:root {
  --ink: #0A0E1A;
  --ink-2: #1A1F2E;
  --paper: #FAFAF7;
  --paper-2: #F2F2EE;
  --signal: #2E6BFF;
  --signal-2: #1E50CC;
  --caution: #E8A33D;
  --halt: #D7423F;
  --mute: #8A8F99;
  --mute-2: #C7C9CE;
  --rule: #E5E5E0;
  --rule-dark: #2A2F3D;
}
* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Inter", -apple-system, "PingFang SC", sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 32px; }

/* NAV */
nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250,250,247,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--rule);
}
nav .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand { font-weight: 700; font-size: 18px; letter-spacing: -0.01em; }
.brand-dot { color: var(--signal); }
.nav-links { display: flex; gap: 28px; font-size: 14px; align-items: center; }
.nav-links > a:hover, .nav-trigger:hover { color: var(--signal); }
.nav-links a.active { color: var(--signal); font-weight: 500; }
.nav-cta {
  background: var(--ink); color: var(--paper);
  padding: 9px 18px; border-radius: 999px;
  font-size: 14px; font-weight: 600;
  transition: background 0.15s, transform 0.1s;
}
.nav-cta:hover { background: var(--ink-2); }
.nav-cta:active { transform: scale(0.97); }

/* Login link in nav */
.nav-login {
  color: var(--mute);
  font-size: 14px;
  transition: color 0.15s;
}
.nav-login:hover { color: var(--ink); }

/* Theme toggle */
.theme-toggle {
  background: transparent;
  border: 0;
  width: 32px; height: 32px;
  border-radius: 50%;
  cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--mute);
  transition: color 0.15s, background 0.15s;
  padding: 0;
}
.theme-toggle:hover {
  color: var(--ink);
  background: var(--paper-2);
}
.theme-toggle .icon-moon { display: inline-block; }
.theme-toggle .icon-sun { display: none; }
html.dark .theme-toggle .icon-moon { display: none; }
html.dark .theme-toggle .icon-sun { display: inline-block; }

/* Dark mode palette */
html.dark {
  --ink: #F5F5F0;
  --ink-2: #2A2F3D;
  --paper: #0A0E1A;
  --paper-2: #14192A;
  --rule: #2A2F3D;
  --rule-dark: #3A3F4D;
  --mute: #8A8F99;
  --mute-2: #5A5F69;
}
html.dark body { background: var(--paper); color: var(--ink); }
html.dark .card,
html.dark .what-card,
html.dark .anti-card,
html.dark .role-card,
html.dark .pet-card,
html.dark .lead-form,
html.dark .mock,
html.dark .anatomy-wrap,
html.dark .compare-table,
html.dark .case-table,
html.dark .post-card,
html.dark .visa-card,
html.dark .reason-card,
html.dark .situation-card,
html.dark .tier-card { background: var(--ink-2); }
html.dark .field input,
html.dark .field select,
html.dark .field textarea { background: var(--paper-2); color: var(--ink); }
html.dark nav { background: rgba(10,14,26,0.85); }
html.dark .chip { background: var(--ink-2); border-color: var(--rule); color: var(--mute-2); }
html.dark .chip.active { background: var(--ink); color: var(--paper); }

/* Resources dropdown */
.nav-dropdown { position: relative; }
.nav-trigger {
  background: transparent; border: 0;
  font: inherit; font-size: 14px; color: var(--ink);
  cursor: pointer;
  display: inline-flex; align-items: center; gap: 4px;
  padding: 0;
}
.nav-trigger svg { transition: transform 0.2s; }
.nav-dropdown.open .nav-trigger svg { transform: rotate(180deg); }
.dropdown-menu {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--rule-dark);
  border-radius: 14px;
  padding: 12px;
  min-width: 240px;
  box-shadow: 0 12px 40px rgba(10,14,26,0.2);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s, transform 0.18s;
}
.nav-dropdown.open .dropdown-menu {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.dropdown-menu a {
  display: block;
  padding: 12px 16px;
  font-family: "JetBrains Mono", monospace;
  font-size: 14px;
  color: var(--paper);
  border-radius: 8px;
  transition: background 0.12s, color 0.12s;
}
.dropdown-menu a:hover {
  background: var(--ink-2);
  color: var(--signal);
}

/* HERO */
.hero { padding: 80px 0 56px; }
.hero.centered { text-align: center; }
.eyebrow {
  font-size: 12px; font-weight: 600;
  color: var(--signal);
  letter-spacing: 0.12em; text-transform: uppercase;
  margin-bottom: 16px;
}
.hero h1 {
  font-size: 56px;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin: 0 0 20px;
}
.hero h1 em { font-style: normal; color: var(--signal); }
.hero p.lead {
  font-size: 18px; color: var(--mute);
  margin: 0 0 28px;
  max-width: 620px;
}
.hero.centered p.lead { margin-left: auto; margin-right: auto; }

/* Section */
.section { padding: 80px 0; }
.section.alt { background: var(--paper-2); }
.section.dark { background: var(--ink); color: var(--paper); }
.section-head { text-align: center; margin-bottom: 48px; }
.section-head h2 {
  font-size: 36px; font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
  line-height: 1.15;
  max-width: 760px; margin-left: auto; margin-right: auto;
}
.section-head p {
  font-size: 17px; color: var(--mute);
  max-width: 600px; margin: 0 auto;
}
.section.dark .section-head h2 { color: var(--paper); }
.section.dark .section-head p { color: var(--mute-2); }

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 10px;
  font-weight: 600; font-size: 14px;
  transition: all 0.15s;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
}
.btn-primary { background: var(--signal); color: white; }
.btn-primary:hover { background: var(--signal-2); }
.btn-secondary {
  background: transparent; color: var(--ink);
  border-color: var(--ink);
}
.btn-secondary:hover { background: var(--ink); color: var(--paper); }

/* Card grids */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

.card {
  background: #FFFFFF;
  border: 1px solid var(--rule);
  border-radius: 16px;
  padding: 28px;
  transition: border-color 0.15s, transform 0.15s;
}
.card.hover:hover {
  border-color: var(--signal);
  transform: translateY(-2px);
}
.card h3 {
  font-size: 18px; font-weight: 600;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}
.card p { font-size: 14px; color: var(--mute); margin: 0; line-height: 1.55; }

/* CTA band */
.cta-band {
  background: var(--ink);
  color: var(--paper);
  border-radius: 24px;
  padding: 64px 48px;
  text-align: center;
  margin-bottom: 96px;
}
.cta-band h2 {
  font-size: 36px; font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  line-height: 1.1;
}
.cta-band p {
  color: var(--mute-2);
  font-size: 17px;
  max-width: 540px; margin: 0 auto 28px;
}
.cta-buttons { display: inline-flex; gap: 12px; }
.cta-band .btn-secondary {
  color: var(--paper);
  border-color: var(--rule-dark);
}
.cta-band .btn-secondary:hover {
  background: var(--ink-2);
  color: var(--paper);
}

/* Footer */
footer {
  border-top: 1px solid var(--rule);
  padding: 48px 0 64px;
  color: var(--mute);
  font-size: 13px;
}
footer .container {
  display: flex; justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap; gap: 32px;
}
.footer-links { display: flex; gap: 32px; }
.disclaimer {
  border-top: 1px dashed var(--rule);
  margin-top: 32px; padding-top: 24px;
  font-size: 12px;
  line-height: 1.55;
  max-width: 760px;
}

/* Pill / tag */
.pill {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: var(--paper-2);
  color: var(--mute);
}
.pill.signal { background: rgba(46,107,255,0.1); color: var(--signal); }
.pill.caution { background: rgba(232,163,61,0.15); color: var(--caution); }

/* Form */
.field { display: flex; flex-direction: column; margin-bottom: 12px; }
.field label {
  font-size: 12px; font-weight: 600;
  color: var(--mute); letter-spacing: 0.04em;
  margin-bottom: 4px;
}
.field input, .field select, .field textarea {
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 10px 12px;
  font: inherit;
  font-size: 14px;
  color: var(--ink);
  transition: border-color 0.15s, background 0.15s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--signal);
  background: #FFFFFF;
}

/* Responsive */
@media (max-width: 880px) {
  .hero h1 { font-size: 40px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .cta-band { padding: 48px 24px; }
  .section { padding: 56px 0; }
}