:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --alt: #f2efe8;
  --text: #1f2328;
  --muted: #5b6370;
  --accent: #1f6f5c;
  --accent-soft: #dcefe9;
  --warn: #b5562b;
  --warn-soft: #fbe9df;
  --border: #e2ddd2;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(0,0,0,.05), 0 4px 16px rgba(0,0,0,.05);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14171a;
    --surface: #1d2226;
    --alt: #191d21;
    --text: #e8eaed;
    --muted: #a3acb6;
    --accent: #5fc3a7;
    --accent-soft: #1f3a33;
    --warn: #f0a074;
    --warn-soft: #3a2a22;
    --border: #2c3338;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

.container { width: min(1100px, 92%); margin: 0 auto; }
.narrow { max-width: 640px; }

a { color: var(--accent); }

h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; }
h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); letter-spacing: -.02em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }
.muted { color: var(--muted); }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 60ch; }
.eyebrow {
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: .8rem;
  color: var(--accent);
  font-weight: 600;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 60px;
}
.brand {
  font-weight: 700;
  text-decoration: none;
  color: var(--text);
}
.brand span { color: var(--accent); margin: 0 .15em; }
.nav-links { display: flex; gap: 1.25rem; }
.nav-links a { text-decoration: none; color: var(--muted); font-size: .95rem; }
.nav-links a:hover { color: var(--text); }
.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: .4rem .75rem;
  color: var(--text);
  cursor: pointer;
}

/* Hero */
.hero { padding: 5rem 0 4rem; }
.hero-actions { display: flex; gap: .75rem; flex-wrap: wrap; margin-top: 1.5rem; }

/* Buttons */
.btn {
  display: inline-block;
  padding: .7rem 1.25rem;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  font-size: 1rem;
  font-family: inherit;
}
.btn.primary { background: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.08); }
.btn.ghost { border-color: var(--border); color: var(--text); background: var(--surface); }
.btn.ghost:hover { border-color: var(--accent); }

/* Sections */
.section { padding: 4rem 0; }
.section.alt { background: var(--alt); }

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

.feature-list, .check-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: .9rem;
}
.feature-list li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
}
.check-list li {
  padding-left: 1.6rem;
  position: relative;
}
.check-list li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}
.card.warn .check-list li::before { content: "!"; color: var(--warn); }

/* Topics */
.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem;
  box-shadow: var(--shadow);
}
.card.warn { background: var(--warn-soft); border-color: transparent; }
.card p { color: var(--muted); }
.tag {
  display: inline-block;
  font-size: .8rem;
  padding: .2rem .6rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}

/* Paths */
.path-list { display: grid; gap: 1rem; margin-top: 1.5rem; }
.path {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem 1.4rem;
}
.path p { margin: 0; color: var(--muted); }
.step {
  flex: 0 0 auto;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
}

/* Form */
.contact-form {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}
.contact-form label {
  display: grid;
  gap: .35rem;
  font-weight: 600;
  font-size: .95rem;
}
.contact-form input,
.contact-form textarea {
  font: inherit;
  padding: .7rem .8rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
}
.contact-form input:focus-visible,
.contact-form textarea:focus-visible,
.btn:focus-visible,
.nav-links a:focus-visible,
.menu-toggle:focus-visible {
  outline: 3px solid var(--accent-soft);
  outline-offset: 2px;
}
.form-status { min-height: 1.5em; color: var(--accent); font-weight: 600; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  color: var(--muted);
  font-size: .9rem;
}

/* Responsive */
@media (max-width: 760px) {
  .two-col { grid-template-columns: 1fr; gap: 1.5rem; }
  .menu-toggle { display: inline-block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: .9rem 4%; border-top: 1px solid var(--border); }
  .site-header .nav { position: relative; }
  .hero { padding: 3.5rem 0 2.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}