/* ─── Custom properties ────────────────────────────────────── */
:root {
  --color-bg:           #f6f2ea;
  --color-surface:      #fffdf9;
  --color-surface-alt:  #efe8da;
  --color-text:         #211f1b;
  --color-muted:        #6f6a60;
  --color-accent:       #bf6a48;
  --color-accent-hover: #a85a3c;
  --color-accent-light: #f1ded0;
  --color-border:       #e2dbcc;

  --font-serif: 'DM Serif Display', Georgia, serif;
  --font-sans:  'DM Sans', system-ui, sans-serif;
  --font-mono:  'JetBrains Mono', 'IBM Plex Mono', ui-monospace, monospace;

  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  2rem;
  --space-lg:  4rem;
  --space-xl:  8rem;

  --radius-sm: 6px;
  --radius-md: 12px;

  --transition: 200ms ease;

  --max-width: 1080px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }

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

ul { list-style: none; }

/* ─── Utilities ─────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.section-heading {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-md);
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: 999px;
  transition: background var(--transition), transform var(--transition);
}

.btn:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
}

/* ─── Nav ────────────────────────────────────────────────────── */
.nav-wrapper {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--color-bg) 90%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 1rem;
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--color-text);
  transition: color var(--transition);
}

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

.nav-links {
  display: flex;
  gap: var(--space-md);
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-muted);
  transition: color var(--transition);
}

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

/* ─── Hero ───────────────────────────────────────────────────── */
.hero {
  padding-block: var(--space-xl);
  padding-top: calc(var(--space-xl) + var(--space-lg));
}

.hero-inner { max-width: 760px; }

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

.hero-heading {
  font-family: var(--font-serif);
  font-size: clamp(2.75rem, 6vw, 5rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin-bottom: var(--space-md);
}

.hero-heading em {
  font-style: italic;
  color: var(--color-accent);
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--color-muted);
  max-width: 560px;
  margin-bottom: var(--space-lg);
}

/* ─── About ──────────────────────────────────────────────────── */
.about {
  padding-block: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.about-photo-wrap {
  margin-bottom: var(--space-md);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  display: inline-block;
}

.about-photo {
  width: 100%;
  max-width: 340px;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center top;
  border-radius: var(--radius-md);
  display: block;
}

.about-bio p {
  color: var(--color-muted);
  margin-bottom: var(--space-sm);
}

.about-bio p:last-child { margin-bottom: 0; }

.about-skills {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.skill-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.skill-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px color-mix(in srgb, var(--color-accent) 12%, transparent);
}

.skill-icon {
  font-size: 1.25rem;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

.skill-card h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 400;
  margin-bottom: 0.25rem;
}

.skill-card p {
  font-size: 0.875rem;
  color: var(--color-muted);
}

/* ─── Work ───────────────────────────────────────────────────── */
.work {
  padding-block: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.work-filters {
  display: flex;
  gap: var(--space-xs);
  flex-wrap: wrap;
  margin-bottom: var(--space-lg);
}

.filter-btn {
  padding: 0.45rem 1.1rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: transparent;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-muted);
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

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

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

.work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-md);
}

.project-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition);
}

.project-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

.project-card:hover .project-thumb img {
  transform: scale(1.04);
}

.project-card.hidden {
  display: none;
}

.project-thumb {
  height: 150px;
  flex-shrink: 0;
  background: var(--color-accent-light);
}

/* Photo thumbnails */
.project-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.project-info {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 1.1rem 1.4rem 1.3rem;
}

.project-tags {
  display: flex;
  gap: var(--space-xs);
  margin-bottom: 0.75rem;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
}

.tag--ld          { background: #f1ded0; color: #7a4326; }
.tag--product     { background: #dde3d1; color: #3f4a2c; }
.tag--experiments { background: #e6dfe8; color: #4a3870; }
.tag--personal    { background: #e3dcc8; color: #5c4a1f; }

.project-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 400;
  line-height: 1.3;
  margin-bottom: 0.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.6em;
}

.project-desc {
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--color-muted);
  margin-bottom: 0.75rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  height: 4.5em;
}

.project-stat {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--color-accent);
  opacity: 0.85;
}

.project-link {
  display: inline-block;
  margin-top: 0.75rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  transition: color var(--transition);
}

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

.project-toggle {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: auto;
  padding-top: 0.9rem;
  border: none;
  background: none;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--color-muted);
  cursor: pointer;
  transition: color var(--transition);
}

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

.project-toggle-icon {
  position: relative;
  width: 0.6rem;
  height: 0.6rem;
  flex-shrink: 0;
}

.project-toggle-icon::before,
.project-toggle-icon::after {
  content: '';
  position: absolute;
  background: currentColor;
  transition: transform var(--transition);
}

.project-toggle-icon::before {
  top: 50%;
  left: 0;
  width: 100%;
  height: 1.5px;
  transform: translateY(-50%);
}

.project-toggle-icon::after {
  top: 0;
  left: 50%;
  width: 1.5px;
  height: 100%;
  transform: translateX(-50%);
}

/* ─── Work card detail overlay ──────────────────────────────── */
.project-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
}

.project-overlay[hidden] { display: none; }

.project-overlay-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(33, 31, 27, 0.55);
  backdrop-filter: blur(2px);
}

.project-overlay-panel {
  position: relative;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  max-width: 640px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  padding: var(--space-md);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.25);
  animation: overlay-in 0.2s ease;
}

@keyframes overlay-in {
  from { opacity: 0; transform: translateY(8px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.project-overlay-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 2rem;
  height: 2rem;
  border: none;
  background: var(--color-surface-alt);
  border-radius: 999px;
  font-size: 1.25rem;
  line-height: 1;
  color: var(--color-muted);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.project-overlay-close:hover { background: var(--color-accent-light); color: var(--color-text); }

.project-overlay-tags {
  display: flex;
  gap: var(--space-xs);
  margin-bottom: 0.75rem;
  padding-right: 2.5rem;
}

.project-overlay-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 400;
  margin-bottom: 1rem;
  padding-right: 2.5rem;
}

.project-overlay-body p {
  font-size: 0.95rem;
  color: var(--color-muted);
  margin-bottom: 0.9rem;
}

.project-overlay-body p:last-child { margin-bottom: 0; }

.project-overlay-body .project-stat {
  display: block;
  margin: 0.5rem 0 0.9rem;
}

.project-overlay-body .project-link {
  display: inline-block;
  margin-top: 0.25rem;
}

body.overlay-open { overflow: hidden; }

/* ─── Contact ────────────────────────────────────────────────── */
.contact {
  padding-block: var(--space-xl);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.contact-inner {
  max-width: 640px;
}

.contact-sub {
  font-size: 1.05rem;
  color: var(--color-muted);
  margin-bottom: var(--space-md);
}

.contact-links {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: var(--space-md);
  font-size: 0.9rem;
  color: var(--color-muted);
}

.contact-links a {
  font-weight: 500;
  color: var(--color-text);
  transition: color var(--transition);
}

.contact-links a:hover { color: var(--color-accent); }

/* ─── Footer ─────────────────────────────────────────────────── */
.footer {
  padding-block: var(--space-md);
  border-top: 1px solid var(--color-border);
}

.footer p {
  font-size: 0.8rem;
  color: var(--color-muted);
}

/* ─── Responsive ─────────────────────────────────────────────── */
@media (max-width: 720px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

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

  .hero {
    padding-top: calc(var(--space-xl));
  }
}

@media (max-width: 480px) {
  .nav-links {
    gap: var(--space-sm);
  }
}

/* ─── Live insights (xAPI) ───────────────────────────────────── */
.insights-section {
  padding: var(--space-lg) 0;
  display: none;
}

.insights-section.is-ready {
  display: block;
}

.insights-intro {
  max-width: 60ch;
  color: var(--color-muted);
  margin-bottom: var(--space-md);
}

.insights {
  display: none;
}

.insights.insights--ready {
  display: grid;
  gap: var(--space-md);
}

.insights-counters {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
}

.insight-stat {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-sm);
  text-align: center;
}

.insight-num {
  display: block;
  font-family: var(--font-serif);
  font-size: 2.6rem;
  line-height: 1;
  color: var(--color-accent);
}

.insight-cap {
  display: block;
  font-family: var(--font-mono);
  margin-top: var(--space-xs);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.insights-topics {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

.insights-sublabel {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: var(--space-sm);
}

.insights-topics ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-xs);
}

.insights-topics li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-border);
}

.insights-topics li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.insights-topics li em {
  font-style: normal;
  font-weight: 600;
  color: var(--color-accent);
}

.insights-caption {
  margin-top: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-muted);
  opacity: 0.8;
}

@media (max-width: 720px) {
  .insights-counters {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 400px) {
  .insights-counters {
    grid-template-columns: 1fr;
  }
}