:root {
  --bg: #ffffff;
  --text: #171717;
  --text-muted: #737373;
  --link: #171717;
  --link-underline: #d4d4d4;
  --border: #e5e5e5;
}

[data-theme="dark"] {
  --bg: #171717;
  --text: #fafafa;
  --text-muted: #a3a3a3;
  --link: #fafafa;
  --link-underline: #525252;
  --border: #262626;
}

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

html {
  font-size: 18px;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  font-family: "Source Code Pro", ui-monospace, monospace;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

/* Staggered load animation */
@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-first {
  animation: fade-up 0.5s ease-out forwards;
  opacity: 0;
}

.animate-second {
  animation: fade-up 0.5s ease-out 0.08s forwards;
  opacity: 0;
}

.animate-third {
  animation: fade-up 0.5s ease-out 0.16s forwards;
  opacity: 0;
}

.animate-fourth {
  animation: fade-up 0.5s ease-out 0.24s forwards;
  opacity: 0;
}

.animate-fifth {
  animation: fade-up 0.5s ease-out 0.32s forwards;
  opacity: 0;
}

/* Mobile-first: base = small screens */
.page {
  margin: 0 auto;
  padding: 1.25rem 1rem 4rem;
  max-width: 100%;
}

.theme-toggle {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  font-family: inherit;
  font-size: 0.875rem;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.35rem 0;
  display: inline-flex;
  align-items: baseline;
  gap: 0.35rem;
  color: var(--text-muted);
  z-index: 10;
}

.theme-option {
  color: var(--text-muted);
  transition: color 0.2s;
}

.theme-toggle .theme-option[data-option="light"] {
  color: var(--text);
}

.theme-toggle .theme-option[data-option="dark"] {
  color: var(--text-muted);
}

[data-theme="dark"] .theme-toggle .theme-option[data-option="light"] {
  color: var(--text-muted);
}

[data-theme="dark"] .theme-toggle .theme-option[data-option="dark"] {
  color: var(--text);
}

.theme-toggle:hover .theme-option {
  color: var(--text);
}

.hero {
  margin-bottom: 3.5rem;
}

.name {
  font-size: 1.75rem;
  font-weight: 600;
  margin: 0 0 0.25rem;
  letter-spacing: -0.02em;
}

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

.name a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.role {
  margin: 0;
  font-size: 1rem;
  color: var(--text-muted);
}

.role a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--link-underline);
  transition: text-decoration-color 0.2s;
}

.role a:hover {
  text-decoration-color: var(--text);
}

section {
  margin-bottom: 2.5rem;
}

section h2 {
  font-family: "Source Code Pro", monospace;
  font-optical-sizing: auto;
  font-weight: 600;
  font-style: normal;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text);
  margin: 0 0 0.75rem;
}

section p {
  margin: 0 0 0.75rem;
  color: var(--text-muted);
}

section p:last-child {
  margin-bottom: 0;
}

section ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

section li {
  margin-bottom: 0.5rem;
}

section li:last-child {
  margin-bottom: 0;
}

section a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--link-underline);
  transition: text-decoration-color 0.2s;
}

section a:hover {
  text-decoration-color: var(--text);
}

.case-studies a {
  color: var(--text-muted);
}

.case-studies a:hover {
  color: var(--text);
}

.connect a {
  color: var(--text-muted);
}

.connect a:hover {
  color: var(--text);
}

/* Case study pages */
.back-link {
  margin: 0 0 1.5rem;
  font-size: 0.9rem;
}

.back-link a {
  color: var(--text-muted);
  text-decoration: none;
}

.back-link a:hover {
  color: var(--text);
}

.case-page .meta {
  margin: 0.25rem 0 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.case-page .bullets {
  list-style: disc;
  padding-left: 1.25rem;
  color: var(--text-muted);
}

.case-page .routes {
  margin: 0;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow-x: auto;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.case-page .routes code {
  font-family: inherit;
}

.footer {
  padding-top: 2rem;
}

.footer p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Desktop: enhance from mobile base */
@media (min-width: 640px) {
  .page {
    max-width: 42rem;
    padding: 2rem 1.5rem 5rem;
  }

  .theme-toggle {
    bottom: 1.5rem;
    right: 1.5rem;
    font-size: 0.9rem;
  }
}