:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #6b6b6b;
  --border: #e5e5e5;
  --card: #fafafa;
  --accent: #2563eb;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f0f0f;
    --fg: #ededed;
    --muted: #9a9a9a;
    --border: #2a2a2a;
    --card: #171717;
    --accent: #6ea8fe;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Nav */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  max-width: 720px;
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
}
.nav-brand { font-weight: 600; color: var(--fg); }
.nav-links { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.nav-links a { color: var(--muted); }

/* Layout */
main { max-width: 720px; margin: 0 auto; padding: 3rem 1.5rem 2rem; }

.hero { margin-bottom: 3.5rem; }
h1 { font-size: 2.25rem; margin: 0 0 0.5rem; }
.tagline { color: var(--muted); margin: 0 0 1rem; }
.hero-links { display: flex; gap: 1.25rem; flex-wrap: wrap; }

h2 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 3rem 0 1rem;
}

section p { margin: 0 0 0.75rem; }
.skills { color: var(--muted); font-size: 0.9rem; }

/* Projects */
.projects { list-style: none; padding: 0; margin: 0; display: grid; gap: 1rem; }
.project {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 10px;
  padding: 1.1rem 1.25rem;
}
.project-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
}
.project h3 { margin: 0 0 0.35rem; font-size: 1.05rem; }
.project p { margin: 0 0 0.75rem; color: var(--muted); }
.project-links { display: flex; gap: 0.9rem; font-size: 0.85rem; }
.tags { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.tag {
  font-size: 0.72rem;
  padding: 0.15rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
}

/* Gate */
.gate-form { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 1rem; }
.gate-form input {
  flex: 1;
  min-width: 200px;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--fg);
  font-size: 1rem;
}
button {
  padding: 0.55rem 1rem;
  border: 1px solid var(--accent);
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 0.95rem;
  cursor: pointer;
}
button:hover { opacity: 0.9; }
.gate-error { color: #dc2626; font-size: 0.9rem; margin-top: 0.5rem; }

/* Tabs */
.tabs {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.tab {
  background: none;
  border: none;
  color: var(--muted);
  padding: 0.5rem 0.25rem;
  font-size: 0.9rem;
  border-bottom: 2px solid transparent;
  border-radius: 0;
}
.tab.is-active { color: var(--fg); border-bottom-color: var(--accent); }
.tab-lock { margin-left: auto; }

/* Entries */
.entry { padding-bottom: 1.5rem; margin-bottom: 1.5rem; border-bottom: 1px solid var(--border); }
.entry:last-child { border-bottom: none; }
.entry-date { color: var(--muted); font-size: 0.8rem; margin: 0 0 0.25rem; }
.entry h3 { margin: 0 0 0.5rem; }

footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
  color: var(--muted);
  font-size: 0.85rem;
}