/* ============================================================
   Reeyarn Li — tech-feel theme
   ============================================================ */

/* ---------- Dark scheme tokens ---------- */
[data-md-color-scheme="slate"] {
  --md-hue: 222;
  --md-default-bg-color: hsl(222, 22%, 8%);
  --md-default-bg-color--light: hsl(222, 22%, 11%);
  --md-default-fg-color: hsl(220, 18%, 92%);
  --md-default-fg-color--light: hsl(220, 14%, 75%);
  --md-default-fg-color--lighter: hsl(220, 12%, 55%);
  --md-typeset-a-color: #22d3ee;            /* cyan-400 */
  --md-accent-fg-color: #67e8f9;            /* cyan-300 */
  --md-code-bg-color: hsl(222, 24%, 12%);
  --md-code-fg-color: #e2e8f0;

  --rl-grid: rgba(120, 200, 255, 0.06);
  --rl-line: rgba(120, 200, 255, 0.12);
  --rl-glow: 0 0 24px rgba(34, 211, 238, 0.25);
  --rl-card-bg: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0));
  --rl-card-border: rgba(148, 163, 184, 0.18);
}

/* ---------- Light scheme tokens ---------- */
[data-md-color-scheme="default"] {
  --md-typeset-a-color: #0e7490;
  --md-accent-fg-color: #0891b2;
  --rl-grid: rgba(15, 23, 42, 0.045);
  --rl-line: rgba(15, 23, 42, 0.1);
  --rl-glow: 0 0 0 transparent;
  --rl-card-bg: linear-gradient(180deg, rgba(15,23,42,0.015), rgba(15,23,42,0));
  --rl-card-border: rgba(15, 23, 42, 0.1);
}

/* ---------- Background grid ---------- */
.md-main {
  background-image:
    linear-gradient(var(--rl-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--rl-grid) 1px, transparent 1px);
  background-size: 32px 32px;
  background-position: -1px -1px;
}

/* ---------- Header ---------- */
.md-header {
  backdrop-filter: blur(10px);
  background: color-mix(in oklab, var(--md-default-bg-color) 75%, transparent);
  border-bottom: 1px solid var(--rl-line);
  box-shadow: none;
}
[data-md-color-scheme="default"] .md-header {
  background: color-mix(in oklab, white 80%, transparent);
}
.md-header__title { font-weight: 600; letter-spacing: 0.2px; }
.md-tabs {
  background: transparent;
  border-bottom: 1px solid var(--rl-line);
}
.md-tabs__link {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.74rem;
  text-transform: lowercase;
  letter-spacing: 0.5px;
  opacity: 0.75;
}
.md-tabs__link--active, .md-tabs__link:hover { opacity: 1; }

/* ---------- Typography ---------- */
.md-typeset h1, .md-typeset h2, .md-typeset h3 {
  letter-spacing: -0.01em;
  font-weight: 700;
}
.md-typeset h2 {
  border-top: 1px solid var(--rl-line);
  padding-top: 1.2rem;
  margin-top: 2.2rem;
}
.md-typeset a {
  text-decoration: none;
  border-bottom: 1px dashed transparent;
  transition: color .15s, border-color .15s;
}
.md-typeset a:hover {
  border-bottom-color: var(--md-accent-fg-color);
}
.md-typeset code {
  background: var(--md-code-bg-color);
  border: 1px solid var(--rl-line);
  padding: 0.08em 0.36em;
  border-radius: 4px;
  font-size: 0.86em;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 3.2rem 0 2.4rem;
  border-bottom: 1px solid var(--rl-line);
  margin-bottom: 2.2rem;
}
.hero::after {
  content: "";
  position: absolute;
  inset: -40% -20% auto auto;
  width: 520px; height: 520px;
  background: radial-gradient(closest-side, rgba(34, 211, 238, 0.18), transparent 70%);
  pointer-events: none;
  z-index: 0;
}
[data-md-color-scheme="default"] .hero::after {
  background: radial-gradient(closest-side, rgba(99, 102, 241, 0.12), transparent 70%);
}
.hero > * { position: relative; z-index: 1; }

/* Photos in posts */
.md-typeset img.rudi-photo {
  border-radius: 8px;
  border: 1px solid var(--rl-card-border);
  box-shadow: 0 6px 24px rgba(0,0,0,0.25);
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  line-height: 1.05;
  margin: 0.2rem 0 0.6rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.hero__prompt {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.82rem;
  color: var(--md-default-fg-color--light);
  margin-bottom: 0.4rem;
}
.hero__caret { color: var(--md-typeset-a-color); }
.hero__cmd::after {
  content: "▍";
  color: var(--md-typeset-a-color);
  margin-left: 2px;
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero__tagline {
  font-size: 1.05rem;
  color: var(--md-default-fg-color--light);
  margin: 0.2rem 0 0.4rem;
}
.hero__sub {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.78rem;
  color: var(--md-default-fg-color--lighter);
  margin: 0 0 1.4rem;
}
.accent { color: var(--md-typeset-a-color); font-weight: 600; }

.hero__cta { display: flex; gap: 0.6rem; flex-wrap: wrap; margin-top: 1rem; }
.hero__cta .md-button {
  border-radius: 6px;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.3px;
  border: 1px solid var(--rl-card-border);
  transition: transform .12s, box-shadow .15s, border-color .15s;
}
.hero__cta .md-button:hover {
  transform: translateY(-1px);
  border-color: var(--md-accent-fg-color);
  box-shadow: var(--rl-glow);
}
.hero__cta .md-button--primary {
  background: var(--md-typeset-a-color);
  color: hsl(222, 30%, 10%);
  border-color: transparent;
}

/* ---------- Cards grid ---------- */
.md-typeset .grid.cards > ul > li,
.md-typeset .grid.cards > .admonition {
  border: 1px solid var(--rl-card-border);
  background: var(--rl-card-bg);
  border-radius: 10px;
  transition: transform .15s, border-color .15s, box-shadow .15s;
  position: relative;
  overflow: hidden;
}
.md-typeset .grid.cards > ul > li::before {
  content: "";
  position: absolute; inset: 0 auto auto 0;
  width: 100%; height: 1px;
  background: linear-gradient(90deg, transparent, var(--md-typeset-a-color), transparent);
  opacity: 0; transition: opacity .2s;
}
.md-typeset .grid.cards > ul > li:hover {
  border-color: var(--md-accent-fg-color);
  transform: translateY(-2px);
  box-shadow: var(--rl-glow);
}
.md-typeset .grid.cards > ul > li:hover::before { opacity: 1; }

/* ---------- "Currently" stack on home ---------- */
.stack {
  border-left: 2px solid var(--md-typeset-a-color);
  padding: 0.6rem 1rem;
  margin-top: 2rem;
  background: var(--rl-card-bg);
}
.stack h2 {
  border-top: 0;
  padding-top: 0;
  margin-top: 0;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--md-default-fg-color--light);
  font-weight: 600;
}

/* ---------- Code blocks ---------- */
.md-typeset pre > code,
.md-typeset .highlight pre {
  border: 1px solid var(--rl-line);
  border-radius: 8px;
}

/* ---------- Admonition tweaks (used as paper cards) ---------- */
.md-typeset .admonition.abstract,
.md-typeset details.abstract {
  border-left: 3px solid var(--md-typeset-a-color);
  border-radius: 8px;
}

/* ---------- Search box (kept neutral so it works in both schemes) ---------- */
.md-search__form {
  border-radius: 6px;
  border: 1px solid var(--rl-line);
}

/* ---------- Footer ---------- */
.md-footer { border-top: 1px solid var(--rl-line); }

/* ---------- Selection ---------- */
::selection {
  background: var(--md-typeset-a-color);
  color: hsl(222, 30%, 10%);
}