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

:root {
  color-scheme: dark;
  --bg: #09090b;
  --bg-elevated: #111113;
  --bg-card: #0f0f11;
  --border: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);
  --text-primary: #ffffff;
  --text-muted: #71717a;
  --text-dim: #52525b;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --nav-bg: rgba(9, 9, 11, 0.8);
  --mobile-nav-bg: rgba(9, 9, 11, 0.95);
  --nav-cta-hover-bg: rgba(255, 255, 255, 0.05);
  --nav-cta-hover-border: rgba(255, 255, 255, 0.2);
  --btn-primary-hover: #e4e4e7;
  --btn-outline-hover-bg: rgba(255, 255, 255, 0.03);
  --btn-outline-hover-border: rgba(255, 255, 255, 0.25);
  --stat-link-hover: rgba(255, 255, 255, 0.04);
  --focus-ring: rgba(255, 255, 255, 0.25);
  --project-badge-bg: rgba(255, 255, 255, 0.05);
  --skill-tag-bg: rgba(255, 255, 255, 0.03);
  --skill-tag-hover-bg: rgba(255, 255, 255, 0.06);
}

[data-theme='light'] {
  color-scheme: light;
  --bg: #fafafa;
  --bg-elevated: #f4f4f5;
  --bg-card: #ffffff;
  --border: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(0, 0, 0, 0.14);
  --text-primary: #09090b;
  --text-muted: #52525b;
  --text-dim: #71717a;
  --nav-bg: rgba(250, 250, 250, 0.88);
  --mobile-nav-bg: rgba(250, 250, 250, 0.97);
  --nav-cta-hover-bg: rgba(0, 0, 0, 0.04);
  --nav-cta-hover-border: rgba(0, 0, 0, 0.12);
  --btn-primary-hover: #27272a;
  --btn-outline-hover-bg: rgba(0, 0, 0, 0.04);
  --btn-outline-hover-border: rgba(0, 0, 0, 0.2);
  --stat-link-hover: rgba(0, 0, 0, 0.05);
  --focus-ring: rgba(0, 0, 0, 0.22);
  --project-badge-bg: rgba(0, 0, 0, 0.04);
  --skill-tag-bg: rgba(0, 0, 0, 0.03);
  --skill-tag-hover-bg: rgba(0, 0, 0, 0.06);
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

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

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

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

/* ====== NAV ====== */
#nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

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

.nav-links a {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

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

.nav-cta {
  padding: 8px 18px !important;
  border: 1px solid var(--border-hover);
  border-radius: 8px;
  transition: all 0.2s !important;
}

.nav-cta:hover {
  background: var(--nav-cta-hover-bg);
  border-color: var(--nav-cta-hover-border);
}

.nav-end {
  display: flex;
  align-items: center;
  gap: 8px;
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  padding: 0;
  border-radius: 8px;
  border: 1px solid var(--border-hover);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.theme-toggle:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
  background: var(--nav-cta-hover-bg);
}

.theme-toggle .icon-moon {
  display: none;
}

[data-theme='light'] .theme-toggle .icon-sun {
  display: none;
}

[data-theme='light'] .theme-toggle .icon-moon {
  display: block;
}

#menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

#menu-toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--text-muted);
  transition: all 0.3s;
}

#mobile-menu {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: var(--mobile-nav-bg);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  z-index: 99;
  flex-direction: column;
  padding: 16px 24px 24px;
  gap: 4px;
}

#mobile-menu.open {
  display: flex;
}

#mobile-menu a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  transition: color 0.2s;
}

#mobile-menu a:last-child {
  border-bottom: none;
}

#mobile-menu a:hover {
  color: var(--text-primary);
}

/* ====== HERO ====== */
#hero {
  padding: 160px 0 100px;
  border-bottom: 1px solid var(--border);
}

.hero-label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-dim);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero-heading {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-muted);
  max-width: 800px;
  margin-bottom: 24px;
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--text-dim);
  max-width: 540px;
  line-height: 1.7;
  margin-bottom: 36px;
}

.hero-name {
  color: var(--text-primary);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 64px;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 12px 24px;
  font-size: 0.88rem;
  font-weight: 500;
  font-family: var(--font);
  border-radius: 10px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s;
}

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

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

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

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

.hero-stats {
  display: flex;
  align-items: center;
  gap: 40px;
}

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

a.stat-link {
  display: block;
  text-decoration: none;
  cursor: pointer;
  border-radius: 10px;
  padding: 4px 10px;
  margin: -4px -10px;
  transition: background 0.2s ease;
}

a.stat-link:hover {
  background: var(--stat-link-hover);
}

a.stat-link:focus-visible {
  outline: 1px solid var(--focus-ring);
  outline-offset: 3px;
}

/* ====== SECTIONS ====== */
section {
  padding: 100px 0;
  border-bottom: 1px solid var(--border);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-dim);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.label-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-dim);
}

.section-heading {
  font-size: clamp(1.6rem, 3.5vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.03em;
  color: var(--text-muted);
  margin-bottom: 48px;
}

/* ====== EXPERIENCE ====== */
.exp-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.exp-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px 32px;
  transition: border-color 0.3s;
}

.exp-card:hover {
  border-color: var(--border-hover);
}

.exp-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
  gap: 16px;
}

.exp-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.exp-role {
  font-size: 0.85rem;
  color: var(--text-dim);
}

.exp-date {
  font-size: 0.78rem;
  color: var(--text-dim);
  white-space: nowrap;
  flex-shrink: 0;
  padding-top: 2px;
}

.exp-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.exp-list li {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  padding-left: 16px;
  position: relative;
}

.exp-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--text-dim);
}

.exp-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.exp-tags span {
  font-size: 0.72rem;
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  color: var(--text-dim);
}

/* ====== PROJECTS ====== */
.project-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  transition: border-color 0.3s;
}

.project-card:hover {
  border-color: var(--border-hover);
}

.project-card-inner {
  padding: 28px 32px;
}

.project-badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--project-badge-bg);
  color: var(--text-muted);
  border: 1px solid var(--border);
  margin-bottom: 16px;
}

.project-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.project-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
  max-width: 600px;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.project-tags span {
  font-size: 0.72rem;
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  color: var(--text-dim);
}

.project-link {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

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

.project-card.featured {
  grid-column: 1 / -1;
  background: var(--bg-elevated);
}

/* ====== SKILLS ====== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.skill-group {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px 28px;
  transition: border-color 0.3s;
}

.skill-group:hover {
  border-color: var(--border-hover);
}

.skill-group h4 {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 14px;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.skill-tags span {
  font-size: 0.82rem;
  padding: 6px 14px;
  border-radius: 8px;
  background: var(--skill-tag-bg);
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: all 0.2s;
}

.skill-tags span:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
  background: var(--skill-tag-hover-bg);
}

/* ====== EDUCATION ====== */
.edu-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.edu-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px 28px;
  transition: border-color 0.3s;
}

.edu-card:hover {
  border-color: var(--border-hover);
}

.edu-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
  line-height: 1.4;
}

.edu-degree {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.edu-meta {
  display: flex;
  gap: 16px;
}

.edu-meta span {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* ====== CONTACT ====== */
#contact {
  border-bottom: none;
}

.contact-sub {
  font-size: 0.95rem;
  color: var(--text-dim);
  margin-top: -32px;
  margin-bottom: 40px;
  max-width: 460px;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.contact-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  text-decoration: none;
  transition: all 0.2s;
}

.contact-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-elevated);
}

.contact-card-label {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.contact-card-value {
  font-size: 0.92rem;
  color: var(--text-primary);
  font-weight: 500;
}

/* ====== FOOTER ====== */
footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

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

.footer-name {
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.footer-note {
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* ====== SCROLL ANIMATIONS ====== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ====== RESPONSIVE ====== */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  #menu-toggle {
    display: flex;
  }

  #hero {
    padding: 120px 0 72px;
  }

  .hero-heading {
    font-size: 1.8rem;
  }

  .hero-stats {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }

  .stat-divider {
    width: 40px;
    height: 1px;
  }

  .hero-actions {
    flex-direction: column;
    margin-bottom: 48px;
  }

  .btn {
    justify-content: center;
  }

  section {
    padding: 64px 0;
  }

  .section-heading {
    margin-bottom: 32px;
  }

  .exp-card {
    padding: 20px;
  }

  .exp-card-header {
    flex-direction: column;
    gap: 4px;
  }

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

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

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

  .footer-inner {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-heading {
    font-size: 1.5rem;
  }

  .section-heading {
    font-size: 1.4rem;
  }

  .stat-number {
    font-size: 1.6rem;
  }
}