*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --red:     #d63027;
  --red-dim: #7f1d1d;
  --cream:   #f0ebe3;
  --bg:      #191919;
  --surface: #222222;
  --border:  #303030;
  --muted:   #999;
  --text:    #e8e2da;
  --code-bg:       #2a1210;
  --code-border:   #5a1f1c;
  --badge-bg:      #2a1210;
  --badge-border:  #5a1f1c;
  --chat-bg:       #111111;
  --chat-header-bg:#0e0e0e;
  --chat-bubble-user: #3a1a18;
  --chat-bubble-bot:  #2a2a2a;
  --chat-label-user:  #8a4a44;
  --chat-label-bot:   #5a7a6a;
  --chat-fade:     #111111;
  --nav-cta-bg:    #333333;
  --disabled-btn-bg: #333333;
}
body.light-mode {
  --bg:      #f7f4f0;
  --surface: #ffffff;
  --border:  #e0dbd3;
  --muted:   #888;
  --text:    #1a1a1a;
  --cream:   #1a1a1a;
  --code-bg:       #fff0ee;
  --code-border:   #f5b0ac;
  --badge-bg:      #fff0ee;
  --badge-border:  #f5b0ac;
  --chat-bg:       #ebebeb;
  --chat-header-bg:#e0e0e0;
  --chat-bubble-user: #ffdede;
  --chat-bubble-bot:  #ffffff;
  --chat-label-user:  #c03a32;
  --chat-label-bot:   #2a6a50;
  --chat-fade:     #ebebeb;
  --nav-cta-bg:    #e5e0da;
  --disabled-btn-bg: #e5e0da;
}
body {
  font-family: 'Outfit', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  transition: background 0.2s, color 0.2s;
}
a { color: inherit; text-decoration: none; }

/* ── Nav ── */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 2rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px);
  z-index: 10;
}
.nav-left { display: flex; align-items: center; gap: 2rem; }
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}
.wordmark {
  font-family: 'Outfit', sans-serif;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  line-height: 1;
}
.wordmark .open { font-weight: 300; color: var(--muted); }
.wordmark .pm   { font-weight: 700; color: var(--cream); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.nav-links a {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--muted);
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--cream); background: rgba(255,255,255,0.05); }
.nav-links a.active { color: var(--cream); }
.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.3rem 0.5rem;
  cursor: pointer;
  font-size: 0.9rem;
  line-height: 1;
  color: var(--muted);
  transition: border-color 0.15s, color 0.15s;
}
.theme-toggle:hover { border-color: var(--muted); }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--cream);
  border-radius: 2px;
  transition: opacity 0.2s;
}
.mobile-menu {
  display: none;
  flex-direction: column;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 1.5rem 1rem;
  gap: 0.25rem;
}
.mobile-menu a {
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--muted);
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
}
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu a:hover { color: var(--cream); }
@media (max-width: 640px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
}

/* ── Eyebrow ── */
.eyebrow {
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 1.25rem;
}

/* ── Footer ── */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem;
  text-align: center;
  color: var(--muted);
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
footer span { color: var(--red); }
footer .footer-links {
  margin-top: 0.75rem;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}
footer .footer-links a {
  color: var(--muted);
  text-decoration: underline;
  text-underline-offset: 3px;
}
footer .footer-links a:hover { color: var(--text); }
footer .footer-theme {
  margin-top: 1.25rem;
  display: flex;
  justify-content: center;
}
footer .footer-theme .theme-toggle {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
footer .footer-theme .theme-label { color: var(--muted); }