/* ============================================
   PORTFOLIO C3RTarzan - Dark Theme
   ============================================ */

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

:root {
  /* Colors */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #1a1a2e;
  --bg-card-hover: #22223a;
  --accent-primary: #7c3aed;
  --accent-secondary: #06b6d4;
  --accent-glow: rgba(124, 58, 237, 0.3);
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border-color: rgba(124, 58, 237, 0.15);
  --glass-bg: rgba(18, 18, 26, 0.8);
  --glass-border: rgba(124, 58, 237, 0.1);

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #7c3aed, #a855f7);
  --gradient-accent: linear-gradient(135deg, #7c3aed, #06b6d4);
  --gradient-text: linear-gradient(135deg, #7c3aed, #a855f7, #06b6d4);
  --gradient-card: linear-gradient(145deg, rgba(124, 58, 237, 0.08), rgba(6, 182, 212, 0.05));

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px var(--accent-glow);
  --shadow-glow-sm: 0 0 15px rgba(124, 58, 237, 0.2);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Spacing */
  --nav-height: 70px;
}

html {
  scroll-behavior: smooth;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul { list-style: none; }
img { max-width: 100%; }

::selection {
  background: var(--accent-primary);
  color: white;
}

::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--accent-primary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #6d28d9;
}

/* --- Particles --- */
#particles {
  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%;
  height: var(--nav-height);
  z-index: 1000;
  background: transparent;
  transition: var(--transition-normal);
}

.navbar.scrolled {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: var(--transition-fast);
}

.nav-logo:hover {
  opacity: 0.8;
}

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

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

.nav-menu {
  display: flex;
  gap: 8px;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: 8px;
  transition: var(--transition-normal);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 1px;
  transition: var(--transition-normal);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  background: rgba(124, 58, 237, 0.1);
}

.nav-link.active::after {
  transform: translateX(-50%) scaleX(1);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition-normal);
}

.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(5px, -5px);
}

/* --- Sections --- */
.section {
  position: relative;
  z-index: 1;
  padding: 100px 0;
}

.section-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 60px;
}

.section-number {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent-primary);
}

.section-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  white-space: nowrap;
}

.section-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border-color), transparent);
}

/* --- Hero --- */
.hero {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 24px 60px;
}

.hero-content {
  max-width: 800px;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(124, 58, 237, 0.1);
  border: 1px solid rgba(124, 58, 237, 0.2);
  border-radius: 100px;
  font-size: 0.85rem;
  color: var(--accent-primary);
  margin-bottom: 32px;
  animation: fadeInDown 0.6s ease;
}

.badge-dot {
  width: 8px;
  height: 8px;
  background: #22c55e;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.hero-title {
  font-size: 4rem;
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 16px;
  animation: fadeInUp 0.6s ease 0.2s both;
}

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

.hero-typing-wrapper {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  color: var(--accent-secondary);
  margin-bottom: 24px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeInUp 0.6s ease 0.3s both;
}

.typing-prefix {
  color: var(--text-muted);
}

.typing-cursor {
  animation: blink 1s step-end infinite;
  font-weight: 300;
  color: var(--accent-secondary);
  margin-left: 2px;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 32px;
  line-height: 1.8;
  animation: fadeInUp 0.6s ease 0.4s both;
}

.hero-description strong {
  color: var(--text-primary);
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 48px;
  animation: fadeInUp 0.6s ease 0.5s both;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition-normal);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-glow-sm);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-outline:hover {
  border-color: var(--accent-primary);
  background: rgba(124, 58, 237, 0.1);
  transform: translateY(-2px);
}

.hero-stats {
  display: flex;
  gap: 48px;
  justify-content: center;
  animation: fadeInUp 0.6s ease 0.6s both;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-family: var(--font-mono);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.8rem;
  animation: fadeInUp 0.6s ease 1s both, bounce 2s ease infinite;
}

.hero-scroll i {
  font-size: 1rem;
}

/* --- About --- */
.about {
  background: var(--bg-secondary);
}

.about-content {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
}

.about-text p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

.about-text strong {
  color: var(--text-primary);
}

.about-highlights {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 24px;
}

.highlight {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: rgba(124, 58, 237, 0.05);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: var(--transition-normal);
}

.highlight:hover {
  background: rgba(124, 58, 237, 0.1);
  border-color: rgba(124, 58, 237, 0.3);
  transform: translateX(4px);
}

.highlight i {
  color: var(--accent-primary);
  font-size: 1.1rem;
}

.avatar-frame {
  width: 280px;
  height: 280px;
  margin: 0 auto;
  border-radius: 50%;
  background: var(--gradient-card);
  border: 2px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.avatar-frame::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: 50%;
  background: var(--gradient-primary);
  opacity: 0.3;
  z-index: -1;
  animation: rotate 8s linear infinite;
}

.avatar-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
}

.avatar-placeholder i {
  font-size: 4rem;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.avatar-placeholder span {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--text-secondary);
}

/* --- Projects --- */
.projects-filter {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.filter-btn {
  padding: 8px 20px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: var(--transition-normal);
  font-family: var(--font-sans);
}

.filter-btn:hover {
  border-color: var(--accent-primary);
  color: var(--text-primary);
}

.filter-btn.active {
  background: var(--gradient-primary);
  color: white;
  border-color: transparent;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 28px;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.5s ease forwards;
}

.project-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(124, 58, 237, 0.3);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow-sm);
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition-normal);
}

.project-card:hover::before {
  transform: scaleX(1);
}

.project-card.hidden {
  display: none;
}

.project-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--accent-primary);
  margin-bottom: 20px;
}

.project-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.project-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tech-tag {
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 500;
  background: rgba(124, 58, 237, 0.1);
  color: var(--accent-primary);
  border: 1px solid rgba(124, 58, 237, 0.15);
  transition: var(--transition-fast);
}

.tech-tag:hover {
  background: rgba(124, 58, 237, 0.2);
}

.project-links {
  margin-top: 16px;
  display: flex;
  gap: 12px;
}

.project-link {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition-fast);
}

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

/* --- Skills --- */
.skills {
  background: var(--bg-secondary);
}

.skills-content {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.skill-category h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.skill-category h3 i {
  color: var(--accent-primary);
}

.skill-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.skill-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.skill-item span {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.skill-bar {
  width: 100%;
  height: 6px;
  background: rgba(124, 58, 237, 0.1);
  border-radius: 3px;
  overflow: hidden;
}

.skill-progress {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: 3px;
  width: 0;
  transition: width 1.5s ease;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-tag {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  background: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  transition: var(--transition-normal);
}

.skill-tag:hover {
  background: rgba(124, 58, 237, 0.1);
  border-color: var(--accent-primary);
  color: var(--text-primary);
  transform: translateY(-2px);
}

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

.contact-text {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 40px;
}

.contact-links {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.contact-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 32px 48px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  transition: var(--transition-normal);
  min-width: 200px;
}

.contact-card:hover {
  border-color: rgba(124, 58, 237, 0.3);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow-sm);
}

.contact-card i {
  font-size: 2.5rem;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.contact-label {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.contact-handle {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* --- Footer --- */
.footer {
  position: relative;
  z-index: 1;
  padding: 40px 24px;
  border-top: 1px solid var(--border-color);
  background: var(--bg-primary);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.footer-logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 12px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.footer-text {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 8px;
}

.footer-text i {
  color: #ef4444;
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.8rem;
}

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

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes blink {
  50% { opacity: 0; }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-8px); }
  60% { transform: translateX(-50%) translateY(-4px); }
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* --- Reveal Animation (Intersection Observer) --- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .about-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-image {
    order: -1;
  }

  .skills-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    flex-direction: column;
    gap: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    padding: 16px;
    transform: translateY(-100%);
    opacity: 0;
    transition: var(--transition-normal);
    pointer-events: none;
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .nav-link {
    padding: 12px 16px;
    border-radius: 8px;
  }

  .hamburger {
    display: flex;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-typing-wrapper {
    font-size: 1rem;
  }

  .hero-stats {
    gap: 24px;
  }

  .stat-number {
    font-size: 2rem;
  }

  .section-title {
    font-size: 1.5rem;
  }

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

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

  .contact-links {
    flex-direction: column;
    align-items: center;
  }

  .about-highlights {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .hero-stats {
    flex-direction: column;
    gap: 16px;
  }

  .project-card {
    padding: 20px;
  }
}