/* ========================================
   ROOT VARIABLES & RESET
   ======================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #17a2ff;
  --primary-dark: #0d7ab8;
  --bg: #0a0f1f;
  --bg-secondary: #141820;
  --text: #e8eef5;
  --text-secondary: #a8b5c4;
  --accent: #00d4ff;
  --success: #10b981;
}

body {
  font-family: 'Poppins', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ========================================
   NAVIGATION
   ======================================== */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(10, 15, 31, 0.95);
  backdrop-filter: blur(10px);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  border-bottom: 1px solid rgba(23, 162, 255, 0.1);
}

.nav-logo {
  font-size: 1.3rem;
  font-weight: 700;
  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: 2rem;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  transition: color 0.3s ease;
  font-weight: 500;
  font-size: 0.9rem;
}

.nav-links a:hover {
  color: var(--primary);
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
}

/* ========================================
   HERO SECTION
   ======================================== */
header {
  margin-top: 70px;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, rgba(23, 162, 255, 0.1) 0%, rgba(0, 212, 255, 0.05) 100%);
  position: relative;
  overflow: hidden;
}

header::before {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(23, 162, 255, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  top: -200px;
  right: -200px;
}

header::after {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  bottom: -150px;
  left: -100px;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  padding: 0 2rem;
}

.hero-content img {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  margin-bottom: 2rem;
  border: 3px solid var(--primary);
  animation: float 3s ease-in-out infinite;
}

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

h1 {
  font-size: clamp(2.5rem, 8vw, 4rem);
  margin: 1rem 0;
  font-weight: 700;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 1.3rem;
  color: var(--text-secondary);
  margin: 1.5rem 0 2rem;
  font-weight: 300;
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 2rem;
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
  padding: 12px 32px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.3s ease;
  font-size: 1rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  box-shadow: 0 10px 30px rgba(23, 162, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 40px rgba(23, 162, 255, 0.4);
}

.btn-secondary {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-secondary:hover {
  background: var(--primary);
  color: white;
}

/* ========================================
   SECTIONS
   ======================================== */
section {
  padding: 6rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

h2 {
  font-size: 2.5rem;
  margin-bottom: 3rem;
  position: relative;
  display: inline-block;
}

h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
}

h3 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: var(--primary);
}

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

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

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

.skills {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
}

.skill-item {
  background: var(--bg);
  padding: 1.5rem;
  border-radius: 10px;
  border-left: 4px solid var(--primary);
}

.skill-item strong {
  color: var(--primary);
  display: block;
  margin-bottom: 0.5rem;
}

.skill-item p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

@media (max-width: 768px) {
  .about-content {
    grid-template-columns: 1fr;
  }

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

/* ========================================
   PROJECTS SECTION
   ======================================== */
#projects {
  background: var(--bg);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.project-card {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(23, 162, 255, 0.05) 100%);
  border: 1px solid rgba(23, 162, 255, 0.1);
  border-radius: 15px;
  padding: 2rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(23, 162, 255, 0.1), transparent);
  transition: left 0.5s ease;
}

.project-card:hover::before {
  left: 100%;
}

.project-card:hover {
  transform: translateY(-10px);
  border-color: var(--primary);
  box-shadow: 0 20px 40px rgba(23, 162, 255, 0.15);
}

.project-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.project-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.project-card h3 {
  color: var(--text);
  margin: 0;
}

.project-description {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

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

.tech-tag {
  background: rgba(23, 162, 255, 0.15);
  color: var(--primary);
  padding: 0.4rem 0.8rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
}

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

.project-links a {
  color: var(--primary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  transition: color 0.3s ease;
}

.project-links a:hover {
  color: var(--accent);
}

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

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.service-card {
  background: var(--bg);
  padding: 2.5rem;
  border-radius: 15px;
  text-align: center;
  transition: all 0.3s ease;
  border: 1px solid rgba(23, 162, 255, 0.1);
}

.service-card:hover {
  transform: scale(1.05);
  border-color: var(--primary);
}

.service-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.service-card h3 {
  margin-bottom: 1rem;
}

.service-card p {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ========================================
   CONTACT SECTION
   ======================================== */
#contact {
  background: var(--bg);
  text-align: center;
}

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

.contact-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
}

.contact-link:hover {
  color: var(--accent);
  transform: translateX(5px);
}

form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  max-width: 600px;
  margin: 0 auto;
}

input, textarea {
  padding: 1rem;
  border-radius: 10px;
  border: 1px solid rgba(23, 162, 255, 0.2);
  background: var(--bg-secondary);
  color: var(--text);
  font-family: 'Poppins', system-ui, sans-serif;
  font-size: 1rem;
  transition: all 0.3s ease;
}

input:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 15px rgba(23, 162, 255, 0.2);
}

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

/* ========================================
   FOOTER
   ======================================== */
footer {
  background: var(--bg-secondary);
  padding: 2rem;
  text-align: center;
  border-top: 1px solid rgba(23, 162, 255, 0.1);
  color: var(--text-secondary);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-links a:hover {
  color: var(--accent);
}

/* ========================================
   ANIMATIONS
   ======================================== */
@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: slideInUp 0.6s ease-out;
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.8rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  section {
    padding: 3rem 1.5rem;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 300px;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }
}