/* Base Styles & Variables */
:root {
  --primary-color: #4a6cfa;
  --secondary-color: #131a36;
  --accent-color: #ff6464;
  --background-color: #0f172a;
  --surface-color: #1e293b;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-tertiary: #94a3b8;
  --success-color: #22c55e;
  --warning-color: #f59e0b;
  --error-color: #ef4444;

  --font-family: 'Inter', sans-serif;
  --transition: all 0.3s ease;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);

  --spacing-1: 8px;
  --spacing-2: 16px;
  --spacing-3: 24px;
  --spacing-4: 32px;
  --spacing-5: 48px;
  --spacing-6: 64px;
  --spacing-7: 80px;
  --spacing-8: 96px;

  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  --border-radius-xl: 16px;
  --border-radius-full: 9999px;
}

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

html {
  scroll-behavior: smooth;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-3);
}

.btn {
  display: inline-block;
  padding: var(--spacing-2) var(--spacing-3);
  border-radius: var(--border-radius-md);
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  outline: none;
}

.primary-btn {
  background-color: var(--primary-color);
  color: var(--text-primary);
}

.primary-btn:hover {
  background-color: #3a59dd;
  transform: translateY(-2px);
}

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

.secondary-btn:hover {
  background-color: rgba(74, 108, 250, 0.1);
  transform: translateY(-2px);
}

/* Header & Navigation */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(10px);
  transition: var(--transition);
  padding: var(--spacing-2) 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

header.scrolled {
  padding: var(--spacing-1) 0;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
}

.logo span {
  color: var(--primary-color);
}

.nav-links {
  display: flex;
  gap: var(--spacing-3);
}

.nav-links a {
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: var(--spacing-1) 0;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: var(--transition);
}

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

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
}

.hamburger span {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--text-primary);
  margin: 3px 0;
  transition: var(--transition);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: var(--spacing-8) 0;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 20%, rgba(74, 108, 250, 0.2) 0%, transparent 30%),
    radial-gradient(circle at 80% 70%, rgba(74, 108, 250, 0.1) 0%, transparent 30%);
  z-index: -1;
}

.hero-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-5);
}

.hero-text {
  flex: 1;
}

.hero-text h1 {
  font-size: 4rem;
  font-weight: 700;
  margin-bottom: var(--spacing-2);
  line-height: 1.2;
}

.hero-text h1 span {
  color: var(--primary-color);
  position: relative;
  display: inline-block;
}

.hero-text h1 span::after {
  content: '';
  position: absolute;
  bottom: 5px;
  left: 0;
  width: 100%;
  height: 8px;
  background-color: rgba(74, 108, 250, 0.3);
  z-index: -1;
}

.hero-text h2 {
  font-size: 1.8rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2);
  font-weight: 500;
}

.hero-text p {
  font-size: 1.2rem;
  color: var(--text-tertiary);
  margin-bottom: var(--spacing-4);
  max-width: 600px;
}

.hero-btns {
  display: flex;
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-4);
}

.social-links {
  display: flex;
  gap: var(--spacing-2);
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--surface-color);
  color: var(--text-secondary);
  font-size: 1.2rem;
  transition: var(--transition);
}

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

.hero-image {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.profile-image {
  width: 300px;
  height: 300px;
  border-radius: var(--border-radius-full);
  overflow: hidden;
  border: 5px solid rgba(74, 108, 250, 0.3);
  position: relative;
}

.profile-image::before {
  content: '';
  position: absolute;
  top: -10px;
  left: -10px;
  right: -10px;
  bottom: -10px;
  border-radius: 50%;
  border: 2px dashed var(--primary-color);
  animation: rotate 20s linear infinite;
}

.profile-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

/* Section Styles */
section {
  padding: var(--spacing-7) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-5);
}

.section-header h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-2);
  position: relative;
  display: inline-block;
}

.underline {
  height: 4px;
  width: 70px;
  background-color: var(--primary-color);
  margin: 0 auto;
  border-radius: var(--border-radius-full);
}

/* About Section */
.about-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-5);
}

.about-text {
  flex: 1;
}

.about-text p {
  margin-bottom: var(--spacing-3);
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.github-stats {
  display: flex;
  gap: var(--spacing-4);
  margin-top: var(--spacing-4);
}

.stat {
  flex: 1;
  text-align: center;
  background-color: var(--surface-color);
  padding: var(--spacing-3);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.stat:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.stat span {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: var(--spacing-1);
}

.stat p {
  font-size: 0.9rem;
  color: var(--text-tertiary);
  margin-bottom: 0;
}

/* Skills Section */
.skills-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-5);
}

.skill-category h3 {
  margin-bottom: var(--spacing-3);
  font-size: 1.5rem;
  position: relative;
  display: inline-block;
  padding-bottom: var(--spacing-1);
}

.skill-category h3::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background-color: var(--primary-color);
  border-radius: var(--border-radius-full);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--spacing-3);
}

.skill-item {
  background-color: var(--surface-color);
  padding: var(--spacing-3);
  border-radius: var(--border-radius-md);
  text-align: center;
  transition: var(--transition);
  box-shadow: var(--shadow-md);
}

.skill-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  background-color: rgba(30, 41, 59, 0.8);
}

.skill-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-2);
  color: var(--primary-color);
}

.skill-item h4 {
  font-size: 1.1rem;
  font-weight: 500;
}

/* Projects Section */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-4);
}

.project-card {
  background-color: var(--surface-color);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  cursor: pointer;
}

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

.project-content {
  padding: var(--spacing-3);
}

.project-title {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: var(--spacing-2);
  color: var(--text-primary);
}

.project-description {
  color: var(--text-tertiary);
  font-size: 0.95rem;
  margin-bottom: var(--spacing-3);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;  
  overflow: hidden;
  min-height: 4.5em;
}

.project-meta {
  display: flex;
  justify-content: space-between;
  padding-top: var(--spacing-2);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.project-language {
  background-color: rgba(74, 108, 250, 0.2);
  padding: 4px 10px;
  border-radius: var(--border-radius-full);
  font-size: 0.8rem;
  color: var(--primary-color);
  font-weight: 500;
}

.project-stats {
  display: flex;
  gap: var(--spacing-2);
  color: var(--text-tertiary);
  font-size: 0.9rem;
}

.project-stats span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.loading {
  grid-column: 1/-1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-5);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  border-top-color: var(--primary-color);
  animation: spin 1s ease-in-out infinite;
  margin-bottom: var(--spacing-2);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Contact Section */
.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-5);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-2);
}

.contact-item i {
  font-size: 1.5rem;
  color: var(--primary-color);
  margin-top: 5px;
}

.contact-item h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 5px;
}

.contact-item p {
  color: var(--text-secondary);
}

.contact-item a:hover {
  color: var(--primary-color);
  text-decoration: underline;
}

.contact-form {
  background-color: var(--surface-color);
  padding: var(--spacing-4);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: var(--spacing-3);
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background-color: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-md);
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 1rem;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(74, 108, 250, 0.2);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-form .btn {
  width: 100%;
  margin-top: var(--spacing-2);
}

/* Footer */
footer {
  background-color: var(--surface-color);
  padding: var(--spacing-5) 0 var(--spacing-3);
  margin-top: var(--spacing-5);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-4);
}

.footer-logo {
  font-size: 2rem;
  font-weight: 700;
}

.footer-social {
  display: flex;
  gap: var(--spacing-2);
}

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

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

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-3);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-tertiary);
}

/* Media Queries */
@media (max-width: 992px) {
  .hero-content {
    flex-direction: column-reverse;
    text-align: center;
  }

  .hero-text h1 {
    font-size: 3rem;
  }

  .hero-btns, .social-links {
    justify-content: center;
  }

  .about-content {
    flex-direction: column;
    text-align: center;
  }

  .skill-category h3::after {
    left: 50%;
    transform: translateX(-50%);
  }

  .skill-category h3 {
    display: block;
    text-align: center;
  }

  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-4);
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    background-color: var(--surface-color);
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-3) 0;
    transform: translateY(-150%);
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
    z-index: 999;
  }

  .nav-links.active {
    transform: translateY(0);
  }

  .hamburger {
    display: flex;
  }

  .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(6px, -6px);
  }

  .hero-text h1 {
    font-size: 2.5rem;
  }

  .hero-text h2 {
    font-size: 1.5rem;
  }

  .hero-text p {
    font-size: 1rem;
  }

  .hero-btns {
    flex-direction: column;
    gap: var(--spacing-2);
  }

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

  .github-stats {
    flex-direction: column;
    gap: var(--spacing-2);
  }

  .footer-content {
    flex-direction: column;
    gap: var(--spacing-3);
  }
}

@media (max-width: 480px) {
  .section-header h2 {
    font-size: 2rem;
  }

  .profile-image {
    width: 250px;
    height: 250px;
  }

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