/* ketaminefordepressionguide.com — soft blue + warm gray (hopeful medical theme) */
:root {
  --bg: #fdfcfb;
  --bg-alt: #f0f3f7;
  --ink: #1c2028;
  --ink-soft: #4f5564;
  --accent: #3571b8;
  --accent-dark: #265694;
  --accent-soft: #e4edf7;
  --border: #d2d8e1;
  --max: 1000px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }

/* ---- header / nav ---- */
.site-header { background: #fff; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; }
.nav { max-width: var(--max); margin: 0 auto; padding: .85rem 1.25rem; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: .5rem; }
.brand { font-weight: 700; font-size: 1.05rem; color: var(--accent); text-decoration: none; }
.brand span { color: var(--ink-soft); }
.nav ul { list-style: none; display: flex; gap: 1.25rem; flex-wrap: wrap; }
.nav ul a { text-decoration: none; color: var(--ink-soft); font-size: .92rem; font-weight: 500; transition: color .15s; }
.nav ul a:hover { color: var(--accent); }

/* ---- hero ---- */
.hero { background: linear-gradient(135deg, var(--accent-soft) 0%, #fff 100%); padding: 3rem 1.25rem 2.5rem; text-align: center; border-bottom: 1px solid var(--border); }
.hero h1 { font-size: 2rem; line-height: 1.25; max-width: 720px; margin: 0 auto .75rem; color: var(--ink); }
.hero .subtitle { font-size: 1.1rem; color: var(--ink-soft); max-width: 600px; margin: 0 auto; }

/* ---- content ---- */
main { max-width: var(--max); margin: 0 auto; padding: 2.5rem 1.25rem 3rem; }
h2 { font-size: 1.45rem; margin: 2.25rem 0 .75rem; color: var(--ink); line-height: 1.3; }
h3 { font-size: 1.15rem; margin: 1.75rem 0 .5rem; color: var(--ink); }
p { margin-bottom: 1rem; color: var(--ink-soft); }
ul, ol { margin: 0 0 1rem 1.5rem; color: var(--ink-soft); }
li { margin-bottom: .35rem; }
a { color: var(--accent); }
a:hover { color: var(--accent-dark); }
strong { color: var(--ink); }

/* ---- section box ---- */
.section-box { background: var(--bg-alt); border: 1px solid var(--border); border-radius: 8px; padding: 1.5rem; margin: 1.5rem 0; }

/* ---- evidence box (research citations) ---- */
.evidence-box { background: #f7f9fc; border-left: 4px solid var(--accent); border-radius: 0 8px 8px 0; padding: 1.25rem 1.5rem; margin: 1.5rem 0; }
.evidence-box .label { font-size: .78rem; text-transform: uppercase; letter-spacing: .06em; color: var(--accent); font-weight: 700; margin-bottom: .5rem; }
.evidence-box p { font-size: .93rem; margin-bottom: .5rem; }

/* ---- mechanism step ---- */
.mechanism-step { display: flex; gap: 1rem; align-items: flex-start; background: var(--bg-alt); border: 1px solid var(--border); border-radius: 8px; padding: 1.25rem; margin: 1rem 0; }
.mechanism-step .step-num { flex-shrink: 0; width: 38px; height: 38px; background: var(--accent); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: .95rem; }
.mechanism-step .step-body h3 { margin-top: 0; }
.mechanism-step .step-body p { font-size: .93rem; }

/* ---- provider card ---- */
.provider-card { border: 1px solid var(--border); border-radius: 8px; padding: 1.5rem; margin: 1.25rem 0; background: #fff; }
.provider-card.featured { border-color: var(--accent); box-shadow: 0 2px 12px rgba(53,113,184,.12); }
.provider-card .badge { display: inline-block; background: var(--accent); color: #fff; font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; padding: .2rem .6rem; border-radius: 4px; margin-bottom: .6rem; }
.provider-card h3 { margin-top: 0; }
.provider-card ul { font-size: .93rem; }

/* ---- comparison table ---- */
.compare-table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; font-size: .93rem; }
.compare-table th, .compare-table td { padding: .7rem .9rem; text-align: left; border-bottom: 1px solid var(--border); }
.compare-table th { background: var(--bg-alt); font-weight: 600; color: var(--ink); }
.compare-table td { color: var(--ink-soft); }

/* ---- CTA ---- */
.cta-box { background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%); color: #fff; border-radius: 10px; padding: 2rem; margin: 2rem 0; text-align: center; }
.cta-box h3 { color: #fff; margin-top: 0; font-size: 1.25rem; }
.cta-box p { color: rgba(255,255,255,.88); }
.cta-box .btn { display: inline-block; background: #fff; color: var(--accent-dark); font-weight: 700; padding: .7rem 1.75rem; border-radius: 6px; text-decoration: none; margin-top: .75rem; transition: opacity .15s; }
.cta-box .btn:hover { opacity: .9; }

/* ---- disclaimer ---- */
.disclaimer { margin-top: 2.5rem; padding: 1.25rem; background: #fef9f0; border: 1px solid #e8dcc8; border-radius: 8px; font-size: .82rem; color: #6b5e4b; line-height: 1.55; }

/* ---- footer ---- */
.site-footer { background: var(--bg-alt); border-top: 1px solid var(--border); padding: 1.75rem 1.25rem; margin-top: 2rem; font-size: .85rem; color: var(--ink-soft); }
.site-footer .wrap { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: .75rem; }
.site-footer a { color: var(--ink-soft); text-decoration: none; margin-left: 1rem; }
.site-footer a:hover { color: var(--accent); }

/* ---- cross-links ---- */
.cross-links { margin: 2rem 0; padding: 1.25rem; background: var(--bg-alt); border-radius: 8px; font-size: .88rem; }
.cross-links strong { display: block; margin-bottom: .4rem; font-size: .82rem; text-transform: uppercase; letter-spacing: .04em; color: var(--ink-soft); }
.cross-links a { margin-right: 1.25rem; }

/* ---- responsive ---- */
@media (max-width: 640px) {
  .hero h1 { font-size: 1.5rem; }
  .nav { flex-direction: column; align-items: flex-start; }
  .compare-table { font-size: .82rem; }
  .compare-table th, .compare-table td { padding: .5rem; }
  .site-footer .wrap { flex-direction: column; text-align: center; }
  .mechanism-step { flex-direction: column; }
}