:root {
  --bg: #F7F6F3;
  --surface: #FFFFFF;
  --surface-2: #F0EEE8;
  --ink: #15171C;
  --ink-2: #3B404B;
  --muted: #697080;
  --line: #E6E2DA;
  --accent: #B4142D;
  --accent-2: #8E0F24;
  --accent-ink: #FFFFFF;
  --accent-soft: #FBEAED;
  --shadow: 0 1px 2px rgba(21, 23, 28, .04), 0 14px 36px -16px rgba(21, 23, 28, .16);
  --radius: 20px;
  --radius-sm: 14px;
  --max: 1080px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0E1014;
    --surface: #161920;
    --surface-2: #1D212A;
    --ink: #EEEFF2;
    --ink-2: #C8CDD5;
    --muted: #9AA1AD;
    --line: #272B34;
    --accent: #F0566B;
    --accent-2: #FF7C8D;
    --accent-ink: #1B0A0D;
    --accent-soft: #2A151A;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 14px 36px -16px rgba(0, 0, 0, .6);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; scroll-padding-top: 76px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "IBM Plex Sans", "IBM Plex Sans Arabic", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
html[data-lang="ar"] body {
  font-family: "IBM Plex Sans Arabic", "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.85;
}
html[data-lang="ar"] .en,
html[data-lang="en"] .ar { display: none !important; }

a { color: inherit; }
img { max-width: 100%; display: block; }
svg { width: 1em; height: 1em; fill: currentColor; }
bdi { unicode-bidi: isolate; }
.wrap { max-width: var(--max); margin-inline: auto; padding-inline: 20px; }

.skip { position: absolute; inset-inline-start: -9999px; top: 12px; z-index: 50; background: var(--accent); color: var(--accent-ink); padding: 10px 14px; border-radius: 10px; }
.skip:focus { inset-inline-start: 12px; }
:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent) 60%, transparent); outline-offset: 3px; border-radius: 8px; }

/* Header */
.top {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--bg) 84%, transparent);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease;
}
.top.scrolled { border-bottom-color: var(--line); }
.top .wrap { display: flex; align-items: center; gap: 16px; height: 64px; }
.mark { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 600; }
.logo {
  width: 34px; height: 34px; border-radius: 10px; flex: none;
  background: var(--accent); color: var(--accent-ink);
  display: grid; place-items: center;
  font: 700 16px/1 "IBM Plex Sans", sans-serif; letter-spacing: -.03em;
}
.nav { display: flex; gap: 2px; margin-inline-start: auto; }
.nav a { padding: 8px 12px; border-radius: 999px; text-decoration: none; color: var(--ink-2); font-size: 15px; }
.nav a:hover { background: var(--surface-2); color: var(--ink); }
.lang {
  margin-inline-start: 6px; cursor: pointer;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink);
  border-radius: 999px; padding: 8px 14px; font: 600 14px/1 inherit;
}
.lang:hover { border-color: var(--accent); }
@media (max-width: 720px) {
  .nav { display: none; }
  .lang { margin-inline-start: auto; }
}

/* Hero */
.hero { padding: 48px 0 56px; }
.hero .wrap { display: grid; grid-template-columns: 1.2fr .8fr; gap: 56px; align-items: center; }
.kicker {
  display: inline-flex; align-items: center; gap: 10px;
  font: 500 13px/1.4 "IBM Plex Mono", ui-monospace, monospace;
  letter-spacing: .08em; text-transform: uppercase; color: var(--accent);
}
html[data-lang="ar"] .kicker { font: 600 15px/1.5 "IBM Plex Sans Arabic", sans-serif; letter-spacing: 0; text-transform: none; }
.kicker::before { content: ""; width: 22px; height: 2px; border-radius: 2px; background: currentColor; }
h1 { font-size: clamp(42px, 6.4vw, 72px); line-height: 1.04; letter-spacing: -.03em; margin: 14px 0 18px; font-weight: 700; }
html[data-lang="ar"] h1 { letter-spacing: 0; line-height: 1.2; }
.lead { font-size: clamp(21px, 2.5vw, 27px); line-height: 1.4; margin: 0 0 14px; font-weight: 500; }
.sub { color: var(--ink-2); margin: 0 0 22px; max-width: 58ch; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 28px; padding: 0; list-style: none; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 12px; border-radius: 999px; font-size: 14px;
  background: var(--surface); border: 1px solid var(--line); color: var(--ink-2);
}
.chip svg { width: 15px; height: 15px; color: var(--accent); }
.cta { display: flex; flex-wrap: wrap; gap: 10px; }
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 18px; border-radius: 14px; text-decoration: none;
  font-weight: 600; font-size: 15.5px;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink);
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
}
.btn:hover { transform: translateY(-1px); border-color: color-mix(in srgb, var(--ink) 28%, var(--line)); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { background: var(--accent-2); border-color: var(--accent-2); }
.btn svg { width: 18px; height: 18px; }
html[dir="rtl"] .flip { transform: scaleX(-1); }

.photo { position: relative; margin: 0; width: 100%; max-width: 420px; justify-self: center; }
.photo img {
  width: 100%; height: auto; aspect-ratio: 4 / 5; object-fit: cover;
  border-radius: 28px; border: 1px solid var(--line); box-shadow: var(--shadow);
  background: #E8E8E8;
}
.photo::after {
  content: "yh.sa"; position: absolute; inset-block-end: 16px; inset-inline-start: 16px;
  font: 600 13px/1 "IBM Plex Mono", monospace; direction: ltr;
  padding: 9px 11px; border-radius: 10px; color: var(--ink);
  background: color-mix(in srgb, var(--surface) 86%, transparent);
  border: 1px solid var(--line);
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
}
@media (max-width: 860px) {
  .hero { padding-top: 28px; }
  .hero .wrap { grid-template-columns: 1fr; gap: 28px; }
  .photo { order: -1; max-width: 300px; }
}

/* Sections */
section.block { padding: 64px 0; border-top: 1px solid var(--line); }
.head { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 8px 20px; margin-bottom: 28px; }
h2 { font-size: clamp(27px, 3.3vw, 38px); line-height: 1.15; letter-spacing: -.02em; margin: 0; }
html[data-lang="ar"] h2 { letter-spacing: 0; line-height: 1.35; }
.head p { margin: 0; color: var(--muted); }

.about { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.about p { margin: 0; color: var(--ink-2); font-size: 17.5px; }
@media (max-width: 760px) { .about { grid-template-columns: 1fr; gap: 16px; } }

.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
@media (max-width: 760px) { .cards { grid-template-columns: 1fr; } }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.ic { width: 44px; height: 44px; border-radius: 13px; display: grid; place-items: center; font-size: 22px; background: var(--accent-soft); margin-bottom: 16px; }
.card h3 { margin: 0 0 6px; font-size: 19px; }
.card p { margin: 0 0 16px; color: var(--ink-2); font-size: 16px; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 0; padding: 0; list-style: none; }
.tags li { direction: ltr; font: 500 12.5px/1 "IBM Plex Mono", monospace; padding: 7px 9px; border-radius: 8px; background: var(--surface-2); color: var(--ink-2); }

/* Timeline */
.timeline { list-style: none; margin: 0; padding: 0; position: relative; }
.timeline::before { content: ""; position: absolute; inset-block: 8px; inset-inline-start: 7px; width: 2px; background: var(--line); }
.tl { position: relative; padding-inline-start: 38px; padding-bottom: 30px; }
.tl:last-child { padding-bottom: 0; }
.tl::before {
  content: ""; position: absolute; inset-inline-start: 0; top: 7px;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--bg); border: 3px solid var(--accent);
}
.tl.past::before { border-color: color-mix(in srgb, var(--muted) 70%, var(--line)); }
.when { font: 500 13px/1.4 "IBM Plex Mono", monospace; color: var(--muted); }
html[data-lang="ar"] .when { font: 500 14.5px/1.5 "IBM Plex Sans Arabic", sans-serif; }
.tl h3 { margin: 2px 0; font-size: 20px; }
.org { color: var(--ink-2); font-weight: 500; margin-bottom: 8px; }
.tl ul { margin: 0; padding-inline-start: 18px; color: var(--ink-2); }
.tl li { margin: 3px 0; }
.badge { display: inline-block; vertical-align: middle; margin-inline-start: 10px; font-size: 12px; font-weight: 600; padding: 3px 9px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); }

/* Education */
.two { display: grid; grid-template-columns: 1fr 1.3fr; gap: 28px; }
@media (max-width: 860px) { .two { grid-template-columns: 1fr; } }
.sub-h { margin: 0 0 12px; font-size: 13px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
html[data-lang="ar"] .sub-h { font-size: 15px; letter-spacing: 0; text-transform: none; }
.list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.list li { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 14px 16px; }
.list b { display: block; font-weight: 600; }
.list li > span { color: var(--muted); font-size: 15px; }

/* Skills */
.skills { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
@media (max-width: 760px) { .skills { grid-template-columns: 1fr; } }
.skill { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.skill h3 { margin: 0 0 12px; font-size: 16.5px; }
.skill ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.skill li { direction: ltr; font-size: 14px; padding: 6px 11px; border-radius: 999px; background: var(--surface-2); color: var(--ink-2); }

/* Beyond work */
.tiles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
@media (max-width: 860px) { .tiles { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .tiles { grid-template-columns: 1fr; } }
.tile { display: flex; gap: 14px; align-items: flex-start; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.em { font-size: 26px; line-height: 1.2; }
.tile b { display: block; }
.tile div > span { color: var(--muted); font-size: 14.5px; }

/* Contact */
.contact {
  display: grid; grid-template-columns: .9fr 1.1fr; gap: 32px; align-items: center;
  background: var(--surface); border: 1px solid var(--line); border-radius: 28px;
  padding: clamp(24px, 4vw, 44px); box-shadow: var(--shadow);
}
@media (max-width: 860px) { .contact { grid-template-columns: 1fr; } }
.contact p { margin: 10px 0 0; color: var(--ink-2); }
.socials { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
@media (max-width: 480px) { .socials { grid-template-columns: 1fr; } }
.soc {
  display: flex; align-items: center; gap: 12px; padding: 14px 16px;
  border-radius: 14px; border: 1px solid var(--line); background: var(--bg);
  text-decoration: none; transition: border-color .15s ease, transform .15s ease;
}
.soc:hover { border-color: var(--accent); transform: translateY(-1px); }
.soc svg { width: 22px; height: 22px; flex: none; }
.soc b { display: block; font-size: 15px; line-height: 1.3; }
.soc .h { display: block; color: var(--muted); font-size: 13.5px; line-height: 1.4; }
.soc.wide { grid-column: 1 / -1; }
.soc.primary { grid-column: 1 / -1; background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.soc.primary .h { color: color-mix(in srgb, var(--accent-ink) 78%, transparent); }

footer { padding: 36px 0 48px; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
footer a { text-decoration: none; }
footer a:hover { color: var(--ink); }

/* A soft entrance for the hero only — pure CSS, so content never depends on JS to appear */
@keyframes rise { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
.hero .intro { animation: rise .7s ease both; }
.hero .photo { animation: rise .7s .12s ease both; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero .intro, .hero .photo { animation: none; }
  .btn, .soc { transition: none; }
}