:root {
  --bg: #fafaf8;
  --bg-elevated: #ffffff;
  --text: #16161a;
  --text-muted: #5c5c63;
  --border: #e4e4e0;
  --accent: #2b2b8f;
  --accent-soft: #eceaff;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-w: 720px;
}

:root[data-theme="dark"] {
  --bg: #0e0e10;
  --bg-elevated: #17171a;
  --text: #ededee;
  --text-muted: #9a9aa2;
  --border: #2a2a2e;
  --accent: #8a8aff;
  --accent-soft: #1d1d3a;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e0e10;
    --bg-elevated: #17171a;
    --text: #ededee;
    --text-muted: #9a9aa2;
    --border: #2a2a2e;
    --accent: #8a8aff;
    --accent-soft: #1d1d3a;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background 0.2s ease, color 0.2s ease;
}

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

/* ---------- Topbar ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  max-width: 900px;
  margin: 0 auto;
  backdrop-filter: blur(8px);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
}

.logo {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
}

.nav {
  display: flex;
  gap: 1.75rem;
}

.nav a {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color 0.15s ease;
}

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

.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 999px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.15s ease;
}

.theme-toggle:hover { border-color: var(--text-muted); }

#iconMoon { display: none; }
:root[data-theme="dark"] #iconSun { display: none; }
:root[data-theme="dark"] #iconMoon { display: block; }

/* ---------- Layout ---------- */

main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 4rem 0;
  border-top: 1px solid var(--border);
  scroll-margin-top: 5.5rem;
}

.section-title {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 1.75rem;
  letter-spacing: 0.01em;
}

.section-title .num {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
}

.section-body p { color: var(--text-muted); margin: 0 0 1rem; }
.section-body p:last-child { margin-bottom: 0; }

/* ---------- Hero ---------- */

.hero {
  padding: 5rem 0 4rem;
}

.hero-photo {
  width: 180px;
  height: 180px;
  border-radius: 999px;
  object-fit: cover;
  margin-bottom: 1.75rem;
  border: 1px solid var(--border);
}

.eyebrow {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--accent);
  margin: 0 0 1rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.hero h1 {
  font-size: clamp(2.2rem, 6vw, 3.2rem);
  font-weight: 700;
  line-height: 1.1;
  margin: 0 0 1.25rem;
  letter-spacing: -0.02em;
}

.hero-sub {
  max-width: 560px;
  font-size: 1.05rem;
  color: var(--text-muted);
  margin: 0 0 2.25rem;
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.hero-links > a:not(.btn) {
  font-size: 0.92rem;
  color: var(--text-muted);
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.hero-links > a:not(.btn):hover {
  color: var(--text);
  border-color: var(--text-muted);
}

.banner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 2.5rem;
  padding: 0.85rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: border-color 0.15s ease;
  max-width: fit-content;
}

.banner:hover { border-color: var(--text-muted); }

.banner strong { color: var(--text); }

.banner-dot {
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--accent);
  flex: none;
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.banner-tag {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent);
  white-space: nowrap;
}

.btn {
  display: inline-block;
  padding: 0.55rem 1.1rem;
  border-radius: 6px;
  font-size: 0.92rem;
  font-weight: 500;
}

.btn-primary {
  background: var(--text);
  color: var(--bg);
}

.btn-primary:hover { opacity: 0.85; }

/* ---------- Entries ---------- */

.entry {
  margin-bottom: 2.5rem;
}

.entry:last-child { margin-bottom: 0; }

.entry-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  margin-bottom: 0.2rem;
}

.entry-head h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0;
}

.entry-date {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.entry-meta {
  font-size: 0.88rem;
  color: var(--accent);
  margin: 0 0 0.75rem;
}

.entry ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--text-muted);
}

.entry li { margin-bottom: 0.45rem; }
.entry li:last-child { margin-bottom: 0; }

.entry-link {
  display: inline-block;
  margin-top: 0.75rem;
  font-size: 0.86rem;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}

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

.poster-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-top: 1.25rem;
}

.poster {
  margin: 1.25rem 0 0;
  max-width: 260px;
}

.poster-row .poster {
  margin-top: 0;
  flex: 1 1 200px;
}

.poster img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 6px;
  border: 1px solid var(--border);
  transition: border-color 0.15s ease, opacity 0.15s ease;
}

.poster a:hover img {
  border-color: var(--text-muted);
  opacity: 0.92;
}

.poster figcaption {
  margin-top: 0.5rem;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.more-projects {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.more-projects a {
  color: var(--text);
  border-bottom: 1px solid var(--border);
}

.more-projects a:hover { border-color: var(--text); }

.achievements {
  margin: 2rem 0 0;
  padding-left: 1.1rem;
  color: var(--text-muted);
}

.achievements li { margin-bottom: 0.6rem; }
.achievements strong { color: var(--text); }

/* ---------- Skills ---------- */

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.75rem;
}

.skill-group h4 {
  font-size: 0.85rem;
  font-weight: 600;
  margin: 0 0 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent);
}

.skill-group p {
  margin: 0;
  font-size: 0.92rem;
}

/* ---------- Contact ---------- */

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: 1rem;
}

.contact-links a {
  font-family: var(--mono);
  font-size: 0.92rem;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--border);
  transition: border-color 0.15s ease;
}

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

/* ---------- Footer ---------- */

.footer {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 3rem;
  border-top: 1px solid var(--border);
}

.footer p {
  margin: 0;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ---------- Misc ---------- */

.noise { display: none; }

@media (max-width: 640px) {
  .nav { display: none; }
  .topbar { padding: 1rem; }
  .hero { padding: 3rem 0 2.5rem; }
  .section { padding: 3rem 0; }
}