:root {
  --primary: #2563eb;
  --primary-rgb: 37, 99, 235;
  --btn-gradient: linear-gradient(135deg, #1d4ed8 0%, #3b82f6 100%);
  --radius: 16px;
  --nav-h: 72px;
}

[data-theme="dark"] {
  --secondary: #93c5fd;
  --gradient: linear-gradient(135deg, #3b82f6 0%, #dbeafe 100%);
  --bg: #050b1a;
  --bg-soft: #0a1530;
  --card: rgba(12, 24, 52, 0.6);
  --card-solid: #0c1a38;
  --border: rgba(96, 165, 250, 0.16);
  --text: #f8fafc;
  --muted: #a3b4cc;
  --chip: rgba(37, 99, 235, 0.15);
  --chip-text: #bfdbfe;
  --nav-bg: rgba(5, 11, 26, 0.78);
}

[data-theme="light"] {
  --secondary: #1d4ed8;
  --gradient: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
  --bg: #ffffff;
  --bg-soft: #f1f5fd;
  --card: rgba(255, 255, 255, 0.9);
  --card-solid: #ffffff;
  --border: rgba(37, 99, 235, 0.14);
  --text: #0b1b3a;
  --muted: #5b6b85;
  --chip: rgba(37, 99, 235, 0.07);
  --chip-text: #1d4ed8;
  --nav-bg: rgba(255, 255, 255, 0.85);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); }

body {
  font-family: "Tajawal", "Inter", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background 0.3s, color 0.3s;
}

[lang="en"] body { font-family: "Inter", "Tajawal", system-ui, sans-serif; }

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }

.container { width: min(1120px, 100% - 40px); margin-inline: auto; }

.bg-glow {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(600px circle at 15% 20%, rgba(var(--primary-rgb), 0.18), transparent 60%),
    radial-gradient(500px circle at 85% 70%, rgba(96, 165, 250, 0.1), transparent 60%),
    radial-gradient(400px circle at 60% 10%, rgba(219, 234, 254, 0.05), transparent 60%);
}

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.accent { color: var(--secondary); font-weight: 700; }
.muted { color: var(--muted); }
.center { text-align: center; margin-top: 40px; }

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  inset-inline: 0;
  height: var(--nav-h);
  z-index: 100;
  transition: background 0.3s, border-color 0.3s;
  border-bottom: 1px solid transparent;
}
.navbar.scrolled {
  background: var(--nav-bg);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--border);
}
.nav-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.logo { font-size: 1.25rem; font-weight: 800; }

.nav-links { display: flex; gap: 4px; }
.nav-link {
  padding: 6px 14px;
  border-radius: 10px;
  font-size: 0.92rem;
  color: var(--muted);
  transition: 0.2s;
}
.nav-link:hover { color: var(--text); }
.nav-link.active { color: var(--text); background: var(--chip); }

.nav-actions { display: flex; align-items: center; gap: 6px; }
.icon-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px;
  border-radius: 10px;
  color: var(--muted);
  transition: 0.2s;
}
.icon-btn:hover { color: var(--text); background: var(--chip); }
.icon-btn.round { border: 1px solid var(--border); border-radius: 50%; }
.lang-btn { font-size: 0.85rem; font-weight: 600; }
.menu-btn { display: none; }

[data-theme="dark"] .icon-moon,
[data-theme="light"] .icon-sun { display: none; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 0.95rem;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--btn-gradient); color: #fff; box-shadow: 0 8px 24px rgba(var(--primary-rgb), 0.3); }
.btn-primary:hover { box-shadow: 0 12px 32px rgba(var(--primary-rgb), 0.45); }
.btn-outline { border: 1px solid var(--border); background: var(--card); }
.btn-outline:hover { border-color: var(--primary); }
.btn.sm { padding: 8px 16px; font-size: 0.82rem; border-radius: 10px; }
.btn.full { width: 100%; }
.btn:disabled { opacity: 0.6; pointer-events: none; }

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: calc(var(--nav-h) + 40px) 0 80px;
}
.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; align-items: center; gap: 48px; }
.eyebrow { color: var(--primary); font-weight: 600; margin-bottom: 8px; }
.hero-name { font-size: clamp(2.8rem, 6vw, 4.5rem); line-height: 1.15; font-weight: 800; margin-bottom: 18px; }
.hero-name span { display: block; }
.hero-desc { color: var(--muted); font-size: 1.1rem; max-width: 520px; margin-bottom: 30px; }
.hero-btns { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 30px; }

.hero-social { display: flex; align-items: center; gap: 14px; margin-bottom: 36px; }
.social {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  color: var(--muted);
  border: 1px solid var(--border);
  transition: 0.2s;
}
.social:hover { color: var(--text); border-color: var(--primary); transform: translateY(-2px); }
.divider { width: 1px; height: 22px; background: var(--border); }
.hero-email { font-size: 0.85rem; color: var(--muted); }
.hero-email:hover { color: var(--text); }

.stats { display: flex; gap: 48px; }
.stat strong { display: block; font-size: 2rem; font-weight: 800; font-family: "Inter", sans-serif; }
.stat span { color: var(--muted); font-size: 0.85rem; }

.hero-visual { position: relative; display: grid; place-items: center; }
.avatar-ring {
  width: min(320px, 70vw);
  aspect-ratio: 1;
  border-radius: 50%;
  padding: 6px;
  background: var(--gradient);
  box-shadow: 0 0 80px rgba(var(--primary-rgb), 0.35);
  animation: float 6s ease-in-out infinite;
}
.avatar { width: 100%; height: 100%; border-radius: 50%; object-fit: cover; border: 6px solid var(--bg); }

.float-badge {
  position: absolute;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--card-solid);
  border: 1px solid var(--border);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  white-space: nowrap;
  direction: ltr;
  animation: float 5s ease-in-out infinite;
}
.b1 { top: 8%; inset-inline-start: 4%; }
.b2 { top: 45%; inset-inline-end: 0; animation-delay: -2s; }
.b3 { bottom: 6%; inset-inline-start: 12%; animation-delay: -3.5s; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.scroll-down {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--muted);
  animation: bounce 2s infinite;
}
@keyframes bounce {
  0%, 100% { transform: translate(-50%, 0); }
  50% { transform: translate(-50%, 8px); }
}

/* Sections */
.section { padding: 100px 0; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 56px; }
.section-title { font-size: clamp(2rem, 4vw, 2.8rem); font-weight: 800; margin-bottom: 12px; display: inline-block; }
.section-sub { color: var(--muted); font-size: 1.05rem; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(10px);
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.card:hover { border-color: rgba(var(--primary-rgb), 0.4); box-shadow: 0 16px 40px rgba(0, 0, 0, 0.18); }

/* About */
.about-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: start; }
.about-text p { color: var(--muted); margin-bottom: 18px; font-size: 1.05rem; }
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.chip, .tag {
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--chip);
  color: var(--chip-text);
  font-size: 0.82rem;
  font-weight: 600;
  border: 1px solid var(--border);
  direction: ltr;
}
.about-cards { display: grid; gap: 20px; }
.feature { padding: 28px; }
.feature:hover { transform: translateY(-4px); }
.feature-icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  border-radius: 14px;
  background: var(--chip);
  margin-bottom: 16px;
}
.feature h3 { margin-bottom: 6px; font-size: 1.15rem; }
.feature p { color: var(--muted); }

/* Skills */
.skills-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.skill-card { padding: 28px; }
.skill-card:hover { transform: translateY(-4px); }
.skill-card h3 { margin-bottom: 20px; font-size: 1.2rem; }
.skill-list { display: grid; gap: 10px; }
.skill-item {
  padding: 10px 16px;
  border-radius: 10px;
  background: var(--chip);
  border: 1px solid var(--border);
  font-weight: 500;
  transition: 0.2s;
}
.skill-item:hover { border-color: var(--primary); padding-inline-start: 22px; }

/* Projects */
.filters { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-bottom: 24px; }
.filter-btn {
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  font-weight: 600;
  font-size: 0.9rem;
  transition: 0.2s;
}
.filter-btn:hover { color: var(--text); }
.filter-btn.active { background: var(--btn-gradient); color: #fff; border-color: transparent; }

.slider-nav { display: flex; justify-content: center; gap: 10px; margin-bottom: 28px; }
[dir="ltr"] .slider-nav svg { transform: scaleX(-1); }

.projects-track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: calc((100% - 48px) / 3);
  gap: 24px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  padding: 6px 2px 16px;
}
.projects-track::-webkit-scrollbar { display: none; }

.project-card { scroll-snap-align: start; display: flex; flex-direction: column; overflow: hidden; }
.project-card:hover { transform: translateY(-6px); }

.project-media {
  position: relative;
  display: block;
  aspect-ratio: 16 / 9;
  margin: 14px 14px 0;
  border-radius: 12px;
  overflow: hidden;
  background: var(--bg-soft);
}
.project-media img { width: 100%; height: 100%; object-fit: cover; object-position: top; transition: transform 0.5s; }
.project-card:hover .project-media img { transform: scale(1.06); }
.media-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: rgba(5, 11, 26, 0.65);
  color: #fff;
  font-weight: 700;
  opacity: 0;
  transition: opacity 0.3s;
}
.project-media:hover .media-overlay { opacity: 1; }

.project-media.placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  background:
    radial-gradient(circle at 30% 20%, rgba(var(--primary-rgb), 0.55), transparent 60%),
    radial-gradient(circle at 80% 90%, rgba(147, 197, 253, 0.3), transparent 60%),
    #0a1a3d;
  color: #fff;
}
.ph-icon { font-size: 2.6rem; }
.ph-label { font-weight: 800; font-family: "Inter", sans-serif; font-size: 1.1rem; }
.project-media.placeholder code { font-size: 0.75rem; opacity: 0.7; }

.project-body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.project-body h3 { font-size: 1.12rem; margin-bottom: 8px; line-height: 1.5; }
.project-body p { font-size: 0.92rem; margin-bottom: 16px; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.tag { font-size: 0.74rem; padding: 4px 10px; }
.project-links { display: flex; gap: 10px; margin-top: auto; }
.project-links .btn { flex: 1; }

.dots { display: flex; justify-content: center; gap: 8px; margin-top: 18px; }
.dot { width: 8px; height: 8px; border-radius: 999px; background: var(--border); transition: 0.3s; }
.dot.active { width: 26px; background: var(--gradient); }

/* Services */
.services-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.service-card { padding: 30px; }
.service-card:hover { transform: translateY(-4px); }
.service-card h3 { font-size: 1.2rem; margin-bottom: 8px; }
.service-card ul { list-style: none; margin-top: 18px; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.service-card li { font-size: 0.9rem; display: flex; align-items: center; gap: 8px; }
.service-card li::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gradient);
  flex-shrink: 0;
}

/* Contact */
.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 28px; }
.contact-info, .contact-form { padding: 32px; }
.contact-info h3 { font-size: 1.3rem; margin-bottom: 8px; }
.contact-info > p { margin-bottom: 26px; }
.info-row { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
.info-icon { width: 46px; height: 46px; display: grid; place-items: center; border-radius: 12px; background: var(--chip); font-size: 1.2rem; flex-shrink: 0; }
.info-row small { display: block; color: var(--muted); font-size: 0.8rem; }
.info-row a, .info-row span { font-weight: 600; word-break: break-all; }

.contact-form { display: grid; gap: 18px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.contact-form label { display: grid; gap: 8px; font-size: 0.9rem; font-weight: 600; }
.contact-form input, .contact-form textarea {
  width: 100%;
  padding: 13px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--text);
  font: inherit;
  font-weight: 400;
  resize: vertical;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.contact-form input:focus, .contact-form textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.2);
}
.hp { position: absolute; left: -9999px; opacity: 0; }
.form-status { text-align: center; font-size: 0.9rem; min-height: 1.2em; }
.form-status.success { color: #34d399; }
.form-status.error { color: #f87171; }

/* Footer */
.footer { border-top: 1px solid var(--border); padding: 48px 0 32px; }
.footer-inner { display: grid; justify-items: center; gap: 14px; text-align: center; }
.footer-social { display: flex; gap: 10px; }
.copyright { color: var(--muted); font-size: 0.85rem; }

.to-top {
  position: fixed;
  bottom: 24px;
  inset-inline-end: 24px;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: var(--btn-gradient);
  color: #fff;
  box-shadow: 0 8px 24px rgba(var(--primary-rgb), 0.4);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: 0.3s;
  z-index: 90;
}
.to-top.show { opacity: 1; pointer-events: auto; transform: none; }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* Responsive */
@media (max-width: 980px) {
  .projects-track { grid-auto-columns: calc((100% - 24px) / 2); }
  .skills-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  .menu-btn { display: inline-flex; }
  .nav-links {
    position: absolute;
    top: var(--nav-h);
    inset-inline: 16px;
    flex-direction: column;
    padding: 12px;
    border-radius: var(--radius);
    background: var(--card-solid);
    border: 1px solid var(--border);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-link { padding: 10px 14px; }

  .hero-grid, .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .hero-text { text-align: center; }
  .hero-desc { margin-inline: auto; }
  .hero-btns, .hero-social, .stats { justify-content: center; }
  .services-grid { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .section { padding: 72px 0; }
  .projects-track { grid-auto-columns: 88%; }
  .skills-grid, .form-row { grid-template-columns: 1fr; }
  .stats { gap: 28px; }
  .float-badge { font-size: 0.7rem; }
  .service-card ul { grid-template-columns: 1fr; }
  .hero-email { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}