/* ------------------------------------------------------------------
   Global minimal theme
   ------------------------------------------------------------------ */

/* Light, quiet footer instead of the default dark block */
:root {
  --md-footer-bg-color: transparent;
  --md-footer-bg-color--dark: transparent;
  --md-footer-fg-color: var(--md-default-fg-color);
  --md-footer-fg-color--light: var(--md-default-fg-color--light);
  --md-footer-fg-color--lighter: var(--md-default-fg-color--lighter);
}

body,
input {
  /* System font stack (theme.font: false — no Google Fonts request):
     Latin on the system UI font, CJK on PingFang / Hiragino / YaHei */
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    sans-serif;
}

/* Header + tabs: fully transparent so the page reads as one surface —
   the body background (and the homepage glow) flows straight through.
   A light backdrop blur keeps text readable when content scrolls under. */
.md-header,
.md-tabs {
  background: transparent;
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  backdrop-filter: saturate(180%) blur(14px);
  box-shadow: none;
}

.md-header[data-md-state="shadow"],
.md-header--shadow {
  box-shadow: none;
}

.md-tabs__link {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  opacity: 0.65;
  transition: opacity 0.2s ease;
}

.md-tabs__link--active,
.md-tabs__link:hover,
.md-tabs__link:focus {
  opacity: 1;
}

/* No logo — the site name alone is the brand */
.md-header__button.md-logo {
  display: none;
}

/* Align the title with the tabs below:
   tabs text sits at .2rem (list margin) + .6rem (item padding) = .8rem;
   the theme's [dir=ltr] rule puts the title at .2rem + 1rem = 1.2rem,
   so pull it back to .2rem + .6rem = .8rem */
[dir="ltr"] .md-header__title {
  margin-left: 0.6rem;
}

.md-header__topic,
.md-header__title {
  font-weight: 700;
  letter-spacing: -0.01em;
}

/* Search field: quieter */
.md-search__form {
  border-radius: 999px;
}

[data-md-toggle="search"]:checked ~ .md-header .md-search__form {
  border-radius: 0.6rem 0.6rem 0 0;
}

/* Footer: thin divider, light text */
.md-footer {
  border-top: 1px solid var(--md-default-fg-color--lightest);
}

/* Typography: tighter headings, comfortable body */
.md-typeset h1,
.md-typeset h2,
.md-typeset h3 {
  font-weight: 700;
  letter-spacing: -0.015em;
}

/* Blog list: confident titles over quiet metadata.
   System CJK fonts render true bold at 700 — keep title weight here. */
.md-post .md-post__content h1,
.md-post .md-post__content h2 {
  margin: 0.3rem 0 0.6rem;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.5;
  color: var(--md-default-fg-color);
}

.md-post .md-post__content h1 a,
.md-post .md-post__content h2 a {
  color: inherit;
  /* animated underline: grows from the left on hover */
  background-image: linear-gradient(
    var(--md-accent-fg-color),
    var(--md-accent-fg-color)
  );
  background-size: 0 2px;
  background-position: 0 100%;
  background-repeat: no-repeat;
  transition: color 0.2s ease, background-size 0.25s ease;
}

.md-post .md-post__content h1 a:hover,
.md-post .md-post__content h1 a:focus,
.md-post .md-post__content h2 a:hover,
.md-post .md-post__content h2 a:focus {
  color: var(--md-accent-fg-color);
  background-size: 100% 2px;
}

/* Metadata line above the title: smaller and quieter,
   so the title carries the visual weight */
.md-post__header {
  font-size: 0.68rem;
  color: var(--md-default-fg-color--lighter);
}

.md-typeset {
  line-height: 1.75;
}

/* Softer corners for code */
.md-typeset pre > code {
  border-radius: 0.55rem;
}

.md-typeset code {
  border-radius: 0.25rem;
}

/* ------------------------------------------------------------------
   Homepage — a quiet, vertically centered personal card
   ------------------------------------------------------------------ */

.mdx-home {
  position: relative;
  isolation: isolate;
  display: flex;
  align-items: center;
  justify-content: center;
  /* viewport minus header + tabs + footer, so the card sits centered
     in the visible area without scrolling */
  min-height: calc(100vh - 11rem);
}

/* Soft ambient glow behind the card: a cool blue top-left,
   a faint violet bottom-right. Fixed to the viewport so it fills
   the whole page — including the header/footer whitespace — and
   shows through the frosted header. Alphas are the whole design —
   keep them barely visible. */
.mdx-home::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(34rem 26rem at 14% 12%, rgba(99, 102, 241, 0.09), transparent 62%),
    radial-gradient(30rem 24rem at 86% 88%, rgba(168, 85, 247, 0.07), transparent 62%);
}

/* Dark scheme needs slightly stronger glow to read over the dark base */
[data-md-color-scheme="slate"] .mdx-home::before {
  background:
    radial-gradient(34rem 26rem at 16% 18%, rgba(99, 102, 241, 0.14), transparent 62%),
    radial-gradient(30rem 24rem at 84% 82%, rgba(168, 85, 247, 0.11), transparent 62%);
}

.mdx-home__inner {
  max-width: 30rem;
  margin: 0 auto;
  padding: 2rem 1rem;
  text-align: center;
}

/* Staggered entrance: name, then bio, then links */
.mdx-home__inner > * {
  animation: mdx-fade 0.7s ease both;
}

.mdx-home__inner > *:nth-child(2) {
  animation-delay: 0.12s;
}

.mdx-home__inner > *:nth-child(3) {
  animation-delay: 0.24s;
}

/* Name */
.mdx-home__inner h1 {
  margin: 0 0 1.3rem;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--md-default-fg-color);
}

/* Bio */
.mdx-home__inner > p {
  max-width: 24rem;
  margin: 0 auto;
  color: var(--md-default-fg-color--light);
  line-height: 2;
}

/* Quiet inline links under the bio */
.mdx-home__inner .home-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.7rem;
  margin: 2.2rem auto 0;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}

.mdx-home__inner .home-links span {
  color: var(--md-default-fg-color--lightest);
}

.mdx-home__inner .home-links a {
  color: var(--md-default-fg-color--light);
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.mdx-home__inner .home-links a:hover,
.mdx-home__inner .home-links a:focus {
  color: var(--md-accent-fg-color);
  border-color: var(--md-accent-fg-color);
}

/* 404 page */
.mdx-404 {
  text-align: center;
}

.mdx-404 h1 {
  margin: 0 0 0.8rem;
  font-size: 3.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--md-default-fg-color--lightest);
}

@keyframes mdx-fade {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .mdx-home__inner > * {
    animation: none;
  }
}

@media screen and (max-width: 44.9375em) {
  .mdx-home {
    /* tabs bar is hidden on narrow screens */
    min-height: calc(100vh - 9rem);
  }

  .mdx-home__inner h1 {
    font-size: 1.7rem;
  }
}