/* ============================================================
   Yahya Alariny — styles.css
   Light / dark adaptive • Inter font • readable sizes
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ---- Dark mode (default) ---- */
:root {
  color-scheme: dark;
  --bg:         #0b0b0c;
  --panel:      #111114;
  --line:       #29292d;
  --line-soft:  #1c1c20;
  --text:       #f0f0eb;
  --muted:      #9a9aa0;
  --quiet:      #5e5e66;
  --accent:     #d4ff4f;
  --accent-dim: #b8e030;
  --accent-ink: #0f1008;
  --topbar-bg:  rgba(11,11,12,.92);
  --card-bg:    rgba(255,255,255,.03);
  --grid-line:  rgba(255,255,255,.018);
  --gutter:     clamp(20px, 5vw, 72px);
  --content:    1320px;
  --mono:       ui-monospace, "SFMono-Regular", Menlo, Monaco, Consolas, monospace;
  --sans:       "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

/* ---- Light mode ---- */
@media (prefers-color-scheme: light) {
  :root {
    color-scheme: light;
    --bg:         #f5f5f0;
    --panel:      #ebebe6;
    --line:       #d0d0cb;
    --line-soft:  #e0e0db;
    --text:       #111112;
    --muted:      #52525a;
    --quiet:      #8a8a92;
    --accent:     #5a8f00;      /* dark olive-green — readable on light bg */
    --accent-dim: #4a7800;
    --accent-ink: #ffffff;
    --topbar-bg:  rgba(245,245,240,.93);
    --card-bg:    rgba(0,0,0,.03);
    --grid-line:  rgba(0,0,0,.05);
  }
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  padding: 0 0 40px;
  overflow-x: hidden;
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 72px 72px;
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
::selection { color: var(--accent-ink); background: var(--accent); }

.shell { width: min(100%, var(--content)); margin-inline: auto; padding-inline: var(--gutter); }

.mono {
  color: var(--muted);
  font: 11px/1.6 var(--mono);
  letter-spacing: .11em;
  text-transform: uppercase;
}

.progress {
  position: fixed; z-index: 20;
  inset: 0 auto auto 0;
  width: 100%; height: 2.5px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
}

/* ============================================================
   TOPBAR
   ============================================================ */
.topbar {
  position: sticky; z-index: 10; top: 0;
  display: flex; min-height: 64px;
  align-items: center; justify-content: space-between; gap: 28px;
  padding: 12px var(--gutter);
  border-bottom: 1px solid transparent;
  transition: background .25s ease, border-color .25s ease;
}
.topbar.stuck {
  border-color: var(--line);
  background: var(--topbar-bg);
  backdrop-filter: blur(14px);
}

.brand {
  flex: 0 0 auto;
  display: flex; align-items: center; gap: 10px;
  font: 600 12px/1 var(--sans);
  letter-spacing: .06em;
  text-transform: uppercase;
  white-space: nowrap;
}
.brand-mark {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}
.brand-logo {
  width: 26px;
  height: 26px;
  border-radius: 6px;
  object-fit: cover;
  flex-shrink: 0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.nav { display: flex; gap: 24px; overflow-x: auto; scrollbar-width: none; }
.nav::-webkit-scrollbar { display: none; }
.nav a {
  flex: 0 0 auto;
  padding: 5px 0;
  color: var(--muted);
  font: 500 11px/1 var(--sans);
  letter-spacing: .05em;
  text-transform: uppercase;
  transition: color .2s ease;
}
.nav a:hover, .nav a.active { color: var(--text); }
.nav .idx { margin-right: 5px; color: var(--quiet); font-size: 10px; }

/* ============================================================
   HERO
   ============================================================ */
section { scroll-margin-top: 84px; }

.hero { padding-top: 96px; padding-bottom: 72px; }

.hero-meta {
  display: flex; flex-wrap: wrap; gap: 16px 36px;
  margin-bottom: 36px;
}
.hero-meta div { display: grid; gap: 5px; }
.hero-meta .mono { font-size: 10px; }
.hero-meta .value {
  color: var(--text);
  font: 500 12px/1.5 var(--sans);
  letter-spacing: .03em;
}

h1 {
  max-width: 1000px; margin: 0;
  font-size: clamp(64px, 10vw, 116px);
  font-weight: 700;
  line-height: .88;
  letter-spacing: -.055em;
  text-transform: uppercase;
}
h1 span { color: transparent; -webkit-text-stroke: 1.5px var(--muted); }

.hero-role {
  margin: 30px 0 0;
  color: var(--accent);
  font: 600 11px/1 var(--sans);
  letter-spacing: .16em;
  text-transform: uppercase;
}

.hero-copy {
  max-width: 640px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.65;
}
.hero-copy strong { color: var(--text); font-weight: 600; }

.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center; gap: 10px;
  padding: 11px 18px;
  border: 1px solid var(--line);
  font: 600 11px/1 var(--sans);
  letter-spacing: .07em;
  text-transform: uppercase;
  transition: transform .2s ease, border-color .2s ease, background .2s ease, color .2s ease;
  border-radius: 2px;
}
.button:hover { transform: translateY(-2px); border-color: var(--text); }
.button.primary { border-color: var(--accent); background: var(--accent); color: var(--accent-ink); }
.button.primary:hover { background: var(--accent-dim); border-color: var(--accent-dim); }

/* ============================================================
   TICKER
   ============================================================ */
.ticker {
  overflow: hidden;
  border-block: 1px solid var(--line);
  padding: 14px 0;
  background: var(--card-bg);
}
.ticker-track { display: flex; width: max-content; gap: 36px; animation: drift 40s linear infinite; }
.ticker span {
  display: inline-flex; align-items: center; gap: 36px;
  color: var(--muted);
  font: 500 10.5px/1 var(--sans);
  letter-spacing: .12em;
  text-transform: uppercase;
}
.ticker span::after { color: var(--accent); content: "/"; }
@keyframes drift { to { transform: translateX(-50%); } }

/* ============================================================
   SECTION LABEL
   ============================================================ */
.section-label {
  display: flex; align-items: center; gap: 14px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}
.section-label .number { color: var(--accent); font: 600 11px/1 var(--sans); letter-spacing: .05em; }
.section-label h2 {
  margin: 0;
  color: var(--muted);
  font: 600 11px/1 var(--sans);
  letter-spacing: .16em;
  text-transform: uppercase;
}
.section-label .rule { height: 1px; flex: 1; background: var(--line-soft); }
.section-label .aside { color: var(--quiet); font: 500 10px/1 var(--mono); letter-spacing: .1em; text-transform: uppercase; }

/* ============================================================
   PROJECTS
   ============================================================ */
.projects { padding: 28px 0 64px; }

.category-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.category {
  min-height: 200px; padding: 26px 24px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--card-bg);
  transition: background .25s ease;
}
.category:hover { background: var(--panel); }
.category .letter { color: var(--accent); font: 600 11px/1 var(--sans); letter-spacing: .08em; }
.category h3 { margin: 22px 0 10px; font-size: 19px; font-weight: 600; line-height: 1.25; letter-spacing: -.02em; }
.category p { max-width: 36ch; margin: 0; color: var(--muted); font-size: 14.5px; line-height: 1.6; }
.project-note {
  display: inline-block; margin: 16px 0 0;
  color: var(--quiet);
  font: 500 10px/1 var(--sans); letter-spacing: .07em;
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-underline-offset: 3px;
  text-transform: uppercase;
}
.project-note:hover { color: var(--accent); }

/* ============================================================
   PROFILE SUMMARY
   ============================================================ */
.summary { padding: 22px 0 64px; }
.summary-copy {
  max-width: 860px; margin: 0; padding: 14px 0 0;
  font-size: 21px; line-height: 1.55; letter-spacing: -.01em;
}
.summary-copy strong { color: var(--accent); font-weight: 600; }

/* ============================================================
   EXPERIENCE
   ============================================================ */
.experience { padding: 20px 0 64px; }

.job {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 36px; padding: 28px 0;
  border-bottom: 1px solid var(--line-soft);
}
.job:first-of-type { border-top: 1px solid var(--line); }
.job-date { color: var(--muted); font: 500 11px/1.8 var(--sans); text-transform: uppercase; letter-spacing: .04em; }
.job h3 { margin: 0; font-size: 20px; font-weight: 600; line-height: 1.25; letter-spacing: -.02em; }
.job-org { display: block; margin-top: 5px; color: var(--accent); font: 600 10.5px/1 var(--sans); letter-spacing: .08em; text-transform: uppercase; }
.job p { max-width: 660px; margin: 14px 0 0; color: var(--muted); font-size: 15px; line-height: 1.65; }

/* ============================================================
   EDUCATION & CERTIFICATIONS
   ============================================================ */
.credentials {
  display: grid; grid-template-columns: 1.2fr .8fr;
  gap: 60px; padding: 20px 0 64px;
}
.credential-list { border-top: 1px solid var(--line); }
.credential { padding: 22px 0; border-bottom: 1px solid var(--line-soft); }
.credential h3 { margin: 0; font-size: 16.5px; font-weight: 600; line-height: 1.3; }
.credential p { margin: 7px 0 0; color: var(--muted); font-size: 14px; }
.credential .mono { display: block; margin-top: 8px; color: var(--quiet); }

/* ============================================================
   SKILLS
   ============================================================ */
.skills { padding: 20px 0 64px; }
.skills-grid {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}
.skill-group { padding: 22px 24px 24px 0; border-bottom: 1px solid var(--line-soft); }
.skill-group:nth-child(odd) { margin-right: 24px; }
.skill-group h3 { margin: 0 0 10px; color: var(--accent); font: 600 10.5px/1 var(--sans); letter-spacing: .1em; text-transform: uppercase; }
.skill-group p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.6; }

/* ============================================================
   WRITING TEASER (section 06)
   ============================================================ */
.writing-teaser { padding: 20px 0 64px; }
.writing-intro {
  display: flex; flex-wrap: wrap; align-items: flex-start;
  gap: 24px 48px; padding: 14px 0 36px;
}
.writing-lead {
  max-width: 580px; margin: 0;
  color: var(--muted); font-size: 17px; line-height: 1.65;
  flex: 1 1 300px;
}
.writing-grid {
  display: grid; grid-template-columns: repeat(3, minmax(0,1fr));
  border-top: 1px solid var(--line); border-left: 1px solid var(--line);
}
.writing-card {
  display: flex; flex-direction: column; gap: 10px;
  padding: 26px 22px;
  border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
  background: var(--card-bg);
  transition: background .25s ease;
  text-decoration: none; color: inherit;
}
.writing-card:hover { background: var(--panel); }
.writing-card-lang { color: var(--accent); font: 600 10px/1 var(--sans); letter-spacing: .12em; text-transform: uppercase; }
.writing-card h3 { margin: 4px 0 0; font-size: 16px; font-weight: 600; line-height: 1.35; letter-spacing: -.01em; }
.writing-card p { margin: 0; color: var(--muted); font-size: 13.5px; line-height: 1.6; flex: 1; }
.writing-card-meta { margin-top: 12px; color: var(--quiet); font: 500 10px/1 var(--sans); letter-spacing: .07em; }
.rtl-title { direction: rtl; font-family: "Segoe UI", Tahoma, Arial, sans-serif; font-size: 15px; }
.rtl-text  { direction: rtl; font-family: "Segoe UI", Tahoma, Arial, sans-serif; }

/* ============================================================
   CONTACT / FOOTER
   ============================================================ */
.contact { padding: 54px 0 24px; border-top: 1px solid var(--line); }
.contact-intro { margin: 18px 0; color: var(--muted); font: 600 10.5px/1 var(--sans); letter-spacing: .12em; text-transform: uppercase; }
.contact-email {
  display: inline-block; max-width: 100%; overflow-wrap: anywhere;
  font-size: clamp(38px, 7vw, 72px);
  font-weight: 700; line-height: 1.05; letter-spacing: -.05em;
}
.contact-links { display: flex; flex-wrap: wrap; gap: 22px; margin-top: 36px; }
.contact-links a { color: var(--muted); font: 600 11px/1 var(--sans); letter-spacing: .08em; text-transform: uppercase; transition: color .2s ease; }
.contact-links a:hover { color: var(--accent); }

.footer {
  display: flex; justify-content: space-between; gap: 15px; flex-wrap: wrap;
  margin-top: 54px; padding-top: 18px;
  border-top: 1px solid var(--line-soft);
  color: var(--quiet);
  font: 500 10px/1.5 var(--sans);
  letter-spacing: .06em; text-transform: uppercase;
}
.footer #clock { color: var(--muted); }

/* ============================================================
   REVEAL ANIMATION
   ============================================================ */
.js .reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.visible { opacity: 1; transform: none; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  h1 { font-size: clamp(52px, 9vw, 84px); }
  .credentials { gap: 36px; }
}

@media (max-width: 680px) {
  .topbar { align-items: flex-start; flex-direction: column; gap: 8px; padding-block: 12px 10px; min-height: auto; }
  .nav { width: 100%; gap: 16px; }
  .hero { padding-top: 60px; padding-bottom: 48px; }
  .hero-meta { gap: 14px 20px; }
  h1 { font-size: clamp(44px, 12vw, 60px); }
  .hero-copy { font-size: 16.5px; }
  .section-label { gap: 10px; }
  .section-label .aside { display: none; }
  .category-grid { grid-template-columns: 1fr; }
  .category { min-height: 0; padding: 22px 20px; }
  .category h3 { margin-top: 14px; font-size: 17px; }
  .summary-copy { font-size: 18px; }
  .job { grid-template-columns: 1fr; gap: 8px; }
  .job h3 { font-size: 18px; }
  .credentials { grid-template-columns: 1fr; gap: 28px; }
  .skills-grid { grid-template-columns: 1fr; }
  .skill-group:nth-child(odd) { margin-right: 0; }
  .writing-grid { grid-template-columns: 1fr; }
  .writing-lead { font-size: 15.5px; }
  .footer { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .js .reveal { opacity: 1; transform: none; }
}

@media print {
  .topbar, .progress, .ticker, .actions { display: none; }
  body { padding: 0; background: white; color: black; }
  .muted, .hero-copy, .job p, .credential p, .skill-group p { color: #333; }
}