@import url('https://fonts.googleapis.com/css2?family=Archivo:wght@400;500;600;700;800&family=Space+Grotesk:wght@300;400;500;600;700&display=swap');

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

html {
  scroll-behavior: smooth;
}

/* Tokens */
:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --surface2: #f4f4f5;
  --border: #e4e4e7;
  --text: #09090b;
  --muted: #71717a;
  --accent: #2563eb;
  --accent-h: #1d4ed8;
  --accent-bg: #eff6ff;
  --font-head: 'Archivo', sans-serif;
  --font-body: 'Space Grotesk', sans-serif;
  --radius: 12px;
  --max: 1100px;
}

/* Base */
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Layout */
.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 2rem;
  position: relative;
  z-index: 1;
}

/* Nav */
nav {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 100;
  background: var(--surface);
  padding: 1.25rem 0;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s;
}

nav.scrolled {
  border-color: var(--border);
}

nav .inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent);
  text-decoration: none;
  font-family: var(--font-body);
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
  cursor: pointer;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--text);
}

/* Hero */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem 0 4rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  background: var(--accent-bg);
  padding: 0.35rem 0.8rem;
  border-radius: 99px;
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeUp 0.6s 0.1s forwards;
}

.hero-name {
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 800;
  font-family: var(--font-head);
  line-height: 0.95;
  letter-spacing: -0.02em;
  opacity: 0;
  animation: fadeUp 0.6s 0.2s forwards;
}

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

.hero-role {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--muted);
  font-weight: 500;
  margin-top: 1.25rem;
  opacity: 0;
  animation: fadeUp 0.6s 0.3s forwards;
}

.hero-stack {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 0.5rem;
  letter-spacing: 0.04em;
  opacity: 0;
  animation: fadeUp 0.6s 0.35s forwards;
}

.hero-desc {
  font-size: 0.95rem;
  color: var(--muted);
  max-width: 420px;
  line-height: 1.8;
  margin-top: 1rem;
  opacity: 0;
  animation: fadeUp 0.6s 0.4s forwards;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  margin-top: 2.5rem;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp 0.6s 0.5s forwards;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.75rem;
  border-radius: var(--radius);
  font-family: var(--font-head);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--accent-h);
  transform: translateY(-2px);
}

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

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--muted);
  background: var(--surface2);
  transform: translateY(-2px);
}

/* Code card */
.hero-visual {
  opacity: 0;
  animation: fadeUp 0.6s 0.4s forwards;
}

.code-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
}

.code-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface2);
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot-r {
  background: #ff5f57;
}

.dot-y {
  background: #ffbd2e;
}

.dot-g {
  background: #28c840;
}

.code-filename {
  font-family: var(--font-body);
  font-size: 0.7rem;
  color: var(--muted);
  margin-left: 0.5rem;
}

.code-body {
  padding: 1.5rem;
  font-family: var(--font-body);
  font-size: 0.8rem;
  line-height: 2;
}

.c-kw {
  color: #7c3aed;
}

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

.c-str {
  color: #059669;
}

.c-num {
  color: #d97706;
}

.c-cm {
  color: var(--muted);
  font-style: italic;
}

.c-obj {
  color: #0891b2;
}

.cursor {
  display: inline-block;
  width: 2px;
  height: 1em;
  background: var(--accent);
  vertical-align: middle;
  animation: blink 1s step-end infinite;
}

/* Sections */
section {
  padding: 6rem 0;
}

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

.section-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-body);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, var(--border), transparent);
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  font-family: var(--font-head);
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 1rem;
}

.section-sub {
  color: var(--muted);
  font-size: 0.95rem;
  max-width: 500px;
  line-height: 1.8;
}

.section-sub.centered {
  margin: 0 auto;
  text-align: center;
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 5rem;
  align-items: start;
}

.about-img-wrap {
  position: relative;
  aspect-ratio: 3 / 4;
  max-width: 340px;
}

.about-img-placeholder {
  width: 100%;
  height: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  color: var(--muted);
  font-size: 0.8rem;
  font-family: var(--font-body);
}

.about-accent-box {
  position: absolute;
  right: -1rem;
  bottom: -1rem;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  font-size: 0.75rem;
  font-weight: 700;
  font-family: var(--font-body);
  line-height: 1.4;
}

.about-photo-note {
  font-size: 0.65rem;
  opacity: 0.6;
}

.about-experience-count {
  font-size: 1.4rem;
  font-weight: 800;
}

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

.about-text p {
  color: var(--muted);
  line-height: 1.9;
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.edu-list {
  margin-top: 2rem;
}

.edu-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1rem 0;
  border-top: 1px solid var(--border);
}

.edu-year {
  font-family: var(--font-body);
  font-size: 0.7rem;
  color: var(--accent);
  white-space: nowrap;
  padding-top: 0.2rem;
  min-width: 70px;
}

.edu-name {
  font-weight: 600;
  font-size: 0.9rem;
}

.edu-place {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.2rem;
}

/* Projects */
.projects-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 3rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.project-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s;
}

.project-card:hover,
.project-card:focus-within {
  border-color: var(--border);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

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

.project-card.featured {
  grid-column: span 2;
  background: var(--accent-bg);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.tag {
  font-family: var(--font-body);
  font-size: 0.65rem;
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  background: var(--surface2);
  color: var(--muted);
  border: 1px solid var(--border);
  letter-spacing: 0.05em;
}

.tag.accent {
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 25%, transparent);
}

.project-title {
  font-size: 1.25rem;
  font-weight: 700;
  font-family: var(--font-head);
  margin-bottom: 0.5rem;
}

.project-desc {
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.7;
  flex: 1;
}

.project-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}

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

.project-link {
  font-family: var(--font-body);
  font-size: 0.7rem;
  color: var(--muted);
  text-decoration: none;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  transition: color 0.2s;
  cursor: pointer;
}

.project-link:hover,
.project-link:focus-visible {
  color: var(--accent);
}

.project-arrow {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  transition: all 0.2s;
}

.project-card:hover .project-arrow,
.project-card:focus-within .project-arrow {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* Skills */
.skills-section {
  display: flex;
  flex-direction: column;
  gap: 3rem;
  margin-top: 3rem;
}

.skill-group-label {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  font-family: var(--font-body);
  margin-bottom: 1rem;
  font-weight: 600;
}

.skill-tiles {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: 1rem;
}

.skill-tile {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 0.75rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  cursor: default;
}

.skill-tile:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 12px rgba(37, 99, 235, 0.1);
}

.skill-tile svg {
  width: 24px;
  height: 24px;
}
.skill-tile i {
  font-size: 2rem;
  line-height: 1;
}

.skill-tile-name {
  font-size: 0.7rem;
  color: var(--muted);
  font-family: var(--font-body);
  text-align: center;
  line-height: 1.3;
}

/* Contact */
#contact {
  text-align: center;
  background: radial-gradient(
    ellipse at 50% 100%,
    color-mix(in srgb, var(--accent) 6%, transparent),
    transparent 70%
  );
}

.contact-email {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 800;
  font-family: var(--font-head);
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
  border-bottom: 2px solid var(--accent);
  transition: color 0.2s;
  display: inline-block;
  margin: 2rem 0;
}

.contact-email:hover,
.contact-email:focus-visible {
  color: var(--accent);
}

.social-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.social-link {
  font-family: var(--font-body);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: color 0.2s;
  cursor: pointer;
}

.social-link:hover,
.social-link:focus-visible {
  color: var(--accent);
}

.social-divider {
  color: var(--border);
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  text-align: center;
}

footer p {
  font-family: var(--font-body);
  font-size: 0.7rem;
  color: var(--muted);
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

/* Animations */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes blink {
  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* Responsive */
@media (max-width: 768px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .hero-visual {
    order: -1;
  }

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

  .about-img-wrap {
    max-width: 100%;
  }

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

  .project-card.featured {
    grid-column: span 1;
  }

  .nav-links {
    display: none;
  }
}