:root {
  --bg: #08090e;
  --panel: rgba(13, 17, 28, 0.7);
  --border: rgba(99, 102, 241, 0.15);
  --primary: #6366f1;
  --glow-primary: rgba(99, 102, 241, 0.4);
  --secondary: #10b981;
  --glow-secondary: rgba(16, 185, 129, 0.4);
  --accent: #f43f5e;
  --text: #f8fafc;
  --text-secondary: #94a3b8;
  --card-hover: rgba(25, 30, 48, 0.8);
  --img-bg: #060810;
  --footer-bg: #040508;
  --font-ar: 'Cairo', sans-serif;
  --font-en: 'Inter', sans-serif;
  --transition: color 0.3s, background-color 0.3s, border-color 0.3s, box-shadow 0.3s, transform 0.3s, opacity 0.3s;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ar);
  line-height: 1.6;
  overflow-x: hidden;
}
body[dir="ltr"] { font-family: var(--font-en); }

/* Skip link for accessibility */
[hidden], .pwa-install-toast[hidden] { display: none !important; }
.skip-link {
  position: absolute;
  top: -40px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: 0 0 8px 8px;
  text-decoration: none;
  font-weight: 600;
  z-index: 9999;
  transition: top 0.3s ease;
}
.skip-link:focus {
  top: 0;
  outline: 3px solid var(--secondary);
}

/* Focus outlines for accessibility */
:focus-visible {
  outline: 3px solid var(--secondary);
  outline-offset: 4px;
}

/* SVG sprite hidden */
.svg-sprite { display: none; }

/* SVG icon base */
.icon {
  display: inline-block;
  vertical-align: middle;
  fill: currentColor;
  color: currentColor;
}

/* Animated background - GPU optimized */
body::before, body::after {
  content: '';
  position: fixed;
  border-radius: 50%;
  filter: blur(150px);
  pointer-events: none;
  z-index: -1;
  will-change: transform;
}
body::before {
  top: 10%; left: 10%;
  width: 400px; height: 400px;
  background: var(--primary);
  opacity: 0.12;
  animation: float-bg 20s ease-in-out infinite;
}
body::after {
  bottom: 20%; right: 10%;
  width: 350px; height: 350px;
  background: var(--secondary);
  opacity: 0.1;
  animation: float-bg 25s ease-in-out infinite reverse;
}

@keyframes float-bg {
  0%, 100% { transform: translate(0, 0); }
  33% { transform: translate(30px, -30px); }
  66% { transform: translate(-20px, 20px); }
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }

/* Header */
header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(8, 9, 14, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  padding: 1rem 0;
  transition: var(--transition);
}
header.scrolled {
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.nav-wrapper { display: flex; justify-content: space-between; align-items: center; }

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  letter-spacing: -0.5px;
}
.logo span { color: var(--primary); text-shadow: 0 0 15px var(--glow-primary); }

.logo img {
  height: 78px;
  width: auto;
  object-fit: contain;
  display: block;
  transition: var(--transition);
}
.logo-dark { display: none; }
.logo-light { display: none; }
[data-theme="dark"] .logo-dark { display: inline-block !important; }
[data-theme="dark"] .logo-light { display: none !important; }
[data-theme="light"] .logo-dark { display: none !important; }
[data-theme="light"] .logo-light { display: inline-block !important; }

.nav-menu { display: flex; align-items: center; list-style: none; gap: 2rem; }

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition);
  position: relative;
  padding: 0.5rem 0;
}
.nav-link:hover, .nav-link.active { color: var(--primary); }

.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  background: var(--primary);
  box-shadow: 0 0 10px var(--glow-primary);
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
body[dir="rtl"] .nav-link::after { right: 0; left: auto; }
body[dir="ltr"] .nav-link::after { left: 0; }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

.nav-actions { display: flex; align-items: center; gap: 1rem; }

.btn-lang {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  font-family: inherit;
  transition: var(--transition);
}
.btn-lang:hover {
  background: rgba(99,102,241,0.15);
  border-color: var(--primary);
  box-shadow: 0 0 20px var(--glow-primary);
}

.btn-icon {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text);
  width: 42px;
  height: 42px;
  border-radius: 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.btn-icon:hover {
  background: rgba(99,102,241,0.15);
  border-color: var(--primary);
  box-shadow: 0 0 20px var(--glow-primary);
  transform: translateY(-2px);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: var(--transition);
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 100px;
  position: relative;
  overflow: hidden;
}
.hero-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
}
.hero-content { display: flex; flex-direction: column; gap: 1.5rem; }

.badge {
  display: inline-flex;
  align-items: center;
  width: max-content;
  padding: 0.5rem 1rem;
  background: rgba(16,185,129,0.1);
  border: 1px solid rgba(16,185,129,0.2);
  color: var(--secondary);
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.85rem;
  animation: pulse-glow 2s ease-in-out infinite alternate;
}

@keyframes pulse-glow {
  0% { box-shadow: 0 0 5px rgba(16,185,129,0.2); }
  100% { box-shadow: 0 0 20px rgba(16,185,129,0.4); }
}

.hero-title { font-size: 3.5rem; font-weight: 800; line-height: 1.2; }
.gradient-text {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-subtitle {
  font-size: 1.5rem;
  color: var(--text-secondary);
  font-weight: 500;
  min-height: 2.4rem;
}
.typed-cursor { color: var(--primary); animation: blink 0.8s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }
.hero-description { color: var(--text-secondary); font-size: 1.1rem; max-width: 600px; }

.hero-buttons { display: flex; gap: 1rem; margin-top: 1rem; }

.btn-primary, .btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.8rem;
  border-radius: 12px;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), #4f46e5);
  color: var(--text);
  box-shadow: 0 0 20px var(--glow-primary);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 0 30px var(--glow-primary); }
.btn-secondary {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.2);
  transform: translateY(-3px);
}

.hero-image-container { display: flex; justify-content: center; align-items: center; }

.hero-image-wrapper {
  width: 480px;
  height: 480px;
  border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  background: linear-gradient(45deg, var(--primary), var(--secondary));
  box-shadow: 0 20px 40px rgba(0,0,0,0.4), 0 0 30px var(--glow-primary);
  overflow: hidden;
  animation: morph 8s ease-in-out infinite alternate;
  border: 3px solid rgba(255,255,255,0.1);
  will-change: border-radius;
}
.hero-image { width: 100%; height: 100%; object-fit: contain; object-position: center; transition: var(--transition); }
.hero-image-wrapper:hover .hero-image { transform: scale(1.05); }

@keyframes morph {
  0% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; }
  50% { border-radius: 70% 30% 30% 70% / 70% 70% 30% 30%; }
  100% { border-radius: 50% 50% 30% 70% / 50% 60% 40% 50%; }
}

/* Sections */
.section {
  padding: 6rem 0;
  content-visibility: auto;
  contain-intrinsic-size: 0 600px;
}

.section-header { text-align: center; margin-bottom: 4rem; }

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  position: relative;
  display: inline-block;
  margin-bottom: 1rem;
}
.section-title span { color: var(--primary); text-shadow: 0 0 15px var(--glow-primary); }
.section-title::after {
  content: '';
  position: absolute;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  border-radius: 10px;
}
.section-subtitle { color: var(--text-secondary); font-size: 1.1rem; }

/* About */
.about-wrapper { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 4rem; align-items: center; }
.about-text { display: flex; flex-direction: column; gap: 1.2rem; font-size: 1.05rem; color: var(--text-secondary); }
.about-text p span { color: var(--text); font-weight: 600; }

.about-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 1rem;
}
.about-card {
  background: var(--panel);
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
  padding: 1.5rem;
  border-radius: 16px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.about-card:hover {
  transform: translateY(-5px);
  border-color: rgba(99,102,241,0.4);
  box-shadow: 0 0 20px var(--glow-primary);
}
.about-card-icon { color: var(--secondary); }
.about-card-icon .icon { width: 32px; height: 32px; color: var(--secondary); }
.about-card-title { font-size: 1.15rem; font-weight: 700; color: var(--text); }
.about-card-desc { font-size: 0.9rem; color: var(--text-secondary); }

.about-illustration { display: flex; justify-content: center; }

.debi-logo-card {
  width: 100%;
  max-width: 380px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  box-shadow: 0 15px 35px rgba(0,0,0,0.2);
  text-align: center;
}
.debi-icon {
  width: 100px;
  height: 100px;
  background: rgba(99,102,241,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  box-shadow: 0 0 20px var(--glow-primary);
}
.debi-icon .icon { width: 48px; height: 48px; color: var(--primary); }

/* Skills */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}
.skill-card {
  background: var(--panel);
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  padding: 2rem;
  text-align: center;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}
.skill-card:hover {
  transform: translateY(-8px);
  background: var(--card-hover);
  border-color: var(--secondary);
  box-shadow: 0 0 20px var(--glow-secondary);
}
.skill-icon {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.skill-icon .icon { width: 36px; height: 36px; }
.skill-card:hover .skill-icon {
  background: rgba(16,185,129,0.1);
  border-color: var(--secondary);
  transform: scale(1.1) rotate(5deg);
}
.skill-title { font-size: 1.2rem; font-weight: 700; color: var(--text); }
.skill-desc { font-size: 0.9rem; color: var(--text-secondary); }

/* Projects */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2.5rem;
}
.project-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.35s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.3s, box-shadow 0.3s;
  opacity: 1;
  transform: scale(1);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}
.project-card:hover {
  transform: translateY(-8px);
  border-color: var(--primary);
  box-shadow: 0 0 25px var(--glow-primary);
}
.project-img-wrapper {
  height: 200px;
  overflow: hidden;
  position: relative;
}
.project-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: var(--img-bg);
  transition: var(--transition);
}
.project-card:hover .project-img { transform: scale(1.08); }

.project-badge {
  position: absolute;
  top: 1rem;
  background: rgba(8,9,14,0.85);
  backdrop-filter: blur(4px);
  border: 1px solid var(--primary);
  color: var(--text);
  padding: 0.3rem 0.8rem;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
}
body[dir="rtl"] .project-badge { right: auto; left: 1rem; }
body[dir="ltr"] .project-badge { left: auto; right: 1rem; }

.project-info {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  flex-grow: 1;
}
.project-name { font-size: 1.3rem; font-weight: 700; color: var(--text); }
.project-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.project-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: auto; padding-top: 0.5rem; }
.project-tag {
  font-size: 0.75rem;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  color: var(--text-secondary);
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
}

/* Certs */
.cert-featured {
  display: flex;
  justify-content: center;
  margin-bottom: 2.5rem;
}
.cert-featured .cert-card {
  width: 100%;
  max-width: 350px;
}
.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}
.cert-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}
.cert-card:hover {
  transform: translateY(-5px);
  border-color: var(--secondary);
  box-shadow: 0 0 20px var(--glow-secondary);
}
.cert-img-wrapper {
  height: 170px;
  overflow: hidden;
  background: var(--img-bg);
  display: flex;
  justify-content: center;
  align-items: center;
}
.cert-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: var(--transition);
}
.cert-card:hover .cert-img { transform: scale(1.05); }
.cert-info { padding: 1.2rem; display: flex; flex-direction: column; gap: 0.4rem; flex-grow: 1; text-align: center; align-items: center; }
.cert-title { font-size: 1rem; font-weight: 700; color: var(--text); }
.cert-issuer { font-size: 0.85rem; color: var(--secondary); font-weight: 600; }

/* Contact */
.contact-wrapper {
  max-width: 1000px;
  margin: 0 auto;
  background: var(--panel);
  border: 1px solid var(--border);
  backdrop-filter: blur(15px);
  padding: 3rem;
  border-radius: 24px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.4);
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

@media (min-width: 992px) {
  .contact-wrapper {
    grid-template-columns: 1fr 1fr;
  }
}

.contact-info { display: flex; flex-direction: column; align-items: center; text-align: center; gap: 2rem; }
.contact-title { font-size: 1.8rem; font-weight: 700; }
.contact-title span { color: var(--secondary); }
.contact-desc { color: var(--text-secondary); font-size: 1.05rem; }

.contact-links { display: flex; justify-content: center; gap: 2rem; flex-wrap: wrap; width: 100%; }
.contact-item {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  padding: 0.8rem 1.5rem;
  border-radius: 12px;
  transition: var(--transition);
}
.contact-item:hover {
  background: rgba(16,185,129,0.1);
  border-color: var(--secondary);
  transform: translateY(-3px);
  box-shadow: 0 0 20px var(--glow-secondary);
}
.contact-item .icon { width: 24px; height: 24px; color: var(--secondary); }

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-weight: 600;
  color: var(--text);
}

.form-group input,
.form-group textarea {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 12px;
  padding: 0.8rem 1rem;
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 15px var(--glow-primary);
}

.form-group textarea {
  resize: vertical;
  min-height: 150px;
}

/* Timeline */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 0;
}
.timeline::before {
  content: '';
  position: absolute;
  width: 4px;
  background: linear-gradient(to bottom, var(--primary), var(--secondary));
  top: 0;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  border-radius: 2px;
}
.timeline-item {
  position: relative;
  width: 50%;
  padding: 1rem 2rem;
  box-sizing: border-box;
}
.timeline-item:nth-child(odd) {
  left: 0;
  text-align: right;
}
.timeline-item:nth-child(even) {
  left: 50%;
  text-align: left;
}
.timeline-icon {
  position: absolute;
  width: 50px;
  height: 50px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 0 15px var(--glow-primary);
  z-index: 1;
}
.timeline-icon .icon { width: 24px; height: 24px; color: white; }
.timeline-item:nth-child(odd) .timeline-icon {
  right: -25px;
}
.timeline-item:nth-child(even) .timeline-icon {
  left: -25px;
}
.timeline-content {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
  backdrop-filter: blur(10px);
  transition: var(--transition);
}
.timeline-content:hover {
  transform: translateY(-5px);
  border-color: var(--primary);
  box-shadow: 0 0 20px var(--glow-primary);
}
.timeline-date {
  color: var(--secondary);
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.timeline-title {
  color: var(--text);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.timeline-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
}
@media (max-width: 768px) {
  .timeline::before { left: 30px; }
  .timeline-item {
    width: 100%;
    padding-left: 70px;
    padding-right: 20px;
  }
  .timeline-item:nth-child(odd),
  .timeline-item:nth-child(even) {
    left: 0;
    text-align: left;
  }
  .timeline-item:nth-child(odd) .timeline-icon,
  .timeline-item:nth-child(even) .timeline-icon {
    left: 5px;
  }
}

/* Testimonials */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}
.testimonial-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.testimonial-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
}
.testimonial-card:hover {
  transform: translateY(-8px);
  border-color: var(--primary);
  box-shadow: 0 15px 40px rgba(0,0,0,0.3), 0 0 30px var(--glow-primary);
}
.testimonial-quote {
  margin-bottom: 1rem;
  opacity: 0.3;
}
.testimonial-quote .icon { width: 32px; height: 32px; color: var(--primary); }
.testimonial-text {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text);
  margin-bottom: 1.5rem;
  font-style: italic;
  border: none;
  padding: 0;
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.testimonial-avatar {
  width: 50px; height: 50px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: white;
}
.testimonial-avatar .icon { width: 24px; height: 24px; color: white; }
.testimonial-name {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
}
.testimonial-role {
  font-size: 0.9rem;
  color: var(--text-secondary);
}
@media (max-width: 768px) {
  .testimonials-grid { grid-template-columns: 1fr; }
}

/* Dialog */
dialog {
  margin: auto;
  border: 1px solid var(--border);
  background: rgba(13,17,28,0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  color: var(--text);
  border-radius: 20px;
  padding: 0;
  max-width: 750px;
  width: 90%;
  box-shadow: 0 25px 50px rgba(0,0,0,0.5), 0 0 30px var(--glow-primary);
  overflow: hidden;
}
dialog::backdrop {
  background: rgba(4,5,8,0.85);
  backdrop-filter: blur(8px);
}
.dialog-wrapper { display: flex; flex-direction: column; }
.dialog-header {
  padding: 1.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.dialog-title { font-size: 1.3rem; font-weight: 700; }
.btn-close-dialog {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text-secondary);
  width: 36px; height: 36px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.btn-close-dialog .icon { width: 18px; height: 18px; }
.btn-close-dialog:hover { background: var(--accent); color: #fff; border-color: var(--accent); box-shadow: 0 0 15px rgba(244,63,94,0.5); }
.dialog-body { padding: 2rem; max-height: 70vh; overflow-y: auto; }
.project-detail-img { width: 100%; max-height: 350px; object-fit: contain; border-radius: 12px; margin-bottom: 1.5rem; border: 1px solid rgba(255,255,255,0.08); }
.project-detail-desc { font-size: 1.05rem; color: var(--text-secondary); }
.project-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}
.project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  border: 1px solid transparent;
}
.project-link-github {
  background: rgba(255,255,255,0.05);
  color: var(--text);
  border-color: rgba(255,255,255,0.1);
}
.project-link-github:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--primary);
  box-shadow: 0 0 15px rgba(99,102,241,0.3);
}
.project-link-demo {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  border-color: transparent;
}
.project-link-demo:hover {
  box-shadow: 0 0 15px rgba(99,102,241,0.5);
  transform: translateY(-2px);
}
.project-link .icon { width: 18px; height: 18px; }
.cert-detail-img { width: 100%; max-height: 80vh; object-fit: contain; border-radius: 8px; }

.projects-unavailable {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--text-secondary);
}

.project-highlight-item {
  margin-bottom: 0.5rem;
}

/* Footer */
footer {
  background: var(--footer-bg);
  padding: 3rem 0;
  border-top: 1px solid rgba(255,255,255,0.05);
  text-align: center;
  color: var(--text-secondary);
}
.footer-content { display: flex; flex-direction: column; align-items: center; gap: 1rem; }
.footer-logo { font-size: 1.25rem; font-weight: 700; color: var(--text); text-decoration: none; }
.footer-logo span { color: var(--primary); }
.footer-credit span { color: var(--accent); }
.footer-credit { font-size: 0.9rem; }

/* Responsive */
@media (max-width: 992px) {
  .hero-wrapper { grid-template-columns: 1fr; text-align: center; gap: 3rem; }
  .badge { margin: 0 auto; }
  .hero-description { margin: 0 auto; }
  .hero-buttons { justify-content: center; }
  .about-wrapper { grid-template-columns: 1fr; gap: 3rem; }
  .about-illustration { order: -1; }
  .hero-title { font-size: 2.8rem; }
  .hero-image-wrapper { width: 360px; height: 360px; }
}

@media (max-width: 768px) {
  .logo img { height: 60px; }
  .hamburger { display: flex; }
  .nav-menu {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: rgba(8,9,14,0.98);
    backdrop-filter: blur(15px);
    flex-direction: column;
    padding: 3rem 0;
    transition: var(--transition);
    border-top: 1px solid rgba(255,255,255,0.05);
  }
  .nav-menu.active { left: 0; }
  body[dir="rtl"] .nav-menu { left: auto; right: -100%; }
  body[dir="rtl"] .nav-menu.active { right: 0; }
  .hero-title { font-size: 2.2rem; }
  .section-title { font-size: 1.8rem; }
  .about-highlights { grid-template-columns: 1fr; }
  .contact-wrapper { padding: 2rem 1.5rem; }
  .hero-image-wrapper { width: 320px; height: 320px; }
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.active { opacity: 1; transform: translateY(0); }

/* Noscript fallback */
noscript .reveal { opacity: 1 !important; transform: none !important; }
noscript .noscript-msg {
  text-align: center;
  padding: 2rem;
  background: #1a1a2e;
  color: #fff;
  font-family: sans-serif;
}

/* Honeypot anti-spam */
.form-group--honeypot {
  position: absolute;
  left: -9999px;
  height: 0;
  width: 0;
  overflow: hidden;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* Scroll progress bar */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  box-shadow: 0 0 10px var(--glow-primary);
  z-index: 2000;
  transition: width 0.1s linear;
}

/* Back to top */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  left: 2rem;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), #4f46e5);
  color: var(--text);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px var(--glow-primary);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition);
  z-index: 1500;
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 0 30px var(--glow-primary);
}
.back-to-top .icon { width: 20px; height: 20px; }
body[dir="rtl"] .back-to-top { left: auto; right: 2rem; }

/* ===== Light / Pastel Theme ===== */
[data-theme="light"] {
  --bg: #f6f4fc;
  --panel: rgba(255, 255, 255, 0.7);
  --border: rgba(139, 92, 246, 0.18);
  --primary: #8b5cf6;
  --glow-primary: rgba(139, 92, 246, 0.3);
  --secondary: #ec4899;
  --glow-secondary: rgba(236, 72, 153, 0.3);
  --accent: #f43f5e;
  --text: #2d2a4a;
  --text-secondary: #4a4468;
  --card-hover: rgba(255, 255, 255, 0.95);
  --img-bg: #ffffff;
  --footer-bg: #ece9f5;

  background: linear-gradient(160deg, #f6f4fc 0%, #fdf2f8 100%);
}

[data-theme="light"] header {
  background: rgba(255, 255, 255, 0.8);
  border-bottom: 1px solid rgba(139, 92, 246, 0.12);
}
[data-theme="light"] header.scrolled {
  border-bottom: 1px solid var(--border);
}

[data-theme="light"] dialog {
  background: rgba(255, 255, 255, 0.97);
  color: var(--text);
}
[data-theme="light"] dialog::backdrop {
  background: rgba(255, 255, 255, 0.7);
}

[data-theme="light"] .btn-icon,
[data-theme="light"] .btn-lang,
[data-theme="light"] .contact-item,
[data-theme="light"] .btn-close-dialog {
  background: rgba(255, 255, 255, 0.6);
  border-color: rgba(139, 92, 246, 0.15);
  color: var(--text);
}

[data-theme="light"] .skill-icon,
[data-theme="light"] .project-tag,
[data-theme="light"] .btn-secondary {
  background: rgba(255, 255, 255, 0.6);
}

[data-theme="light"] .hero-image-wrapper {
  border-color: rgba(255, 255, 255, 0.6);
}

[data-theme="light"] .form-group input,
[data-theme="light"] .form-group textarea {
  background: rgba(255, 255, 255, 0.8);
  border-color: rgba(139, 92, 246, 0.2);
  color: var(--text);
}

[data-theme="light"] .testimonial-card,
[data-theme="light"] .project-link-github {
  background: rgba(255, 255, 255, 0.75);
  border-color: rgba(139, 92, 246, 0.15);
}

/* Print styles */
@media print {
  body::before, body::after,
  .scroll-progress, .back-to-top, .hamburger,
  .nav-actions, header, .hero-buttons,
  dialog { display: none !important; }

  body {
    background: white !important;
    color: black !important;
    font-size: 12pt;
  }

  .section { padding: 1rem 0; break-inside: avoid; }
  .reveal { opacity: 1 !important; transform: none !important; }

  a { color: black !important; text-decoration: underline; }

  .hero { min-height: auto; padding-top: 0; }
  .hero-image-wrapper { width: 150px; height: 150px; }

  .contact-wrapper { max-width: 100%; box-shadow: none; border: 1px solid #ccc; }
}

/* Projects Category Filter */
.projects-filter {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.filter-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 0.6rem 1.4rem;
  border-radius: 50px;
  cursor: pointer;
  font-family: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
}

.filter-btn:hover {
  color: var(--text);
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.1);
  transform: translateY(-2px);
}

.filter-btn.active {
  background: linear-gradient(135deg, var(--primary), #4f46e5);
  color: var(--text);
  border-color: transparent;
  box-shadow: 0 0 20px var(--glow-primary);
}

.project-card.filtered-out {
  opacity: 0;
  transform: scale(0.92);
  pointer-events: none;
}

/* Kudos Encouragement Section */
.kudos-section {
  padding: 4rem 0;
}

.kudos-wrapper {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(16, 185, 129, 0.1));
  border: 1px solid var(--border);
  backdrop-filter: blur(15px);
  padding: 3rem 2rem;
  border-radius: 24px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
  max-width: 700px;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
}

.kudos-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
}

.kudos-count-text {
  font-size: 1.1rem;
  color: var(--text-secondary);
}

.kudos-count-text span#kudos-count {
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--secondary);
}

.btn-kudos {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: var(--text);
  border: none;
  padding: 1rem 2.2rem;
  border-radius: 50px;
  font-size: 1.1rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  box-shadow: 0 0 25px var(--glow-primary);
  transition: var(--transition);
  user-select: none;
  position: relative;
}

.btn-kudos:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 0 35px var(--glow-secondary);
}

.btn-kudos:active {
  transform: translateY(0) scale(0.98);
}

.kudos-icon {
  font-size: 1.5rem;
  display: inline-block;
  transition: transform 0.2s ease;
}

.btn-kudos:hover .kudos-icon {
  transform: rotate(-15deg) scale(1.2);
}

/* Floating Confetti Animation */
.confetti-particle {
  position: fixed;
  pointer-events: none;
  z-index: 9999;
  font-size: 1.5rem;
  animation: floatUpAndFade 1.2s ease-out forwards;
}

@keyframes floatUpAndFade {
  0% {
    opacity: 1;
    transform: translate(0, 0) scale(1) rotate(0deg);
  }
  100% {
    opacity: 0;
    transform: translate(var(--tx, 0px), -120px) scale(1.5) rotate(var(--tr, 45deg));
  }
}

/* Blog Section */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.blog-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 1.8rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  backdrop-filter: blur(12px);
  transition: var(--transition);
}

.blog-card:hover {
  transform: translateY(-6px);
  border-color: var(--primary);
  box-shadow: 0 0 25px var(--glow-primary);
}

.blog-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.blog-badge {
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid var(--border);
  color: var(--primary);
  padding: 0.25rem 0.75rem;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
}

.blog-date {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.blog-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
}

.blog-card-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.cert-detail-desc {
  margin-top: 1rem;
  font-size: 1rem;
  color: var(--text-secondary);
  text-align: center;
}

/* PWA Install Toast Prompt */
.pwa-install-toast {
  position: fixed;
  bottom: 2rem;
  left: 2rem;
  z-index: 9990;
  background: var(--panel);
  border: 1px solid var(--primary);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4), 0 0 20px var(--glow-primary);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 1.2rem 1.6rem;
  border-radius: 18px;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  max-width: 380px;
  animation: slideUpToast 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

body[dir="rtl"] .pwa-install-toast {
  left: auto;
  right: 2rem;
}

.pwa-toast-close {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.4rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  z-index: 2;
}

body[dir="rtl"] .pwa-toast-close {
  right: auto;
  left: 0.6rem;
}

.pwa-toast-close:hover {
  color: var(--accent);
  background: rgba(244, 63, 94, 0.15);
  transform: scale(1.1);
}

.pwa-toast-buttons {
  display: flex;
  gap: 0.6rem;
}

.btn-sm {
  padding: 0.5rem 1rem !important;
  font-size: 0.85rem !important;
}

@keyframes slideUpToast {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}