/* ---------- Tokens ---------- */
:root {
  --bg: #060a14;
  --bg-alt: #0a1120;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-hover: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.09);
  --text: #eaf0fb;
  --text-dim: #94a3c4;
  --text-dimmer: #5c6a8c;
  --cyan: #22d3ee;
  --blue: #4f8cff;
  --violet: #8b6bff;
  --grad: linear-gradient(120deg, var(--cyan), var(--blue) 55%, var(--violet));
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 20px 60px -20px rgba(0, 0, 0, 0.6);
  --font: "Inter", "IBM Plex Sans Arabic", system-ui, sans-serif;
  --font-display: "Space Grotesk", "Inter", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

a { color: inherit; text-decoration: none; }

::selection { background: var(--cyan); color: #04121c; }

/* ---------- Background FX ---------- */
.bg-fx {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}
#network { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.55; }

.glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.35;
  animation: float 18s ease-in-out infinite;
}
.glow-1 { width: 480px; height: 480px; background: var(--blue); top: -120px; left: -100px; }
.glow-2 { width: 420px; height: 420px; background: var(--violet); top: 40%; right: -140px; animation-delay: -6s; }
.glow-3 { width: 380px; height: 380px; background: var(--cyan); bottom: -160px; left: 30%; animation-delay: -12s; }

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -40px) scale(1.08); }
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 50% 0%, black 0%, transparent 70%);
}

/* ---------- Progress bar ---------- */
#progress-bar {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: var(--grad);
  z-index: 999;
  transition: width 0.1s ease-out;
}

/* ---------- Nav ---------- */
.nav-wrap {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  backdrop-filter: blur(16px) saturate(140%);
  background: rgba(6, 10, 20, 0.55);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.nav {
  max-width: 1180px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}
.brand-icon { color: var(--cyan); }
.accent { color: var(--cyan); }

.nav-links {
  list-style: none;
  display: flex;
  gap: 28px;
  margin: 0;
  padding: 0;
  flex: 1;
  justify-content: center;
}
.nav-links a {
  font-size: 0.92rem;
  color: var(--text-dim);
  position: relative;
  padding: 6px 2px;
  transition: color 0.25s;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0%;
  height: 2px;
  background: var(--grad);
  transition: width 0.25s;
  border-radius: 2px;
}
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }

.nav-cta {
  border: 1px solid rgba(255,255,255,0.16);
  padding: 9px 18px;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 500;
  transition: all 0.25s;
  white-space: nowrap;
}
.nav-cta:hover { background: var(--surface-hover); border-color: var(--cyan); }

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 7px 12px;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-dimmer);
  transition: border-color 0.25s;
  flex-shrink: 0;
}
.lang-toggle:hover { border-color: var(--cyan); }
.lang-toggle .lang-sep { color: var(--text-dimmer); opacity: 0.5; }
.lang-toggle .lang-opt { transition: color 0.25s; }
.lang-toggle[data-lang="en"] .lang-en { color: var(--cyan); }
.lang-toggle[data-lang="ar"] .lang-ar { color: var(--cyan); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  z-index: 110;
}
.nav-toggle span {
  width: 24px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Sections ---------- */
main { position: relative; z-index: 1; }

.section { padding: 120px 0; }
.section.alt { background: linear-gradient(180deg, transparent, rgba(255,255,255,0.015) 15%, rgba(255,255,255,0.015) 85%, transparent); }

.section-tag {
  font-family: var(--font-display);
  color: var(--cyan);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.8rem;
  font-weight: 600;
  margin: 0 0 12px;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  margin: 0 0 56px;
  max-width: 640px;
  letter-spacing: -0.01em;
}
.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.sub-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  margin: 64px 0 28px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.25s, box-shadow 0.25s, background 0.25s, border-color 0.25s;
  cursor: pointer;
  border: 1px solid transparent;
}
.btn-sm { padding: 9px 18px; font-size: 0.85rem; }
.btn-primary {
  background: var(--grad);
  color: #04121c;
  box-shadow: 0 10px 30px -8px rgba(79, 140, 255, 0.55);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 36px -8px rgba(79, 140, 255, 0.7); }
.btn-ghost {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
}
.btn-ghost:hover { background: var(--surface-hover); border-color: var(--cyan); transform: translateY(-2px); }

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 90px;
  position: relative;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--cyan);
  border: 1px solid rgba(34, 211, 238, 0.3);
  background: rgba(34, 211, 238, 0.07);
  padding: 6px 14px;
  border-radius: 999px;
  margin: 0 0 24px;
}
.dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 0 rgba(34,211,238,0.6);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(34,211,238,0.6); }
  70% { box-shadow: 0 0 0 8px rgba(34,211,238,0); }
  100% { box-shadow: 0 0 0 0 rgba(34,211,238,0); }
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.08;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}
.hero-role {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.4vw, 1.6rem);
  font-weight: 500;
  color: var(--text-dim);
  margin: 0 0 24px;
  min-height: 1.6em;
}
.typed { color: var(--cyan); }
.cursor { color: var(--cyan); animation: blink 1s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }

.hero-desc {
  color: var(--text-dim);
  max-width: 540px;
  font-size: 1.02rem;
  margin: 0 0 34px;
}
.hero-actions { display: flex; gap: 16px; margin-bottom: 36px; flex-wrap: wrap; }
.hero-social { display: flex; gap: 12px; }
.social-btn {
  width: 42px; height: 42px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border);
  background: var(--surface);
  transition: all 0.25s;
}
.social-btn:hover { background: var(--grad); color: #04121c; transform: translateY(-3px); border-color: transparent; }

/* Hero visual - orbit */
.hero-visual { display: flex; align-items: center; justify-content: center; }
.orbit-wrap {
  position: relative;
  width: 380px; height: 380px;
  max-width: 90vw;
}
.orbit-core {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 120px; height: 120px;
  border-radius: 50%;
  background: var(--grad);
  display: flex; align-items: center; justify-content: center;
  font-size: 2.6rem;
  box-shadow: 0 0 60px rgba(79, 140, 255, 0.55), inset 0 0 30px rgba(255,255,255,0.25);
  animation: corepulse 4s ease-in-out infinite;
  z-index: 2;
}
@keyframes corepulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); }
  50% { transform: translate(-50%, -50%) scale(1.06); }
}
.orbit {
  position: absolute;
  top: 50%; left: 50%;
  border: 1px dashed rgba(255,255,255,0.14);
  border-radius: 50%;
  transform-origin: center;
}
.orbit .chip {
  position: absolute;
  background: var(--surface);
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  white-space: nowrap;
  color: var(--text);
  top: 50%;
  left: 100%;
  transform: translate(-50%, -50%);
}
.orbit-a { width: 380px; height: 380px; margin: -190px 0 0 -190px; animation: spin 22s linear infinite; }
.orbit-b { width: 300px; height: 300px; margin: -150px 0 0 -150px; animation: spin 16s linear infinite reverse; }
.orbit-c { width: 220px; height: 220px; margin: -110px 0 0 -110px; animation: spin 26s linear infinite; }
.orbit-d { width: 380px; height: 380px; margin: -190px 0 0 -190px; animation: spin 22s linear infinite; animation-delay: -11s; }
.orbit-e { width: 300px; height: 300px; margin: -150px 0 0 -150px; animation: spin 16s linear infinite reverse; animation-delay: -8s; }
.orbit-f { width: 220px; height: 220px; margin: -110px 0 0 -110px; animation: spin 26s linear infinite; animation-delay: -13s; }
.orbit .chip { animation: counterspin inherit; }
.orbit-a .chip, .orbit-d .chip { animation: counterspin 22s linear infinite; }
.orbit-b .chip, .orbit-e .chip { animation: counterspin 16s linear infinite reverse; }
.orbit-c .chip, .orbit-f .chip { animation: counterspin 26s linear infinite; }
.orbit-d .chip, .orbit-e .chip, .orbit-f .chip { animation-delay: inherit; }

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes counterspin { to { transform: translate(-50%, -50%) rotate(-360deg); } }

.scroll-cue {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  width: 26px; height: 42px;
  border: 2px solid var(--text-dimmer);
  border-radius: 20px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}
.scroll-cue span {
  width: 4px; height: 8px;
  background: var(--cyan);
  border-radius: 2px;
  animation: scrolldown 1.6s infinite;
}
@keyframes scrolldown {
  0% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(14px); }
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: start;
}
.about-copy p { color: var(--text-dim); font-size: 1.02rem; }
.about-facts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
}
.fact { display: flex; flex-direction: column; gap: 4px; }
.fact-num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.fact-label { color: var(--text-dimmer); font-size: 0.82rem; }

.about-card { display: flex; flex-direction: column; gap: 16px; }
.edu-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px;
  transition: transform 0.25s, border-color 0.25s;
}
.edu-card:hover { transform: translateY(-3px); border-color: rgba(34,211,238,0.35); }
.edu-icon { font-size: 1.6rem; }
.edu-card h3 { margin: 0 0 4px; font-size: 1rem; }
.edu-sub { margin: 0; color: var(--text-dim); font-size: 0.88rem; }
.edu-date { margin: 4px 0 0; color: var(--text-dimmer); font-size: 0.8rem; unicode-bidi: isolate; }

/* ---------- Timeline ---------- */
.timeline {
  position: relative;
  padding-left: 32px;
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 36px;
}
.tl-item { position: relative; }
.tl-dot {
  position: absolute;
  left: -37.5px;
  top: 6px;
  width: 13px; height: 13px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(34,211,238,0.12);
}
.tl-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 24px 28px;
  transition: transform 0.25s, border-color 0.25s, background 0.25s;
}
.tl-card:hover { transform: translateX(4px); border-color: rgba(34,211,238,0.3); background: var(--surface-hover); }
.tl-date {
  display: inline-block;
  unicode-bidi: isolate;
  font-size: 0.76rem;
  color: var(--cyan);
  background: rgba(34,211,238,0.08);
  border: 1px solid rgba(34,211,238,0.2);
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 10px;
}
.tl-card h3 { margin: 0 0 12px; font-size: 1.08rem; }
.tl-card h3 span { color: var(--text-dim); font-weight: 400; font-size: 0.92rem; }
.tl-card ul { margin: 0; padding-left: 18px; color: var(--text-dim); font-size: 0.92rem; display: flex; flex-direction: column; gap: 6px; }

.course-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.course-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 22px;
  transition: transform 0.25s, border-color 0.25s;
}
.course-card:hover { transform: translateY(-4px); border-color: rgba(139,107,255,0.35); }
.course-card h4 { margin: 0 0 6px; font-size: 1rem; }
.course-org { color: var(--cyan); font-size: 0.8rem; margin: 0 0 10px; }
.course-card p:last-child { margin: 0; color: var(--text-dim); font-size: 0.88rem; }

/* ---------- Skills ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.skill-cat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 30px;
}
.skill-cat h3 {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display);
  margin: 0 0 22px;
  font-size: 1.1rem;
}
.bar { margin-bottom: 18px; }
.bar:last-child { margin-bottom: 0; }
.bar-label { display: block; font-size: 0.86rem; color: var(--text-dim); margin-bottom: 8px; }
.bar-track {
  height: 7px;
  background: rgba(255,255,255,0.07);
  border-radius: 999px;
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: var(--grad);
  transition: width 1.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chips span {
  padding: 8px 16px;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-dim);
  transition: all 0.25s;
}
.chips span:hover { color: var(--text); border-color: var(--cyan); background: rgba(34,211,238,0.08); }

/* ---------- Certifications ---------- */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 24px;
}
.cert-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.cert-card:hover { transform: translateY(-6px); border-color: rgba(34,211,238,0.35); box-shadow: var(--shadow); }
.cert-img-wrap {
  position: relative;
  aspect-ratio: 4/3;
  background: #eef2f8;
  overflow: hidden;
}
.cert-img-wrap img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: top;
  transition: transform 0.4s;
}
.cert-card:hover .cert-img-wrap img { transform: scale(1.05); }
.cert-fallback {
  display: none;
  position: absolute; inset: 0;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: linear-gradient(135deg, rgba(79,140,255,0.18), rgba(139,107,255,0.18));
  color: var(--text-dim);
  text-align: center;
  padding: 16px;
}
.cert-card.img-missing .cert-img-wrap img { display: none; }
.cert-card.img-missing .cert-fallback { display: flex; }
.cert-fallback-static { display: flex; }
.cert-fallback-badge {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--grad);
  color: #04121c;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  font-family: var(--font-display);
}
.cert-fallback p { margin: 0; font-size: 0.78rem; }
.cert-info { padding: 18px 20px; }
.cert-info h3 { margin: 0 0 4px; font-size: 1rem; }
.cert-issuer { margin: 0; color: var(--cyan); font-size: 0.84rem; }
.cert-date { margin: 6px 0 0; color: var(--text-dimmer); font-size: 0.76rem; unicode-bidi: isolate; }

/* ---------- Projects ---------- */
.feature-project {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 40px;
}
.feature-project-media {
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
  aspect-ratio: 3/4;
  background: #eef2f8;
}
.feature-project-media img { width: 100%; height: 100%; object-fit: cover; object-position: top; }
.feature-fallback {
  display: none;
  position: absolute; inset: 0;
  flex-direction: column; align-items: center; justify-content: center;
  gap: 10px;
  background: linear-gradient(135deg, rgba(79,140,255,0.2), rgba(139,107,255,0.2));
  text-align: center;
  padding: 20px;
  font-size: 1.4rem;
}
.feature-fallback p { font-size: 0.8rem; color: var(--text-dim); margin: 0; }
.feature-project-media.img-missing img { display: none; }
.feature-project-media.img-missing .feature-fallback { display: flex; }

.proj-badge {
  display: inline-block;
  background: rgba(34,211,238,0.1);
  color: var(--cyan);
  border: 1px solid rgba(34,211,238,0.25);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 14px;
}
.proj-badge.subtle { background: rgba(255,255,255,0.06); color: var(--text-dim); border-color: var(--border); }
.feature-project-copy h3 { font-family: var(--font-display); font-size: 1.4rem; margin: 0 0 16px; line-height: 1.3; }
.feature-project-copy > p { color: var(--text-dim); margin: 0 0 18px; }
.proj-points { margin: 0 0 26px; padding-left: 18px; color: var(--text-dim); font-size: 0.92rem; display: flex; flex-direction: column; gap: 8px; }

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform 0.3s, border-color 0.3s;
}
.project-card:hover { transform: translateY(-6px); border-color: rgba(139,107,255,0.35); }
.project-card-icon { font-size: 1.8rem; margin-bottom: 14px; }
.project-card h3 { margin: 0 0 10px; font-size: 1.05rem; }
.project-card p { margin: 0; color: var(--text-dim); font-size: 0.9rem; }
.project-card { display: flex; flex-direction: column; }
.project-card .proj-link, .more-card .btn { margin-top: 18px; align-self: flex-start; }

/* ---------- Book ---------- */
.book-wrap {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 56px;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
}
.book-cover { position: relative; }
.book-cover img {
  border-radius: 10px;
  box-shadow: 0 30px 60px -20px rgba(0,0,0,0.7);
  position: relative;
  z-index: 1;
  transition: transform 0.4s;
}
.book-cover:hover img { transform: perspective(800px) rotateY(-8deg) scale(1.02); }
.book-glow {
  position: absolute;
  inset: -20px;
  background: var(--grad);
  filter: blur(50px);
  opacity: 0.35;
  z-index: 0;
  border-radius: 20px;
}
.book-title-ar {
  font-family: "IBM Plex Sans Arabic", var(--font-display);
  font-size: 1.8rem;
  margin: 0 0 4px;
}
.book-title-en { color: var(--text-dimmer); margin: 0 0 20px; font-style: italic; }
.book-copy > p { color: var(--text-dim); margin: 0 0 22px; }
.book-meta { list-style: none; padding: 0; margin: 0 0 28px; display: flex; flex-direction: column; gap: 8px; color: var(--text-dim); font-size: 0.92rem; }
.book-meta strong { color: var(--text); }

/* ---------- Contact ---------- */
.contact-lead { color: var(--text-dim); margin: -36px 0 48px; }

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.contact-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 24px;
  transition: transform 0.25s, border-color 0.25s, background 0.25s;
}
.contact-card:not(.no-link):hover { transform: translateY(-4px); border-color: var(--cyan); background: var(--surface-hover); }
.contact-icon { font-size: 1.5rem; margin-bottom: 4px; }
.contact-label { color: var(--text-dimmer); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; }
.contact-value { font-size: 0.98rem; font-weight: 500; word-break: break-word; }
.contact-value.ltr-value { unicode-bidi: isolate; direction: ltr; display: block; text-align: start; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); padding: 28px 0; position: relative; z-index: 1; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; color: var(--text-dimmer); font-size: 0.85rem; }
.to-top {
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: all 0.25s;
}
.to-top:hover { background: var(--grad); color: #04121c; border-color: transparent; }

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.16,1,0.3,1), transform 0.7s cubic-bezier(0.16,1,0.3,1);
}
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { order: -1; margin-bottom: 20px; }
  .orbit-wrap { width: 300px; height: 300px; transform: scale(0.9); }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .feature-project { grid-template-columns: 1fr; }
  .feature-project-media { max-width: 360px; margin: 0 auto; }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .skills-grid { grid-template-columns: 1fr; }
  .project-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .book-wrap { grid-template-columns: 1fr; text-align: center; padding: 32px; }
  .book-cover { max-width: 240px; margin: 0 auto; }
  .book-meta { align-items: center; }
}

@media (max-width: 760px) {
  .nav-links {
    position: fixed;
    top: 0; right: 0;
    height: 100vh;
    width: min(78vw, 320px);
    background: rgba(8, 12, 22, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    gap: 28px;
    transform: translateX(100%);
    transition: transform 0.35s cubic-bezier(0.16,1,0.3,1);
    border-left: 1px solid var(--border);
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a { font-size: 1.05rem; }
  .nav-toggle { display: flex; }
  .nav-cta { display: none; }
  .about-facts { grid-template-columns: repeat(2, 1fr); }
  .course-grid { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .project-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .section { padding: 84px 0; }
  .timeline { padding-left: 24px; }
  .tl-dot { left: -29.5px; }
}

@media (max-width: 480px) {
  .cert-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { justify-content: center; }
  .about-facts { grid-template-columns: 1fr 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}


/* ---------- RTL / Arabic ---------- */
html[dir="rtl"] body { font-family: "IBM Plex Sans Arabic", var(--font); }
html[dir="rtl"] .brand,
html[dir="rtl"] .hero h1,
html[dir="rtl"] .hero-role,
html[dir="rtl"] .section-title,
html[dir="rtl"] .fact-num,
html[dir="rtl"] h3, html[dir="rtl"] h4 { font-family: "IBM Plex Sans Arabic", var(--font-display); }
html[dir="rtl"] .eyebrow .dot { order: 2; }

html[dir="rtl"] .timeline {
  border-left: none;
  border-right: 1px solid var(--border);
  padding-left: 0;
  padding-right: 32px;
}
html[dir="rtl"] .tl-dot { left: auto; right: -37.5px; }
html[dir="rtl"] .tl-card:hover { transform: translateX(-4px); }
html[dir="rtl"] .tl-card ul { padding-left: 0; padding-right: 18px; }
html[dir="rtl"] .proj-points { padding-left: 0; padding-right: 18px; }
html[dir="rtl"] .book-meta { padding-left: 0; }
html[dir="rtl"] .scroll-cue { left: 50%; transform: translateX(-50%); }
html[dir="rtl"] .hp-field { left: auto; right: -9999px; }

@media (max-width: 760px) {
  html[dir="rtl"] .nav-links { right: auto; left: 0; border-left: none; border-right: 1px solid var(--border); transform: translateX(-100%); }
  html[dir="rtl"] .nav-links.open { transform: translateX(0); }
  html[dir="rtl"] .timeline { padding-right: 24px; }
  html[dir="rtl"] .tl-dot { right: -29.5px; }
}