/* ========================================
   VARIABLES & RESET
   ======================================== */
:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #0f0f18;
  --bg-card: #141420;
  --bg-card-hover: #1a1a2e;
  --border: #1e1e32;
  --border-hover: #2a2a45;
  --text-primary: #e8e8f0;
  --text-secondary: #8888a0;
  --text-muted: #55556a;
  --accent: #6c63ff;
  --accent-light: #8b83ff;
  --accent-glow: rgba(108, 99, 255, 0.15);
  --accent-glow-strong: rgba(108, 99, 255, 0.3);
  --gradient-1: linear-gradient(135deg, #6c63ff 0%, #a855f7 100%);
  --gradient-2: linear-gradient(135deg, #6c63ff 0%, #3b82f6 100%);
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--accent) var(--bg-secondary);
}

body {
  font-family: var(--font-main);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}
::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 3px;
}

::selection {
  background: var(--accent-glow-strong);
  color: #fff;
}

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

img {
  max-width: 100%;
  display: block;
}

/* ========================================
   CURSOR GLOW
   ======================================== */
.cursor-glow {
  position: fixed;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity 0.4s ease;
}

/* ========================================
   NAVIGATION
   ======================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 3rem;
  transition: all 0.4s var(--ease-smooth);
  background: transparent;
}

.nav.scrolled {
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 0.85rem 3rem;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  transition: transform 0.3s var(--ease-out);
}
.nav-logo:hover {
  transform: scale(1.05);
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 0.25rem 0;
  transition: color 0.3s ease;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-1);
  border-radius: 1px;
  transition: width 0.3s var(--ease-out);
}
.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
}
.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 99;
  background: rgba(10, 10, 15, 0.97);
  backdrop-filter: blur(20px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}
.mobile-menu.open {
  opacity: 1;
  pointer-events: all;
}

.mobile-link {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color 0.3s ease;
}
.mobile-link:hover {
  color: var(--accent);
}

/* ========================================
   HERO
   ======================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6rem 3rem 7rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.3;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 30%, transparent 100%);
}

.gradient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.4;
}
.orb-1 {
  width: 500px;
  height: 500px;
  background: var(--accent);
  top: -15%;
  right: -5%;
  animation: float 8s ease-in-out infinite;
}
.orb-2 {
  width: 400px;
  height: 400px;
  background: #a855f7;
  bottom: -10%;
  left: -10%;
  animation: float 10s ease-in-out infinite reverse;
}
.orb-3 {
  width: 300px;
  height: 300px;
  background: #3b82f6;
  top: 40%;
  left: 50%;
  animation: float 12s ease-in-out infinite 2s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -30px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem;
  background: var(--accent-glow);
  border: 1px solid rgba(108, 99, 255, 0.2);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent-light);
  margin-bottom: 2rem;
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.4); }
  50% { opacity: 0.8; box-shadow: 0 0 0 8px rgba(34, 197, 94, 0); }
}

.hero-title {
  font-size: clamp(2.5rem, 7vw, 5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

.hero-title .line {
  display: block;
}

.hero-title .name-line {
  background: var(--gradient-1);
  -webkit-background-clip: text;
  background-clip: text;
}

.accent {
  color: var(--accent);
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  font-family: var(--font-mono);
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 550px;
  margin: 0 auto 2.5rem;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.3s var(--ease-out);
}

.btn-primary {
  background: var(--gradient-1);
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow-strong);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-glow-strong);
}

.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  border-color: var(--accent);
  background: var(--accent-glow);
}

/* Scroll indicator */
.scroll-indicator {
  margin-top: 3rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-muted);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  animation: fadeInScroll 1.5s ease 1.5s both;
}

@keyframes fadeInScroll {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.scroll-mouse {
  width: 24px;
  height: 38px;
  border: 2px solid var(--text-muted);
  border-radius: 12px;
  position: relative;
  transition: border-color 0.3s ease;
}

.scroll-indicator:hover .scroll-mouse {
  border-color: var(--accent);
}

.scroll-wheel {
  width: 3px;
  height: 8px;
  background: var(--accent);
  border-radius: 3px;
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  animation: scrollWheel 2s ease-in-out infinite;
}

@keyframes scrollWheel {
  0% { opacity: 1; top: 6px; }
  50% { opacity: 0.3; top: 18px; }
  100% { opacity: 1; top: 6px; }
}

.scroll-arrows {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  margin-top: -0.2rem;
}

.scroll-arrows svg {
  color: var(--text-muted);
  animation: scrollArrow 2s ease-in-out infinite;
  transition: color 0.3s ease;
}

.scroll-arrows svg:nth-child(2) {
  margin-top: -6px;
  animation-delay: 0.2s;
  opacity: 0.5;
}

.scroll-indicator:hover .scroll-arrows svg {
  color: var(--accent);
}

@keyframes scrollArrow {
  0%, 100% { transform: translateY(0); opacity: 0.4; }
  50% { transform: translateY(4px); opacity: 1; }
}

/* ========================================
   SECTIONS
   ======================================== */
.section {
  padding: 6rem 0;
  position: relative;
}

.section-alt {
  background: var(--bg-secondary);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section-header {
  margin-bottom: 3.5rem;
  text-align: center;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 0.75rem;
  letter-spacing: 0.05em;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

/* ========================================
   ABOUT
   ======================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: start;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  font-size: 1rem;
  line-height: 1.85;
}
.about-text strong {
  color: var(--text-primary);
}

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

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
  text-align: center;
  transition: all 0.3s var(--ease-out);
}
.stat-card:hover {
  border-color: var(--accent);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}

.stat-number {
  font-size: 2.2rem;
  font-weight: 800;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-plus {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
  font-weight: 500;
}

/* ========================================
   TIMELINE / EXPERIENCE
   ======================================== */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--border));
  border-radius: 1px;
}

.timeline-item {
  position: relative;
  margin-bottom: 2.5rem;
}
.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -2rem;
  top: 1.5rem;
  width: 12px;
  height: 12px;
  background: var(--accent);
  border-radius: 50%;
  transform: translateX(-5px);
  box-shadow: 0 0 0 4px var(--bg-secondary), 0 0 20px var(--accent-glow-strong);
}

.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.75rem;
  margin-left: 1rem;
  transition: all 0.3s var(--ease-out);
}
.timeline-card:hover {
  border-color: var(--border-hover);
  transform: translateX(4px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.timeline-role {
  font-size: 1.15rem;
  font-weight: 700;
}

.timeline-company {
  color: var(--accent);
  font-weight: 500;
  font-size: 0.9rem;
  margin-top: 0.2rem;
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  white-space: nowrap;
  background: var(--accent-glow);
  padding: 0.3rem 0.75rem;
  border-radius: 100px;
  flex-shrink: 0;
}

.timeline-list {
  list-style: none;
  margin-bottom: 1rem;
}
.timeline-list li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.7;
}
.timeline-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 5px;
  height: 5px;
  background: var(--accent);
  border-radius: 50%;
}

.timeline-tags,
.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.3rem 0.7rem;
  background: var(--accent-glow);
  color: var(--accent-light);
  border-radius: 6px;
  border: 1px solid rgba(108, 99, 255, 0.1);
}

/* ========================================
   SKILLS
   ======================================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.75rem;
  transition: all 0.3s var(--ease-out);
}
.skill-category:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.skill-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-glow);
  border-radius: 12px;
  margin-bottom: 1rem;
  color: var(--accent);
}

.skill-category h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.skill-tag {
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.3rem 0.65rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  transition: all 0.3s ease;
}
.skill-category:hover .skill-tag {
  border-color: var(--border-hover);
  color: var(--text-primary);
}

/* ========================================
   PROJECTS
   ======================================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  transition: all 0.4s var(--ease-out);
  position: relative;
  overflow: hidden;
}
.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-1);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease-out);
}
.project-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-6px);
  box-shadow: 0 16px 50px rgba(0, 0, 0, 0.3);
}
.project-card:hover::before {
  transform: scaleX(1);
}

.project-icon {
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.project-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.project-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

/* ========================================
   EDUCATION
   ======================================== */
.education-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.edu-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  position: relative;
  transition: all 0.3s var(--ease-out);
}
.edu-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.edu-year {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 0.75rem;
  background: var(--accent-glow);
  display: inline-block;
  padding: 0.25rem 0.7rem;
  border-radius: 6px;
}

.edu-degree {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
  line-height: 1.4;
}

.edu-school {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.edu-thesis {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
  border-top: 1px solid var(--border);
  padding-top: 0.75rem;
}
.edu-thesis strong {
  color: var(--text-secondary);
}

/* ========================================
   CONTACT
   ======================================== */
.contact-content {
  text-align: center;
}

.contact-text {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 500px;
  margin: 0 auto 2.5rem;
  line-height: 1.8;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  max-width: 900px;
  margin: 0 auto;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  transition: all 0.3s var(--ease-out);
  text-align: left;
}
.contact-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.contact-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-glow);
  border-radius: 10px;
  color: var(--accent);
  flex-shrink: 0;
}

.contact-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-value {
  display: block;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-top: 0.1rem;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  background: var(--bg-primary);
}

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

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

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

.footer-links a {
  color: var(--text-muted);
  transition: color 0.3s ease;
}
.footer-links a:hover {
  color: var(--accent);
}

/* ========================================
   ANIMATIONS (initial states)
   ======================================== */
[data-animate] {
  opacity: 0;
  transform: translateY(30px);
}

[data-animate].animated {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 968px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .mobile-menu { display: flex; }

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

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

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

@media (max-width: 640px) {
  .nav {
    padding: 1rem 1.5rem;
  }
  .nav.scrolled {
    padding: 0.75rem 1.5rem;
  }

  .hero {
    padding: 6rem 1.5rem 3rem;
  }

  .container {
    padding: 0 1.25rem;
  }

  .section {
    padding: 4rem 0;
  }

  .skills-grid,
  .projects-grid,
  .education-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

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

  .timeline {
    padding-left: 1.5rem;
  }

  .timeline-dot {
    left: -1.5rem;
  }

  .timeline-card {
    margin-left: 0.5rem;
    padding: 1.25rem;
  }

  .timeline-header {
    flex-direction: column;
    gap: 0.5rem;
  }

  .footer-content {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}