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

:root {
  --bg: #0d1117;
  --surface: #161b22;
  --border: #30363d;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #58a6ff;
  --accent-hover: #79c0ff;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  padding: 2rem 2rem 0;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.02em;
  text-decoration: none;
}

.logo span {
  color: var(--muted);
}

nav {
  display: flex;
  gap: 1.25rem;
  margin-left: auto;
}

.nav-link {
  font-size: 0.875rem;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text);
}

.project-list {
  width: 100%;
  max-width: 560px;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

.project-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  text-decoration: none;
  color: var(--text);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  transition: background 0.15s;
}

.project-item:last-child {
  border-bottom: none;
}

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

.project-icon {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  flex-shrink: 0;
}

.project-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.project-title {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
}

.project-name {
  font-size: 0.9rem;
  font-weight: 600;
}

.project-url {
  font-size: 0.78rem;
  color: var(--accent);
}

.project-desc {
  font-size: 0.8rem;
  color: var(--muted);
}

.project-arrow {
  color: var(--muted);
  font-size: 1rem;
  transition: color 0.15s, transform 0.15s;
}

.project-item:hover .project-arrow {
  color: var(--accent);
  transform: translateX(3px);
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 2rem;
  gap: 3rem;
}

.hero {
  text-align: center;
  max-width: 520px;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.15;
  margin-bottom: 0.75rem;
}

.hero p {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.6;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  width: 100%;
  max-width: 560px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: border-color 0.15s;
}

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

.card-icon {
  font-size: 1.5rem;
  line-height: 1;
}

.card-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
}

.card-desc {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.5;
  flex: 1;
}

.card-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.75rem;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s;
}

.card-link:hover {
  color: var(--accent-hover);
}

.card-link::after {
  content: '';
  display: inline-block;
  width: 14px;
  height: 14px;
  background-color: currentColor;
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='M8 1v10M3 7l5 5 5-5M2 14h12' stroke='black' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-size: contain;
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='M8 1v10M3 7l5 5 5-5M2 14h12' stroke='black' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  mask-repeat: no-repeat;
  mask-size: contain;
}

footer {
  padding: 1.5rem 2rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
}