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

:root {
  --secondary: #78716c;
  --mono: "JetBrains Mono", monospace;
  --transition: 0.2s ease;
}

body {
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition:
    background var(--transition),
    color var(--transition);
}

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ---- Nav ---- */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition:
    background var(--transition),
    border-color var(--transition);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.3px;
}
.nav-right {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-links {
  display: flex;
  gap: 28px;
}
.nav-links a {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-2);
  transition: color 0.15s;
}
.nav-links a:hover {
  color: var(--text);
}
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-3);
  padding: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  transition:
    color 0.15s,
    background 0.15s;
}
.theme-toggle:hover {
  color: var(--text);
  background: var(--accent-subtle);
}
.theme-toggle svg {
  width: 18px;
  height: 18px;
}
.icon-sun,
.icon-moon {
  display: none;
}
[data-theme="light"] .icon-moon {
  display: block;
}
[data-theme="dark"] .icon-sun {
  display: block;
}

/* ---- Hero ---- */
.hero {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 72px 24px 64px;
}
.hero h1 {
  letter-spacing: -1.5px;
}
.hero p {
  margin-top: 16px;
  color: var(--text-2);
  max-width: 520px;
}
.hero-cta {
  margin-top: 28px;
  display: flex;
  gap: 12px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  font-size: 13px;
  font-weight: 600;
  transition: all 0.15s;
  cursor: pointer;
  border: none;
  font-family: inherit;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent-hover);
}
[data-theme="dark"] .btn-primary {
  color: #0a0a0a;
}
.btn-outline {
  background: transparent;
  color: var(--text-2);
  border: 1px solid var(--border);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent-text);
}

/* ---- Sections ---- */
.section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px 72px;
}
.page-section {
  padding-top: 72px;
}
.section-label {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--accent);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.section-footer {
  margin-top: 24px;
  text-align: center;
}
.view-all-link {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-2);
  transition: color 0.15s;
}
.view-all-link:hover {
  color: var(--accent-text);
}

/* ---- Placeholder image ---- */
.image-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    var(--placeholder-bg) 25%,
    var(--placeholder-accent) 25%,
    var(--placeholder-accent) 50%,
    var(--placeholder-bg) 50%,
    var(--placeholder-bg) 75%,
    var(--placeholder-accent) 75%
  );
  background-size: 20px 20px;
}

/* ---- Card images ---- */
.card-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}
.card-image img,
.card-image svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.card-image.contain img,
.post-hero-image.contain img {
  object-fit: contain;
  background: var(--surface);
}

/* ---- Projects grid ---- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
}
.project-card {
  position: relative;
  border: 1px solid var(--border);
  background: var(--surface);
  transition:
    border-color var(--transition),
    box-shadow var(--transition),
    background var(--transition);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
}
.card-link::after {
  content: "";
  position: absolute;
  inset: 0;
}
.project-card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
}
[data-theme="dark"] .project-card:hover {
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.3);
}
.project-card .card-body {
  padding: 16px 20px 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.project-card h2,
.project-card h3 {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.2px;
}
.project-card p {
  margin-top: 6px;
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.6;
  flex: 1;
}
.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 14px;
}
.tag {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 400;
  padding: 3px 9px;
  background: var(--tag-bg);
  border-radius: 6px;
  color: var(--tag-text);
  transition:
    background var(--transition),
    color var(--transition);
}

/* ---- Blog grid ---- */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
}
.post-card {
  border: 1px solid var(--border);
  background: var(--surface);
  transition:
    border-color var(--transition),
    box-shadow var(--transition),
    background var(--transition);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.post-card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
}
[data-theme="dark"] .post-card:hover {
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.3);
}
.post-card .card-body {
  padding: 16px 20px 20px;
  display: flex;
  flex-direction: column;
}
.post-card h2,
.post-card h3 {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.2px;
}
.post-date {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-3);
  white-space: nowrap;
  margin-top: 6px;
}

/* ---- Project detail page ---- */
.project-detail,
.post-detail {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px 72px;
}
.project-hero-image,
.post-hero-image {
  width: 100%;
  aspect-ratio: 2 / 1;
  overflow: hidden;
  margin-top: 48px;
  margin-bottom: 32px;
}
.project-hero-image img,
.project-hero-image svg,
.post-hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.project-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.project-try-btn {
  position: relative;
  z-index: 1;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}
.project-detail-header,
.post-detail-header {
  margin-bottom: 32px;
}
.project-detail-header h1,
.post-detail-header h1 {
  font-size: 32px;
  letter-spacing: -1px;
}
.project-detail-header .project-tags {
  margin-top: 12px;
}
.post-detail-header .post-date {
  margin-top: 8px;
  display: block;
}
.project-detail-body,
.post-detail-body {
}
.project-detail-body p,
.post-detail-body p {
  color: var(--text-2);
}
.project-detail-body table,
.post-detail-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.95em;
  color: var(--text-2);
}
.project-detail-body th,
.post-detail-body th,
.project-detail-body td,
.post-detail-body td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.project-detail-body th,
.post-detail-body th {
  font-weight: 600;
  color: var(--text-1);
  border-bottom: 1px solid var(--border-hover);
  background: var(--surface-2);
}
.project-detail-body tr:last-child td,
.post-detail-body tr:last-child td {
  border-bottom: none;
}

/* ---- About ---- */
.about-content {
}
.about-content p {
  color: var(--text-2);
}
.about-content p:last-child {
  margin-bottom: 0;
}
.about-links {
  margin-top: 24px;
  display: flex;
  gap: 20px;
}
.about-links a {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-3);
  transition: color 0.15s;
}
.about-links a:hover {
  color: var(--accent);
}

/* ---- Footer ---- */
footer {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 24px 24px 32px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-3);
  transition: border-color var(--transition);
}

/* ---- Responsive ---- */
@media (max-width: 640px) {
  .hero h1 {
    font-size: 28px;
  }
  .hero {
    padding: 48px 24px 48px;
  }
  .projects-grid {
    grid-template-columns: 1fr;
  }
  .posts-grid {
    grid-template-columns: 1fr;
  }
  .nav-links {
    gap: 20px;
  }
  .project-detail-header h1,
  .post-detail-header h1 {
    font-size: 24px;
  }
}