:root {
  --bg: #ffffff;
  --bg-alt: #f6f5f3;
  --text: #1f2328;
  --text-muted: #5b6168;
  --accent: #2f5d8a;
  --border: #e4e2de;
  --max-width: 760px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

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

a:hover {
  text-decoration: underline;
}

/* Header */

.site-header {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(6px);
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
  flex-wrap: wrap;
  gap: 8px;
}

.brand {
  font-weight: 600;
  color: var(--text);
  font-size: 1.05rem;
}

.brand:hover {
  text-decoration: none;
}

.nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.nav a {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.nav a:hover {
  color: var(--accent);
  text-decoration: none;
}

/* Hero */

.hero {
  padding: 64px 0 48px;
}

.hero h1 {
  margin: 0 0 6px;
  font-size: 2.1rem;
}

.tagline {
  margin: 0 0 20px;
  color: var(--text-muted);
  font-size: 1.05rem;
}

.intro {
  max-width: 640px;
  font-size: 1.02rem;
}

/* Sections */

.section {
  padding: 48px 0;
}

.section.alt {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section h2 {
  margin: 0 0 28px;
  font-size: 1.4rem;
}

/* Experience / Education entries */

.entry {
  margin-bottom: 28px;
}

.entry:last-child {
  margin-bottom: 0;
}

.entry-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 4px 16px;
}

.entry-head h3 {
  margin: 0;
  font-size: 1.05rem;
}

.entry-date {
  color: var(--text-muted);
  font-size: 0.9rem;
  white-space: nowrap;
}

.entry-org {
  margin: 2px 0 10px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.entry ul {
  margin: 0;
  padding-left: 20px;
}

.entry li {
  margin-bottom: 4px;
}

/* Projects — card grid on index.html */

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

.project-card {
  display: block;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

a.project-card:hover {
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}

.project-card img {
  width: 100%;
  height: 170px;
  object-fit: cover;
  display: block;
  border-bottom: 1px solid var(--border);
}

.project-card-body {
  padding: 18px 20px;
}

.project-card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  color: var(--text);
}

.project-card .blurb {
  margin: 0 0 10px;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.project-card .read-more {
  font-size: 0.88rem;
  color: var(--accent);
  font-weight: 600;
}

.project-card-placeholder {
  background: var(--bg-alt);
  border-style: dashed;
  display: flex;
  align-items: center;
}

.project-card-placeholder h3,
.project-card-placeholder .blurb {
  color: var(--text-muted);
}

/* Standalone project detail pages (projects/*.html) */

.project-detail {
  padding: 48px 0 64px;
}

.project-detail h1 {
  margin: 0 0 16px;
  font-size: 1.8rem;
}

.project-meta {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.project-meta li {
  margin-bottom: 4px;
}

.project-meta strong {
  color: var(--text);
}

.project-detail .project-images {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 28px;
}

.project-detail .project-images img {
  width: 100%;
  height: auto;
  border-radius: 6px;
  border: 1px solid var(--border);
  display: block;
}

.project-detail h2 {
  margin: 32px 0 12px;
  font-size: 1.2rem;
}

.project-detail p {
  margin: 0 0 12px;
}

/* Contact */

.contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.contact-list li {
  margin-bottom: 10px;
  font-size: 1rem;
}

/* Footer */

.site-footer {
  padding: 28px 0;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Responsive */

@media (max-width: 560px) {
  .hero {
    padding: 40px 0 32px;
  }

  .hero h1 {
    font-size: 1.7rem;
  }

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

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