@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
  --primary: #0099FF;
  --primary-dark: #0077CC;
  --primary-light: #66C2FF;
  --primary-rgb: 0, 153, 255;
  --secondary: #0A1628;
  --secondary-light: #0F1D35;
  --secondary-rgb: 10, 22, 40;
  --white: #FFFFFF;
  --gray-50: #F8FAFC;
  --gray-100: #F1F5F9;
  --gray-200: #E2E8F0;
  --gray-300: #CBD5E1;
  --gray-400: #94A3B8;
  --gray-500: #64748B;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1E293B;
  --gray-900: #0F172A;
  --gradient: linear-gradient(135deg, #0099FF, #66C2FF);
  --gradient-dark: linear-gradient(135deg, #0A1628, #1A2D4A);
  --gradient-hero: linear-gradient(135deg, #0A1628 0%, #001F3F 40%, #003366 70%, #0055A5 100%);
  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --card-shadow-hover: 0 12px 40px rgba(0, 153, 255, 0.15);
  --transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-slow: all 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --whatsapp: #25D366;
  --whatsapp-dark: #1DA851;
}

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

html { scroll-behavior: smooth; overflow-x: hidden; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--secondary);
  color: var(--gray-100);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection { background: var(--primary); color: var(--white); }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-light); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }

.section {
  padding: 110px 0;
  position: relative;
  overflow: hidden;
}

.section-header { text-align: center; margin-bottom: 64px; }

.section-subtitle {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--primary);
  background: rgba(var(--primary-rgb), 0.1);
  padding: 8px 22px;
  border-radius: 100px;
  margin-bottom: 18px;
  border: 1px solid rgba(var(--primary-rgb), 0.15);
}

.section-title {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 800;
  color: var(--white);
  line-height: 1.15;
  margin-bottom: 18px;
}

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

.section-desc {
  font-size: 17px;
  color: var(--gray-400);
  max-width: 620px;
  margin: 0 auto;
  line-height: 1.8;
}

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 15px 34px; font-size: 15px; font-weight: 600;
  border-radius: 100px; border: none; cursor: pointer;
  transition: var(--transition); text-decoration: none;
  position: relative; overflow: hidden;
}

.btn-primary {
  background: var(--gradient); color: var(--white);
  box-shadow: 0 4px 25px rgba(var(--primary-rgb), 0.35);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 40px rgba(var(--primary-rgb), 0.5);
  color: var(--white);
}

.btn-outline {
  background: transparent; color: var(--white);
  border: 2px solid rgba(255, 255, 255, 0.25);
}

.btn-outline:hover {
  border-color: var(--primary);
  background: rgba(var(--primary-rgb), 0.12);
  color: var(--white);
  transform: translateY(-3px);
}

.btn-sm { padding: 11px 26px; font-size: 13px; }

.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
}

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 32px;
  transition: var(--transition);
}

.glass-card:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-8px);
  box-shadow: var(--glass-shadow);
  border-color: rgba(var(--primary-rgb), 0.2);
}

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

/* ======== PRELOADER ======== */
#preloader {
  position: fixed; inset: 0; z-index: 99999;
  background: var(--secondary);
  display: flex; align-items: center; justify-content: center;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}
#preloader.hidden { opacity: 0; visibility: hidden; }
.loader-ring {
  width: 60px; height: 60px; border-radius: 50%;
  border: 3px solid transparent;
  border-top-color: var(--primary);
  border-right-color: var(--primary-light);
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ======== NAVIGATION ======== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 22px 0;
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(10, 22, 40, 0.88);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding: 12px 0;
}

.navbar .container { display: flex; align-items: center; justify-content: space-between; }

.nav-logo {
  font-size: 26px; font-weight: 800; color: var(--white);
  display: flex; align-items: center; gap: 4px;
}

.nav-logo .logo-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--primary); display: inline-block;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.7); }
}

.nav-links { display: flex; align-items: center; gap: 32px; }

.nav-links a {
  color: var(--gray-300); font-size: 14px; font-weight: 500;
  position: relative; padding: 4px 0;
}

.nav-links a::after {
  content: ''; position: absolute; bottom: -2px; left: 0;
  width: 0; height: 2px;
  background: var(--gradient);
  transition: width 0.3s ease; border-radius: 2px;
}

.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-links a:hover, .nav-links a.active { color: var(--white); }

.nav-cta { margin-left: 16px; }

.hamburger {
  display: none; flex-direction: column; gap: 5px;
  cursor: pointer; padding: 4px; background: none; border: none;
}

.hamburger span {
  width: 28px; height: 2px; background: var(--white);
  border-radius: 4px; transition: var(--transition);
}

.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; transform: translateX(-10px); }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ======== HERO SLIDER ======== */
#hero {
  position: relative;
  height: 100vh;
  min-height: 700px;
  overflow: hidden;
}

.hero-slider {
  position: absolute; inset: 0;
}

.hero-slide {
  position: absolute; inset: 0;
  opacity: 0;
  transition: opacity 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 1.2s ease;
  transform: scale(1.05);
}

.hero-slide.active {
  opacity: 1;
  transform: scale(1);
}

.hero-slide-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  will-change: transform;
}

.hero-slide.active .hero-slide-bg {
  animation: hero-zoom 8s ease-out forwards;
}

@keyframes hero-zoom {
  0% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

.hero-slide-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(
    135deg,
    rgba(10, 22, 40, 0.92) 0%,
    rgba(10, 22, 40, 0.7) 40%,
    rgba(0, 153, 255, 0.25) 100%
  );
}

.hero-slide-content {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
}

.hero-slide-content .container {
  position: relative;
  z-index: 2;
}

.hero-slide .hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 500; color: var(--primary-light);
  background: rgba(var(--primary-rgb), 0.12);
  border: 1px solid rgba(var(--primary-rgb), 0.2);
  padding: 8px 20px; border-radius: 100px; margin-bottom: 24px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.hero-slide .hero-badge-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--primary);
  animation: pulse-dot 2s infinite;
}

.hero-slide .hero-title {
  font-size: clamp(40px, 6.5vw, 72px);
  font-weight: 900; line-height: 1.06; color: var(--white);
  margin-bottom: 6px;
}

.hero-slide .hero-title .highlight {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-slide .hero-tagline {
  font-size: clamp(18px, 2.5vw, 28px);
  font-weight: 400; color: var(--gray-300);
  margin-bottom: 6px;
  min-height: 44px;
}

.hero-slide .hero-tagline .typing-cursor {
  display: inline-block; width: 3px; height: 1em;
  background: var(--primary); margin-left: 4px;
  animation: blink 1s step-end infinite;
  vertical-align: text-bottom;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.hero-slide .hero-desc {
  font-size: 18px; color: var(--gray-400);
  max-width: 560px; margin-bottom: 36px; line-height: 1.8;
}

.hero-slide .hero-actions {
  display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px;
}

.hero-slider-nav {
  position: absolute; bottom: 40px; left: 50%;
  transform: translateX(-50%); z-index: 5;
  display: flex; gap: 12px;
}

.hero-slider-dot {
  width: 12px; height: 12px; border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  border: 2px solid rgba(255, 255, 255, 0.3);
  cursor: pointer; transition: var(--transition);
  padding: 0;
}

.hero-slider-dot.active {
  background: var(--primary);
  border-color: var(--primary);
  box-shadow: 0 0 20px rgba(var(--primary-rgb), 0.4);
  width: 36px;
  border-radius: 10px;
}

.hero-slider-arrow {
  position: absolute; top: 50%; transform: translateY(-50%);
  z-index: 5; width: 52px; height: 52px; border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--white); font-size: 20px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: var(--transition);
}

.hero-slider-arrow:hover {
  background: var(--gradient);
  border-color: transparent;
  transform: translateY(-50%) scale(1.1);
}

.hero-slider-arrow.prev { left: 24px; }
.hero-slider-arrow.next { right: 24px; }

/* ======== HERO FLOATING ELEMENTS ======== */
.hero-floating-elements {
  position: absolute; inset: 0; pointer-events: none; z-index: 1; overflow: hidden;
}

.hero-glass-sphere {
  position: absolute; border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(var(--primary-rgb), 0.12), transparent 70%);
  border: 1px solid rgba(var(--primary-rgb), 0.08);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  animation: float-sphere 10s ease-in-out infinite;
}

.hero-glass-sphere:nth-child(1) { width: 500px; height: 500px; top: -150px; right: -100px; animation-delay: 0s; }
.hero-glass-sphere:nth-child(2) { width: 300px; height: 300px; bottom: 5%; left: -120px; animation-delay: -3s; }
.hero-glass-sphere:nth-child(3) { width: 180px; height: 180px; top: 35%; right: 12%; animation-delay: -6s; }

@keyframes float-sphere {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-40px) scale(1.06); }
}

/* ======== ABOUT ======== */
#about { background: var(--secondary); position: relative; }

#about::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(var(--primary-rgb), 0.4), transparent);
}

.about-bg {
  position: absolute; inset: 0; opacity: 0.03;
  background-image: url('https://images.unsplash.com/photo-1518770660439-4636190af475?auto=format&fit=crop&w=1920&q=80');
  background-size: cover; background-position: center; background-attachment: fixed;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: center;
}

.about-image-wrapper { position: relative; }

.about-image-card {
  position: relative; width: 100%; aspect-ratio: 4/5;
  border-radius: 24px; overflow: hidden;
}

.about-image-card img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.6s ease;
}

.about-image-card:hover img { transform: scale(1.05); }

.about-image-card::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(var(--primary-rgb), 0.15), transparent 50%);
}

.about-exp-badge {
  position: absolute; bottom: -20px; right: -20px;
  background: var(--gradient); padding: 24px; border-radius: 20px;
  color: var(--white); text-align: center; min-width: 130px;
  box-shadow: 0 12px 40px rgba(var(--primary-rgb), 0.35);
  z-index: 2;
}

.about-exp-number { font-size: 38px; font-weight: 900; line-height: 1; }
.about-exp-label { font-size: 12px; opacity: 0.9; margin-top: 4px; }

.about-content h3 {
  font-size: 30px; font-weight: 700; color: var(--white); margin-bottom: 20px;
}

.about-content p {
  color: var(--gray-400); margin-bottom: 16px;
  font-size: 16px; line-height: 1.8;
}

.about-info-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 28px 0;
}

.about-info-item {
  display: flex; align-items: center; gap: 10px;
  font-size: 14px; color: var(--gray-300);
}

.about-info-item .info-icon { color: var(--primary); font-size: 14px; }

.about-social { display: flex; gap: 12px; margin-top: 24px; }

.about-social a {
  width: 46px; height: 46px; border-radius: 14px;
  background: rgba(var(--primary-rgb), 0.1);
  border: 1px solid rgba(var(--primary-rgb), 0.15);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary); font-size: 18px; transition: var(--transition);
}

.about-social a:hover {
  background: var(--gradient); color: var(--white);
  border-color: transparent; transform: translateY(-4px) scale(1.05);
}

/* ======== SKILLS ======== */
#skills {
  background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
  position: relative;
}

.skills-bg {
  position: absolute; inset: 0; opacity: 0.025;
  background-image: url('https://images.unsplash.com/photo-1558494949-ef010cbdcc31?auto=format&fit=crop&w=1920&q=80');
  background-size: cover; background-position: center;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 24px;
}

.skill-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 20px; padding: 30px;
  transition: var(--transition);
  position: relative; overflow: hidden;
}

.skill-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 3px; background: var(--gradient);
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.5s ease;
}

.skill-card:hover::before { transform: scaleX(1); }

.skill-card:hover {
  transform: translateY(-8px);
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(var(--primary-rgb), 0.2);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.3);
}

.skill-icon {
  width: 54px; height: 54px; border-radius: 16px;
  background: rgba(var(--primary-rgb), 0.1);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; margin-bottom: 16px; transition: var(--transition);
}

.skill-card:hover .skill-icon {
  background: var(--gradient); color: var(--white);
  transform: rotate(5deg) scale(1.1);
}

.skill-card h4 { font-size: 18px; font-weight: 600; color: var(--white); margin-bottom: 4px; }
.skill-card p { font-size: 13px; color: var(--gray-500); margin-bottom: 16px; }

.skill-bar { width: 100%; height: 6px; background: rgba(255, 255, 255, 0.06); border-radius: 8px; overflow: hidden; }

.skill-bar-fill {
  height: 100%; border-radius: 8px;
  background: var(--gradient);
  width: 0; transition: width 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.skill-bar-fill.animated { width: var(--skill-percent); }

.skill-label { display: flex; justify-content: space-between; margin-bottom: 8px; }
.skill-label span { font-size: 13px; color: var(--gray-400); }
.skill-label .skill-percent { color: var(--primary); font-weight: 600; }

/* ======== AI TOOLS ======== */
#ai-tools { background: var(--secondary); position: relative; }

#ai-tools::before {
  content: ''; position: absolute; top: -30%; right: -20%;
  width: 600px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, rgba(var(--primary-rgb), 0.04), transparent);
  pointer-events: none;
}

.ai-tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 20px;
}

.ai-tool-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 18px; padding: 28px 24px;
  text-align: center; transition: var(--transition); cursor: default;
  position: relative; overflow: hidden;
}

.ai-tool-card::after {
  content: ''; position: absolute; top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle, rgba(var(--primary-rgb), 0.03), transparent 60%);
  opacity: 0; transition: opacity 0.4s ease;
}

.ai-tool-card:hover::after { opacity: 1; }

.ai-tool-card:hover {
  transform: translateY(-6px);
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(var(--primary-rgb), 0.2);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.ai-tool-icon { font-size: 40px; margin-bottom: 14px; position: relative; z-index: 1; }
.ai-tool-card h4 { font-size: 16px; font-weight: 600; color: var(--white); margin-bottom: 4px; position: relative; z-index: 1; }
.ai-tool-card p { font-size: 13px; color: var(--gray-500); position: relative; z-index: 1; }

.ai-tool-badge {
  display: inline-block; font-size: 10px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 1px;
  color: var(--primary);
  background: rgba(var(--primary-rgb), 0.1);
  padding: 4px 14px; border-radius: 100px; margin-bottom: 12px;
  position: relative; z-index: 1;
}

/* ======== MODULES ======== */
#modules { background: linear-gradient(135deg, var(--secondary-light), var(--secondary)); position: relative; }

.modules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 24px;
}

.module-card {
  position: relative; border-radius: 20px; overflow: hidden;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  padding: 34px; transition: var(--transition); cursor: default;
}

.module-card:hover {
  transform: translateY(-8px);
  border-color: rgba(var(--primary-rgb), 0.2);
  box-shadow: var(--card-shadow-hover);
}

.module-icon {
  width: 58px; height: 58px; border-radius: 16px;
  background: rgba(var(--primary-rgb), 0.1);
  display: flex; align-items: center; justify-content: center;
  font-size: 24px; margin-bottom: 18px; transition: var(--transition);
}

.module-card:hover .module-icon {
  background: var(--gradient); color: var(--white);
  transform: scale(1.1) rotate(-5deg);
}

.module-card h4 { font-size: 20px; font-weight: 600; color: var(--white); margin-bottom: 10px; }
.module-card p { font-size: 14px; color: var(--gray-400); line-height: 1.7; }

.module-tag {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; color: var(--primary); margin-top: 16px; font-weight: 500;
}
.module-tag i { font-size: 12px; transition: var(--transition); }
.module-card:hover .module-tag i { transform: translateX(6px); }

/* ======== JOURNEY ======== */
#journey { background: var(--secondary); position: relative; overflow: hidden; }

#journey::before {
  content: ''; position: absolute; bottom: -30%; right: -10%;
  width: 500px; height: 500px; border-radius: 50%;
  background: radial-gradient(circle, rgba(var(--primary-rgb), 0.04), transparent);
}

.timeline {
  position: relative; max-width: 800px; margin: 0 auto; padding: 20px 0;
}

.timeline::before {
  content: ''; position: absolute; top: 0; bottom: 0; left: 24px;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary), rgba(var(--primary-rgb), 0.05));
}

.timeline-item {
  position: relative; padding-left: 68px; padding-bottom: 48px;
}

.timeline-item:last-child { padding-bottom: 0; }

.timeline-dot {
  position: absolute; left: 16px; top: 4px;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--primary);
  border: 4px solid var(--secondary);
  box-shadow: 0 0 0 2px var(--primary), 0 0 20px rgba(var(--primary-rgb), 0.3);
  z-index: 2;
}

.timeline-date {
  font-size: 13px; font-weight: 600; color: var(--primary);
  text-transform: uppercase; letter-spacing: 1px; margin-bottom: 6px;
}

.timeline-item h4 { font-size: 20px; font-weight: 600; color: var(--white); margin-bottom: 6px; }
.timeline-item p { font-size: 14px; color: var(--gray-400); line-height: 1.7; }

/* ======== PROJECTS ======== */
#projects {
  background: linear-gradient(135deg, var(--secondary-light), #0D1B2A);
  position: relative;
}

.project-filters {
  display: flex; justify-content: center; gap: 12px;
  flex-wrap: wrap; margin-bottom: 40px;
}

.filter-btn {
  padding: 11px 26px; font-size: 13px; font-weight: 600;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 100px; color: var(--gray-400);
  cursor: pointer; transition: var(--transition);
}

.filter-btn:hover, .filter-btn.active {
  background: var(--gradient); color: var(--white); border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(var(--primary-rgb), 0.3);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 28px;
}

.project-card {
  border-radius: 20px; overflow: hidden;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: var(--transition);
}

.project-card:hover {
  transform: translateY(-10px);
  border-color: rgba(var(--primary-rgb), 0.2);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.project-thumb {
  position: relative; aspect-ratio: 16/10; overflow: hidden;
}

.project-thumb img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.6s ease;
}

.project-card:hover .project-thumb img { transform: scale(1.08); }

.project-overlay {
  position: absolute; inset: 0;
  background: rgba(10, 22, 40, 0.8);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  gap: 16px; opacity: 0; transition: var(--transition);
}

.project-card:hover .project-overlay { opacity: 1; }

.project-overlay a {
  width: 52px; height: 52px; border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  display: flex; align-items: center; justify-content: center;
  color: var(--white); text-decoration: none; transition: var(--transition);
  transform: translateY(20px);
}

.project-card:hover .project-overlay a { transform: translateY(0); }
.project-card:hover .project-overlay a:last-child { transition-delay: 0.06s; }

.project-overlay a:hover {
  background: var(--gradient); border-color: transparent;
  transform: translateY(-3px) scale(1.1);
}

.project-info { padding: 26px; }

.project-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }

.project-tag {
  font-size: 11px; font-weight: 600; color: var(--primary);
  background: rgba(var(--primary-rgb), 0.1);
  padding: 4px 14px; border-radius: 100px;
}

.project-info h4 { font-size: 18px; font-weight: 600; color: var(--white); margin-bottom: 8px; }
.project-info p { font-size: 14px; color: var(--gray-400); line-height: 1.7; }

/* ======== SERVICES ======== */
#services { background: var(--secondary); }

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 24px;
}

.service-card {
  text-align: center; padding: 42px 30px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 20px; transition: var(--transition);
  position: relative; overflow: hidden;
}

.service-card::before {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0;
  height: 3px; background: var(--gradient);
  transform: scaleX(0); transition: transform 0.5s ease;
}

.service-card:hover::before { transform: scaleX(1); }

.service-card:hover {
  transform: translateY(-8px);
  border-color: rgba(var(--primary-rgb), 0.2);
  box-shadow: var(--card-shadow-hover);
}

.service-icon {
  width: 72px; height: 72px; border-radius: 20px;
  background: rgba(var(--primary-rgb), 0.1);
  display: flex; align-items: center; justify-content: center;
  font-size: 30px; margin: 0 auto 22px; transition: var(--transition);
}

.service-card:hover .service-icon {
  background: var(--gradient); color: var(--white);
  transform: scale(1.1) rotate(-5deg);
}

.service-card h4 { font-size: 20px; font-weight: 600; color: var(--white); margin-bottom: 12px; }
.service-card p { font-size: 14px; color: var(--gray-400); line-height: 1.7; }

/* ======== TESTIMONIALS ======== */
#testimonials {
  background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
  position: relative;
}

#testimonials::before {
  content: ''; position: absolute; top: -20%; left: -10%;
  width: 500px; height: 500px; border-radius: 50%;
  background: radial-gradient(circle, rgba(var(--primary-rgb), 0.04), transparent);
}

.testimonials-slider { max-width: 720px; margin: 0 auto; position: relative; overflow: hidden; }

.testimonials-track { display: flex; transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94); }

.testimonial-card {
  min-width: 100%; padding: 50px 40px; text-align: center;
}

.testimonial-quote { font-size: 56px; color: var(--primary); opacity: 0.2; margin-bottom: 16px; line-height: 1; }

.testimonial-text {
  font-size: 19px; color: var(--gray-200);
  line-height: 1.8; margin-bottom: 28px; font-style: italic;
}

.testimonial-author { display: flex; align-items: center; justify-content: center; gap: 16px; }

.testimonial-avatar {
  width: 60px; height: 60px; border-radius: 50%;
  background: var(--gradient);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; font-weight: 700; color: var(--white);
  box-shadow: 0 4px 16px rgba(var(--primary-rgb), 0.3);
}

.testimonial-name { font-size: 16px; font-weight: 600; color: var(--white); text-align: left; }
.testimonial-role { font-size: 13px; color: var(--gray-500); }

.testimonial-nav { display: flex; justify-content: center; gap: 10px; margin-top: 32px; }

.testimonial-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: rgba(255, 255, 255, 0.15); border: none;
  cursor: pointer; transition: var(--transition);
}

.testimonial-dot.active {
  background: var(--primary); width: 32px; border-radius: 10px;
}

/* ======== ACHIEVEMENTS ======== */
#achievements {
  background: linear-gradient(135deg, var(--secondary-light), var(--secondary));
  position: relative;
}

.achievements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 24px;
}

.achievement-card {
  text-align: center; padding: 38px 24px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 20px; transition: var(--transition);
  position: relative;
}

.achievement-card::after {
  content: ''; position: absolute; inset: -1px;
  border-radius: 20px;
  background: var(--gradient);
  opacity: 0; z-index: -1;
  transition: opacity 0.3s ease;
}

.achievement-card:hover::after { opacity: 1; }

.achievement-card:hover {
  transform: translateY(-6px);
  border-color: transparent;
}

.achievement-icon { font-size: 40px; margin-bottom: 16px; }

.achievement-number {
  font-size: 46px; font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.achievement-number .suffix { font-size: 26px; }

.achievement-label { font-size: 14px; color: var(--gray-400); margin-top: 8px; }

/* ======== CONTACT ======== */
#contact {
  background: linear-gradient(135deg, var(--secondary), #0D1B2A);
  position: relative; overflow: hidden;
}

#contact::before {
  content: ''; position: absolute; bottom: -20%; right: -10%;
  width: 600px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, rgba(var(--primary-rgb), 0.04), transparent);
  pointer-events: none;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: start;
}

.contact-info h3 { font-size: 30px; font-weight: 700; color: var(--white); margin-bottom: 16px; }
.contact-info > p { font-size: 16px; color: var(--gray-400); margin-bottom: 32px; line-height: 1.8; }

.contact-details { display: flex; flex-direction: column; gap: 20px; margin-bottom: 32px; }

.contact-detail-item { display: flex; align-items: flex-start; gap: 16px; }

.contact-detail-icon {
  width: 50px; height: 50px; min-width: 50px; border-radius: 16px;
  background: rgba(var(--primary-rgb), 0.1);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary); font-size: 18px;
}

.contact-detail-text h5 {
  font-size: 13px; font-weight: 600; color: var(--gray-500);
  text-transform: uppercase; letter-spacing: 1px; margin-bottom: 2px;
}
.contact-detail-text p { font-size: 15px; color: var(--gray-200); word-break: break-word; }

.contact-form {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 24px; padding: 40px;
}

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 22px; }

.form-group label {
  display: block; font-size: 13px; font-weight: 600;
  color: var(--gray-300); margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%; padding: 15px 20px; font-size: 15px;
  font-family: inherit; color: var(--white);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px; outline: none; transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(var(--primary-rgb), 0.12);
  background: rgba(255, 255, 255, 0.06);
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--gray-600); }

.form-group textarea { resize: vertical; min-height: 130px; }

.form-submit {
  width: 100%; padding: 17px; font-size: 16px; font-weight: 600;
  background: var(--gradient); color: var(--white);
  border: none; border-radius: 12px; cursor: pointer;
  transition: var(--transition);
  display: flex; align-items: center; justify-content: center; gap: 10px;
}

.form-submit:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 40px rgba(var(--primary-rgb), 0.4);
}

/* ======== WHATSAPP BUTTON ======== */
.whatsapp-float {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 999;
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  transition: var(--transition);
}

.whatsapp-tooltip {
  background: var(--white);
  color: var(--gray-800);
  padding: 10px 18px;
  border-radius: 12px;
  font-size: 13px;
  font-weight: 500;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  opacity: 0;
  transform: translateX(20px);
  transition: var(--transition);
  white-space: nowrap;
  position: relative;
}

.whatsapp-tooltip::after {
  content: '';
  position: absolute;
  right: -6px;
  top: 50%;
  transform: translateY(-50%);
  border-left: 6px solid var(--white);
  border-top: 6px solid transparent;
  border-bottom: 6px solid transparent;
}

.whatsapp-float:hover .whatsapp-tooltip {
  opacity: 1;
  transform: translateX(0);
}

.whatsapp-btn {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--whatsapp);
  color: var(--white);
  font-size: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 30px rgba(37, 211, 102, 0.4);
  transition: var(--transition);
  animation: whatsapp-pulse 2s infinite;
  position: relative;
}

.whatsapp-btn::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: rgba(37, 211, 102, 0.2);
  animation: whatsapp-ring 2s infinite;
}

@keyframes whatsapp-pulse {
  0%, 100% { transform: scale(1); box-shadow: 0 6px 30px rgba(37, 211, 102, 0.4); }
  50% { transform: scale(1.05); box-shadow: 0 8px 40px rgba(37, 211, 102, 0.6); }
}

@keyframes whatsapp-ring {
  0% { transform: scale(1); opacity: 0.6; }
  100% { transform: scale(1.4); opacity: 0; }
}

.whatsapp-float:hover .whatsapp-btn {
  transform: scale(1.1);
  box-shadow: 0 10px 40px rgba(37, 211, 102, 0.6);
  animation: none;
}

/* ======== FOOTER ======== */
footer {
  background: var(--secondary);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding: 70px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.footer-brand .nav-logo { margin-bottom: 16px; }
.footer-brand p { font-size: 14px; color: var(--gray-500); max-width: 320px; line-height: 1.9; }

.footer-col h5 {
  font-size: 14px; font-weight: 700; color: var(--white);
  text-transform: uppercase; letter-spacing: 1px; margin-bottom: 22px;
}

.footer-col ul li { margin-bottom: 12px; }

.footer-col ul li a {
  font-size: 14px; color: var(--gray-500); transition: var(--transition);
}

.footer-col ul li a:hover { color: var(--primary); padding-left: 5px; }

.footer-social { display: flex; gap: 12px; flex-wrap: wrap; }

.footer-social a {
  width: 44px; height: 44px; border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  display: flex; align-items: center; justify-content: center;
  color: var(--gray-400); font-size: 17px; transition: var(--transition);
}

.footer-social a:hover {
  background: var(--gradient); color: var(--white);
  border-color: transparent; transform: translateY(-4px) scale(1.05);
}

.footer-bottom {
  padding: 28px 0;
  display: flex; justify-content: space-between;
  align-items: center; flex-wrap: wrap; gap: 12px;
}

.footer-bottom p { font-size: 13px; color: var(--gray-500); }

/* ======== SCROLL ANIMATIONS ======== */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

.reveal-left { opacity: 0; transform: translateX(-40px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal-left.visible { opacity: 1; transform: translateX(0); }

.reveal-right { opacity: 0; transform: translateX(40px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal-right.visible { opacity: 1; transform: translateX(0); }

.reveal-scale { opacity: 0; transform: scale(0.85); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal-scale.visible { opacity: 1; transform: scale(1); }

/* ======== BACK TO TOP ======== */
.back-to-top {
  position: fixed; bottom: 30px; right: 100px;
  z-index: 998; width: 48px; height: 48px; border-radius: 50%;
  background: var(--gradient); color: var(--white);
  border: none; font-size: 18px; cursor: pointer;
  box-shadow: 0 4px 20px rgba(var(--primary-rgb), 0.3);
  opacity: 0; visibility: hidden;
  transform: translateY(20px); transition: var(--transition);
}

.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }

.back-to-top:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 40px rgba(var(--primary-rgb), 0.5);
}

/* ======== RESPONSIVE ======== */
@media (max-width: 1200px) {
  .container { max-width: 960px; }
}

@media (max-width: 992px) {
  .container { max-width: 720px; }

  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-image-wrapper { max-width: 400px; margin: 0 auto; }

  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }

  .section { padding: 90px 0; }
  .projects-grid { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
}

@media (max-width: 768px) {
  .container { max-width: 540px; }

  .nav-links {
    position: fixed; top: 0; right: -100%;
    width: 300px; height: 100vh;
    background: rgba(10, 22, 40, 0.98);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    flex-direction: column; align-items: flex-start;
    justify-content: center; padding: 60px 40px; gap: 26px;
    transition: right 0.4s ease;
    border-left: 1px solid rgba(255, 255, 255, 0.05);
  }

  .nav-links.open { right: 0; }
  .nav-links a { font-size: 20px; }
  .nav-cta { margin-left: 0; }

  .hamburger { display: flex; }

  .hero-slider-arrow { display: none; }

  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }

  .about-exp-badge { bottom: -10px; right: -10px; padding: 16px; }
  .about-exp-number { font-size: 28px; }

  .contact-form { padding: 24px; }
  .section { padding: 70px 0; }
  .section-header { margin-bottom: 44px; }

  .whatsapp-btn { width: 52px; height: 52px; font-size: 26px; }
  .whatsapp-tooltip { display: none; }
  .back-to-top { right: 24px; }
}

@media (max-width: 576px) {
  .hero-slide .hero-actions { flex-direction: column; }
  .hero-slide .hero-actions .btn { width: 100%; justify-content: center; }

  .hero-glass-sphere:nth-child(1) { width: 250px; height: 250px; }
  .hero-glass-sphere:nth-child(2) { width: 150px; height: 150px; }
  .hero-glass-sphere:nth-child(3) { width: 80px; height: 80px; }

  .about-info-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .achievements-grid { grid-template-columns: 1fr 1fr; }
  .projects-grid { grid-template-columns: 1fr; }

  .back-to-top {
    bottom: 20px; right: 20px;
    width: 40px; height: 40px; font-size: 16px;
  }

  .whatsapp-float { bottom: 20px; right: 20px; }
}

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--secondary); }
::-webkit-scrollbar-thumb { background: var(--gray-700); border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: var(--gray-600); }