/* =========================================================
   Dr. Nasser F. BinDhim — personal bio site
   Theme: navy + gold · RTL/LTR aware · light/dark
   ========================================================= */
:root{
  --navy:#0b2545;
  --navy-2:#123159;
  --gold:#c8a24a;
  --gold-soft:#e2c47f;
  --ink:#16202e;
  --muted:#5d6b7f;
  --bg:#f6f7f9;
  --surface:#ffffff;
  --line:#e6e9ef;
  --shadow:0 10px 30px rgba(11,37,69,.08);
  --radius:18px;
  --maxw:1160px;
  --font-ar:'IBM Plex Sans Arabic', system-ui, sans-serif;
  --font-en:'Inter', system-ui, sans-serif;
}
html[data-theme="dark"]{
  --ink:#eef2f8;
  --muted:#9fb0c6;
  --bg:#0b1017;
  --surface:#121a26;
  --line:#22303f;
  --shadow:0 12px 34px rgba(0,0,0,.5);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-ar);
  background:var(--bg);
  color:var(--ink);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
body[data-lang="en"]{font-family:var(--font-en);line-height:1.7}

.container{max-width:var(--maxw);margin-inline:auto;padding-inline:24px}
.muted{color:var(--muted)}

/* ---------- Nav ---------- */
.nav{
  position:sticky;top:0;z-index:50;
  backdrop-filter:saturate(140%) blur(10px);
  background:color-mix(in srgb, var(--surface) 82%, transparent);
  border-bottom:1px solid var(--line);
}
.nav-inner{max-width:var(--maxw);margin-inline:auto;padding:12px 24px;display:flex;align-items:center;gap:18px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:700}
.brand-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:var(--navy);color:var(--gold);font-family:var(--font-en);font-weight:700;
  box-shadow:0 4px 14px rgba(11,37,69,.25);
}
.brand-text{font-size:1.02rem;letter-spacing:.2px}
.nav-links{display:flex;gap:20px;margin-inline-start:auto}
.nav-links a{
  color:var(--muted);text-decoration:none;font-size:.94rem;font-weight:500;
  padding:6px 2px;border-bottom:2px solid transparent;transition:color .2s,border-color .2s;
}
.nav-links a:hover{color:var(--ink);border-color:var(--gold)}
.nav-actions{display:flex;align-items:center;gap:8px;margin-inline-start:auto}
.nav-links + .nav-actions{margin-inline-start:0}
.icon-btn{
  height:38px;min-width:38px;padding:0 12px;border:1px solid var(--line);border-radius:10px;
  background:var(--surface);color:var(--ink);cursor:pointer;font-weight:600;font-size:.85rem;
  display:inline-flex;align-items:center;justify-content:center;gap:6px;transition:border-color .2s,transform .1s;
}
.icon-btn:hover{border-color:var(--gold)}
.icon-btn:active{transform:scale(.97)}
.menu-btn{display:none;flex-direction:column;gap:4px;padding:0 10px}
.menu-btn span{display:block;width:18px;height:2px;background:currentColor;border-radius:2px}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden}
.hero-bg{
  position:absolute;inset:0;
  background:
    radial-gradient(1100px 420px at 85% -10%, rgba(200,162,74,.18), transparent 60%),
    radial-gradient(900px 500px at -10% 20%, rgba(11,37,69,.10), transparent 55%);
  z-index:0;
}
html[data-theme="dark"] .hero-bg{
  background:
    radial-gradient(1100px 460px at 85% -10%, rgba(200,162,74,.16), transparent 60%),
    radial-gradient(900px 520px at -10% 20%, rgba(24,58,102,.5), transparent 55%);
}
.hero-inner{
  position:relative;z-index:1;max-width:var(--maxw);margin-inline:auto;
  padding:clamp(40px,7vw,90px) 24px clamp(24px,4vw,40px);
  display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;
}
.eyebrow{color:var(--gold);font-weight:600;letter-spacing:.06em;font-size:.82rem;text-transform:uppercase;margin:0 0 10px}
.hero h1{font-size:clamp(2rem,4.4vw,3.4rem);line-height:1.15;margin:0 0 12px;letter-spacing:-.5px}
.headline{font-size:clamp(1.02rem,1.7vw,1.3rem);font-weight:600;color:var(--navy-2);margin:0 0 16px}
html[data-theme="dark"] .headline{color:var(--gold-soft)}
.lede{font-size:1.05rem;color:var(--muted);max-width:56ch;margin:0 0 26px}
.cta-row{display:flex;gap:12px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:12px;text-decoration:none;font-weight:600;font-size:.95rem;
  border:1px solid transparent;transition:transform .12s,box-shadow .2s,background .2s;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--navy);color:#fff;box-shadow:var(--shadow)}
.btn-primary:hover{background:var(--navy-2)}
.btn-ghost{border-color:var(--line);color:var(--ink);background:var(--surface)}
.btn-ghost:hover{border-color:var(--gold)}

.hero-photo{display:flex;justify-content:center}
.photo-frame{
  position:relative;border-radius:24px;padding:10px;background:var(--surface);
  border:1px solid var(--line);box-shadow:var(--shadow);max-width:380px;width:100%;
}
.photo-frame::after{
  content:"";position:absolute;inset:10px;border-radius:16px;
  box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--gold) 40%, transparent);
  pointer-events:none;
}
.photo-frame img{display:block;width:100%;height:auto;border-radius:16px}

.metrics{
  position:relative;z-index:1;max-width:var(--maxw);margin:8px auto 0;padding:0 24px 44px;
  display:grid;grid-template-columns:repeat(4,1fr);gap:14px;
}
.metric{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:16px 18px;box-shadow:var(--shadow)}
.metric .m-val{font-size:1.5rem;font-weight:700;color:var(--navy-2);font-family:var(--font-en)}
html[data-theme="dark"] .metric .m-val{color:var(--gold-soft)}
.metric .m-lab{font-size:.85rem;color:var(--muted)}

/* ---------- Sections ---------- */
.section{padding:clamp(48px,7vw,88px) 0}
.section.alt{background:color-mix(in srgb, var(--navy) 4%, var(--bg))}
html[data-theme="dark"] .section.alt{background:#0e1420}
.section-head{margin-bottom:34px}
.section-head h2{font-size:clamp(1.6rem,3vw,2.2rem);margin:6px 0 0}
.kicker{color:var(--gold);font-weight:600;font-size:.85rem;letter-spacing:.04em;margin:0;text-transform:uppercase}
.two-col{display:grid;grid-template-columns:.7fr 1.3fr;gap:40px;align-items:start}
.col-side h2{font-size:clamp(1.6rem,3vw,2.2rem);margin:6px 0 0}
.col-main p{font-size:1.06rem;margin:0 0 16px}

/* ---------- Timeline ---------- */
.timeline{position:relative;display:grid;gap:18px}
.tl-item{
  display:grid;grid-template-columns:190px 1fr;gap:22px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 24px;box-shadow:var(--shadow);
}
.tl-when{color:var(--gold);font-weight:700;font-family:var(--font-en)}
.tl-role{font-weight:700;font-size:1.1rem;margin:0 0 2px}
.tl-org{color:var(--muted);font-weight:500;margin:0 0 12px}
.tl-points{margin:0;padding-inline-start:18px}
.tl-points li{margin:4px 0;color:var(--muted);font-size:.96rem}

/* ---------- Cards ---------- */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px 22px;box-shadow:var(--shadow);transition:transform .16s,border-color .2s;
}
.card:hover{transform:translateY(-3px);border-color:color-mix(in srgb,var(--gold) 45%,var(--line))}
.card h3{font-size:1.05rem;margin:0 0 6px}
.card p{margin:0;color:var(--muted);font-size:.94rem}
.card .tag{display:inline-block;font-size:.78rem;color:var(--gold);font-weight:600;margin-bottom:8px}
.books .card{border-top:3px solid var(--gold)}
.books .b-ar{font-size:1.1rem;font-weight:700}
.books .b-en{color:var(--muted);font-size:.9rem}
.books .b-meta{color:var(--muted);font-size:.85rem;margin-top:8px}

.books{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:20px}
.book-card{display:flex;flex-direction:column;padding:0;overflow:hidden;text-decoration:none;color:inherit}
.book-card .book-cover{background:linear-gradient(160deg,#eef1f6,#dfe4ec);display:flex;align-items:center;justify-content:center;padding:22px;min-height:250px}
html[data-theme="dark"] .book-card .book-cover{background:linear-gradient(160deg,#1a2433,#131b27)}
.book-card .book-cover img{max-height:230px;width:auto;max-width:100%;border-radius:6px;box-shadow:0 12px 26px rgba(11,37,69,.28);transition:transform .25s}
.book-card:hover .book-cover img{transform:translateY(-4px) scale(1.02)}
.book-card .book-info{padding:16px 18px 18px;display:flex;flex-direction:column;gap:6px}
.book-card .b-title{font-size:1.02rem;margin:0;line-height:1.5}
.book-card .b-sub{color:var(--muted);font-size:.82rem;margin:0}
.book-card .b-blurb{color:var(--muted);font-size:.9rem;margin:2px 0 4px}
.book-card .b-meta{color:var(--gold);font-size:.82rem;font-weight:600}
.book-card .b-link{margin-top:auto;color:var(--navy-2);font-weight:600;font-size:.86rem}
html[data-theme="dark"] .book-card .b-link{color:var(--gold-soft)}

/* ---------- Education ---------- */
.edu-list{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.edu-list li{
  display:grid;grid-template-columns:1fr auto;gap:16px;align-items:center;
  background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:16px 20px;box-shadow:var(--shadow);
}
.edu-list .e-name{font-weight:600}
.edu-list .e-org{color:var(--muted);font-size:.9rem}
.edu-list .e-year{color:var(--gold);font-weight:700;font-family:var(--font-en);white-space:nowrap}

/* ---------- Research ---------- */
.research-wrap{display:grid;grid-template-columns:.8fr 1.2fr;gap:34px;align-items:start}
.research-stats{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:18px;box-shadow:var(--shadow);text-align:center}
.stat .s-val{font-size:1.6rem;font-weight:700;color:var(--navy-2);font-family:var(--font-en)}
html[data-theme="dark"] .stat .s-val{color:var(--gold-soft)}
.stat .s-lab{font-size:.82rem;color:var(--muted)}
.research-body p{font-size:1.05rem}

/* ---------- Media ---------- */
.media-card{display:flex;flex-direction:column;padding:0;overflow:hidden;text-decoration:none;color:inherit}
.media-thumb{position:relative;background:#0b1017;aspect-ratio:16/9;overflow:hidden}
.media-thumb img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .3s}
.media-card:hover .media-thumb img{transform:scale(1.04)}
.media-thumb .play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center}
.media-thumb .play::before{content:"";width:54px;height:54px;border-radius:50%;background:rgba(11,37,69,.75);box-shadow:0 4px 16px rgba(0,0,0,.35);position:absolute}
.media-thumb .play b{position:relative;color:#fff;font-size:1rem;line-height:1;transform:translateX(2px)}
.media-info{padding:16px 18px 18px;display:flex;flex-direction:column;gap:6px}
.media-info h3{font-size:1rem;margin:0;line-height:1.5}
.media-info p{color:var(--muted);font-size:.9rem;margin:0}

/* ---------- Articles (3qool) ---------- */
.section-sub{color:var(--muted);margin:10px 0 0;max-width:60ch}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.articles-highlights{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin-bottom:26px}
.article-card.hl{border-top:3px solid var(--gold);text-decoration:none;color:inherit;display:flex;flex-direction:column;gap:8px}
.article-card.hl h3{font-size:1.02rem;line-height:1.6;margin:0}
.article-card.hl .b-link{margin-top:auto;color:var(--navy-2);font-weight:600;font-size:.88rem}
html[data-theme="dark"] .article-card.hl .b-link{color:var(--gold-soft)}
.articles-browse{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-bottom:16px}
.article-filter{
  flex:1 1 260px;min-width:200px;background:var(--surface);border:1px solid var(--line);
  border-radius:12px;padding:11px 15px;font:inherit;font-size:.98rem;color:var(--ink);
}
.article-filter:focus{outline:none;border-color:var(--gold);box-shadow:0 0 0 3px color-mix(in srgb,var(--gold) 22%,transparent)}
.articles-list{display:grid;gap:8px}
.article-row{
  display:grid;grid-template-columns:104px 1fr auto auto;gap:14px;align-items:center;
  text-decoration:none;color:inherit;background:var(--surface);border:1px solid var(--line);
  border-radius:12px;padding:13px 18px;transition:border-color .2s,transform .12s,box-shadow .2s;
}
.article-row:hover{border-color:color-mix(in srgb,var(--gold) 45%,var(--line));transform:translateY(-2px);box-shadow:var(--shadow)}
.article-row .a-date{color:var(--muted);font-size:.84rem;font-variant-numeric:tabular-nums}
.article-row .a-title{font-weight:600;font-size:1rem;line-height:1.6}
.article-row .a-star{color:var(--gold);font-size:1rem}
.article-row .a-go{color:var(--muted);font-size:.9rem}
.article-empty{padding:18px 4px}

/* ---------- Contact ---------- */
.contact{
  background:linear-gradient(160deg,var(--navy),var(--navy-2));color:#fff;
  position:relative;overflow:hidden;
}
.contact::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(760px 320px at 88% -20%, rgba(200,162,74,.20), transparent 62%);
}
html[data-theme="dark"] .contact{background:linear-gradient(160deg,#0d1a2c,#0b2545)}
.contact-inner{
  position:relative;z-index:1;
  display:grid;grid-template-columns:.85fr 1.15fr;gap:clamp(28px,4vw,56px);align-items:start;
}
.contact-aside .kicker{color:var(--gold-soft)}
.contact h2{font-size:clamp(1.7rem,3vw,2.3rem);margin:6px 0 10px}
.contact-lead{color:#cdd8e6;margin:0 0 22px;max-width:42ch}
.contact-links{display:flex;gap:12px;flex-wrap:wrap}
.contact-card{
  display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:#fff;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);border-radius:12px;
  padding:11px 16px;font-weight:600;font-size:.92rem;transition:background .2s,border-color .2s,transform .12s;
}
.contact-card:hover{background:rgba(255,255,255,.15);border-color:rgba(200,162,74,.55);transform:translateY(-2px)}
.contact-card .ci{display:grid;place-items:center;width:24px;height:24px;border-radius:7px;background:var(--gold);color:var(--navy);font-size:.82rem;font-weight:700;flex:none}

/* contact form */
.contact-form{
  background:rgba(255,255,255,.055);
  border:1px solid rgba(255,255,255,.14);
  border-radius:var(--radius);
  padding:clamp(22px,3vw,30px) clamp(20px,3vw,30px);
  display:flex;flex-direction:column;gap:18px;
  box-shadow:0 20px 50px rgba(4,12,24,.35);
  backdrop-filter:blur(4px);
}
.contact-form .cf-field{display:flex;flex-direction:column;gap:8px}
.contact-form label{font-size:.9rem;color:#dbe4f0;font-weight:600}
.contact-form input,
.contact-form textarea{
  width:100%;background:rgba(9,20,35,.55);
  border:1px solid rgba(255,255,255,.20);
  border-radius:12px;color:#fff;padding:13px 15px;
  font:inherit;font-size:1rem;line-height:1.6;
  transition:border-color .18s,background .18s,box-shadow .18s;
}
.contact-form textarea{resize:none;min-height:140px}
.contact-form input::placeholder,
.contact-form textarea::placeholder{color:#9db2cc}
.contact-form input:focus,
.contact-form textarea:focus{
  outline:none;border-color:var(--gold);background:rgba(9,20,35,.72);
  box-shadow:0 0 0 3px rgba(200,162,74,.22);
}
.contact-form .cf-hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0;pointer-events:none}

/* submit button — explicitly styled (never inherits a light-theme .btn) */
.contact-form .cf-submit{
  align-self:flex-start;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:13px 32px;border:0;border-radius:12px;cursor:pointer;
  background:var(--gold);
  color:var(--navy);font:inherit;font-size:1rem;font-weight:700;letter-spacing:.2px;
  box-shadow:0 6px 16px rgba(9,20,35,.35);
  transition:transform .12s,box-shadow .2s,filter .2s;
}
.contact-form .cf-submit:hover{filter:brightness(1.05);box-shadow:0 8px 20px rgba(9,20,35,.42)}
.contact-form .cf-submit:active{transform:translateY(1px)}
.contact-form .cf-submit:focus-visible{outline:3px solid rgba(226,196,127,.55);outline-offset:2px}
.contact-form .cf-submit:disabled{opacity:.6;cursor:progress}

.contact-form .cf-status{margin:0;font-size:.92rem;min-height:1.2em}
.contact-form .cf-status.ok{color:#9ff0c0}
.contact-form .cf-status.err{color:#ffc6c6}

/* ---------- Footer ---------- */
.footer{border-top:1px solid var(--line);padding:22px 0;background:var(--surface)}
.footer-inner{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:.88rem;color:var(--muted)}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}

/* ---------- Responsive ---------- */
@media (max-width:900px){
  .hero-inner{grid-template-columns:1fr;gap:32px}
  .hero-photo{order:-1}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .two-col{grid-template-columns:1fr;gap:16px}
  .research-wrap{grid-template-columns:1fr}
  .tl-item{grid-template-columns:1fr;gap:8px}
}
@media (max-width:720px){
  .nav-links{
    position:absolute;inset-inline:0;top:100%;background:var(--surface);
    border-bottom:1px solid var(--line);flex-direction:column;gap:0;padding:8px 24px 16px;
    display:none;box-shadow:var(--shadow);
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 0}
  .menu-btn{display:inline-flex}
}