/* board-друг
   Carbon paper on graphite. Print red for anything consequential, phosphor
   amber for identity. Every post carries a fuse line that shortens as its day
   burns down; that line is the only ornament on the page. */

:root {
  --ink: #0d0c0b;
  --ink-2: #16140f;
  --paper: #e8e2d4;
  --ash: #837d6e;
  --ash-dim: #4a463d;
  --cinnabar: #d6321f;
  --phosphor: #e8b23a;

  --mono: "IBM Plex Mono", "JetBrains Mono", "DejaVu Sans Mono", "Liberation Mono", ui-monospace,
    monospace;
  --condensed: "Arial Narrow", "Liberation Sans Narrow", "Roboto Condensed", "Oswald", "Haettenschweiler",
    var(--mono);

  --gut: clamp(1rem, 4vw, 3rem);
  --hair: 1px solid var(--ash-dim);
}

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

html {
  background: var(--ink);
}

body {
  margin: 0;
  min-height: 100dvh;
  padding: 0 var(--gut) 6rem;
  background: var(--ink);
  color: var(--paper);
  font: 400 clamp(13px, 0.86rem, 15px) / 1.5 var(--mono);
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Paper tooth. Static, so it reads as stock rather than as an effect. */
.grain {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.5;
  background-image: repeating-linear-gradient(
      0deg,
      rgba(232, 226, 212, 0.022) 0 1px,
      transparent 1px 3px
    ),
    radial-gradient(120% 80% at 50% 0%, rgba(232, 178, 58, 0.05), transparent 60%);
}

.mast,
.sheet {
  position: relative;
  z-index: 1;
  max-width: 62rem;
  margin: 0 auto;
}

/* --- masthead ---------------------------------------------------------- */

.mast {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  padding: clamp(1.5rem, 5vw, 3.25rem) 0 0.5rem;
  border-bottom: 3px solid var(--cinnabar);
}

.mast__word {
  margin: 0;
  font-family: var(--condensed);
  font-size: clamp(3.4rem, 15vw, 8.5rem);
  font-weight: 700;
  font-stretch: condensed;
  line-height: 0.82;
  letter-spacing: -0.035em;
  text-transform: uppercase;
  color: var(--paper);
  /* Narrow faces are not reliably installed, so the condensing is done here. */
  transform: scaleX(0.84);
  transform-origin: left bottom;
}

.mast__side {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.35rem;
  padding-bottom: 0.4rem;
  text-align: right;
}

.mast__count {
  font-size: 0.78rem;
  color: var(--ash);
  font-variant-numeric: tabular-nums;
}

.mast__you {
  color: var(--phosphor);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: lowercase;
  white-space: nowrap;
}

/* --- compose ----------------------------------------------------------- */

.compose {
  margin: 1.75rem 0 0;
  border: var(--hair);
  background: linear-gradient(180deg, var(--ink-2), var(--ink));
}

.compose:focus-within {
  border-color: var(--ash);
}

.compose__text {
  display: block;
  width: 100%;
  min-height: 4.5rem;
  padding: 0.95rem 1rem 0.6rem;
  border: 0;
  background: none;
  resize: none;
  color: var(--paper);
  caret-color: var(--cinnabar);
  font: inherit;
  font-size: clamp(15px, 1.05rem, 19px);
  line-height: 1.45;
}

.compose__text:focus {
  outline: none;
}

.compose__rail {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.65rem 0.5rem 1rem;
  border-top: var(--hair);
}

.compose__hash {
  color: var(--ash-dim);
}

.compose__tag {
  flex: 1 1 auto;
  min-width: 4rem;
  border: 0;
  background: none;
  color: var(--ash);
  font: inherit;
  letter-spacing: 0.04em;
}

.compose__tag:focus {
  outline: none;
  color: var(--paper);
}

.compose__count {
  color: var(--ash-dim);
  font-variant-numeric: tabular-nums;
  font-size: 0.8rem;
}

.compose__count.is-tight {
  color: var(--phosphor);
}

.compose__count.is-over {
  color: var(--cinnabar);
}

.send {
  padding: 0.5rem 1.1rem;
  border: 0;
  background: var(--cinnabar);
  color: #fff;
  font: inherit;
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  cursor: pointer;
}

.send:hover:not(:disabled) {
  background: var(--paper);
  color: var(--ink);
}

.send:disabled {
  background: var(--ash-dim);
  color: var(--ink);
  cursor: default;
}

.send.is-working {
  background: var(--phosphor);
  color: var(--ink);
}

.refuse {
  margin: 0;
  max-height: 0;
  overflow: hidden;
  padding: 0 1rem;
  color: var(--cinnabar);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: max-height 140ms ease-out;
}

.refuse.is-on {
  max-height: 2.5rem;
  padding: 0.55rem 1rem;
  border-top: 1px solid rgba(214, 50, 31, 0.4);
}

.ts:not(:empty) {
  padding: 0.65rem 1rem;
  border-top: var(--hair);
}

/* --- tag rail ---------------------------------------------------------- */

.rail {
  display: flex;
  gap: 0.15rem;
  overflow-x: auto;
  margin: 1.5rem 0 0;
  padding-bottom: 0.5rem;
  border-bottom: var(--hair);
  scrollbar-width: none;
}

.rail::-webkit-scrollbar {
  display: none;
}

.rail__tag {
  flex: 0 0 auto;
  padding: 0.3rem 0.6rem;
  border: 0;
  border-left: 2px solid transparent;
  background: none;
  color: var(--ash);
  font: inherit;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  cursor: pointer;
  white-space: nowrap;
}

.rail__tag:hover {
  color: var(--paper);
}

.rail__tag.is-on {
  border-left-color: var(--cinnabar);
  color: var(--paper);
}

.rail__tag sup {
  margin-left: 0.3em;
  color: var(--ash-dim);
  font-size: 0.65em;
}

/* --- feed -------------------------------------------------------------- */

.feed {
  margin: 0;
  padding: 0;
  list-style: none;
}

.post {
  padding: 1rem 0 0.9rem;
}

.post.is-new {
  animation: strike 320ms ease-out;
}

.post__head {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.post__age {
  flex: 0 0 3.5rem;
  color: var(--ash-dim);
  font-variant-numeric: tabular-nums;
}

.post__code {
  color: var(--phosphor);
  text-transform: lowercase;
  letter-spacing: 0.05em;
}

.post__tag {
  margin-left: auto;
  color: var(--ash-dim);
  text-transform: lowercase;
}

.post__body {
  margin: 0.4rem 0 0.7rem;
  max-width: 44ch;
  font-size: clamp(15px, 1.05rem, 18px);
  line-height: 1.5;
  overflow-wrap: anywhere;
}

/* The signature: every post sits on a fuse that shortens over its 24 hours.
   It doubles as the rule between posts, so the board has one device, not two. */
.post__fuse {
  height: 2px;
  background: rgba(131, 125, 110, 0.1);
}

.post__fuse i {
  display: block;
  height: 2px;
  background: linear-gradient(90deg, var(--cinnabar) 0%, var(--phosphor) 85%, #fff 100%);
  transition: width 900ms linear;
}

.feed__empty {
  padding: 3rem 0;
  color: var(--ash-dim);
  font-size: 2rem;
  letter-spacing: 0.3em;
}

/* --- flip -------------------------------------------------------------- */

[data-flip],
[data-flip-live] {
  transition: text-shadow 90ms linear;
}

.is-striking {
  color: var(--phosphor);
  text-shadow: 0 0 10px rgba(232, 178, 58, 0.45);
}

@keyframes strike {
  from {
    opacity: 0;
    transform: translateX(-3px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* --- plumbing ---------------------------------------------------------- */

:focus-visible {
  outline: 2px solid var(--cinnabar);
  outline-offset: 2px;
}

::selection {
  background: var(--cinnabar);
  color: #fff;
}

@media (max-width: 34rem) {
  .mast {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.5rem;
  }

  .mast__side {
    align-items: flex-start;
    text-align: left;
  }

  .post__head {
    flex-wrap: wrap;
    gap: 0.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .grain {
    display: none;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}