.8; }
.channels a[aria-current="page"] {
  opacity: 1;
  border-bottom-color: var(--phos);
}
/* Once main.js hydrates, swap the static per-tab border for the floating
   underline below — JS measures the active tab and slides the underline
   between tabs on channel change. */
body.is-hydrated .channels a[aria-current="page"] {
  border-bottom-color: transparent;
}
.channel-underline {
  position: absolute;
  bottom: 8px;
  left: 0;
  height: 1px;
  background: var(--phos);
  box-shadow: 0 0 6px rgba(57, 255, 20, 0.55);
  transform: translateX(var(--ul-x, 0));
  width: var(--ul-w, 0);
  opacity: var(--ul-opacity, 0);
  pointer-events: none;
  transition: transform 180ms ease, width 180ms ease;
}
.channels .ch-num {
  font-size: 11px;
  letter-spacing: 2px;
  opacity: 0.85;
}
/* Per-channel waveform glyphs (inline SVGs sized to 20x14 in markup) */
.channels .glyph {
  width: 22px;
  height: 14px;
  flex: 0 0 auto;
}

/* Horizontal-tear glitch on the channel-tab row */
@keyframes tab-tear {
  0%, 92%, 100% { transform: translate(0, 0); }
  93%   { transform: translate(-3px, 0); }
  93.5% { transform: translate(2px, 0); }
  94%   { transform: translate(0, 0); }
}

/* === Bottom status / footer fingerprint === */
.screen-bottom {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  letter-spacing: 1.5px;
  color: var(--phos);
  text-shadow: var(--bloom-text);
  opacity: 0.55;
  border-top: 0.5px solid rgba(57, 255, 20, 0.35);
  padding-top: 10px;
  margin-top: 32px;
}
.screen-bottom .fingerprint { white-space: nowrap; }

/* === One-shot boot sweep on first load === */
.boot-sweep {
  position: fixed;
  left: 0;
  right: 0;
  height: 20vh;
  top: -20vh;
  pointer-events: none;
  z-index: 200;
  background: linear-gradient(
    to bottom,
    transparent,
    rgba(57, 255, 20, 0.18) 80%,
    rgba(57, 255, 20, 0.45) 100%
  );
  animation: boot-sweep var(--boot-duration) ease-out forwards;
}
@keyframes boot-sweep {
  from { top: -20vh; }
  to   { top: 100vh; }
}

/* Page content stays hidden behind the sweep until it's mostly past. */
body.booting .screen-main { opacity: 0; }
body.booting.booted .screen-main {
  opacity: 1;
  transition: opacity 240ms ease-out;
}

/* === Per-character jitter (applied via .jit class on <span>s) === */
.jit { display: inline-block; animation: char-jitter var(--jitter-period) steps(2) infinite; }
@keyframes char-jitter {
  0%, 100% { transform: translate(0, 0); }
  50%      { transform: translate(0.6px, -0.4px); }
}

/* === Channel container shared === */
.channel { position: relative; }
.channel-title {
  font-size: clamp(40px, 7vw, 72px);
  letter-spacing: 6px;
  text-shadow: var(--bloom-strong);
  margin-bottom: 2px;
}
.channel-title .channel-prefix {
  display: block;
  font-family: 'Source Code Pro', monospace;
  font-size: clamp(10px, 1.3vw, 14px);
  font-weight: 400;
  letter-spacing: 4px;
  text-shadow: var(--bloom-text);
  opacity: 0.7;
  margin-bottom: 6px;
}
.channel-meta {
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--phos);
  text-shadow: var(--bloom-text);
  opacity: 0.65;
  margin-bottom: 16px;
}
hr.channel-rule {
  border: 0;
  border-top: 0.5px solid rgba(57, 255, 20, 0.5);
  margin: 0 0 24px 0;
}

/* === About === */
.about-bio {
  font-size: 15px;
  line-height: 1.7;
  color: var(--phos-soft);
  max-width: 64ch;
  margin: 0 0 28px 0;
}
.fact-stack {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-family: 'Source Code Pro', monospace;
  font-size: 12px;
  letter-spacing: 1.5px;
}
.fact-row { color: var(--phos-soft); }
.fact-label {
  color: var(--phos);
  text-shadow: var(--bloom-text);
  margin-right: 8px;
}

/* === Project channel split layout === */
.split {
  display: grid;
  grid-template-columns: minmax(280px, 40%) 1fr;
  gap: 32px;
  position: relative;
}
.split::before {
  /* vertical phosphor divider */
  content: "";
  position: absolute;
  left: 40%;
  top: 8px;
  bottom: 8px;
  width: 0;
  border-left: 0.4px solid rgba(57, 255, 20, 0.45);
  pointer-events: none;
}

/* === Project list === */
.project-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.project-row {
  display: grid;
  grid-template-columns: 28px 1fr auto;
  gap: 12px;
  align-items: start;
  padding: 12px 8px 14px 8px;
  position: relative;
  border-bottom: 0.4px solid rgba(57, 255, 20, 0.18);
  text-decoration: none;
  color: var(--phos-soft);
}
.project-row:hover { filter: brightness(1.15); }
.project-row:focus-visible {
  outline: 2px solid var(--phos);
  outline-offset: -2px;
  filter: brightness(1.15);
}
.project-row[aria-current="page"] {
  background: linear-gradient(to right, rgba(57, 255, 20, 0.06), transparent);
}
.project-row[aria-current="page"]::before {
  /* cursor triangle */
  content: "";
  position: absolute;
  left: -10px;
  top: 18px;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 4px 0 4px 8px;
  border-color: transparent transparent transparent var(--phos);
  filter: drop-shadow(0 0 4px rgba(57, 255, 20, 0.6));
}

.project-row .status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-top: 6px;
  background: var(--phos);
  box-shadow: 0 0 6px rgba(57, 255, 20, 0.7);
}
.project-row[data-status="archived"] {
  opacity: 0.6;
}
.project-row[data-status="archived"] .status-dot {
  background: transparent;
  border: 1px solid var(--phos);
  box-shadow: none;
}

.project-row .name {
  font-family: 'Source Code Pro', monospace;
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 1.5px;
  color: var(--phos);
  text-shadow: var(--bloom-text);
}
.project-row .summary {
  display: block;
  font-size: 11.5px;
  letter-spacing: 0.3px;
  color: var(--phos-soft);
  opacity: 0.75;
  margin-top: 4px;
  line-height: 1.4;
}
.project-row .status-text {
  font-size: 10px;
  letter-spacing: 1.5px;
  color: var(--phos);
  text-shadow: var(--bloom-text);
  opacity: 0.75;
  align-self: start;
  margin-top: 4px;
}

/* === Detail pane === */
.detail {
  padding-left: 16px;
  min-height: 280px;
  position: relative;
  /* aria-live region — content swaps when selection changes */
}
.detail-name {
  font-size: clamp(28px, 3.5vw, 42px);
  letter-spacing: 4px;
  margin: 0 0 12px 0;
}
.tag-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 16px 0;
}
.tag-chip {
  font-size: 10px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 4px 10px;
  border: 0.6px solid var(--phos);
  border-radius: 2px;
  color: var(--phos);
  text-shadow: var(--bloom-text);
  opacity: 0.8;
  background: transparent;
}
.detail-rule {
  border: 0;
  border-top: 0.4px solid rgba(57, 255, 20, 0.4);
  margin: 0 0 16px 0;
}
.detail-body {
  font-size: 13px;
  line-height: 1.7;
  color: var(--phos-soft);
  margin: 0 0 24px 0;
  max-width: 64ch;
}
.detail-body p { margin: 0 0 10px 0; }
.detail-body p:last-child { margin-bottom: 0; }

/* === Phosphor link button ===
   Spec: 1px #39ff14 border, 8px radius, Source Code Pro Regular ~13px
   tracked +1.5px, padding 10px 18px, transparent bg. Hover brightens
   the *border* opacity from ~70% → 100% (text stays bright) and adds an
   inner phosphor glow. Active inverts to filled phosphor / near-black. */
.btn-phosphor {
  display: inline-block;
  font-family: 'Source Code Pro', monospace;
  font-weight: 400;
  font-size: 13px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--phos);
  background: transparent;
  border: 1px solid rgba(57, 255, 20, 0.7);
  border-radius: 8px;
  padding: 10px 18px;
  text-shadow: var(--bloom-text);
  text-decoration: none;
  transition: border-color 120ms ease, background 120ms ease, color 120ms ease, box-shadow 120ms ease;
}
.btn-phosphor:hover {
  border-color: var(--phos);
  box-shadow: inset 0 0 12px rgba(57, 255, 20, 0.18);
}
.btn-phosphor:focus-visible {
  outline: 2px solid var(--phos);
  outline-offset: 3px;
  border-color: var(--phos);
}
.btn-phosphor:active {
  background: var(--phos);
  color: var(--bg);
  border-color: var(--phos);
  text-shadow: none;
}

/* === Empty channel state === */
.channel-empty .no-trace {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 360px;
  gap: 14px;
}
.no-trace-glyph {
  width: clamp(140px, 28vw, 220px);
  color: var(--phos);
  opacity: 0.75;
}
.no-trace-line {
  font-family: 'Major Mono Display', monospace;
  font-size: 16px;
  letter-spacing: 4px;
  color: var(--phos);
  text-shadow: var(--bloom-text);
}
.no-trace-sub {
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--phos);
  text-shadow: var(--bloom-text);
  opacity: 0.6;
}

/* === Contact channel === */
.contact-stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 720px;
}
.contact-row {
  display: grid;
  grid-template-columns: 56px 1fr 24px;
  gap: 16px;
  align-items: center;
  padding: 18px 20px;
  border: 1px solid rgba(57, 255, 20, 0.35);
  border-radius: 6px;
  text-decoration: none;
  color: var(--phos-soft);
  background: transparent;
  transition: background 120ms ease, border-color 120ms ease;
}
.contact-row:hover,
.contact-row:focus-visible {
  background: rgba(57, 255, 20, 0.06);
  border-color: var(--phos);
  outline: none;
}
.contact-glyph {
  width: 36px;
  height: 36px;
  color: var(--phos);
  filter: drop-shadow(0 0 6px rgba(57, 255, 20, 0.4));
}
.contact-text .service {
  font-family: 'Major Mono Display', monospace;
  font-size: 14px;
  letter-spacing: 3px;
  color: var(--phos);
  text-shadow: var(--bloom-text);
  display: block;
}
.contact-text .handle {
  font-family: 'Source Code Pro', monospace;
  font-size: 13px;
  color: var(--phos-soft);
  opacity: 0.75;
}
.contact-arrow {
  color: var(--phos);
  text-shadow: var(--bloom-text);
  font-size: 18px;
  text-align: right;
}

/* === Lissajous corner widget === */
.lissa {
  position: fixed;
  top: 12vh;
  right: 32px;
  width: clamp(60px, 12vmin, 120px);
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  pointer-events: none;
  z-index: 50;
}
.lissa #lissa-canvas {
  width: 100%;
  height: 100%;
  display: block;
}
.lissa-label {
  font-family: 'Source Code Pro', monospace;
  font-size: 9px;
  letter-spacing: 1.5px;
  color: var(--phos);
  text-shadow: var(--bloom-text);
  opacity: 0.55;
  margin-top: 4px;
  white-space: nowrap;
}

/* === Mobile === */
@media (max-width: 720px) {
  .screen-top, .screen-bottom { padding: 12px 16px; }
  .screen-main { padding: 16px; }
  .channels {
    gap: 18px;
    padding: 8px 16px;
    margin: 0 -16px;
    -webkit-overflow-scrolling: touch;
    /* Spec: edge fade sits below the active-tab underline so the underline
       remains full-opacity even when the active tab is near the strip's
       edge. Implemented with sticky pseudo-element overlays (below) rather
       than mask-image, which would dim the underline along with the tabs. */
  }
  .channels::before,
  .channels::after {
    content: '';
    position: sticky;
    flex-shrink: 0;
    width: 24px;
    align-self: stretch;
    pointer-events: none;
    z-index: 1;
  }
  .channels::before {
    left: 0;
    margin-right: -24px;
    background: linear-gradient(to right, var(--bg), rgba(5, 10, 6, 0));
  }
  .channels::after {
    right: 0;
    margin-left: -24px;
    background: linear-gradient(to left, var(--bg), rgba(5, 10, 6, 0));
  }
  .channel-underline {
    z-index: 2;
  }
  .split {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .split::before {
    /* horizontal divider in the stacked layout */
    left: 0;
    right: 0;
    top: auto;
    bottom: auto;
    height: 0;
    width: auto;
    border-left: none;
    border-top: 0.4px solid rgba(57, 255, 20, 0.45);
    /* place between list and detail; CSS-grid stacking is fine */
  }
  .channel-title { letter-spacing: 4px; }
  .lissa { top: 8vh; right: 12px; }
  .screen-bottom { font-size: 9px; gap: 8px; flex-wrap: wrap; }
  .screen-bottom .fingerprint {
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
    white-space: nowrap;
  }

  :root {
    --boot-duration: 500ms;
    --tear-period:   50s;   /* halved frequency on mobile */
    --roll-period:   60s;
  }

  /* Spec: halve the flicker amplitude on mobile. */
  body { animation-name: flick-mobile; }
}

/* === Reduced motion === */
@media (prefers-reduced-motion: reduce) {
  body { animation: none; }
  .sweep,
  .roll-bar,
  .channels { animation: none !important; }
  .boot-sweep { display: none; }
  body.booting .screen-main { opacity: 1; }
  .jit { animation: none; }
  .screen-main,
  .detail { transition: none !important; }
  .screen-main.is-fading,
  .detail.is-fading { opacity: 1 !important; }
  .channels a { transition: none !important; }
  .channel-underline { transition: none !important; }
  .rec-dot { animation: none !important; color: var(--phos); }
}