/* ── Reset & base ──────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:           #0a0a0a;
  --bg-card:      #111111;
  --bg-card-hover:#161616;
  --border:       rgba(255,255,255,0.07);
  --border-hover: rgba(255,255,255,0.18);
  --text-primary: #e1e8e0;
  --text-secondary:#bebebe;
  --text-dim:     #585855;
  --accent:       #6ad360;
  --accent-dim:   rgba(200,245,96,0.12);
  --tag-bar-h:    56px;
  --header-h:     56px;
  --font-body:    "DM Sans", sans-serif;
  --font-mono:    "DM Mono", monospace;
  --radius:       10px;
  --radius-sm:    6px;
  --transition:   0.22s ease;
}

html { font-size: 16px; }

body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-weight: 300;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
}

/* ── Header ─────────────────────────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(10,10,10,0.8);
  border-bottom: 0.5px solid var(--border);
  display: flex;
  align-items: center;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.header-inner {
  width: 100%;
  padding: 0 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.header-logo-link {
  display: flex;
  width: 32px;
  align-items: center;
  flex-shrink: 0;
  /* Optical gap between logo and name */
  margin-right: 0.1rem;
}

.header-logo {
  /* Match the cap-height of the name text beside it.
     20px font * ~1.6 line-height cap-height ratio ≈ 32px feels balanced. */
  height: 32px;
  width: auto;
  display: block;
  /* SVG fills inherit currentColor for monochrome logos */
  color: var(--text-primary);
}

.site-name {
  font-family: "Montserrat", sans-serif;
  font-size: 20px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--text-primary);
  white-space: nowrap;
  text-decoration: none;
}

/* Nav buttons */
.header-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 0.75rem;
}

.nav-btn {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 4px 10px;
  border-radius: 20px;
  border: 0.5px solid transparent;
  transition: color var(--transition), border-color var(--transition);
  white-space: nowrap;
}

.nav-btn:hover {
  color: var(--text-primary);
  border-color: var(--border);
}

.nav-btn.active {
  color: var(--accent);
  border-color: var(--border);
}

/* Social icons — pushed to the right */
.header-social {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 4px;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  color: var(--text-secondary);
  border: 0.5px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.social-link:hover {
  color: var(--text-primary);
  border-color: var(--border);
}

/* ── Main layout ─────────────────────────────────────────────────────────────── */
main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem calc(var(--tag-bar-h) + 1.5rem);
}

.version-footer {
  display: flex;
  justify-content: flex-end;
  padding: 0.5rem 1.25rem;
  opacity: 0.6;
}

/* ── Grid ────────────────────────────────────────────────────────────────────── */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 10px;
}

/* ── Tile ────────────────────────────────────────────────────────────────────── */
@keyframes tile-in {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.tile {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 0.5px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  /* Entrance */
  animation: tile-in 0.4s both;
  /* Filter transitions */
  transition:
    opacity var(--transition),
    transform var(--transition),
    border-color var(--transition),
    background var(--transition);
}

.tile:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-3px);
}

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

/* Fade out — base transition drives opacity/transform */
.tile.hiding {
  opacity: 0;
  transform: scale(0.96);
  pointer-events: none;
}

/* Out of flow after fade completes */
.tile.hidden {
  display: none;
}

/* Fade in — reset to natural values so base transition animates back in */
.tile.showing {
  opacity: 1;
  transform: scale(1);
  pointer-events: auto;
}

/* ── Tile thumbnail ─────────────────────────────────────────────────────────── */
.tile-thumb {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  position: relative;
  background: #111;
}

.tile-thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='0.035'/%3E%3C/svg%3E");
  pointer-events: none;
}

.tile-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ── Tile body ──────────────────────────────────────────────────────────────── */
.tile-body {
  padding: 0.875rem 1rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.tile-title {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.tile-desc {
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-secondary);
  flex: 1;
}

.tile-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 6px;
}

.tile-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.03em;
  padding: 2px 7px;
  border-radius: 20px;
  border: 0.5px solid var(--border);
  color: var(--text-dim);
  background: transparent;
}

/* ── Tag bar ─────────────────────────────────────────────────────────────────── */
.tag-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--tag-bar-h);
  background: rgba(10,10,10,0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 0.5px solid var(--border);
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 1.25rem;
  overflow-x: auto;
  scrollbar-width: none;
}

.tag-bar::-webkit-scrollbar { display: none; }

.tag-btn {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.04em;
  white-space: nowrap;
  padding: 5px 13px;
  border-radius: 20px;
  border: 0.5px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition:
    background var(--transition),
    color var(--transition),
    border-color var(--transition);
  flex-shrink: 0;
}

.tag-btn:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
}

.tag-btn.active {
  background: var(--tag-color);
  border-color: var(--border-hover);
  color: #0a0a0a;
  font-weight: 500;
}

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

/* ── Responsive ──────────────────────────────────────────────────────────────── */
@media (max-width: 480px) {
  .grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  main { padding: 1rem 0.75rem calc(var(--tag-bar-h) + 1rem); }
  .header-inner { padding: 0 0.75rem; }
  .tag-bar { padding: 0 0.75rem; }
  .tile-body { padding: 0.65rem; }
  .site-tagline { display: none; }
}

@media (max-width: 720px) {
  .site-name { display: none; }
}

@media (max-width: 320px) {
  .grid { grid-template-columns: 1fr; }
}

/* ── Reduced motion ──────────────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .tile { animation: none; }
  .tile, .tag-btn { transition: none; }
}

/* ── Project page ────────────────────────────────────────────────────────────── */
.project-main {
  max-width: 760px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

.project-back {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  text-decoration: none;
  margin-bottom: 1.5rem;
  transition: color var(--transition);
}

.project-back:hover { color: var(--text-primary); }

.project-hero {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 1.75rem;
  background: var(--bg-card);
  border: 0.5px solid var(--border);
}

.project-hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.project-header {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 0.5px solid var(--border);
}

.project-title {
  font-family: var(--font-body);
  font-size: 28px;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  line-height: 1.2;
}

.project-body {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.project-summary {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  font-weight: 300;
}

.project-body p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.project-link-wrap {
  margin-top: 0.5rem;
  padding-top: 1.5rem;
  border-top: 0.5px solid var(--border);
}

.project-link {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--accent);
  text-decoration: none;
  transition: opacity var(--transition);
}

.project-link:hover { opacity: 0.7; }

.project-error {
  padding: 2rem 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.project-error p {
  color: var(--text-secondary);
  font-size: 13px;
}

.project-error a {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  text-decoration: none;
}



/* ── Markdown prose ──────────────────────────────────────────────────────────── */
.project-prose {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.project-prose h1 {
  font-size: 24px;
  font-weight: 500;
  color: var(--text-primary);
}

.project-prose h2 {
  font-size: 20px;
  font-weight: 500;
  color: var(--text-primary);
  margin-top: 0.5rem;
}

.project-prose h3 {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
}

.project-prose p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.project-prose ul,
.project-prose ol {
  padding-left: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.project-prose li {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.project-prose pre {
  background: var(--bg-card);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  overflow-x: auto;
}

.project-prose code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
}

.project-prose pre code {
  color: var(--text-primary);
}

.project-prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.project-prose th,
.project-prose td {
  text-align: left;
  padding: 6px 12px;
  border-bottom: 0.5px solid var(--border);
  color: var(--text-secondary);
}

.project-prose th {
  color: var(--text-primary);
  font-weight: 500;
}

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

.project-prose a:hover {
  opacity: 0.7;
}

.project-prose hr {
  border: none;
  border-top: 0.5px solid var(--border);
}

/* ── Markdown Callouts ────────────────────────────────────────────────────────── */
.callout {
  border-radius: var(--radius-sm);
  border-left: 3px solid;
  padding: 0.75rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.callout-label {
  font-size: 12px;
  font-weight: 500;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.callout-body {
  font-size: 14px;
  line-height: 1.7;
}

/* Variants */
.callout-note    { background: rgba(255,255,255,0.04); border-color: var(--text-dim);      color: var(--text-secondary); }
.callout-note    .callout-label { color: var(--text-secondary); }

.callout-info    { background: rgba(100,180,255,0.07); border-color: #4aa8f0;              color: var(--text-secondary); }
.callout-info    .callout-label { color: #4aa8f0; }

.callout-warn    { background: rgba(255,200,80,0.07);  border-color: #f0b84a;              color: var(--text-secondary); }
.callout-warn    .callout-label { color: #f0b84a; }

.callout-danger  { background: rgba(255,90,90,0.07);   border-color: #f05a5a;              color: var(--text-secondary); }
.callout-danger  .callout-label { color: #f05a5a; }

/* ── Contact page ────────────────────────────────────────────────────────────── */
.contact-main {
  max-width: 760px;
  margin: 0 auto;
  padding: 2rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-title {
  font-size: 28px;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.contact-body {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-secondary);
}

/* ── Resume page ────────────────────────────────────────────────────────────── */
.resume-main {
  max-width: 760px;
  margin: 0 auto;
  padding: 2rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.resume-title {
  font-size: 28px;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.resume-main a {
  color: var(--accent);
  font-size: 24px;
  text-decoration: none;
  transition: opacity var(--transition);
}

.resume-main a:hover { opacity: 0.7; }