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

:root {
  --color-bg: #121214;
  --color-surface: #1c1c1e;
  --color-border: #2c2c2e;
  --color-text: #f5f5f4;
  --color-text-secondary: #a8a29e;
  --color-text-tertiary: #57534e;
  --color-accent: #22c55e;
  --color-accent-light: #052e16;
  --color-binary: #86efac;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  --text-xs: clamp(0.75rem, 0.7rem + 0.15vw, 0.8125rem);
  --text-sm: clamp(0.8125rem, 0.77rem + 0.2vw, 0.875rem);
  --text-base: clamp(0.9375rem, 0.9rem + 0.2vw, 1rem);
  --text-2xl: clamp(1.5rem, 1.2rem + 1vw, 2rem);
  --space-xs: 0.125rem;
  --space-sm: 0.375rem;
  --space-md: 0.75rem;
  --space-lg: 1rem;
  --space-xl: 1.5rem;
  --space-2xl: 2rem;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
  min-height: 100vh;
}

a {
  color: var(--color-text);
  text-decoration: none;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

.nav {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-md) var(--space-xl);
  display: flex;
  align-items: center;
}

.nav__links {
  display: flex;
  gap: var(--space-xl);
  align-items: center;
}

.nav__link {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  letter-spacing: 0.02em;
  padding: 4px 10px;
  border: 1px solid transparent;
  border-radius: 3px;
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-text);
  border-color: var(--color-accent);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  z-index: 110;
}

.nav__toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--color-text);
}

.nav__toggle.open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav__toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav__toggle.open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

.mobile-menu {
  position: fixed;
  top: 40px;
  right: var(--space-xl);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  z-index: 99;
  display: flex;
  flex-direction: column;
  padding: var(--space-sm) 0;
  opacity: 0;
  pointer-events: none;
}

.mobile-menu.open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu a {
  font-size: var(--text-sm);
  color: var(--color-text);
  padding: var(--space-sm) var(--space-xl);
}

.mobile-menu a:hover {
  background: var(--color-surface);
}

.home-main {
  padding-top: var(--space-2xl);
  max-width: 680px;
  margin: 0 auto;
  padding-left: var(--space-xl);
  padding-right: var(--space-xl);
  position: relative;
  z-index: 1;
}

.home-intro {
  margin-bottom: var(--space-2xl);
}

.home-name {
  font-size: var(--text-2xl);
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.home-desc {
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-text-secondary);
}

.home-section {
  margin-bottom: var(--space-2xl);
}

.home-section:last-child {
  margin-bottom: 4rem;
  padding-bottom: var(--space-lg);
}

.home-section__title {
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-lg);
}

.entry {
  margin-bottom: var(--space-lg);
}

.entry__header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-lg);
  margin-bottom: var(--space-xs);
}

.entry__role {
  font-size: var(--text-sm);
  font-weight: 600;
  display: block;
}

.entry__org {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  display: block;
}

.entry__date {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  white-space: nowrap;
  flex-shrink: 0;
}

.entry__desc {
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-text-secondary);
  padding-left: 1rem;
}

.exp-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md);
  margin-bottom: var(--space-sm);
  border: 1px solid transparent;
  border-radius: 6px;
}

.exp-item:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-light);
}

.exp-logo {
  width: 40px;
  height: 40px;
  border-radius: 6px;
  object-fit: cover;
  flex-shrink: 0;
}

.exp-content {
  flex: 1;
  min-width: 0;
}

.exp-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-lg);
}

.project-item {
  border: 1px solid var(--color-border);
  border-radius: 6px;
  margin-bottom: var(--space-sm);
  cursor: pointer;
  overflow: hidden;
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md);
  min-height: 4.5rem;
}

.project-toggle {
  font-size: var(--text-2xl);
  font-weight: 300;
  color: var(--color-text-tertiary);
  flex-shrink: 0;
  line-height: 1;
  transition: transform 0.3s ease;
}

.project-item.active .project-toggle {
  transform: rotate(45deg);
}

.project-details {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.project-item.active .project-details {
  max-height: 500px;
}

.project-details-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding: 0 var(--space-md) var(--space-md);
}

.project-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 4px;
}

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

.photo-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
  position: relative;
  z-index: 1;
}

.photo-grid img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 2px;
}

.photo-grid img:first-child {
  grid-column: 1 / -1;
  aspect-ratio: 2 / 1;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.contact-entry {
  font-size: var(--text-sm);
}

.contact-link-inline {
  font-size: var(--text-sm);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 1px;
}

.contact-link-inline:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.binary-bg {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(to right, rgba(0,0,0,1) 0%, rgba(0,0,0,1) calc(50% - 370px), rgba(0,0,0,0.06) calc(50% - 340px), rgba(0,0,0,0.06) calc(50% + 340px), rgba(0,0,0,1) calc(50% + 370px), rgba(0,0,0,1) 100%);
  mask-image: linear-gradient(to right, rgba(0,0,0,1) 0%, rgba(0,0,0,1) calc(50% - 370px), rgba(0,0,0,0.06) calc(50% - 340px), rgba(0,0,0,0.06) calc(50% + 340px), rgba(0,0,0,1) calc(50% + 370px), rgba(0,0,0,1) 100%);
}

.page-contact .binary-bg {
  -webkit-mask-image: none;
  mask-image: none;
}

.binary-bg pre {
  font-family: 'Courier New', Courier, monospace;
  font-size: 14px;
  line-height: 1.2;
  color: var(--color-binary);
  margin: 0;
  white-space: pre;
  letter-spacing: 2px;
}

@media (max-width: 640px) {
  :root {
    --space-xl: 1.25rem;
  }

  .nav__links {
    display: none;
  }

  .nav__toggle {
    display: flex;
  }

  .entry__header {
    flex-direction: column;
    gap: 0;
  }

  .entry__date {
    order: -1;
  }

  .exp-top {
    flex-direction: column;
    gap: 0;
  }

  .exp-top .entry__date {
    order: -1;
  }

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

  .photo-grid img:first-child {
    aspect-ratio: 3 / 2;
  }

  .binary-bg {
    display: none;
  }

  .home-section:last-child {
    margin-bottom: var(--space-lg);
    padding-bottom: 0;
  }
}