/* ==========================================================================
   Mohamed Eyad · portfolio
   Plain CSS, no build step. Colours and sizes live in the tokens below.
   ========================================================================== */

@font-face {
  font-family: "Inter";
  src: url("../fonts/inter-latin-wght.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Space Grotesk";
  src: url("../fonts/space-grotesk-latin-wght.woff2") format("woff2");
  font-weight: 300 700;
  font-style: normal;
  font-display: swap;
}

/* ---------- tokens ---------- */
:root {
  --bg: #ffffff;
  --bg-soft: #f3f6f8;
  --surface: #ffffff;
  --surface-2: #f6f8fa;
  --ink: #0e1a26;
  --ink-2: #2f4254;
  --muted: #5c6d7c;
  --line: #e1e7ed;
  --line-strong: #c9d4de;
  --accent: #4acaa8;            /* brand teal, kept from the original site */
  --accent-strong: #0d7a61;     /* teal for text on light backgrounds */
  --accent-soft: #e2f6ef;
  --accent-ink: #052a20;        /* text on teal buttons */
  --dark: #0b1a24;              /* hero, header and footer */
  --dark-2: #0f2733;
  --on-dark: #eef4f7;
  --on-dark-muted: #a3b6c3;
  --dark-line: rgba(163, 182, 195, .22);
  --shadow-sm: 0 1px 2px rgba(14, 26, 38, .06);
  --shadow: 0 1px 2px rgba(14, 26, 38, .05), 0 12px 32px -14px rgba(14, 26, 38, .22);
  --radius: 14px;
  --radius-lg: 20px;
  --container: 1140px;
  --gutter: 24px;
  --header-h: 64px;
  --font-sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: "Space Grotesk", "Inter", ui-sans-serif, system-ui, sans-serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a131b;
    --bg-soft: #0e1a24;
    --surface: #111f2a;
    --surface-2: #142431;
    --ink: #e8eff4;
    --ink-2: #c3cfd9;
    --muted: #8ea0af;
    --line: #1e3040;
    --line-strong: #2b4255;
    --accent-strong: #5fd6b5;
    --accent-soft: #10342b;
    --dark: #08121a;
    --dark-2: #0c2029;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, .35);
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 14px 34px -14px rgba(0, 0, 0, .65);
    color-scheme: dark;
  }
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 12px); }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink-2);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
img, video, svg, iframe { display: block; max-width: 100%; }
img, video { height: auto; }
h1, h2, h3, h4 {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-display);
  font-weight: 650;
  line-height: 1.15;
  letter-spacing: -0.015em;
}
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; }
a { color: var(--accent-strong); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
strong, b { color: var(--ink); font-weight: 650; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
::selection { background: rgba(74, 202, 168, .3); }

.icon { width: 1.15em; height: 1.15em; flex: none; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.icon.solid { fill: currentColor; stroke: none; }

.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: 16px; top: -60px; z-index: 100;
  padding: 10px 16px; border-radius: 10px;
  background: var(--accent); color: var(--accent-ink); font-weight: 600; text-decoration: none;
}
.skip-link:focus { top: 12px; }

.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .55em;
  min-height: 46px; padding: .7em 1.2em;
  border: 1.5px solid transparent; border-radius: 12px;
  font: 600 .98rem/1.1 var(--font-sans);
  text-decoration: none; cursor: pointer;
  transition: background-color .18s ease, border-color .18s ease, color .18s ease, transform .18s ease, box-shadow .18s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: var(--accent-ink); box-shadow: 0 6px 18px -8px rgba(74, 202, 168, .8); }
.btn-primary:hover { background: #5fd6b5; }
.btn-ghost { border-color: var(--line-strong); color: var(--ink); background: var(--surface); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-strong); }
.on-dark .btn-ghost, .btn-ghost.on-dark { background: rgba(255, 255, 255, .04); border-color: var(--dark-line); color: var(--on-dark); }
.on-dark .btn-ghost:hover, .btn-ghost.on-dark:hover { border-color: var(--accent); color: #fff; background: rgba(74, 202, 168, .1); }
.btn-sm { min-height: 38px; padding: .5em .9em; font-size: .9rem; border-radius: 10px; }

.icon-btn {
  display: inline-grid; place-items: center; width: 44px; height: 44px; border-radius: 12px;
  border: 1.5px solid var(--line-strong); color: var(--ink); background: var(--surface);
  transition: border-color .18s ease, color .18s ease, background-color .18s ease, transform .18s ease;
}
.icon-btn:hover { border-color: var(--accent); color: var(--accent-strong); transform: translateY(-1px); }
.icon-btn .icon { width: 20px; height: 20px; }
.on-dark .icon-btn { border-color: var(--dark-line); color: var(--on-dark); background: rgba(255, 255, 255, .04); }
.on-dark .icon-btn:hover { border-color: var(--accent); color: #fff; background: rgba(74, 202, 168, .1); }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 26, 36, .86);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.site-header.is-scrolled { border-bottom-color: var(--dark-line); box-shadow: 0 8px 24px -16px rgba(0, 0, 0, .6); }
.header-inner { display: flex; align-items: center; gap: 24px; height: var(--header-h); }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--on-dark); text-decoration: none; font: 650 1.05rem/1 var(--font-display); letter-spacing: -0.01em; }
.brand:hover { text-decoration: none; color: #fff; }
.brand-mark {
  display: inline-flex; align-items: center; justify-content: center; width: 34px; height: 34px; border-radius: 10px;
  background: linear-gradient(150deg, #133240, #0b1a24); border: 1px solid var(--dark-line);
  font: 700 .82rem/1 var(--font-display); letter-spacing: -0.02em; color: #fff;
}
.brand-mark span { color: var(--accent); }
.nav { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.nav-links { display: flex; align-items: center; gap: 2px; list-style: none; }
.nav-links a {
  display: block; padding: 8px 12px; border-radius: 9px;
  color: var(--on-dark-muted); font-size: .94rem; font-weight: 500; text-decoration: none;
  transition: color .15s ease, background-color .15s ease;
}
.nav-links a:hover { color: #fff; background: rgba(255, 255, 255, .06); }
.nav-links a.is-active { color: #fff; }
.nav-links a.is-active::after { content: ""; display: block; height: 2px; margin-top: 3px; border-radius: 2px; background: var(--accent); }
.nav .btn { margin-left: 10px; }
.nav-toggle {
  display: none; margin-left: auto; width: 44px; height: 44px; border-radius: 11px;
  border: 1px solid var(--dark-line); background: transparent; color: var(--on-dark); cursor: pointer;
}
.nav-toggle .icon { width: 22px; height: 22px; margin: auto; }
.nav-toggle .icon-close { display: none; }
.site-header.nav-open .nav-toggle .icon-open { display: none; }
.site-header.nav-open .nav-toggle .icon-close { display: block; }

@media (max-width: 900px) {
  .nav-toggle { display: grid; place-items: center; }
  .nav {
    position: absolute; top: var(--header-h); left: 0; right: 0;
    display: none; flex-direction: column; align-items: stretch; gap: 6px;
    padding: 12px var(--gutter) 20px;
    background: rgba(11, 26, 36, .98); border-bottom: 1px solid var(--dark-line);
  }
  .site-header.nav-open .nav { display: flex; }
  .nav-links { flex-direction: column; align-items: stretch; }
  .nav-links a { padding: 12px 12px; font-size: 1.02rem; }
  .nav-links a.is-active::after { display: none; }
  .nav-links a.is-active { background: rgba(74, 202, 168, .12); }
  .nav .btn { margin: 8px 0 0; }
}

/* ---------- hero ---------- */
.hero, .page-hero {
  position: relative; overflow: hidden; isolation: isolate;
  background:
    radial-gradient(760px 420px at 88% 0%, rgba(74, 202, 168, .20), transparent 62%),
    radial-gradient(640px 380px at 0% 100%, rgba(31, 159, 214, .15), transparent 62%),
    linear-gradient(165deg, var(--dark) 0%, var(--dark-2) 100%);
  color: var(--on-dark-muted);
}
.hero::before, .page-hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(rgba(163, 182, 195, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(163, 182, 195, .07) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: linear-gradient(180deg, #000 30%, transparent 100%);
  mask-image: linear-gradient(180deg, #000 30%, transparent 100%);
}
.hero h1, .page-hero h1 { color: #fff; }
.hero { padding: clamp(56px, 8vw, 104px) 0 clamp(64px, 9vw, 112px); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr); gap: clamp(32px, 6vw, 80px); align-items: center; }
.kicker {
  display: inline-flex; align-items: center; gap: 10px; margin: 0 0 18px;
  font: 600 .8rem/1 var(--font-display); letter-spacing: .16em; text-transform: uppercase; color: var(--accent);
}
.kicker .pulse { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px rgba(74, 202, 168, .2); }
.hero h1 { font-size: clamp(2.6rem, 6.4vw, 4.4rem); font-weight: 700; letter-spacing: -0.03em; line-height: 1; margin-bottom: 20px; }
.hero-lead { font: 500 clamp(1.25rem, 2.3vw, 1.6rem)/1.35 var(--font-display); color: var(--on-dark); letter-spacing: -0.01em; margin-bottom: 16px; max-width: 30ch; }
.hero-lead em { font-style: normal; color: var(--accent); }
.hero-sub { max-width: 58ch; color: var(--on-dark-muted); margin-bottom: 22px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 10px 22px; list-style: none; margin-bottom: 30px; font-size: .95rem; color: var(--on-dark); }
.hero-meta li { display: inline-flex; align-items: center; gap: 8px; }
.hero-meta .icon { color: var(--accent); }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.hero-actions .socials { display: flex; gap: 10px; margin-left: 4px; }
.hero-photo { position: relative; justify-self: end; width: min(100%, 380px); }
.hero-photo::before {
  content: ""; position: absolute; inset: 18px -18px -18px 18px; border-radius: 26px;
  border: 1.5px solid rgba(74, 202, 168, .5); background: rgba(74, 202, 168, .06);
}
.hero-photo img { position: relative; width: 100%; aspect-ratio: 4 / 5; object-fit: cover; border-radius: 24px; box-shadow: 0 30px 60px -20px rgba(0, 0, 0, .55); }
.hero-badge {
  position: absolute; left: -22px; bottom: 26px; display: flex; align-items: center; gap: 10px;
  padding: 10px 14px; border-radius: 14px; background: rgba(11, 26, 36, .92); border: 1px solid var(--dark-line);
  color: var(--on-dark); font-size: .86rem; line-height: 1.25; box-shadow: 0 12px 28px -12px rgba(0, 0, 0, .6);
}
.hero-badge .bi { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 9px; background: rgba(74, 202, 168, .16); color: var(--accent); }
.hero-badge .bi .icon { width: 20px; height: 20px; }
.hero-badge small { display: block; color: var(--on-dark-muted); font-size: .78rem; }
.hero { padding-bottom: calc(clamp(64px, 9vw, 112px) + 48px); }
.highlights-band { position: relative; z-index: 2; margin-top: -64px; }

@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-photo { order: -1; justify-self: start; width: 168px; }
  .hero-photo::before { inset: 10px -10px -10px 10px; border-radius: 22px; }
  .hero-photo img { border-radius: 20px; }
  .hero-badge { display: none; }
}

/* ---------- sections ---------- */
.section { padding: clamp(64px, 9vw, 112px) 0; }
.section-soft { background: var(--bg-soft); border-block: 1px solid var(--line); }
.section-head { max-width: 720px; margin-bottom: clamp(32px, 5vw, 52px); }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; margin: 0 0 12px; font: 600 .78rem/1 var(--font-display); letter-spacing: .16em; text-transform: uppercase; color: var(--accent-strong); }
.eyebrow::before { content: ""; width: 22px; height: 2px; border-radius: 2px; background: var(--accent); }
.section-head h2 { font-size: clamp(1.8rem, 3.6vw, 2.5rem); margin-bottom: 14px; }
.section-head p { color: var(--muted); font-size: 1.06rem; margin: 0; }
.subhead { font-size: 1.25rem; margin: 0 0 18px; }

/* ---------- highlights ---------- */
.highlights { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.hl {
  position: relative; padding: 24px 22px; border-radius: var(--radius-lg);
  background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-sm);
}
.hl-icon { display: grid; place-items: center; width: 44px; height: 44px; margin-bottom: 16px; border-radius: 12px; background: var(--accent-soft); color: var(--accent-strong); }
.hl-icon .icon { width: 22px; height: 22px; }
.hl h3 { font-size: 1.08rem; margin-bottom: 8px; }
.hl p { margin: 0; color: var(--muted); font-size: .95rem; line-height: 1.55; }
@media (max-width: 1000px) { .highlights { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .highlights { grid-template-columns: 1fr; } }

/* ---------- about ---------- */
.about-grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, .85fr); gap: clamp(28px, 5vw, 64px); align-items: start; }
.about-text p { font-size: 1.08rem; }
.about-text p:first-child::first-line { color: var(--ink); }
.about-text .aside { color: var(--muted); font-size: 1rem; border-left: 3px solid var(--accent); padding-left: 16px; margin-top: 24px; }
.glance { padding: 26px; border-radius: var(--radius-lg); background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow); }
.glance h3 { font-size: 1.05rem; margin-bottom: 16px; }
.glance dl { margin: 0; display: grid; gap: 14px; }
.glance dl div { display: grid; grid-template-columns: 26px 1fr; gap: 10px; align-items: start; }
.glance dt { grid-row: span 2; color: var(--accent-strong); padding-top: 2px; }
.glance dt .icon { width: 20px; height: 20px; }
.glance .label { font-size: .76rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); line-height: 1.3; }
.glance dd { margin: 0; color: var(--ink); font-size: .97rem; line-height: 1.45; }
@media (max-width: 860px) { .about-grid { grid-template-columns: 1fr; } }

/* ---------- timeline ---------- */
.timeline { list-style: none; position: relative; display: grid; gap: 18px; }
.tl-item {
  display: grid; grid-template-columns: 56px minmax(0, 1fr); gap: 20px;
  padding: 24px; border-radius: var(--radius-lg); background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-sm);
}
.tl-logo { width: 56px; height: 56px; border-radius: 14px; background: #fff; border: 1px solid var(--line); padding: 5px; object-fit: contain; }
.tl-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 4px 16px; margin-bottom: 4px; }
.tl-head h3 { font-size: 1.18rem; }
.tl-date { font: 600 .86rem/1.4 var(--font-sans); color: var(--accent-strong); white-space: nowrap; }
.tl-org { margin: 0 0 12px; color: var(--muted); font-size: .97rem; }
.tl-item ul { list-style: none; display: grid; gap: 8px; max-width: 82ch; }
.tl-item li { position: relative; padding-left: 20px; font-size: .99rem; line-height: 1.55; }
.tl-item li::before { content: ""; position: absolute; left: 3px; top: .62em; width: 7px; height: 7px; border-radius: 2px; background: var(--accent); transform: rotate(45deg); }
.tl-more { display: inline-flex; align-items: center; gap: 6px; margin-top: 14px; font-weight: 600; font-size: .95rem; text-decoration: none; }
.tl-more:hover { text-decoration: underline; }
.tl-more .icon { width: 16px; height: 16px; }
@media (max-width: 560px) {
  .tl-item { grid-template-columns: 1fr; gap: 12px; padding: 20px; }
  .tl-logo { width: 48px; height: 48px; }
}

/* ---------- project cards ---------- */
.tag-list { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; }
.tag { display: inline-block; padding: 4px 9px; border-radius: 7px; background: var(--surface-2); border: 1px solid var(--line); color: var(--ink-2); font-size: .8rem; font-weight: 500; line-height: 1.3; }

.card {
  position: relative; display: flex; flex-direction: column; overflow: hidden;
  border-radius: var(--radius-lg); background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-sm);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--line-strong); }
.card-media { position: relative; aspect-ratio: 16 / 9; overflow: hidden; background: var(--surface-2); border-bottom: 1px solid var(--line); }
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.card:hover .card-media img { transform: scale(1.025); }
.card-body { display: flex; flex-direction: column; flex: 1; padding: 22px 22px 20px; }
.card-meta { margin: 0 0 8px; font-size: .86rem; font-weight: 600; color: var(--accent-strong); }
.card h3 { font-size: 1.2rem; margin-bottom: 10px; }
.card h3 a { color: inherit; text-decoration: none; }
.card h3 a::after { content: ""; position: absolute; inset: 0; z-index: 1; }   /* whole card clickable */
.card p { color: var(--muted); font-size: .97rem; line-height: 1.55; }
.card .tag-list { margin-top: auto; padding-top: 6px; }
.card-links { position: relative; z-index: 2; display: flex; flex-wrap: wrap; gap: 6px 16px; margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--line); }
.card-links a { display: inline-flex; align-items: center; gap: 6px; font-size: .9rem; font-weight: 600; text-decoration: none; }
.card-links a:hover { text-decoration: underline; }
.card-links .icon { width: 16px; height: 16px; }

.card-feature { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); margin-bottom: 24px; }
.card-feature .card-media { aspect-ratio: auto; display: flex; align-items: center; background: #0b1a24; border-bottom: 0; border-right: 1px solid var(--line); }
.card-feature .card-media img { height: auto; object-fit: contain; }
.card-feature .card-body { padding: clamp(24px, 3vw, 36px); }
.card-feature h3 { font-size: clamp(1.35rem, 2.2vw, 1.65rem); }
.card-feature p { font-size: 1.01rem; }
.badge { display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px; border-radius: 999px; background: var(--accent-soft); color: var(--accent-strong); font-size: .78rem; font-weight: 700; letter-spacing: .02em; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(118px, 1fr)); gap: 10px; margin: 2px 0 18px; list-style: none; }
.stats li { padding: 8px 12px; border-radius: 10px; background: var(--surface-2); border: 1px solid var(--line); font-size: .85rem; color: var(--muted); line-height: 1.3; }
.stats strong { display: block; font: 700 1.05rem/1.2 var(--font-display); color: var(--ink); }

.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
@media (max-width: 1040px) { .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 860px) {
  .card-feature { grid-template-columns: 1fr; }
  .card-feature .card-media { aspect-ratio: 16 / 9; border-right: 0; border-bottom: 1px solid var(--line); }
}
@media (max-width: 640px) { .cards { grid-template-columns: 1fr; } }

.more-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin: clamp(48px, 7vw, 72px) 0 20px; }
.more-head h3 { font-size: 1.3rem; }
.more-head p { margin: 0; color: var(--muted); font-size: .95rem; }
.mini-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; list-style: none; }
.mini {
  position: relative; display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: 14px; align-items: center;
  padding: 10px; border-radius: 16px; background: var(--surface); border: 1px solid var(--line);
  transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease;
}
.mini:hover { border-color: var(--line-strong); transform: translateY(-2px); box-shadow: var(--shadow); }
.mini img { width: 96px; height: 72px; object-fit: cover; border-radius: 10px; border: 1px solid var(--line); }
.mini h4 { font-size: 1rem; margin-bottom: 3px; line-height: 1.25; }
.mini h4 a { color: inherit; text-decoration: none; }
.mini h4 a::after { content: ""; position: absolute; inset: 0; }
.mini p { margin: 0; font-size: .86rem; color: var(--muted); line-height: 1.4; }
@media (max-width: 1040px) { .mini-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .mini-grid { grid-template-columns: 1fr; } }

/* ---------- skills ---------- */
.legend { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 10px; margin: -18px 0 28px; list-style: none; font-size: .9rem; color: var(--muted); }
.legend .legend-label { font-weight: 600; margin-right: 4px; }
.legend li { display: inline-flex; align-items: center; gap: 8px; }
.skills-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.skill-group { padding: 24px; border-radius: var(--radius-lg); background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-sm); }
.skill-group h3 { display: flex; align-items: center; gap: 10px; font-size: 1.06rem; margin-bottom: 16px; }
.skill-group h3 .icon { color: var(--accent-strong); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; }
.chip { display: inline-flex; align-items: center; padding: 6px 11px; border-radius: 9px; font-size: .88rem; font-weight: 500; line-height: 1.3; border: 1.5px solid var(--line-strong); color: var(--ink); background: var(--surface); }
.chip.lv-3 { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 650; }
.chip.lv-1 { border-style: dashed; color: var(--muted); }
.legend .chip { padding: 2px 9px; font-size: .8rem; }
.languages { display: grid; gap: 10px; list-style: none; }
.languages li { display: flex; justify-content: space-between; gap: 12px; padding-bottom: 10px; border-bottom: 1px solid var(--line); font-size: .97rem; }
.languages li:last-child { border-bottom: 0; padding-bottom: 0; }
.languages span { color: var(--muted); }
@media (max-width: 1000px) { .skills-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .skills-grid { grid-template-columns: 1fr; } }

/* ---------- education ---------- */
.edu-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.edu { display: flex; flex-direction: column; padding: 24px; border-radius: var(--radius-lg); background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-sm); }
.edu-logo { width: 56px; height: 56px; border-radius: 14px; background: #fff; border: 1px solid var(--line); padding: 5px; object-fit: contain; margin-bottom: 18px; }
.edu .tl-date { display: block; margin-bottom: 6px; }
.edu h3 { font-size: 1.12rem; margin-bottom: 4px; }
.edu .org { color: var(--muted); font-size: .95rem; margin-bottom: 12px; }
.edu p:last-child { margin: 0; font-size: .95rem; }
.courses { margin-top: 36px; padding: 24px; border-radius: var(--radius-lg); background: var(--surface); border: 1px solid var(--line); }
.courses h3 { font-size: 1.06rem; margin-bottom: 14px; }
.courses ul { list-style: none; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px 28px; }
.courses li { display: grid; grid-template-columns: 82px 1fr; gap: 12px; font-size: .95rem; line-height: 1.45; }
.courses .yr { color: var(--accent-strong); font-weight: 600; font-size: .88rem; padding-top: 1px; }
.courses span.sub { display: block; color: var(--muted); font-size: .88rem; }
@media (max-width: 1000px) { .edu-grid { grid-template-columns: 1fr; } .courses ul { grid-template-columns: 1fr; } }

/* ---------- contact ---------- */
.contact-panel {
  position: relative; overflow: hidden; isolation: isolate;
  display: grid; grid-template-columns: minmax(0, 1.2fr) auto; gap: 28px; align-items: center;
  padding: clamp(28px, 5vw, 52px); border-radius: 26px;
  background:
    radial-gradient(520px 300px at 100% 0%, rgba(74, 202, 168, .22), transparent 62%),
    linear-gradient(160deg, var(--dark) 0%, var(--dark-2) 100%);
  color: var(--on-dark-muted);
}
.contact-panel h2 { color: #fff; font-size: clamp(1.7rem, 3.4vw, 2.4rem); margin-bottom: 12px; }
.contact-panel p { margin: 0; max-width: 54ch; }
.contact-panel a.mail { color: var(--accent); font-weight: 600; }
.contact-actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: flex-end; }
@media (max-width: 860px) { .contact-panel { grid-template-columns: 1fr; } .contact-actions { justify-content: flex-start; } }

/* ---------- footer ---------- */
.site-footer { padding: 32px 0 40px; border-top: 1px solid var(--line); font-size: .92rem; color: var(--muted); }
.footer-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px 24px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 6px 18px; list-style: none; }
.footer-links a { color: var(--muted); text-decoration: none; }
.footer-links a:hover { color: var(--accent-strong); text-decoration: underline; }

/* ==========================================================================
   Project pages
   ========================================================================== */
.page-hero { padding: clamp(36px, 6vw, 64px) 0 clamp(40px, 6vw, 64px); }
.breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 0 0 22px; list-style: none; font-size: .9rem; }
.breadcrumb a { color: var(--on-dark-muted); text-decoration: none; display: inline-flex; align-items: center; gap: 6px; }
.breadcrumb a:hover { color: #fff; text-decoration: underline; }
.breadcrumb li + li::before { content: "/"; margin-right: 8px; color: rgba(163, 182, 195, .5); }
.breadcrumb [aria-current] { color: var(--on-dark); }
.page-hero h1 { font-size: clamp(2rem, 4.6vw, 3.1rem); font-weight: 700; letter-spacing: -0.025em; max-width: 22ch; margin-bottom: 14px; }
.page-hero .lede { max-width: 64ch; font-size: clamp(1.05rem, 1.6vw, 1.2rem); color: var(--on-dark); opacity: .9; margin-bottom: 26px; }
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; list-style: none; margin-bottom: 28px; max-width: 980px; }
@media (max-width: 640px) { .facts { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 8px; } .facts li { padding: 10px 12px; font-size: .88rem; } }
.facts li { padding: 12px 14px; border-radius: 12px; background: rgba(255, 255, 255, .04); border: 1px solid var(--dark-line); font-size: .92rem; color: var(--on-dark); line-height: 1.4; }
.facts span { display: block; margin-bottom: 4px; font-size: .72rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--on-dark-muted); }
.link-row { display: flex; flex-wrap: wrap; gap: 10px; }

.page-body { padding: clamp(44px, 7vw, 80px) 0 clamp(56px, 8vw, 96px); }
.prose { max-width: 760px; margin-inline: auto; }
.prose > * + * { margin-top: 1.1em; }
.prose h2 { font-size: clamp(1.45rem, 2.6vw, 1.85rem); margin-top: 2.2em; padding-top: .2em; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: 1.2rem; margin-top: 1.8em; }
.prose p, .prose li { font-size: 1.05rem; }
.prose ul, .prose ol { padding-left: 0; list-style: none; display: grid; gap: 10px; }
.prose ul li { position: relative; padding-left: 22px; }
.prose ul li::before { content: ""; position: absolute; left: 4px; top: .66em; width: 7px; height: 7px; border-radius: 2px; background: var(--accent); transform: rotate(45deg); }
.prose ol { counter-reset: step; }
.prose ol li { position: relative; padding-left: 38px; counter-increment: step; }
.prose ol li::before { content: counter(step); position: absolute; left: 0; top: .1em; width: 26px; height: 26px; border-radius: 8px; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent-strong); font: 700 .85rem/1 var(--font-display); }
.prose code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .9em; padding: .12em .4em; border-radius: 6px; background: var(--surface-2); border: 1px solid var(--line); color: var(--ink); }
.prose .note { padding: 14px 18px; border-radius: 12px; background: var(--surface-2); border: 1px solid var(--line); color: var(--muted); font-size: .97rem; }
.prose ul.tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: .8em; }
.prose ul.tag-list li.tag { padding: 5px 10px; font-size: .86rem; }
.prose ul.tag-list li::before { display: none; }

.figure { margin: 2em 0; }
.prose > .figure { margin-top: 2em; }
.figure.wide { width: min(1040px, calc(100vw - 2 * var(--gutter))); position: relative; left: 50%; transform: translateX(-50%); }
.figure.narrow { max-width: 460px; margin-inline: auto; }
.figure a.zoom, .figure > img, .figure > video { display: block; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); background: var(--surface-2); }
.figure a.zoom { cursor: zoom-in; position: relative; }
.figure a.zoom img { width: 100%; transition: transform .35s ease; }
.figure a.zoom:hover img { transform: scale(1.01); }
.figure a.zoom::after {
  content: ""; position: absolute; right: 10px; bottom: 10px; width: 34px; height: 34px; border-radius: 9px;
  background: rgba(11, 26, 36, .78) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ffffff' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M15 3h6v6M9 21H3v-6M21 3l-7 7M3 21l7-7'/%3E%3C/svg%3E") center / 18px no-repeat;
  opacity: 0; transition: opacity .2s ease;
}
.figure a.zoom:hover::after, .figure a.zoom:focus-visible::after { opacity: 1; }
@media (hover: none) { .figure a.zoom::after { opacity: .85; } }
.figure.diagram a.zoom { background: #fff; padding: clamp(8px, 2vw, 18px); }
.figure figcaption { margin-top: 10px; font-size: .9rem; color: var(--muted); line-height: 1.5; text-align: center; }
.gallery { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin: 2em 0; }
.gallery.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.gallery .figure { margin: 0; }
.gallery .figure a.zoom { aspect-ratio: 4 / 3; }
.gallery .figure a.zoom img { height: 100%; object-fit: cover; }
.gallery.contain .figure a.zoom img { object-fit: contain; background: #fff; }
@media (max-width: 640px) { .gallery, .gallery.three { grid-template-columns: 1fr; } }

.video { margin: 2em 0; }
.video video { width: 100%; max-height: 74vh; border-radius: var(--radius); background: #000; border: 1px solid var(--line); }
.video.portrait video { width: auto; max-width: 100%; max-height: 72vh; margin-inline: auto; }
.video figcaption { margin-top: 10px; font-size: .9rem; color: var(--muted); text-align: center; }
.video-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin: 2em 0; }
.video-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.video-grid .video { margin: 0; }
.video-grid .video video { max-height: 60vh; }
@media (max-width: 640px) { .video-grid, .video-grid.three { grid-template-columns: 1fr; } }

/* click-to-load embeds (YouTube / Google Drive): nothing loads until the visitor presses play */
.embed { position: relative; aspect-ratio: 16 / 9; border-radius: var(--radius); overflow: hidden; background: var(--dark); border: 1px solid var(--line); }
.embed iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.embed-btn {
  position: absolute; inset: 0; width: 100%; height: 100%; padding: 0; border: 0; cursor: pointer;
  display: grid; place-items: center; background: var(--dark) center / cover no-repeat; color: #fff; font: inherit;
}
.embed-btn img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .9; transition: opacity .2s ease, transform .4s ease; }
.embed-btn::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(8, 18, 26, .05) 40%, rgba(8, 18, 26, .7) 100%); }
.embed-btn:hover img { opacity: 1; transform: scale(1.02); }
.embed-play {
  position: relative; z-index: 1; display: grid; place-items: center; width: 68px; height: 68px; border-radius: 50%;
  background: var(--accent); color: var(--accent-ink); box-shadow: 0 10px 30px -8px rgba(0, 0, 0, .6); transition: transform .2s ease;
}
.embed-btn:hover .embed-play, .embed-btn:focus-visible .embed-play { transform: scale(1.08); }
.embed-play .icon { width: 26px; height: 26px; margin-left: 4px; }
.embed-label { position: absolute; z-index: 1; left: 16px; right: 16px; bottom: 12px; text-align: left; font-size: .88rem; font-weight: 600; color: #fff; text-shadow: 0 1px 8px rgba(0, 0, 0, .6); }
.embed-label small { display: block; font-weight: 500; opacity: .8; font-size: .78rem; }
.embed-btn.no-image { background: linear-gradient(160deg, #0f2733, #0b1a24); }
.embed-note { margin-top: 8px; font-size: .84rem; color: var(--muted); text-align: center; }
.embed-note a { color: inherit; }

.stat-tiles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; list-style: none; }
.prose .stat-tiles { padding: 0; }
.stat-tiles li { padding: 18px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-sm); font-size: .92rem; color: var(--muted); line-height: 1.4; }
.prose .stat-tiles li { padding-left: 18px; font-size: .92rem; }
.prose .stat-tiles li::before { display: none; }
.stat-tiles strong { display: block; margin-bottom: 4px; font: 700 1.7rem/1.1 var(--font-display); color: var(--accent-strong); letter-spacing: -0.02em; }
@media (max-width: 640px) { .stat-tiles { grid-template-columns: 1fr; } }

.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; max-width: 760px; margin: clamp(48px, 7vw, 72px) auto 0; }
.pager a { display: flex; flex-direction: column; gap: 4px; padding: 16px 18px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--surface); text-decoration: none; transition: border-color .2s ease, transform .2s ease; }
.pager a:hover { border-color: var(--accent); transform: translateY(-2px); }
.pager small { color: var(--muted); font-size: .8rem; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; display: inline-flex; align-items: center; gap: 6px; }
.pager span { color: var(--ink); font-weight: 600; line-height: 1.35; }
.pager .next { text-align: right; align-items: flex-end; }
.pager .all { grid-column: 1 / -1; text-align: center; align-items: center; }
@media (max-width: 560px) { .pager { grid-template-columns: 1fr; } .pager .next { text-align: left; align-items: flex-start; } }

.mini-cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.mini-cards .card-media { aspect-ratio: 4 / 3; }
.mini-cards .card-media img { object-fit: contain; background: #fff; padding: 8px; }
@media (max-width: 640px) { .mini-cards { grid-template-columns: 1fr; } }
/* cards inside an article keep the card type scale, not the article's */
.prose .card h3 { margin-top: 0; }
.prose .card p { font-size: .97rem; }
.prose .card .card-meta { font-size: .86rem; }

/* ---------- lightbox ---------- */
.lightbox {
  position: fixed; inset: 0; z-index: 200; display: none; align-items: center; justify-content: center;
  padding: 56px 16px 72px; background: rgba(5, 12, 18, .9);
}
.lightbox.is-open { display: flex; }
.lightbox figure { margin: 0; max-width: min(1400px, 100%); max-height: 100%; display: flex; flex-direction: column; align-items: center; }
.lightbox img { max-width: 100%; max-height: calc(100vh - 150px); width: auto; height: auto; border-radius: 10px; background: #fff; box-shadow: 0 20px 60px rgba(0, 0, 0, .5); }
.lightbox figcaption { margin-top: 12px; color: #dbe5ec; font-size: .92rem; text-align: center; max-width: 80ch; }
.lb-btn {
  position: absolute; display: grid; place-items: center; width: 46px; height: 46px; border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, .2); background: rgba(255, 255, 255, .08); color: #fff; cursor: pointer;
}
.lb-btn:hover { background: rgba(255, 255, 255, .18); }
.lb-btn .icon { width: 22px; height: 22px; }
.lb-close { top: 14px; right: 14px; }
.lb-prev { left: 14px; top: 50%; transform: translateY(-50%); }
.lb-next { right: 14px; top: 50%; transform: translateY(-50%); }
.lightbox.single .lb-prev, .lightbox.single .lb-next { display: none; }
@media (max-width: 640px) { .lb-prev, .lb-next { top: auto; bottom: 14px; transform: none; } }

/* ---------- 404 ---------- */
.notfound { min-height: 60vh; display: grid; place-items: center; text-align: center; }
.notfound h1 { font-size: clamp(3rem, 10vw, 6rem); color: var(--accent-strong); }

/* ---------- motion & print ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}
@media print {
  .site-header, .nav-toggle, .hero-actions, .contact-actions, .pager, .lightbox { display: none !important; }
  .hero, .page-hero, .contact-panel { background: none !important; color: #000 !important; }
  .hero h1, .page-hero h1, .contact-panel h2 { color: #000 !important; }
  .card, .tl-item, .skill-group, .edu { box-shadow: none !important; break-inside: avoid; }
}