:root {
  --color-primary: #0284c7;
  --color-secondary: #0ea5e9;
  --color-dark: #0f172a;
  --color-light: #f8fafc;
  --color-text: #1e293b;
  --color-muted: #64748b;
  --color-border: #e2e8f0;
  --color-wave: #0ea5e9;
  --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(2, 132, 199, 0.08);
  --shadow-lg: 0 20px 50px rgba(2, 132, 199, 0.15);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Montserrat', sans-serif;
  background: linear-gradient(135deg, #ffffff 0%, #f0f9ff 100%);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background 0.4s ease, color 0.4s ease;
}

/* Dark Mode Styles - Entire Page */
body.dark-mode {
  background: linear-gradient(135deg, #001f3f 0%, #003d5c 50%, #0a2a4a 100%);
  color: #f0f9ff;
}

body.dark-mode * {
  transition: background-color 0.4s ease, color 0.4s ease, border-color 0.4s ease;
}

body.dark-mode h1,
body.dark-mode h2,
body.dark-mode h3,
body.dark-mode h4,
body.dark-mode h5,
body.dark-mode h6 {
  color: #0ea5e9;
}

body.dark-mode p,
body.dark-mode a {
  color: #cbd5e1;
}

body.dark-mode a {
  color: #0ea5e9;
}

body.dark-mode a:hover {
  color: #38bdf8;
}

/* ===== NAVBAR ===== */
nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.7);
  border-bottom: 1px solid var(--color-border);
  padding: 0.8rem 0;
  transition: var(--transition);
}

nav.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-md);
  padding: 0.6rem 0;
}

.navbar-brand {
  font-family: 'Great Vibes', cursive;
  font-size: 2.2rem;
  font-weight: 700;
  background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: var(--transition);
  margin-right: 3rem;
  letter-spacing: 1px;
}

.navbar-brand:hover {
  background: linear-gradient(135deg, #0284c7 0%, #0ea5e9 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transform: scale(1.05);
}

.nav-link {
  color: var(--color-muted) !important;
  font-weight: 600;
  position: relative;
  transition: color 0.3s ease;
  margin: 0 0.8rem;
  font-size: 0.95rem;
  letter-spacing: 0.3px;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link:hover {
  color: var(--color-primary) !important;
}

/* Custom Mobile Toggle */
.navbar-toggler {
  border: none;
  padding: 0.5rem;
  position: relative;
  width: 50px;
  height: 50px;
}

.navbar-toggler:focus {
  box-shadow: 0 0 15px rgba(2, 132, 199, 0.2);
}

.navbar-toggler-icon {
  display: block;
  position: relative;
  width: 28px;
  height: 20px;
  background: transparent;
}

.navbar-toggler-icon::before,
.navbar-toggler-icon::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 2.5px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: all 0.4s cubic-bezier(0.68, -0.55, 0.27, 1.55);
  left: 0;
}

.navbar-toggler-icon::before {
  top: 0;
}

.navbar-toggler-icon::after {
  bottom: 0;
}

.navbar-toggler-icon span {
  display: block;
  position: absolute;
  width: 100%;
  height: 2.5px;
  background: var(--color-primary);
  border-radius: 2px;
  top: 50%;
  transform: translateY(-50%);
  transition: all 0.4s cubic-bezier(0.68, -0.55, 0.27, 1.55);
  left: 0;
}

.navbar-toggler[aria-expanded="true"] .navbar-toggler-icon::before {
  transform: rotate(45deg) translateY(10px);
  width: 85%;
}

.navbar-toggler[aria-expanded="true"] .navbar-toggler-icon::after {
  transform: rotate(-45deg) translateY(-10px);
  width: 85%;
}

.navbar-toggler[aria-expanded="true"] .navbar-toggler-icon span {
  opacity: 0;
  transform: rotate(180deg) translateY(-50%);
}

/* Dark Mode Toggle Button */
.dark-mode-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-primary);
  font-size: 1.4rem;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
}

.dark-mode-toggle:hover {
  transform: scale(1.2);
  color: var(--color-secondary);
}

/* Desktop Version - Inside nav */
.dark-mode-toggle-desktop {
  margin-left: 1.5rem;
  font-size: 1.4rem;
}

/* Mobile Version - In controls */
.dark-mode-toggle-mobile {
  margin-left: 0;
  display: flex;
}

.dark-mode-item {
  display: none;
}

/* Navbar Controls Container */
.navbar-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

@media (max-width: 991px) {
  .dark-mode-toggle-desktop {
    display: none;
  }

  .dark-mode-toggle-mobile {
    display: flex;
    font-size: 1.3rem;
  }

  .dark-mode-item {
    display: none;
  }

  .navbar-controls {
    gap: 0.75rem;
  }
}

@media (min-width: 992px) {
  .dark-mode-toggle-mobile {
    display: none;
  }

  .dark-mode-toggle-desktop {
    display: flex;
  }

  .dark-mode-item {
    display: list-item;
  }

  .navbar-controls {
    gap: 0.5rem;
  }
}

body.dark-mode .dark-mode-toggle {
  color: #0ea5e9;
}

body.dark-mode .dark-mode-toggle:hover {
  color: #38bdf8;
  transform: scale(1.2) rotate(20deg);
}

/* Dark Mode - Navbar */
body.dark-mode nav {
  background: rgba(15, 23, 42, 0.9);
  border-bottom-color: rgba(14, 165, 233, 0.3);
}

body.dark-mode nav.scrolled {
  background: rgba(15, 23, 42, 0.98);
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.2);
}

body.dark-mode .nav-link {
  color: #cbd5e1 !important;
}

body.dark-mode .nav-link:hover {
  color: #0ea5e9 !important;
}

body.dark-mode .navbar-toggler-icon::before,
body.dark-mode .navbar-toggler-icon::after,
body.dark-mode .navbar-toggler-icon span {
  background: #0ea5e9;
}

/* Dark Mode - All Cards */
body.dark-mode .skill-card,
body.dark-mode .certification-card,
body.dark-mode .project-card,
body.dark-mode .stat-card {
  background: rgba(15, 23, 42, 0.8);
  border-color: rgba(14, 165, 233, 0.3);
  color: #f0f9ff;
}

body.dark-mode .skill-card:hover,
body.dark-mode .certification-card:hover,
body.dark-mode .project-card:hover,
body.dark-mode .stat-card:hover {
  border-color: #0ea5e9;
  background: rgba(14, 165, 233, 0.15);
}

body.dark-mode .skill-name,
body.dark-mode .cert-name,
body.dark-mode .stat-number {
  color: #ffffff;
}

body.dark-mode .section-title,
body.dark-mode .certifications-title {
  color: #ffffff;
}

body.dark-mode .skill-level,
body.dark-mode .cert-issuer,
body.dark-mode .cert-year,
body.dark-mode .stat-label {
  color: #cbd5e1;
}

/* Dark Mode - Sections */
body.dark-mode .section {
  background-color: transparent;
}

body.dark-mode .projects {
  background: linear-gradient(135deg, rgba(0, 31, 63, 0.5) 0%, rgba(10, 42, 74, 0.5) 100%);
}

body.dark-mode .skills {
  background: linear-gradient(135deg, rgba(0, 31, 63, 0.5) 0%, rgba(10, 42, 74, 0.5) 100%);
}

body.dark-mode .certifications {
  background: linear-gradient(135deg, rgba(0, 31, 63, 0.5) 0%, rgba(10, 42, 74, 0.5) 100%);
}

body.dark-mode .stats {
  background: linear-gradient(135deg, rgba(0, 31, 63, 0.7) 0%, rgba(10, 42, 74, 0.7) 100%);
}

body.dark-mode .hero {
  background: linear-gradient(135deg, rgba(0, 31, 63, 0.3) 0%, rgba(10, 42, 74, 0.3) 100%);
}

/* Dark Mode - Footer */
body.dark-mode footer {
  background: linear-gradient(90deg, rgba(15, 23, 42, 0.95) 0%, rgba(10, 42, 74, 0.95) 100%);
  border-top-color: rgba(14, 165, 233, 0.2);
}

body.dark-mode footer h2 {
  color: #0ea5e9;
}

body.dark-mode .footer-social a {
  color: #0ea5e9;
}

body.dark-mode .footer-social a:hover {
  color: #38bdf8;
}

/* Dark Mode - Hero Section */
body.dark-mode .hero-content h1 {
  color: #f0f9ff;
}

body.dark-mode .gradient-text {
  color: #0ea5e9;
}

body.dark-mode .hero-content p,
body.dark-mode .subtitle {
  color: #cbd5e1;
}

body.dark-mode .badge-title {
  color: #0ea5e9;
}

body.dark-mode .social-links a {
  border-color: rgba(14, 165, 233, 0.5);
  background: rgba(14, 165, 233, 0.1);
  color: #0ea5e9;
}

body.dark-mode .social-links a:hover {
  background: #0ea5e9;
  color: #001f3f;
  border-color: #0ea5e9;
}

/* Dark Mode - Buttons */
body.dark-mode .btn-primary-hero {
  background: #0ea5e9;
  color: #001f3f;
  border-color: #0ea5e9;
}

body.dark-mode .btn-primary-hero:hover {
  background: #38bdf8;
  border-color: #38bdf8;
}

body.dark-mode .btn-secondary-hero {
  color: #0ea5e9;
  border-color: #0ea5e9;
  background: transparent;
}

body.dark-mode .btn-secondary-hero:hover {
  background: rgba(14, 165, 233, 0.1);
  border-color: #38bdf8;
  color: #38bdf8;
}

/* Dark Mode - Input/Form Elements */
body.dark-mode input,
body.dark-mode textarea {
  background: rgba(15, 23, 42, 0.8);
  color: #f0f9ff;
  border-color: rgba(14, 165, 233, 0.3);
}

body.dark-mode input:focus,
body.dark-mode textarea:focus {
  border-color: #0ea5e9;
  background: rgba(15, 23, 42, 0.95);
}

/* ===== ABOUT SECTION ===== */
.section {
  padding: 100px 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 3rem;
  text-align: center;
  position: relative;
  color: var(--color-text);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: 2px;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
  margin-top: 3rem;
}

.about-text h2 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--color-primary);
}

.about-text p {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--color-muted);
  margin-bottom: 1.5rem;
}

.skills-showcase {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.skill-item {
  background: white;
  padding: 1.5rem;
  border-radius: 12px;
  border-left: 4px solid var(--color-primary);
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.skill-item:hover {
  transform: translateX(8px);
  box-shadow: var(--shadow-md);
}

.skill-item h3 {
  color: var(--color-primary);
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.skill-item p {
  font-size: 0.95rem;
  color: var(--color-muted);
}

@media (max-width: 991px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .skills-showcase {
    grid-template-columns: 1fr;
  }
}

/* ===== HERO SECTION ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #ffffff 0%, #f0f9ff 100%);
  position: relative;
  overflow: hidden;
  padding: 60px 20px 80px;
}

/* Wave animations - bottom */
.hero::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -100%;
  width: 400%;
  height: 220px;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 120" preserveAspectRatio="none"><defs><pattern id="wave2" x="0" y="0" width="1200" height="120" patternUnits="userSpaceOnUse"><path d="M0,50 Q300,0 600,50 T1200,50 L1200,120 L0,120 Z" fill="%230ea5e9" opacity="0.15"/></pattern></defs><rect width="1200" height="120" fill="url(%23wave2)"/></svg>');
  background-repeat: repeat-x;
  background-size: 1200px 100%;
  animation: wave 18s linear infinite reverse;
  opacity: 0.6;
  z-index: 1;
}

@keyframes wave {
  0% { transform: translateX(0); }
  100% { transform: translateX(1200px); }
}

.hero::before,
.hero::after {
  filter: drop-shadow(0 0 15px rgba(14, 165, 233, 0.3));
}

/* Shimmer effect for sea */
@keyframes shimmer {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 0.9; }
}

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

.hero .row {
  display: flex;
  align-items: center;
  width: 100%;
  gap: 2rem;
}

/* Shimmering water effect */
.hero-water-shimmer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(14, 165, 233, 0.1) 0%, transparent 50%),
              radial-gradient(ellipse at 80% 80%, rgba(14, 165, 233, 0.08) 0%, transparent 50%);
  animation: shimmer 4s ease-in-out infinite;
}

@media (min-width: 992px) {
  .hero .col-lg-6 {
    display: flex;
    flex-direction: column;
    justify-content: center;
    flex: 1;
  }
}

.hero-content {
  position: relative;
  z-index: 3;
}

.hero-content h1 {
  font-size: clamp(2.2rem, 8vw, 3.4rem);
  font-weight: 800;
  margin-bottom: 15px;
  color: var(--color-text);
  letter-spacing: -1px;
  line-height: 1.2;
  animation: fadeInUp 0.8s ease-out;
}

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

.hero-content .badge-title {
  display: inline-block;
  background: rgba(2, 132, 199, 0.1);
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
  padding: 8px 16px;
  border-radius: 25px;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 20px;
  animation: fadeInUp 0.8s ease-out 0.1s backwards;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.hero-content .subtitle {
  font-size: clamp(1rem, 3vw, 1.3rem);
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 20px;
  animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.hero-content p {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--color-muted);
  max-width: 500px;
  margin-bottom: 30px;
  animation: fadeInUp 0.8s ease-out 0.3s backwards;
}

.hero-cta {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

.btn-primary-hero {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  border: none;
  padding: 14px 32px;
  border-radius: 8px;
  font-weight: 700;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.btn-primary-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.2);
  transition: left 0.3s ease;
  z-index: -1;
}

.btn-primary-hero:hover::before {
  left: 100%;
}

.btn-primary-hero:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 40px rgba(2, 132, 199, 0.3);
  color: white;
}

.btn-secondary-hero {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  padding: 12px 30px;
  border-radius: 8px;
  font-weight: 700;
  transition: all 0.3s ease;
}

.btn-secondary-hero:hover {
  background: var(--color-primary);
  color: white;
  transform: translateY(-3px);
  box-shadow: 0 15px 40px rgba(2, 132, 199, 0.2);
}

.social-links {
  display: flex;
  gap: 15px;
  animation: fadeInUp 0.8s ease-out 0.5s backwards;
  margin-top: 30px;
  justify-content: center;
}

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 45px;
  height: 45px;
  background: rgba(2, 132, 199, 0.1);
  border: 2px solid var(--color-primary);
  border-radius: 50%;
  color: var(--color-primary);
  transition: all 0.3s ease;
  font-size: 1.2rem;
}

.social-links a:hover {
  background: var(--color-primary);
  color: white;
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(2, 132, 199, 0.2);
}

@media (min-width: 992px) {
  .social-links {
    justify-content: flex-start;
  }
}

/* Hero Image */
.hero-img-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  height: 100%;
}

.hero-img-box {
  width: 340px;
  height: 340px;
  border-radius: 20px;
  overflow: hidden;
  border: 4px solid var(--color-wave);
  box-shadow: 0 25px 60px rgba(14, 165, 233, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}

.hero-img-box::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent 30%, rgba(14, 165, 233, 0.15) 50%, transparent 70%);
  animation: shine 3s infinite;
}

@keyframes shine {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.hero-img-box img {
  display: block;
  margin: auto;
  max-width: 90%;
  max-height: 90%;
  object-fit: contain;
  position: relative;
  z-index: 2;
}

@media (max-width: 991px) {
  .hero {
    padding: 100px 20px 60px;
  }

  .hero-img-wrapper {
    order: -1;
    height: auto;
    min-height: 380px;
    margin-bottom: 30px;
  }

  .hero-cta {
    justify-content: center;
  }

  .hero-content {
    text-align: center;
  }
}

/* ===== STATS SECTION ===== */
.stats {
  background: linear-gradient(90deg, #f8fafc 0%, #f0f9ff 100%);
  padding: 60px 20px;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.stat-item {
  text-align: center;
  padding: 20px;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.stat-label {
  font-size: 1rem;
  color: var(--color-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ===== FEATURED PROJECTS ===== */
.projects {
  padding: 100px 20px;
  background: linear-gradient(135deg, #ffffff 0%, #f0f9ff 100%);
}

.featured-section-title {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 50px;
  text-align: center;
  position: relative;
  padding-bottom: 20px;
  color: var(--color-text);
}

.featured-section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), transparent 100%);
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-bottom: 50px;
}

.project-card {
  background: white;
  border-radius: 15px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: var(--transition);
  cursor: pointer;
  position: relative;
  height: 100%;
  box-shadow: var(--shadow-sm);
}

.project-card:hover {
  transform: translateY(-8px);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
}

.project-image {
  position: relative;
  height: 200px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
}

.project-image::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(2, 132, 199, 0.1) 0%, transparent 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.project-card:hover .project-image::after {
  opacity: 1;
}

.project-content {
  padding: 25px;
}

.project-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 10px;
}

.project-description {
  font-size: 0.95rem;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 15px;
}

.project-tech {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 15px;
}

.tech-tag {
  background: rgba(2, 132, 199, 0.1);
  color: var(--color-primary);
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid var(--color-border);
}

.project-link {
  display: inline-block;
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  position: relative;
}

.project-link::after {
  content: ' →';
  display: inline-block;
  transition: transform 0.3s ease;
}

.project-card:hover .project-link::after {
  transform: translateX(5px);
}

/* ===== SKILLS SECTION ===== */
.skills {
  background: linear-gradient(135deg, #f8fafc 0%, #f0f9ff 100%);
  padding: 100px 20px;
}

.skills-section-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 3rem;
  text-align: center;
  position: relative;
  color: var(--color-text);
  padding-bottom: 15px;
}

.skills-section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: 2px;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-top: 50px;
}

.skill-card {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 30px;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

.skill-card:hover {
  border-color: var(--color-primary);
  background: rgba(2, 132, 199, 0.02);
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
}

.skill-icon {
  font-size: 3rem;
  margin-bottom: 15px;
  color: var(--color-primary);
  transition: transform 0.3s ease;
}

.skill-card:hover .skill-icon {
  transform: scale(1.15) rotate(10deg);
}

.skill-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 10px;
}

.skill-level {
  color: var(--color-muted);
  font-size: 0.9rem;
}

/* ===== CERTIFICATIONS SECTION ===== */
.certifications {
  background: linear-gradient(135deg, #ffffff 0%, #f0f9ff 100%);
  padding: 100px 20px;
}

.certifications-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 3rem;
  text-align: center;
  position: relative;
  color: var(--color-text);
  padding-bottom: 15px;
}

.certifications-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: 2px;
}

.certifications-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-top: 50px;
}

.certification-card {
  background: white;
  border: 2px solid var(--color-border);
  border-radius: 12px;
  padding: 30px;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.certification-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
}

.certification-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
}

.cert-icon {
  font-size: 2.4rem;
  color: #0aa4c7;
  margin-bottom: 10px;
  transition: color 0.3s ease;
}

.certification-card:hover .cert-icon {
  color: #087fa1;
}

.cert-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.cert-issuer {
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 10px;
}

.cert-year {
  color: var(--color-muted);
  font-size: 0.85rem;
}

/* ===== FOOTER ===== */
footer {
  background: linear-gradient(90deg, #f8fafc 0%, #ffffff 100%);
  border-top: 1px solid var(--color-border);
  padding: 60px 20px 30px;
  text-align: center;
  color: var(--color-muted);
}

.footer-content {
  max-width: 600px;
  margin: 0 auto 40px;
}

.footer-content h2 {
  color: var(--color-text);
}

.footer-content p {
  color: var(--color-muted);
}

.footer-cta {
  margin: 30px 0;
}

.footer-social {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin: 30px 0;
}

.footer-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background: rgba(2, 132, 199, 0.1);
  border: 2px solid var(--color-primary);
  border-radius: 50%;
  color: var(--color-primary);
  transition: all 0.3s ease;
  font-size: 1.3rem;
}

.footer-social a:hover {
  background: var(--color-primary);
  color: white;
  transform: translateY(-8px);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 30px;
  font-size: 0.9rem;
}

/* ===== SCROLL ANIMATIONS ===== */
[data-aos] {
  opacity: 0;
}

[data-aos].aos-animate {
  opacity: 1;
}

/* ===== UTILITIES ===== */
.gradient-text {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Smooth scrollbar */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--color-light);
}

::-webkit-scrollbar-thumb {
  background: var(--color-primary);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-secondary);
}