:root {
  --white: #ffffff;
  --black: #0a0a0a;
  --gray-2: #333333;
  --gray-3: #555555;
  --gray-4: #888888;
  --gray-5: #bbbbbb;
  --gray-6: #e5e5e5;
  --mono: 'IBM Plex Mono', 'SF Mono', 'Menlo', monospace;
  --sans: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --space-xs: 4px;
  --space-sm: 8px;
  --grid-gap: clamp(6px, 0.8vw, 12px);
  --pad: clamp(20px, 4vw, 48px);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
::selection { background: var(--black); color: var(--white); }
html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--mono);
  font-weight: 400;
  font-size: 0.875rem;
  color: var(--gray-3);
  background: var(--white);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

main { flex: 1; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color 0.25s ease; }
:focus-visible { outline: 1px solid var(--black); outline-offset: 2px; }

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--pad);
  background: var(--black);
  color: var(--white);
  padding: 6px 12px;
  font-size: 0.6875rem;
  z-index: 200;
}
.skip-link:focus { top: 4px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 2rem;
  padding: 0 var(--pad);
  height: 56px;
}

.site-name {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.75rem;
  color: var(--black);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.site-nav { display: flex; gap: 1.75rem; }

.site-nav a {
  font-family: var(--mono);
  font-size: 0.6875rem;
  color: var(--gray-4);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  position: relative;
  transition: color 0.25s ease;
}
.site-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--black);
  transition: width 0.3s ease;
}
.site-nav a:hover { color: var(--black); }
.site-nav a:hover::after { width: 100%; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 20px;
  height: 14px;
  position: relative;
}
.nav-toggle span {
  display: block;
  width: 100%;
  height: 1px;
  background: var(--black);
  position: absolute;
  left: 0;
  transition: all 0.3s ease;
}
.nav-toggle span:first-child { top: 0; }
.nav-toggle span:last-child { bottom: 0; }
.nav-toggle.open span:first-child { top: 50%; transform: rotate(45deg); }
.nav-toggle.open span:last-child { bottom: 50%; transform: rotate(-45deg); }

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--grid-gap);
  padding: var(--grid-gap) var(--pad) clamp(3rem, 6vw, 5rem);
}

.project-card { display: block; }
.project-card:nth-child(2n+1) { grid-column: 1; }
.project-card:nth-child(2n)   { grid-column: 2; }

.project-card-image { overflow: hidden; position: relative; }

.project-card-image img {
  width: 100%;
  aspect-ratio: 4/5;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.project-card:hover .project-card-image img { transform: scale(1.03); }

.project-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(10,10,10,0.75) 0%, rgba(10,10,10,0.2) 50%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: clamp(16px, 2.5vw, 32px);
  opacity: 0;
  transition: opacity 0.35s ease;
}

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

.project-card-overlay .project-card-line {
  width: 24px;
  height: 1px;
  background: rgba(255,255,255,0.35);
  margin-bottom: var(--space-sm);
}

.project-card-overlay .project-card-code {
  display: block;
  font-family: var(--mono);
  font-size: 0.5625rem;
  color: rgba(255,255,255,0.5);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--space-xs);
}

.project-card-overlay .project-card-title {
  font-family: var(--sans);
  font-weight: 500;
  font-size: clamp(0.875rem, 1.4vw, 1.125rem);
  color: var(--white);
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-xs);
}

.project-card-overlay .project-card-desc {
  font-family: var(--sans);
  font-weight: 300;
  font-size: 0.6875rem;
  color: rgba(255,255,255,0.65);
  line-height: 1.5;
  margin-bottom: 0.375rem;
}

.project-card-overlay .project-card-cat {
  font-family: var(--mono);
  font-size: 0.5625rem;
  color: rgba(255,255,255,0.45);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.project-header {
  padding: clamp(2.5rem, 5vw, 4rem) var(--pad) clamp(1.25rem, 2.5vw, 2rem);
  max-width: 680px;
}

.project-header-line {
  width: 32px;
  height: 1px;
  background: var(--gray-6);
  margin-bottom: 1.25rem;
}

.project-header-code {
  display: block;
  font-family: var(--mono);
  font-size: 0.625rem;
  color: var(--gray-5);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.625rem;
}

.project-header h1 {
  font-family: var(--sans);
  font-weight: 500;
  font-size: clamp(1.75rem, 4vw, 3rem);
  color: var(--black);
  letter-spacing: -0.03em;
  line-height: 1.08;
  margin-bottom: 1rem;
}

.project-header-cat {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.625rem;
  color: var(--gray-4);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.875rem;
}

.project-header-desc {
  font-family: var(--sans);
  font-weight: 300;
  font-size: 0.9375rem;
  color: var(--gray-3);
  line-height: 1.75;
  max-width: 520px;
}

.project-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--grid-gap);
  padding: 0 var(--pad) clamp(3rem, 6vw, 5rem);
}

.project-gallery-item { overflow: hidden; }
.project-gallery-item:nth-child(2n+1) { grid-column: 1; }
.project-gallery-item:nth-child(2n)   { grid-column: 2; }

.project-gallery-item img {
  width: 100%;
  aspect-ratio: 4/5;
  object-fit: cover;
  cursor: zoom-in;
  transition: transform 0.5s ease;
}

.project-gallery-item:hover img { transform: scale(1.03); }

.contact-page {
  max-width: 480px;
  padding: clamp(4rem, 8vw, 6rem) var(--pad);
}

.contact-page h1 {
  font-family: var(--sans);
  font-weight: 500;
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  color: var(--black);
  letter-spacing: -0.03em;
  line-height: 1.08;
  margin-bottom: 0.875rem;
}

.contact-page h1::after {
  content: '';
  display: block;
  width: 28px;
  height: 1px;
  background: var(--gray-6);
  margin-top: 0.875rem;
}

.contact-body p {
  font-family: var(--sans);
  font-weight: 300;
  font-size: 0.9375rem;
  color: var(--gray-3);
  line-height: 1.8;
  margin-bottom: 0.875rem;
}

.contact-links {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--gray-6);
  display: flex;
  gap: 1.75rem;
}

.contact-links a {
  font-family: var(--mono);
  font-size: 0.6875rem;
  color: var(--gray-4);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  transition: color 0.25s ease;
}
.contact-links a:hover { color: var(--black); }

.site-footer {
  padding: 1.75rem var(--pad);
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.625rem;
  color: var(--gray-5);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.footer-links { display: flex; gap: 1.5rem; }
.footer-links a { color: var(--gray-5); transition: color 0.25s ease; }
.footer-links a:hover { color: var(--gray-2); }

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(10,10,10,0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: zoom-out;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.lightbox.active { opacity: 1; pointer-events: auto; }
.lightbox img { max-width: 92vw; max-height: 92vh; object-fit: contain; }

.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.project-grid .reveal:nth-child(2n) { transition-delay: 0.1s; }
.project-gallery .reveal:nth-child(2n) { transition-delay: 0.1s; }

@media (max-width: 1024px) {
  .project-grid { grid-template-columns: repeat(2, 1fr); }
  .project-card:nth-child(2n+1) { grid-column: 1; }
  .project-card:nth-child(2n)   { grid-column: 2; }
  .project-gallery { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .site-nav {
    position: fixed;
    inset: 0;
    top: 56px;
    background: var(--white);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
  }
  .site-nav.open { opacity: 1; pointer-events: auto; }
  .site-nav a { font-size: 0.8125rem; line-height: 3; }
  .nav-toggle { display: block; }
  .project-grid { grid-template-columns: 1fr; max-width: 480px; }
  .project-card:nth-child(n) { grid-column: auto; }
  .project-gallery { grid-template-columns: 1fr; }
  .project-gallery-item:nth-child(n) { grid-column: auto; }
}

/* Scroll hint — desktop only */
.scroll-hint {
  display: none;
}
@media (min-width: 769px) {
  .scroll-hint {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 50;
    opacity: 1;
    transition: opacity 0.6s ease;
    pointer-events: none;
  }
  .scroll-hint.hidden { opacity: 0; }
  .scroll-hint-label {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: #888;
  }
  .scroll-hint-arrow {
    display: block;
    width: 1px;
    height: 40px;
    background: #888;
    transform-origin: top;
    animation: scroll-line 1.4s ease-in-out infinite;
  }
}

@keyframes scroll-line {
  0%   { transform: scaleY(0); opacity: 1; }
  60%  { transform: scaleY(1); opacity: 1; }
  100% { transform: scaleY(1); opacity: 0; }
}

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