/*
 * HAVE: ${a}/ai/assets/site.css
 *
 * javadoc.rapidcow.org -- shared styles.
 * Plain CSS with native nesting (Baseline 2023).
 * Dark only, because Light burns my eyes.
 *
 * Designed by Claude Code ☕
 */

:root {
  color-scheme: dark;

  --bg: #0a0c11;
  --surface: #10131a;
  --raised: #161a23;
  --line: #242a37;
  --line-hi: #343c4f;
  --text: #dde1ec;
  --dim: #8b94a8;
  --faint: #566074;

  --amber: #ffb454;       /* coffee, obviously */
  --amber-deep: #c9791a;
  --teal: #5fd4c4;
  --ink-on-amber: #1b1203;

  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font: 1rem/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;

  /* a warm glow up top, and a dot grid that fades out downwards */
  &::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background:
      radial-gradient(60rem 28rem at 15% -8%, color-mix(in srgb, var(--amber) 14%, transparent), transparent 70%),
      radial-gradient(48rem 24rem at 100% 0%, color-mix(in srgb, var(--teal) 9%, transparent), transparent 70%),
      radial-gradient(circle at 1px 1px, var(--line) 1px, transparent 1.5px) 0 0 / 24px 24px;
    mask-image: linear-gradient(to bottom, #000 25%, transparent 85%);
  }
}

::selection { background: color-mix(in srgb, var(--amber) 35%, transparent); }

a {
  color: var(--amber);
  text-underline-offset: 0.2em;
  text-decoration-thickness: 1px;

  &:hover { color: #ffd08f; }
  &:focus-visible {
    outline: 2px solid var(--teal);
    outline-offset: 3px;
    border-radius: 3px;
  }
}

code, kbd, samp { font-family: var(--mono); font-size: 0.88em; }

:not(pre) > code {
  padding: 0.12em 0.4em;
  background: var(--raised);
  border: 1px solid var(--line);
  border-radius: 4px;
}

.page {
  max-width: 46rem;
  margin: 0 auto;
  padding: 0 1.25rem 4rem;
}

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

.masthead {
  padding: 3.5rem 0 1rem;

  /* org.rapidcow / trivnote / libexpr */
  .crumbs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.15rem 0.5rem;
    margin: 0 0 1.75rem;
    font: 0.85rem/1.4 var(--mono);
    color: var(--faint);

    a { color: var(--dim); text-decoration: none; &:hover { color: var(--amber); } }
    [aria-current] { color: var(--text); }
    i { font-style: normal; color: var(--line-hi); }
  }

  h1 {
    margin: 0;
    font: 700 clamp(2.4rem, 9vw, 4rem)/1.02 var(--mono);
    letter-spacing: -0.04em;

    /* terminal caret */
    &::after {
      content: "";
      display: inline-block;
      width: 0.5ch;
      height: 0.82em;
      margin-left: 0.18em;
      vertical-align: -0.06em;
      background: var(--amber);
      border-radius: 1px;
      animation: blink 1.1s steps(1) infinite;
    }

    .pkg {
      display: block;
      margin-bottom: 0.6rem;
      font: 400 0.9rem/1 var(--mono);
      letter-spacing: 0;
      color: var(--faint);
    }
  }

  .lede {
    max-width: 36rem;
    margin: 1.25rem 0 0;
    font-size: 1.1rem;
    color: var(--dim);
  }
}

@keyframes blink { 50% { opacity: 0; } }

/* ---- sections ---------------------------------------------------- */

section {
  margin-top: 3rem;

  > h2 {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    margin: 0 0 1.25rem;
    font: 600 0.78rem/1 var(--mono);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--dim);

    &::before { content: "//"; color: var(--amber); }
    &::after { content: ""; flex: 1; border-top: 1px solid var(--line); }
  }
}

/* ---- tiles (namespaces / modules) -------------------------------- */

.tiles {
  display: grid;
  gap: 0.9rem;
  margin: 0;
  padding: 0;
  list-style: none;
  grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr));
}

/* ---- the spotlight card: shared by tiles and releases ------------- */

.card {
  --mx: 50%;
  --my: 0%;
  position: relative;
  isolation: isolate;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  transition: border-color 0.2s, transform 0.2s;

  /* cursor-following highlight; --mx/--my are set by a few lines of JS */
  &::before {
    content: "";
    position: absolute;
    inset: -1px;
    z-index: -1;
    border-radius: inherit;
    opacity: 0;
    transition: opacity 0.25s;
    background: radial-gradient(22rem circle at var(--mx) var(--my),
      color-mix(in srgb, var(--amber) 16%, transparent), transparent 65%);
  }

  &:hover {
    border-color: var(--line-hi);
    &::before { opacity: 1; }
  }
}

.tile {
  display: block;
  padding: 1.2rem 1.3rem 1.3rem;
  color: inherit;
  text-decoration: none;

  .path { font: 0.78rem/1.3 var(--mono); color: var(--faint); }

  .name {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 0.35rem;
    font: 600 1.35rem/1.2 var(--mono);
    letter-spacing: -0.02em;
    color: var(--text);

    .go { color: var(--amber); transition: transform 0.2s; }
  }

  .desc { margin: 0.5rem 0 0; font-size: 0.93rem; line-height: 1.5; color: var(--dim); }

  &:hover .go { transform: translateX(4px); }
}

/* ---- release timeline (a tiny `git log --graph`) ----------------- */

.timeline {
  --rail: 1.1rem;
  position: relative;
  margin: 0;
  padding: 0 0 0 calc(var(--rail) + 1.4rem);
  list-style: none;
  display: grid;
  gap: 1.1rem;

  /* the rail */
  &::before {
    content: "";
    position: absolute;
    left: calc(var(--rail) / 2 - 1px);
    top: 1.4rem;
    bottom: -1.5rem;
    width: 2px;
    background: linear-gradient(to bottom, var(--amber), var(--line) 55%, transparent);
  }
}

.release {
  position: relative;
  padding: 1.3rem 1.4rem 1.2rem;

  /* the node on the rail */
  &::after {
    content: "";
    position: absolute;
    left: calc(-1 * (var(--rail) + 1.4rem) + 0.04rem);
    top: 1.55rem;
    width: calc(var(--rail) - 0.08rem);
    height: calc(var(--rail) - 0.08rem);
    border-radius: 50%;
    background: var(--bg);
    border: 2px solid var(--line-hi);
    transition: border-color 0.2s, box-shadow 0.2s;
  }

  &:hover::after { border-color: var(--amber); }

  &.latest {
    border-color: color-mix(in srgb, var(--amber) 35%, var(--line));

    &::after {
      background: var(--amber);
      border-color: var(--amber);
      box-shadow: 0 0 0 4px color-mix(in srgb, var(--amber) 20%, transparent),
                  0 0 18px var(--amber);
    }
  }

  .head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.4rem 0.8rem;
  }

  .ver {
    margin: 0;
    font: 700 1.9rem/1.1 var(--mono);
    letter-spacing: -0.04em;

    small { color: var(--faint); font-weight: 400; margin-right: 0.05em; }
  }

  .when { font: 0.82rem/1 var(--mono); color: var(--faint); }

  .note { margin: 0.6rem 0 0; color: var(--dim); font-size: 0.95rem; }
}

.pill {
  padding: 0.18rem 0.6rem;
  font: 700 0.68rem/1.4 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 99px;
  border: 1px solid var(--line-hi);
  color: var(--dim);

  &.latest { background: var(--amber); border-color: var(--amber); color: var(--ink-on-amber); }
  &.old { color: var(--faint); }
}

/* ---- build info: the "which commit is this, exactly?" strip ------- */

.build {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.35rem 1rem;
  margin: 1.1rem 0 0;
  padding: 0.85rem 1rem;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 7px;
  font: 0.82rem/1.5 var(--mono);

  dt { color: var(--faint); }
  dd { margin: 0; min-width: 0; color: var(--text); overflow-wrap: anywhere; }

  .hash {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
  }

  .full { color: var(--faint); }

  button {
    padding: 0.05rem 0.5rem;
    font: inherit;
    font-size: 0.75rem;
    color: var(--dim);
    background: transparent;
    border: 1px solid var(--line-hi);
    border-radius: 4px;
    cursor: pointer;

    &:hover { color: var(--amber); border-color: var(--amber); }
    &:focus-visible { outline: 2px solid var(--teal); outline-offset: 2px; }
    &[data-done] { color: var(--teal); border-color: var(--teal); }
  }
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.95rem;
  font: 600 0.88rem/1.2 var(--mono);
  text-decoration: none;
  color: var(--text);
  background: var(--raised);
  border: 1px solid var(--line-hi);
  border-radius: 7px;
  transition: background 0.15s, color 0.15s, border-color 0.15s;

  &:hover { color: var(--amber); border-color: var(--amber); }

  &.primary {
    background: var(--amber);
    border-color: var(--amber);
    color: var(--ink-on-amber);
    &:hover { background: #ffc980; border-color: #ffc980; color: var(--ink-on-amber); }
  }
}

/* ---- footer ------------------------------------------------------ */

footer {
  margin-top: 4.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font: 0.8rem/1.7 var(--mono);
  color: var(--faint);

  a { color: var(--dim); &:hover { color: var(--amber); } }
}

/* ---- entrance + small screens ------------------------------------ */

@media (prefers-reduced-motion: no-preference) {
  .masthead, section, .timeline > li, .tiles > li {
    animation: rise 0.55s cubic-bezier(.2, .7, .2, 1) backwards;
  }
  section { animation-delay: 0.1s; }
  .timeline > li:nth-child(1), .tiles > li:nth-child(1) { animation-delay: 0.15s; }
  .timeline > li:nth-child(2), .tiles > li:nth-child(2) { animation-delay: 0.25s; }
  .timeline > li:nth-child(3), .tiles > li:nth-child(3) { animation-delay: 0.35s; }
}

@keyframes rise { from { opacity: 0; transform: translateY(10px); } }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

@media (max-width: 34rem) {
  .timeline { --rail: 0.9rem; padding-left: calc(var(--rail) + 0.9rem); }
  .release {
    padding: 1.1rem 1rem;
    &::after { left: calc(-1 * (var(--rail) + 0.9rem) + 0.04rem); }
  }
  .build { grid-template-columns: 1fr; gap: 0; dt { margin-top: 0.5rem; } }
}