/* ===== Reset & Variables ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --primary: #1a56db;
  --primary-dark: #1243af;
  --primary-light: #e8f0fe;
  --accent: #059669;
  --accent-light: #d1fae5;
  --white: #ffffff;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 15px rgba(0,0,0,.1), 0 4px 6px rgba(0,0,0,.05);
  --shadow-xl: 0 20px 25px rgba(0,0,0,.1), 0 10px 10px rgba(0,0,0,.04);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-full: 9999px;
}
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--gray-50);
  color: var(--gray-800);
  line-height: 1.6;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
.container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }

/* ===== Section Common ===== */
section { padding: 96px 0; }
.section-label {
  display: inline-block; font-size: .8rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 1.5px;
  color: var(--primary); margin-bottom: 8px;
}
.section-title {
  font-size: 2.25rem; font-weight: 800; color: var(--gray-900);
  margin-bottom: 16px; line-height: 1.2;
}
.section-title span { color: var(--primary); }
.section-sub {
  font-size: 1.1rem; color: var(--gray-500);
  max-width: 600px; line-height: 1.7;
}
.section-header { text-align: center; margin-bottom: 56px; }
.section-header .section-sub { margin: 0 auto; }

/* ===== Navbar ===== */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(0,0,0,.06);
  transition: transform .3s ease;
}
nav.hidden { transform: translateY(-100%); }
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px; max-width: 1140px; margin: 0 auto; padding: 0 24px;
}
.logo {
  font-weight: 800; font-size: 1.35rem;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.nav-links { display: flex; gap: 6px; align-items: center; }
.nav-links a {
  padding: 8px 14px; border-radius: var(--radius-sm);
  font-size: .875rem; font-weight: 500; color: var(--gray-600);
  transition: all .2s;
}
.nav-links a:hover { background: var(--primary-light); color: var(--primary); }
.nav-cta {
  background: var(--primary) !important;
  color: var(--white) !important;
  border-radius: var(--radius-full) !important;
  padding: 8px 18px !important;
}
.nav-cta:hover { background: var(--primary-dark) !important; }
.hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.hamburger span {
  display: block; width: 24px; height: 2px;
  background: var(--gray-700); border-radius: 2px;
  transition: all .3s;
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }
.mobile-menu {
  display: none; position: fixed; top: 68px; left: 0; right: 0;
  background: var(--white); padding: 16px 24px 24px;
  border-bottom: 1px solid var(--gray-200);
  box-shadow: var(--shadow-lg); z-index: 999;
}
.mobile-menu.open { display: block; }
.mobile-menu a {
  display: block; padding: 10px 0; font-size: .95rem;
  font-weight: 500; color: var(--gray-700);
  border-bottom: 1px solid var(--gray-100);
}
.mobile-menu a:last-child { border-bottom: none; }

/* ===== Hero ===== */
.hero {
  min-height: 100vh; display: flex; align-items: center;
  padding-top: 68px; position: relative; overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(26,86,219,.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 50%, rgba(5,150,105,.06) 0%, transparent 50%);
}
.hero .container { position: relative; z-index: 1; }
.hero-content { max-width: 720px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--primary-light); color: var(--primary);
  padding: 8px 18px; border-radius: var(--radius-full);
  font-size: .85rem; font-weight: 600; margin-bottom: 24px;
}
.hero-badge i { font-size: .9rem; }
.hero h1 {
  font-size: 3.5rem; font-weight: 800; line-height: 1.1;
  color: var(--gray-900); margin-bottom: 20px;
}
.hero h1 span {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p {
  font-size: 1.2rem; color: var(--gray-500);
  max-width: 560px; line-height: 1.8; margin-bottom: 32px;
}
.hero-buttons { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 30px; border-radius: var(--radius-sm);
  font-weight: 600; font-size: .95rem;
  transition: all .25s; cursor: pointer; border: none;
}
.btn-primary {
  background: var(--primary); color: var(--white);
  box-shadow: 0 4px 14px rgba(26,86,219,.35);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(26,86,219,.4); }
.btn-outline {
  background: transparent; color: var(--gray-700);
  border: 2px solid var(--gray-200);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-accent {
  background: var(--accent); color: var(--white);
  box-shadow: 0 4px 14px rgba(5,150,105,.3);
}
.btn-accent:hover { background: #047857; transform: translateY(-2px); }
.hero-stats {
  display: flex; gap: 40px; margin-top: 48px;
  padding-top: 32px; border-top: 1px solid var(--gray-200);
}
.hero-stat h3 { font-size: 1.75rem; font-weight: 800; color: var(--primary); }
.hero-stat p { font-size: .85rem; color: var(--gray-500); margin-bottom: 0; }

/* ===== About ===== */
.about-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
}
.about-visual { position: relative; }
.about-img {
  width: 100%; border-radius: var(--radius); object-fit: cover;
  box-shadow: var(--shadow-lg);
}
.about-card {
  background: var(--white); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow-lg);
  margin-top: -60px; margin-left: 20px; position: relative; z-index: 2;
  border: 1px solid var(--gray-100);
}
.about-card h3 {
  font-size: 1.25rem; font-weight: 700; margin-bottom: 10px;
  color: var(--gray-900);
}
.about-card h3 i { color: var(--primary); margin-right: 8px; }
.about-card p { font-size: .9rem; color: var(--gray-500); line-height: 1.7; }
.about-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.about-tags span {
  background: var(--primary-light); color: var(--primary);
  padding: 6px 14px; border-radius: var(--radius-full);
  font-size: .78rem; font-weight: 500;
}
.about-text h2 { font-size: 2rem; font-weight: 800; margin-bottom: 20px; }
.about-text h2 span { color: var(--primary); }
.about-text p { color: var(--gray-500); margin-bottom: 16px; line-height: 1.8; }
.about-info { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 24px; }
.about-info-item { display: flex; gap: 12px; align-items: center; }
.about-info-icon {
  width: 42px; height: 42px; border-radius: 50%;
  background: var(--primary-light); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; flex-shrink: 0;
}
.about-info-item strong { font-size: .85rem; }
.about-info-item span { font-size: .82rem; color: var(--gray-500); }

/* ===== Skills ===== */
#skills { background: var(--white); }
.skills-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.skill-card {
  background: var(--gray-50); border-radius: var(--radius);
  padding: 24px; transition: all .3s; border: 1px solid transparent;
}
.skill-card:hover { border-color: var(--primary); transform: translateY(-4px); box-shadow: var(--shadow-md); }
.skill-icon {
  width: 48px; height: 48px; border-radius: var(--radius-sm);
  background: var(--primary-light); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; margin-bottom: 14px;
}
.skill-card h4 { font-size: 1rem; font-weight: 700; margin-bottom: 6px; }
.skill-card p { font-size: .85rem; color: var(--gray-500); }
.skill-bar { margin-top: 14px; height: 6px; background: var(--gray-200); border-radius: 4px; overflow: hidden; }
.skill-bar-fill { height: 100%; border-radius: 4px; width: 0; transition: width 1s ease; }
.skill-bar-fill.blue { background: linear-gradient(90deg, var(--primary), #3b82f6); }
.skill-bar-fill.green { background: linear-gradient(90deg, var(--accent), #10b981); }

/* ===== Services ===== */
.services-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 24px;
}
.service-card {
  background: var(--white); border-radius: var(--radius);
  padding: 32px; box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-100);
  transition: all .3s; display: block;
  color: inherit; text-decoration: none;
}
.service-card:hover { border-color: var(--primary); box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.service-card h3 { color: var(--gray-800); }
.service-icon {
  width: 56px; height: 56px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; margin-bottom: 18px;
}
.service-icon.blue { background: var(--primary-light); color: var(--primary); }
.service-icon.green { background: var(--accent-light); color: var(--accent); }
.service-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; }
.service-card p { font-size: .9rem; color: var(--gray-500); line-height: 1.7; }
.service-card ul { list-style: none; margin-top: 14px; }
.service-card ul li {
  position: relative; padding-left: 22px; margin-bottom: 6px;
  font-size: .85rem; color: var(--gray-600);
}
.service-card ul li::before {
  content: '\2713'; position: absolute; left: 0;
  color: var(--accent); font-weight: 700;
}

/* ===== Carousel ===== */
.carousel-container {
  position: relative; overflow: hidden; padding: 0 50px;
}
.carousel-track {
  display: flex; gap: 24px; transition: transform .5s ease; will-change: transform;
}
.carousel-slide { min-width: calc(33.333% - 16px); flex-shrink: 0; }
.project-card {
  border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--gray-100);
  transition: all .3s; background: var(--white); height: 100%;
}
.project-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.project-img { height: 200px; overflow: hidden; }
.project-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.project-card:hover .project-img img { transform: scale(1.08); }
.project-body { padding: 24px 28px 28px; }
.project-tag {
  display: inline-block; font-size: .7rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: .5px;
  color: var(--primary); background: var(--primary-light);
  padding: 3px 10px; border-radius: var(--radius-full); margin-bottom: 10px;
}
.project-body h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
.project-body p { font-size: .85rem; color: var(--gray-500); line-height: 1.7; margin-bottom: 14px; }
.project-body a {
  font-size: .85rem; font-weight: 600; color: var(--primary);
  display: inline-flex; align-items: center; gap: 4px;
}
.project-body a:hover { gap: 8px; }
.carousel-btn {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--white); border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-md); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: var(--gray-700); font-size: 1rem;
  transition: all .2s; z-index: 10;
}
.carousel-btn:hover { background: var(--primary); color: var(--white); border-color: var(--primary); }
.carousel-prev { left: 0; }
.carousel-next { right: 0; }
.carousel-dots {
  display: flex; justify-content: center; gap: 8px; margin-top: 24px;
}
.carousel-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--gray-300); border: none; cursor: pointer;
  transition: all .2s;
}
.carousel-dot.active { background: var(--primary); width: 28px; border-radius: 5px; }

/* ===== Certifications ===== */
#certifications { background: var(--white); }
.certs-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.cert-card {
  background: var(--gray-50); border-radius: var(--radius);
  padding: 24px; border: 1px solid var(--gray-100);
  display: flex; gap: 16px; align-items: flex-start;
  transition: all .3s;
}
.cert-card:hover { border-color: var(--accent); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.cert-badge {
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--accent-light); color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; flex-shrink: 0;
}
.cert-card h4 { font-size: .95rem; font-weight: 700; margin-bottom: 4px; }
.cert-card p { font-size: .8rem; color: var(--gray-500); }

/* ===== Contact ===== */
#contact {
  background: linear-gradient(135deg, var(--gray-900), #0f172a);
  color: var(--white);
}
#contact .section-title { color: var(--white); }
#contact .section-title span { color: #60a5fa; }
.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px;
}
.contact-info h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 16px; }
.contact-info > p { color: var(--gray-400); margin-bottom: 28px; line-height: 1.7; }
.contact-item {
  display: flex; gap: 14px; align-items: center; margin-bottom: 18px;
}
.contact-item-icon {
  width: 44px; height: 44px; border-radius: 50%;
  background: rgba(255,255,255,.08);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; flex-shrink: 0;
  color: #60a5fa;
}
.contact-item h4 { font-size: .85rem; font-weight: 600; margin-bottom: 2px; color: var(--white); }
.contact-item p { font-size: .85rem; color: var(--gray-400); }
.contact-actions { margin-top: 28px; }
.contact-form { display: flex; flex-direction: column; gap: 14px; }
.contact-form input,
.contact-form textarea {
  padding: 14px 16px; border-radius: var(--radius-sm);
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06);
  color: var(--white); font-family: inherit; font-size: .9rem;
  transition: all .2s; outline: none;
}
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: var(--gray-400); }
.contact-form input:focus,
.contact-form textarea:focus { border-color: #60a5fa; background: rgba(255,255,255,.1); }
.contact-form textarea { min-height: 120px; resize: vertical; }

/* ===== Footer ===== */
footer {
  background: var(--gray-900); border-top: 1px solid rgba(255,255,255,.06);
  padding: 28px 0; text-align: center;
}
footer p { font-size: .85rem; color: var(--gray-500); }

/* ===== WhatsApp FAB ===== */
.whatsapp-fab {
  position: fixed; bottom: 24px; right: 24px; z-index: 999;
  width: 60px; height: 60px; border-radius: 50%;
  background: #25d366; color: var(--white);
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem; box-shadow: 0 4px 16px rgba(37,211,102,.4);
  transition: all .3s; animation: whatsappPulse 2s infinite;
}
.whatsapp-fab:hover {
  transform: scale(1.1); box-shadow: 0 6px 24px rgba(37,211,102,.5);
}
@keyframes whatsappPulse {
  0% { box-shadow: 0 4px 16px rgba(37,211,102,.4); }
  50% { box-shadow: 0 4px 28px rgba(37,211,102,.6); }
  100% { box-shadow: 0 4px 16px rgba(37,211,102,.4); }
}

/* ===== Animations ===== */
.fade-in { opacity: 0; transform: translateY(30px); transition: all .6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }
.fade-in-left { opacity: 0; transform: translateX(-30px); transition: all .6s ease; }
.fade-in-left.visible { opacity: 1; transform: translateX(0); }
.fade-in-right { opacity: 0; transform: translateX(30px); transition: all .6s ease; }
.fade-in-right.visible { opacity: 1; transform: translateX(0); }
.stagger > * { opacity: 0; transform: translateY(20px); }
.stagger.visible > * { animation: staggerFade .4s ease forwards; }
@keyframes staggerFade {
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .carousel-slide { min-width: calc(50% - 12px); }
}
@media (max-width: 768px) {
  section { padding: 64px 0; }
  .hamburger { display: flex; }
  .nav-links { display: none; }
  .hero h1 { font-size: 2.4rem; }
  .hero p { font-size: 1.05rem; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }
  .hero-stat h3 { font-size: 1.4rem; }
  .section-title { font-size: 1.75rem; }
  .about-info { grid-template-columns: 1fr; }
  .about-card { margin-top: -30px; margin-left: 10px; padding: 20px; }
  .services-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
  .certs-grid { grid-template-columns: 1fr; }
  .carousel-slide { min-width: calc(100% - 0px); }
  .carousel-container { padding: 0 40px; }
}
@media (max-width: 480px) {
  .hero h1 { font-size: 1.9rem; }
  .container { padding: 0 16px; }
  .btn { padding: 12px 22px; font-size: .85rem; }
  .carousel-container { padding: 0 36px; }
  .whatsapp-fab { width: 52px; height: 52px; font-size: 1.6rem; bottom: 16px; right: 16px; }
}