/* ===================================
   Design System & Variables
   =================================== */
:root {
  /* Colors */
  --bg-light: #ffffff;
  --bg-dark: #0a0a0f;
  --bg-card: #141419;
  --bg-card-hover: #1a1a22;

  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-muted: rgba(255, 255, 255, 0.5);
  --text-dark: #0a0a0f;
  --text-dark-secondary: #4a4a5a;

  --accent-start: #63a1f1;
  --accent-end: #55f7c9;
  --accent-glow: rgba(99, 158, 241, 0.3);

  --border-light: rgba(255, 255, 255, 0.08);
  --border-dark: rgba(0, 0, 0, 0.08);

  /* Spacing */
  --section-padding: 120px;
  --container-max: 1200px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-medium: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family:
    "Inter",
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  background: var(--bg-light);
  color: var(--text-dark);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===================================
   Particle Background
   =================================== */
.particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 2px;
  height: 2px;
  background: var(--accent-start);
  border-radius: 50%;
  opacity: 0;
  animation: particle-float 6s infinite ease-in-out;
}

@keyframes particle-float {
  0%,
  100% {
    opacity: 0;
    transform: translateY(0) scale(0.5);
  }
  50% {
    opacity: 0.6;
    transform: translateY(-100px) scale(1);
  }
}

/* ===================================
   Navigation
   =================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-dark);
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  text-decoration: none;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

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

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

.nav-cta {
  background: var(--bg-dark) !important;
  color: var(--text-primary) !important;
  padding: 10px 20px;
  border-radius: var(--radius-full);
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast) !important;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: all var(--transition-medium);
  transform-origin: center;
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Menu Overlay */
.menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-medium);
  z-index: 998;
}

.menu-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 280px;
  max-width: 80%;
  height: 100%;
  background: var(--bg-light);
  z-index: 999;
  transition: right var(--transition-medium);
  box-shadow: -10px 0 40px rgba(0, 0, 0, 0.1);
}

.mobile-menu.active {
  right: 0;
}

.mobile-menu-content {
  display: flex;
  flex-direction: column;
  padding: 100px 32px 32px;
}

.mobile-menu-content a {
  padding: 16px 0;
  text-decoration: none;
  color: var(--text-dark);
  font-size: 1.25rem;
  font-weight: 600;
  border-bottom: 1px solid var(--border-dark);
  transition: color var(--transition-fast);
}

.mobile-menu-content a:hover {
  color: var(--accent-start);
}

.mobile-menu-divider {
  height: 1px;
  background: var(--border-dark);
  margin: 24px 0;
}

.mobile-menu-email {
  font-size: 1rem !important;
  font-weight: 500 !important;
  color: var(--accent-start) !important;
  border-bottom: none !important;
}

/* ===================================
   Hero Section
   =================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: 20%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  animation: glow-pulse 8s infinite ease-in-out;
}

@keyframes glow-pulse {
  0%,
  100% {
    opacity: 0.5;
    transform: scale(1);
  }
  50% {
    opacity: 0.8;
    transform: scale(1.1);
  }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent-start);
  margin-bottom: 24px;
}

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

@keyframes pulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.4);
  }
  50% {
    box-shadow: 0 0 0 8px rgba(34, 197, 94, 0);
  }
}

.hero h1 {
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

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

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-dark-secondary);
  max-width: 600px;
  margin-bottom: 40px;
  line-height: 1.7;
}

.hero-subtitle strong {
  color: var(--text-dark);
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ===================================
   Buttons
   =================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 28px;
  border-radius: var(--radius-full);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-medium);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--bg-dark);
  color: var(--text-primary);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.btn-primary svg {
  transition: transform var(--transition-fast);
}

.btn-primary:hover svg {
  transform: translate(3px, -3px);
}

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

.btn-secondary:hover {
  background: var(--bg-dark);
  color: var(--text-primary);
  border-color: var(--bg-dark);
}

.btn-large {
  padding: 20px 36px;
  font-size: 1.1rem;
}

/* ===================================
   Sections
   =================================== */
.section {
  position: relative;
  padding: var(--section-padding) 0;
  overflow: hidden;
}

.section-dark {
  background: var(--bg-dark);
  color: var(--text-primary);
}

.section-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  opacity: 0.5;
}

.section-glow-left {
  top: 0;
  left: -300px;
}

.section-glow-right {
  bottom: 0;
  right: -300px;
}

.section-header {
  margin-bottom: 60px;
}

.section-label {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-start);
  margin-bottom: 16px;
}

.section-dark .section-label {
  color: var(--accent-end);
}

.section h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
}

/* ===================================
   About Section
   =================================== */
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-bottom: 60px;
}

.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition-medium);
  opacity: 0;
  transform: translateY(30px);
}

.about-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.about-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(99, 102, 241, 0.3);
  transform: translateY(-5px);
}

.about-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: linear-gradient(
    135deg,
    rgba(99, 102, 241, 0.2),
    rgba(168, 85, 247, 0.2)
  );
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  color: var(--accent-end);
}

.about-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
}

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

/* Tech Stack */
.tech-stack {
  text-align: center;
}

.tech-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.tech-pills {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.tech-pill {
  padding: 10px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.tech-pill:hover {
  border-color: var(--accent-start);
  color: var(--text-primary);
}

/* ===================================
   Timeline / Experience
   =================================== */
.timeline {
  max-width: 700px;
}

.timeline-item {
  display: flex;
  gap: 24px;
  opacity: 0;
  transform: translateX(-30px);
  transition: all var(--transition-slow);
}

.timeline-item.visible {
  opacity: 1;
  transform: translateX(0);
}

.timeline-item:not(:last-child) {
  padding-bottom: 48px;
}

.timeline-marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 6px;
}

.timeline-dot {
  width: 14px;
  height: 14px;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  border-radius: 50%;
  box-shadow: 0 0 20px var(--accent-glow);
}

.timeline-line {
  flex: 1;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent-start), transparent);
  margin-top: 12px;
}

.timeline-content {
  flex: 1;
}

.timeline-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 4px;
}

.timeline-content h3 {
  font-size: 1.35rem;
  font-weight: 700;
}

.timeline-badge {
  padding: 4px 12px;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  color: white;
}

.timeline-role {
  display: block;
  font-weight: 600;
  color: var(--text-dark-secondary);
  margin-bottom: 4px;
}

.timeline-date {
  display: block;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.section:not(.section-dark) .timeline-date {
  color: var(--text-dark-secondary);
}

.timeline-content p {
  color: var(--text-dark-secondary);
  line-height: 1.7;
}

/* ===================================
   Projects
   =================================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 24px;
}

.project-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 32px;
  text-decoration: none;
  color: inherit;
  transition: all var(--transition-medium);
  opacity: 0;
  transform: translateY(30px);
  overflow: hidden;
}

.project-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.project-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-start), var(--accent-end));
  opacity: 0;
  transition: opacity var(--transition-medium);
}

.project-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(99, 102, 241, 0.3);
  transform: translateY(-8px) !important;
  box-shadow: 0 20px 60px rgba(99, 102, 241, 0.15);
}

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

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 20px;
}

.project-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: linear-gradient(
    135deg,
    rgba(99, 102, 241, 0.2),
    rgba(168, 85, 247, 0.2)
  );
  border-radius: var(--radius-md);
  color: var(--accent-end);
}

.project-status {
  display: flex;
  align-items: start;
  justify-content: space-between;
}

.project-arrow {
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.project-card:hover .project-arrow {
  color: var(--accent-end);
  transform: translate(4px, -4px);
}

.project-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.project-card p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.project-link {
  display: inline-flex;
  align-items: center;
  font-weight: 600;
  color: var(--accent-end);
}

.project-link-disabled {
  color: var(--text-muted);
}

/* Work in Progress Badge */
.project-card-wip {
  cursor: default;
}

.wip-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(251, 191, 36, 0.15);
  border: 1px solid rgba(251, 191, 36, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  color: #fbbf24;
}

.wip-dot {
  width: 6px;
  height: 6px;
  background: #fbbf24;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

/* ===================================
   Contact Section
   =================================== */
.section-contact {
  padding: 80px 0 120px;
}

.contact-card {
  position: relative;
  background: var(--bg-dark);
  border-radius: var(--radius-xl);
  padding: 80px 60px;
  text-align: center;
  overflow: hidden;
}

.contact-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  opacity: 0.5;
  pointer-events: none;
}

.contact-card h2 {
  position: relative;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.contact-card p {
  position: relative;
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 500px;
  margin: 0 auto 32px;
}

.contact-card .btn {
  position: relative;
}

/* ===================================
   Footer
   =================================== */
.footer {
  background: var(--bg-dark);
  padding: 60px 0 40px;
  border-top: 1px solid var(--border-light);
}

.footer-main {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 24px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-logo {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-tagline {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-end;
}

.footer-email,
.footer-location {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color var(--transition-fast);
}

.footer-email:hover {
  color: var(--accent-end);
}

.footer-email svg,
.footer-location svg {
  opacity: 0.7;
}

.footer-bottom {
  text-align: center;
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ===================================
   Responsive
   =================================== */
@media (max-width: 768px) {
  :root {
    --section-padding: 80px;
  }

  .nav-links {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .hero {
    padding: 100px 0 60px;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }

  .hero-actions {
    flex-direction: column;
  }

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

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

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

  .timeline-item {
    flex-direction: column;
    gap: 16px;
  }

  .timeline-marker {
    flex-direction: row;
    padding-top: 0;
  }

  .timeline-line {
    display: none;
  }

  .footer-main {
    flex-direction: column;
    gap: 32px;
    text-align: center;
    align-items: center;
  }

  .footer-contact {
    align-items: center;
  }
}

/* Animation delays for stagger effect */
.about-card:nth-child(1) {
  transition-delay: 0s;
}
.about-card:nth-child(2) {
  transition-delay: 0.1s;
}
.about-card:nth-child(3) {
  transition-delay: 0.2s;
}

.timeline-item:nth-child(1) {
  transition-delay: 0s;
}
.timeline-item:nth-child(2) {
  transition-delay: 0.15s;
}

.project-card:nth-child(1) {
  transition-delay: 0s;
}
.project-card:nth-child(2) {
  transition-delay: 0.1s;
}