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

:root {
  --bg: #fafafa;
  --text: #1a1a1a;
  --text-light: #666;
  --accent: #0055ff;
  --border: #e0e0e0;
  --radius: 8px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 48px;
}

.site-header .container {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px;
}

.site-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

.site-subtitle {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-right: auto;
}

.site-nav {
  display: flex;
  gap: 16px;
}

.site-nav a {
  color: var(--text-light);
  text-decoration: none;
  font-size: 0.9rem;
}

.site-nav a:hover {
  color: var(--accent);
}

.language-switcher {
  display: flex;
  gap: 4px;
  font-size: 0.85rem;
  padding-left: 12px;
  margin-left: 4px;
  border-left: 1px solid var(--border);
}

.language-switcher a {
  color: var(--text-light);
  text-decoration: none;
  padding: 2px 6px;
  border-radius: 4px;
}

.language-switcher a.active {
  background: var(--text);
  color: #fff;
}

/* Homepage intro */
.intro {
  margin-bottom: 32px;
}

.intro h1 {
  font-size: 1.5rem;
  font-weight: 600;
}

/* Filter bar */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.filter-btn {
  padding: 6px 16px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 20px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
}

.filter-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.filter-btn.active {
  background: var(--text);
  color: #fff;
  border-color: var(--text);
}

/* Portfolio grid */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.portfolio-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
}

.portfolio-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

.portfolio-item a {
  text-decoration: none;
  color: inherit;
  display: block;
}

.portfolio-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.placeholder-img {
  width: 100%;
  height: 220px;
  background: linear-gradient(135deg, #f0f0f0, #e0e0e0);
}

.item-info {
  padding: 16px;
}

.item-info h2 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.item-cats {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 8px;
}

.cat-tag {
  font-size: 0.75rem;
  padding: 2px 8px;
  background: var(--bg);
  border-radius: 10px;
  color: var(--text-light);
}

.item-info p {
  font-size: 0.85rem;
  color: var(--text-light);
}

/* Video embeds */
.video-embed {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  margin: 16px 0;
  border-radius: var(--radius);
}

.video-embed iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* Single project page */
.project-header {
  margin-bottom: 32px;
}

.project-header h1 {
  font-size: 1.75rem;
  margin-bottom: 8px;
}

.project-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--text-light);
}

.project-content {
  max-width: 720px;
}

.project-content h2 {
  font-size: 1.25rem;
  margin: 32px 0 12px;
}

.project-content h3 {
  font-size: 1.1rem;
  margin: 24px 0 8px;
}

.project-content p {
  margin-bottom: 16px;
}

.project-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  margin: 16px 0;
}

.project-content a {
  color: var(--accent);
}

.project-tools,
.project-code {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.project-tools ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}

.project-tools li {
  padding: 4px 12px;
  background: var(--bg);
  border-radius: 16px;
  font-size: 0.85rem;
}

.project-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.project-nav a {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.9rem;
}

.project-nav a:hover {
  text-decoration: underline;
}

/* Pages */
.page {
  max-width: 720px;
}

.page-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  margin: 16px 0;
}

.page-content h2 {
  font-size: 1.25rem;
  margin: 32px 0 12px;
}

.page-content ul {
  margin: 8px 0 16px 24px;
}

.page-content li {
  margin-bottom: 4px;
}

/* Footer */
.site-footer {
  margin-top: 64px;
  padding: 24px 0;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-light);
}

/* Responsive */
@media (max-width: 640px) {
  .portfolio-grid {
    grid-template-columns: 1fr;
  }

  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-nav {
    margin-top: 8px;
  }
}