/* ============================================
   CSS VARIABLES & ROOT STYLES
   ============================================ */
:root {
  /* Color Palette */
  --bg-primary: #0a0a0f;
  --bg-secondary: #1a1a2e;
  --bg-tertiary: #16213e;
  --accent-primary: #00d9ff;
  --accent-secondary: #a855f7;
  --accent-tertiary: #00ff88;
  --text-primary: #e5e5e5;
  --text-secondary: #b8b8b8;
  --text-muted: #9ca3af;
  --glow-primary: rgba(0, 217, 255, 0.5);
  --glow-secondary: rgba(168, 85, 247, 0.5);

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;

  /* Typography */
  --font-primary: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.875rem;
  --font-size-sm: 1rem;
  --font-size-md: 1.125rem;
  --font-size-lg: 1.5rem;
  --font-size-xl: 2rem;
  --font-size-2xl: 3rem;
  --font-size-3xl: 4rem;

  /* Effects */
  --border-radius: 12px;
  --border-radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s ease;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 30px var(--glow-primary);
}

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

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

/* Background Gradient Overlay */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(ellipse at top, rgba(0, 217, 255, 0.1) 0%, transparent 60%),
              radial-gradient(ellipse at bottom, rgba(168, 85, 247, 0.1) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

/* Particle Canvas */
#particles-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 1.5rem 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
  background: rgba(10, 10, 15, 0.8);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: var(--transition);
}

.navbar.scrolled {
  padding: 1rem 0;
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  text-decoration: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  transition: var(--transition);
}

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

.logo-text {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2.5rem;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  position: relative;
  transition: var(--transition);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-primary);
  transition: width 0.3s ease;
}

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

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

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1001;
}

.mobile-menu-toggle span {
  width: 25px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition);
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: relative;
  padding: 0 2rem;
  z-index: 1;
}

.hero-content {
  text-align: center;
  max-width: 900px;
  /* position: relative; */
  z-index: 2;
}

/* Floating Shapes */
.floating-shapes {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  overflow: hidden;
  z-index: -1;
}

.shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  opacity: 0.3;
  animation: float 20s infinite ease-in-out;
}

.shape-1 {
  width: 300px;
  height: 300px;
  background: var(--accent-primary);
  top: 10%;
  left: 10%;
  animation-delay: 0s;
}

.shape-2 {
  width: 400px;
  height: 400px;
  background: var(--accent-secondary);
  top: 50%;
  right: 10%;
  animation-delay: -7s;
}

.shape-3 {
  width: 250px;
  height: 250px;
  background: var(--accent-tertiary);
  bottom: 20%;
  left: 30%;
  animation-delay: -14s;
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 700;
  margin-bottom: 1.5rem;
  letter-spacing: -2px;
  line-height: 1.1;
}

.gradient-text {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary), var(--accent-tertiary));
  background-size: 200% 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradient-shift 5s ease infinite;
  padding: 0 0.1em;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.hero-subtitle {
  font-size: clamp(1.25rem, 3vw, 2rem);
  color: var(--text-secondary);
  margin-bottom: 3rem;
  min-height: 3rem;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.25rem;
}

.cursor {
  animation: blink 1s infinite;
  color: var(--accent-primary);
}

.hero-buttons {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 3rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.875rem;
  animation: bounce 2s infinite;
}

.scroll-mouse {
  width: 30px;
  height: 50px;
  border: 2px solid var(--accent-primary);
  border-radius: 20px;
  position: relative;
}

.scroll-wheel {
  width: 4px;
  height: 10px;
  background: var(--accent-primary);
  border-radius: 2px;
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  animation: scroll-wheel 2s infinite;
}

/* ============================================
   SECTION STYLES
   ============================================ */
.section {
  padding: var(--spacing-xl) 2rem;
  position: relative;
  z-index: 1;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 1rem;
  letter-spacing: -1px;
  background: linear-gradient(135deg, var(--text-primary), var(--accent-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: var(--font-size-md);
  margin-bottom: 3rem;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2.5rem;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  border: none;
  font-family: var(--font-primary);
  z-index: 1;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: var(--bg-primary);
  box-shadow: 0 4px 15px var(--glow-primary);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 25px var(--glow-primary);
}

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

.btn-secondary:hover {
  background: var(--accent-primary);
  color: var(--bg-primary);
  transform: translateY(-3px);
  box-shadow: 0 6px 25px var(--glow-primary);
}

.btn-ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  transform: scale(0);
  pointer-events: none;
}

.btn.ripple-active .btn-ripple {
  animation: ripple 0.6s ease-out;
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 4rem;
  align-items: center;
  margin-top: 3rem;
}

.about-image {
  position: relative;
  min-height: 300px;
}

.about-image.fade-in {
  opacity: 1;
  transform: translateY(0);
}

.image-wrapper {
  position: relative;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
}

.image-wrapper::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--border-radius-lg);
  box-shadow: inset 0 0 30px 10px var(--bg-primary);
  pointer-events: none;
}

.image-wrapper img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--border-radius-lg);
  transition: var(--transition);
  opacity: 1;
  filter: blur(0);
}

.image-wrapper:hover img {
  transform: scale(1.05);
}

.image-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80%;
  height: 80%;
  background: radial-gradient(circle, var(--accent-primary), transparent);
  opacity: 0;
  transition: var(--transition);
  border-radius: 50%;
  filter: blur(40px);
  z-index: -1;
}

.image-wrapper:hover .image-glow {
  opacity: 0.6;
}

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

.about-intro {
  font-size: var(--font-size-lg);
  color: var(--text-primary);
  font-weight: 500;
}

/* Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.stat-item {
  text-align: center;
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--border-radius);
  border: 1px solid rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  transition: var(--transition);
}

.stat-item:hover {
  transform: translateY(-5px);
  border-color: var(--accent-primary);
  box-shadow: 0 10px 30px var(--glow-primary);
}

.stat-number {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.stat-label {
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}

/* ============================================
   PROJECTS SECTION
   ============================================ */
.project-filters {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.75rem 1.5rem;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-secondary);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius);
  cursor: pointer;
  font-family: var(--font-primary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--accent-primary);
  color: var(--bg-primary);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2.5rem;
}

.project-card {
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px rgba(0, 217, 255, 0.2);
  border-color: var(--accent-primary);
}

.project-image {
  position: relative;
  overflow: hidden;
  height: 250px;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.project-card:hover .project-image img {
  transform: scale(1.1);
}

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  transition: var(--transition);
}

.project-card:hover .project-overlay {
  opacity: 1;
}

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

.project-link {
  width: 50px;
  height: 50px;
  background: var(--accent-primary);
  color: var(--bg-primary);
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 50%;
  font-size: 1.25rem;
  transition: var(--transition);
  text-decoration: none;
}

.project-link:hover {
  transform: scale(1.1) rotate(5deg);
  background: var(--accent-secondary);
}

.project-info {
  padding: 2rem;
}

.project-title {
  font-size: var(--font-size-lg);
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

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

.project-tech {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.tech-badge {
  padding: 0.4rem 0.9rem;
  background: rgba(0, 217, 255, 0.1);
  color: var(--accent-primary);
  border-radius: 20px;
  font-size: 0.875rem;
  border: 1px solid rgba(0, 217, 255, 0.2);
  font-weight: 500;
}

/* ============================================
   SKILLS SECTION
   ============================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.skill-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1rem;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--border-radius);
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: var(--transition);
  cursor: pointer;
}

.skill-item:hover {
  transform: translateY(-10px) rotate(2deg);
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--accent-primary);
  box-shadow: 0 15px 35px var(--glow-primary);
}

.skill-icon {
  font-size: 3.5rem;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: var(--transition);
}

.skill-item:hover .skill-icon {
  transform: scale(1.2) rotate(-5deg);
}

.skill-name {
  font-size: var(--font-size-md);
  color: var(--text-primary);
  font-weight: 600;
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-content {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 4rem;
  margin-top: 3rem;
}

/* Glassmorphic Card */
.glass-card {
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(10px);
  border-radius: var(--border-radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 3rem;
  box-shadow: var(--shadow-lg);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  position: relative;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem 1rem 1rem 0;
  background: transparent;
  border: none;
  border-bottom: 2px solid rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: var(--font-size-sm);
  transition: var(--transition);
  outline: none;
}

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

.form-group input:focus,
.form-group textarea:focus {
  border-bottom-color: var(--accent-primary);
}

.form-label {
  position: absolute;
  left: 0;
  top: 1rem;
  color: var(--text-muted);
  pointer-events: none;
  transition: var(--transition);
}

.form-group input:focus ~ .form-label,
.form-group input:not(:placeholder-shown) ~ .form-label,
.form-group textarea:focus ~ .form-label,
.form-group textarea:not(:placeholder-shown) ~ .form-label {
  top: -1.5rem;
  font-size: 0.875rem;
  color: var(--accent-primary);
}

.form-error {
  display: block;
  color: #ff4444;
  font-size: 0.875rem;
  margin-top: 0.5rem;
  min-height: 1.25rem;
}

.btn-submit {
  position: relative;
  margin-top: 1rem;
}

.btn-loading {
  display: none;
}

.btn-submit.loading .btn-text {
  display: none;
}

.btn-submit.loading .btn-loading {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.form-message {
  padding: 1rem;
  border-radius: var(--border-radius);
  text-align: center;
  font-weight: 500;
  display: none;
  animation: slideDown 0.3s ease;
}

.form-message.success {
  background: rgba(0, 255, 136, 0.1);
  border: 1px solid var(--accent-tertiary);
  color: var(--accent-tertiary);
  display: block;
}

.form-message.error {
  background: rgba(255, 68, 68, 0.1);
  border: 1px solid #ff4444;
  color: #ff4444;
  display: block;
}

.success-message {
  background: rgba(0, 255, 136, 0.1);
  border: 1px solid var(--accent-tertiary);
  color: var(--accent-tertiary);
  padding: 1rem;
  border-radius: var(--border-radius);
  text-align: center;
  font-weight: 500;
}

.error-message {
  background: rgba(255, 68, 68, 0.1);
  border: 1px solid #ff4444;
  color: #ff4444;
  padding: 1rem;
  border-radius: var(--border-radius);
  text-align: center;
  font-weight: 500;
}

/* Contact Info */
.contact-info {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.social-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.social-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.5rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}

.social-link:hover {
  background: var(--accent-primary);
  color: var(--bg-primary);
  transform: translateX(10px);
  box-shadow: 0 5px 20px var(--glow-primary);
}

.social-link i {
  font-size: 1.5rem;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 2rem;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--border-radius);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.contact-detail-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--text-secondary);
}

.contact-detail-item i {
  color: var(--accent-primary);
  font-size: 1.25rem;
  width: 30px;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  padding: 2rem;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  position: relative;
  z-index: 1;
}

.footer i {
  color: #ff4444;
  animation: heartbeat 1.5s infinite;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 968px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: rgba(10, 10, 15, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    padding: 2rem;
    transition: right 0.3s ease-in-out;
    border-left: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1000;
  }

  .nav-links.mobile-open {
    right: 0;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .about-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .stats {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

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

  .skills-grid {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
  }

  .contact-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .hero-buttons {
    flex-direction: column;
    width: 100%;
    max-width: 300px;
  }

  .btn {
    width: 100%;
  }
}

@media (max-width: 640px) {
  .section {
    padding: var(--spacing-lg) 1rem;
  }

  .nav-container {
    padding: 0 1rem;
  }

  .glass-card {
    padding: 2rem 1.5rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1.125rem;
  }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}