/* Variables & Design System */
:root {
  /* Colors */
  --bg-color: #0f172a;
  --bg-secondary: #1e293b;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent-primary: #38bdf8;
  --accent-secondary: #818cf8;
  --gradient-main: linear-gradient(135deg, #38bdf8 0%, #818cf8 100%);

  /* Typography */
  --font-heading: "Outfit", sans-serif;
  --font-body: "Inter", sans-serif;

  /* Spacing */
  --container-width: 1200px;
  --header-height: 80px;

  /* Effects */
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
    0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --glass-bg: rgba(30, 41, 59, 0.7);
  --glass-border: 1px solid rgba(255, 255, 255, 0.1);
  --radius-md: 12px;
  --radius-lg: 24px;
}

/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

/* Utilities */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 2rem;
}

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

.section {
  padding: 5rem 0;
}

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

/* Buttons */
.btn-primary,
.btn-secondary {
  display: inline-block;
  padding: 0.8rem 2rem;
  border-radius: 50px;
  font-weight: 600;
  font-family: var(--font-heading);
  cursor: pointer;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.btn-primary {
  background: var(--gradient-main);
  color: white;
  box-shadow: 0 4px 15px rgba(56, 189, 248, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(56, 189, 248, 0.4);
}

.btn-secondary {
  background: transparent;
  border: 2px solid var(--accent-primary);
  color: var(--accent-primary);
  margin-left: 1rem;
}

.btn-secondary:hover {
  background: rgba(56, 189, 248, 0.1);
  transform: translateY(-2px);
}

.btn-primary.small {
  padding: 0.5rem 1.5rem;
  font-size: 0.9rem;
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: var(--glass-border);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a:not(.btn-primary) {
  font-weight: 500;
  color: var(--text-secondary);
}

.nav-links a:not(.btn-primary):hover {
  color: var(--text-primary);
}

.hamburger {
  display: none;
  cursor: pointer;
}

.bar {
  display: block;
  width: 25px;
  height: 3px;
  margin: 5px auto;
  background-color: var(--text-primary);
  transition: all 0.3s ease-in-out;
}

/* Hero Section */
.hero {
  padding-top: calc(var(--header-height) + 4rem);
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.greeting {
  font-size: 1.2rem;
  color: var(--accent-primary);
  font-weight: 600;
  margin-bottom: 1rem;
  display: block;
}

.name {
  font-family: var(--font-heading);
  font-size: 4rem;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.bio {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  max-width: 500px;
}

.blob {
  width: 400px;
  height: 400px;
  background: var(--gradient-main);
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0% {
    transform: translateY(0px) scale(1);
  }
  50% {
    transform: translateY(-20px) scale(1.05);
  }
  100% {
    transform: translateY(0px) scale(1);
  }
}

/* Hero visual: profile photo + decorative blob */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 420px;
}

.hero-visual .blob {
  position: absolute;
  right: -40px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1;
  opacity: 0.45;
}

.profile-photo {
  width: 320px;
  height: 320px;
  object-fit: cover;
  border-radius: 50%;
  border: 6px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 20px 40px rgba(2, 6, 23, 0.6);
  position: relative;
  z-index: 2;
}

/* Footer */
.footer {
  padding: 2rem 0;
  border-top: var(--glass-border);
  text-align: center;
  color: var(--text-secondary);
}

.social-links {
  margin-top: 1rem;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}

.social-links a {
  font-size: 1.5rem;
  color: var(--text-secondary);
}

.social-links a:hover {
  color: var(--accent-primary);
  transform: translateY(-3px);
}

/* Responsive */
@media (max-width: 768px) {
  .hamburger {
    display: block;
  }

  .nav-links {
    position: fixed;
    left: -100%;
    top: var(--header-height);
    flex-direction: column;
    background-color: var(--bg-secondary);
    width: 100%;
    height: calc(100vh - var(--header-height));
    text-align: center;
    transition: 0.3s;
    padding-top: 2rem;
  }

  .nav-links.active {
    left: 0;
  }

  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content {
    order: 2;
  }

  .hero-visual {
    order: 1;
    display: flex;
    justify-content: center;
  }

  .profile-photo {
    width: 200px;
    height: 200px;
  }

  .hero-visual .blob {
    display: none;
  }

  .bio {
    margin: 0 auto 2.5rem;
  }

  .name {
    font-size: 3rem;
  }
}

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

.project-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-primary);
}

.project-image {
  height: 200px;
  background: linear-gradient(45deg, var(--bg-secondary), #2d3748);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 3rem;
}

.project-content {
  padding: 1.5rem;
}

.project-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.project-desc {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}

.project-tags {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.tag {
  font-size: 0.8rem;
  padding: 0.2rem 0.8rem;
  background: rgba(56, 189, 248, 0.1);
  color: var(--accent-primary);
  border-radius: 20px;
}

.project-links {
  display: flex;
  gap: 1rem;
}

.project-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.project-link:hover {
  color: var(--accent-primary);
}

/* Certifications Section */
.certifications-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.cert-card {
  background: rgba(255, 255, 255, 0.03);
  padding: 2rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.05);
  text-align: center;
  transition: 0.3s;
}

.cert-card:hover {
  background: rgba(255, 255, 255, 0.05);
  transform: translateY(-5px);
}

.cert-icon {
  font-size: 2.5rem;
  color: var(--accent-secondary);
  margin-bottom: 1rem;
}

.cert-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.cert-issuer {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Contact Section */
.contact-content {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.contact-text {
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-size: 1.1rem;
}

.contact-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  padding: 1rem 3rem;
  background: var(--gradient-main);
  color: white;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1.1rem;
  transition: 0.3s;
}

.contact-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.5);
}