/* Moonlit night. Self-hosted fonts (SIL OFL, see fonts/OFL.txt). */
@font-face {
  font-family: "Newsreader Variable";
  font-style: normal;
  font-display: swap;
  font-weight: 200 800;
  src: url(fonts/newsreader-latin-wght-normal.woff2) format("woff2-variations");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: "Newsreader Variable";
  font-style: italic;
  font-display: swap;
  font-weight: 200 800;
  src: url(fonts/newsreader-latin-wght-italic.woff2) format("woff2-variations");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: "JetBrains Mono Variable";
  font-style: normal;
  font-display: swap;
  font-weight: 100 800;
  src: url(fonts/jetbrains-mono-latin-wght-normal.woff2) format("woff2-variations");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: "Noto Naskh Arabic Variable";
  font-style: normal;
  font-display: swap;
  font-weight: 400 700;
  src: url(fonts/noto-naskh-arabic-arabic-wght-normal.woff2) format("woff2-variations");
  unicode-range: U+0600-06FF, U+0750-077F, U+0870-088E, U+0890-0891, U+0897-08E1, U+08E3-08FF, U+200C-200E, U+2010-2011, U+204F, U+2E41, U+FB50-FDFF, U+FE70-FE74, U+FE76-FEFC;
}

/* The avatar glides from the middle of the home page to the corner of a writeup. */
@view-transition {
  navigation: auto;
}

:root {
  --sky-top: #142449;
  --sky-mid: #1c315f;
  --sky-low: #101b3b;
  --moonlight: 246, 240, 205;
  --panel: rgba(12, 20, 44, 0.72);
  --panel-deep: rgba(7, 12, 30, 0.72);
  --moon: #e7eaf4;
  --bright: #f7f8fc;
  --haze: #a3acc9;
  --cloud: #c6c1ff;
  --line: rgba(198, 193, 255, 0.14);
  --serif: "Newsreader Variable", "Noto Naskh Arabic Variable", Georgia, "Times New Roman", serif;
  --mono: "JetBrains Mono Variable", ui-monospace, "Cascadia Code", Menlo, Consolas, monospace;
  --glow-x: 50%;
  --glow-size: 44rem 30rem;
}

.page-post {
  --glow-x: max(1.5rem, calc(50% - 22rem));
  --glow-size: 26rem 18rem;
}

[dir="rtl"] .page-post {
  --glow-x: min(calc(100% - 1.5rem), calc(50% + 22rem));
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
  background: var(--sky-low);
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: clip;
  background: transparent;
  color: var(--moon);
  font-family: var(--serif);
  font-size: 1.1875rem;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: rgba(108, 92, 231, 0.55);
  color: var(--bright);
}

:focus-visible {
  outline: 2px solid var(--cloud);
  outline-offset: 3px;
  border-radius: 0.3rem;
}

/* ---------- The sky ---------- */

.sky {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
  background: linear-gradient(180deg, var(--sky-top) 0%, var(--sky-mid) 45%, var(--sky-low) 100%);
}

/* Moonlight, centered on the avatar. */
.sky::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(var(--glow-size) at var(--glow-x) 9rem, rgba(var(--moonlight), 0.2), rgba(var(--moonlight), 0.06) 45%, transparent 72%);
}

.stars {
  position: absolute;
  inset: 0;
  opacity: 0.55;
  background-image:
    radial-gradient(1.2px 1.2px at 12% 18%, #fff, transparent),
    radial-gradient(1px 1px at 33% 62%, #fff, transparent),
    radial-gradient(1.4px 1.4px at 58% 12%, #fff, transparent),
    radial-gradient(1px 1px at 74% 44%, #fff, transparent),
    radial-gradient(1.2px 1.2px at 88% 76%, #fff, transparent),
    radial-gradient(1px 1px at 22% 88%, #fff, transparent),
    radial-gradient(1px 1px at 46% 34%, rgba(255, 255, 255, 0.7), transparent),
    radial-gradient(1px 1px at 92% 22%, rgba(255, 255, 255, 0.7), transparent);
  background-size: 540px 420px;
}

.cloud {
  position: absolute;
  aspect-ratio: var(--ratio);
  background: var(--img) center / contain no-repeat;
  filter: drop-shadow(0 10px 18px rgba(4, 8, 24, 0.35));
  animation: drift var(--time, 60s) ease-in-out infinite alternate;
}

.cloud-1 {
  --img: url(cloud-a.svg);
  --ratio: 520 / 130;
  --time: 64s;
  top: 7vh;
  left: -6vw;
  width: clamp(260px, 34vw, 560px);
}

.cloud-2 {
  --img: url(cloud-b.svg);
  --ratio: 420 / 110;
  --time: 52s;
  top: 24vh;
  right: -5vw;
  width: clamp(200px, 27vw, 440px);
  animation-direction: alternate-reverse;
}

.cloud-3 {
  --img: url(cloud-c.svg);
  --ratio: 560 / 96;
  --time: 72s;
  top: 60vh;
  left: -8vw;
  width: clamp(240px, 32vw, 560px);
  opacity: 0.85;
}

.cloud-4 {
  --img: url(cloud-a.svg);
  --ratio: 520 / 130;
  --time: 58s;
  top: 80vh;
  right: -9vw;
  width: clamp(220px, 28vw, 480px);
  opacity: 0.75;
  animation-direction: alternate-reverse;
}

/* Calmer sky behind long reading. */
.page-post .cloud {
  opacity: 0.38;
}

@keyframes drift {
  from {
    transform: translateX(-2.5vw);
  }
  to {
    transform: translateX(2.5vw);
  }
}

/* ---------- Layout ---------- */

.wrap {
  width: min(44rem, calc(100% - 2.5rem));
  margin-inline: auto;
  padding: 3.5rem 0 5rem;
}

.page-post .wrap {
  width: min(48rem, calc(100% - 2rem));
  padding-top: 2rem;
}

/* Home: the avatar is the moon, centered. */
header {
  display: flex;
  justify-content: center;
  padding: 1.5rem 0 0.5rem;
}

.name {
  margin: 0;
  line-height: 0;
}

.name a {
  position: relative;
  display: inline-block;
  border-radius: 50%;
  isolation: isolate;
}

.name a::before {
  content: "";
  position: absolute;
  inset: -38%;
  z-index: -1;
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(var(--moonlight), 0.3), rgba(var(--moonlight), 0.08) 60%, transparent);
}

.avatar {
  display: block;
  view-transition-name: avatar;
  transition: transform 0.45s cubic-bezier(0.34, 1.56, 0.64, 1), filter 0.45s ease;
}

.name .avatar {
  width: clamp(8.5rem, 24vw, 10rem);
  height: auto;
  filter: drop-shadow(0 0 1.4rem rgba(var(--moonlight), 0.28));
}

.name a:hover .avatar,
.name a:focus-visible .avatar {
  transform: rotate(-6deg) scale(1.04);
}

/* Writeup: the avatar shrinks to the corner. */
.home {
  margin: 0 0 1.75rem;
  line-height: 0;
}

.home a {
  display: inline-block;
  border-radius: 50%;
}

.home .avatar {
  width: 2.5rem;
  height: auto;
  filter: drop-shadow(0 0 0.6rem rgba(var(--moonlight), 0.3));
}

.home a:hover .avatar,
.home a:focus-visible .avatar {
  transform: rotate(-10deg) scale(1.08);
}

/* ---------- Writeup list ---------- */

.year-block {
  margin-top: 3rem;
}

.year {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 0 0 1.1rem;
  color: var(--haze);
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 500;
}

.year::before,
.year::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.index {
  display: grid;
  gap: 0.9rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.index li {
  position: relative;
  padding: 1.2rem 1.4rem 1.3rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--panel);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.index li:hover,
.index li:focus-within {
  border-color: rgba(198, 193, 255, 0.5);
  transform: translateY(-2px);
  box-shadow: 0 22px 44px -28px rgba(0, 0, 0, 0.9), 0 0 0 1px rgba(198, 193, 255, 0.12);
}

.index time {
  display: block;
  color: var(--haze);
  font-family: var(--mono);
  font-size: 0.78rem;
}

.index a {
  display: block;
  margin-top: 0.2rem;
  color: var(--bright);
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: -0.012em;
  line-height: 1.25;
  text-decoration: none;
}

/* The whole card is the link. */
.index a::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
}

.index a:focus-visible {
  outline: none;
}

.index li:focus-within {
  outline: 2px solid var(--cloud);
  outline-offset: 3px;
}

.summary {
  margin: 0.45rem 0 0;
  color: var(--haze);
  font-size: 1.02rem;
  line-height: 1.5;
}

.empty {
  margin: 2.8rem 0 0;
  text-align: center;
  color: var(--haze);
}

/* ---------- Writeup page ---------- */

.post-title {
  margin: 0 0 0.4rem;
  color: var(--bright);
  font-size: clamp(2.1rem, 4.6vw, 3rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.12;
  text-wrap: balance;
}

.when {
  margin: 0 0 1.6rem;
  color: var(--haze);
  font-family: var(--mono);
  font-size: 0.82rem;
}

.page-post article {
  padding: clamp(1.25rem, 4vw, 2.5rem);
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  background: rgba(10, 17, 38, 0.86);
  box-shadow: 0 40px 80px -50px rgba(0, 0, 0, 0.95);
}

.lang {
  margin: 1rem 0 1.25rem;
}

a.lang-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 2rem;
  padding: 0.3rem 0.95rem 0.34rem;
  border: 1px solid rgba(198, 193, 255, 0.45);
  border-radius: 999px;
  color: var(--cloud);
  font-size: 0.92rem;
  line-height: 1;
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease;
}

a.lang-btn::before {
  content: "";
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.6;
}

a.lang-btn:hover,
a.lang-btn:focus-visible {
  background: var(--cloud);
  border-color: var(--cloud);
  color: #101b3b;
}

article {
  overflow-wrap: break-word;
}

article > :first-child {
  margin-top: 0;
}

article p {
  margin: 1rem 0;
  text-wrap: pretty;
}

article h2,
article h3,
article h4 {
  margin: 2.4rem 0 0.6rem;
  color: var(--bright);
  font-weight: 560;
  letter-spacing: -0.012em;
  line-height: 1.25;
}

article h2 {
  font-size: 1.6rem;
}

article h3 {
  font-size: 1.42rem;
}

article h4 {
  font-size: 1.15rem;
}

article a {
  color: var(--cloud);
  text-decoration-color: rgba(198, 193, 255, 0.4);
  text-underline-offset: 0.16em;
}

article a:hover {
  text-decoration-color: currentColor;
}

article strong {
  color: var(--bright);
  font-weight: 620;
}

article ul,
article ol {
  margin: 0.9rem 0;
  padding-left: 1.3rem;
}

article li {
  margin: 0.35rem 0;
}

article li::marker {
  color: var(--cloud);
}

article code,
article pre {
  font-family: var(--mono);
}

article p code,
article li code,
article td code,
article h2 code,
article h3 code,
article h4 code {
  padding: 0.08em 0.36em;
  border: 1px solid var(--line);
  border-radius: 0.3em;
  background: var(--panel-deep);
  color: var(--bright);
  font-size: 0.82em;
  overflow-wrap: anywhere;
}

article figure.snippet {
  max-width: 100%;
  margin: 1.2rem 0 1.4rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 0.7rem;
  background: var(--panel-deep);
}

article figure.snippet figcaption {
  margin: 0;
  padding: 0.45rem 0.95rem;
  border-bottom: 1px solid var(--line);
  color: var(--cloud);
  font-family: var(--mono);
  font-size: 0.74rem;
  font-weight: 500;
  line-height: 1.3;
}

article pre {
  max-width: 100%;
  margin: 1.2rem 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line);
  border-radius: 0.7rem;
  background: var(--panel-deep);
  color: #d9def0;
  font-size: 0.84rem;
  line-height: 1.6;
  tab-size: 2;
}

article figure.snippet pre {
  margin: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
}

article pre code {
  padding: 0;
  border: 0;
  background: transparent;
  font-size: inherit;
}

article blockquote {
  margin: 1.4rem 0;
  padding: 0.1rem 0 0.1rem 1.1rem;
  border-left: 2px solid var(--cloud);
  color: #dcd8ff;
  font-size: 1.15em;
  font-style: italic;
  line-height: 1.55;
}

article blockquote p {
  margin: 0.4rem 0;
}

article hr {
  margin: 2.4rem 0;
  border: 0;
  border-top: 1px solid var(--line);
}

.table-scroll {
  max-width: 100%;
  margin: 1.2rem 0 1.5rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line);
  border-radius: 0.7rem;
  background: var(--panel-deep);
}

article table {
  width: 100%;
  margin: 0;
  border-collapse: collapse;
  font-size: 0.98rem;
  font-variant-numeric: tabular-nums;
}

.table-scroll th,
.table-scroll td {
  padding: 0.6rem 0.85rem;
  white-space: nowrap;
}

article th,
article td {
  padding: 0.5rem 0.35rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

article tr:last-child td {
  border-bottom: 0;
}

article th {
  color: var(--cloud);
  font-weight: 500;
}

article img {
  display: block;
  max-width: 100%;
  height: auto;
}

/* Screenshots: as wide as the text, open full size on click. */
article figure.shot {
  margin: 1.8rem 0 2rem;
}

article figure.shot a {
  display: block;
  width: fit-content;
  max-width: 100%;
  margin-inline: auto;
  border-radius: 0.7rem;
  cursor: zoom-in;
}

article figure.shot img {
  border: 1px solid var(--line);
  border-radius: 0.7rem;
  background: #2b2b2b;
  box-shadow: 0 24px 48px -28px rgba(0, 0, 0, 0.95);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

article figure.shot a:hover img {
  border-color: rgba(198, 193, 255, 0.55);
  box-shadow: 0 0 0 1px rgba(198, 193, 255, 0.35), 0 24px 48px -28px rgba(0, 0, 0, 0.95);
}

article figure.shot figcaption {
  margin: 0.7rem auto 0;
  color: var(--haze);
  font-size: 0.95rem;
  line-height: 1.45;
}

article > figure.shot:first-child {
  margin-top: 0;
}

article figure.shot + p.lang {
  margin-top: -0.6rem;
}

/* ---------- Arabic (right to left) ---------- */

html[dir="rtl"] body {
  font-size: 1.125rem;
  line-height: 1.95;
}

[dir="rtl"] .post-title,
[dir="rtl"] article h2,
[dir="rtl"] article h3,
[dir="rtl"] article h4,
[dir="rtl"] .index a {
  letter-spacing: 0;
  line-height: 1.5;
}

[dir="rtl"] article ul,
[dir="rtl"] article ol {
  padding-left: 0;
  padding-right: 1.3rem;
}

[dir="rtl"] article blockquote {
  padding: 0.1rem 1.1rem 0.1rem 0;
  border-left: 0;
  border-right: 2px solid var(--cloud);
}

[dir="rtl"] article th,
[dir="rtl"] article td {
  text-align: right;
}

[dir="rtl"] article figure.snippet,
[dir="rtl"] article figure.snippet figcaption,
[dir="rtl"] article pre {
  direction: ltr;
  text-align: left;
}

[dir="rtl"] article bdi {
  white-space: nowrap;
}

/* ---------- Small screens ---------- */

@media (max-width: 700px) {
  body {
    font-size: 1.0625rem;
  }

  .wrap,
  .page-post .wrap {
    width: calc(100% - 1.5rem);
    padding: 1.5rem 0 3rem;
  }

  header {
    padding-top: 1rem;
  }

  .index li {
    padding: 1rem 1.1rem 1.1rem;
  }

  .index a {
    font-size: 1.3rem;
  }

  .post-title {
    font-size: 1.9rem;
  }

  .page-post article {
    padding: 1.1rem 1rem 1.4rem;
    border-radius: 1rem;
  }

  article h3 {
    font-size: 1.25rem;
  }

  article pre,
  article figure.snippet pre {
    padding: 0.8rem 0.75rem;
    font-size: 0.76rem;
    line-height: 1.5;
  }

  .cloud-1 {
    top: 4vh;
    left: -30vw;
    width: 80vw;
  }

  .cloud-2 {
    top: 30vh;
    right: -35vw;
    width: 70vw;
  }

  .cloud-3 {
    top: 62vh;
    left: -40vw;
    width: 85vw;
  }

  .cloud-4 {
    top: 86vh;
    right: -40vw;
    width: 75vw;
  }
}

/* ---------- Motion and print ---------- */

@media (prefers-reduced-motion: reduce) {
  @view-transition {
    navigation: none;
  }

  .cloud {
    animation: none;
  }

  .avatar,
  .index li,
  article figure.shot img,
  a.lang-btn {
    transition: none;
  }
}

@media print {
  .sky {
    display: none;
  }

  body {
    background: #fff;
    color: #111;
  }

  .page-post article {
    border: 0;
    background: none;
    box-shadow: none;
  }

  .wrap {
    width: auto;
    padding: 0;
  }
}