/* ==========================================================================
   BehaviorIRL — Design System (lightweight, single-page site)
   Palette: deep teal-charcoal ink, warm paper, sage + rust accents
   Type: Newsreader (serif, headlines) + IBM Plex Sans (body/UI)
   ========================================================================== */

:root {
  --ink: #17262A;
  --ink-soft: #33474C;
  --paper: #F6F4EF;
  --paper-dim: #EFEBE1;
  --card: #FFFFFF;
  --sage: #3D6B63;
  --sage-light: #E7EFE9;
  --sage-dark: #274B44;
  --rust: #BC5B2E;
  --rust-dark: #9A481F;
  --line: #DCD5C4;
  --line-dark: #2A3B3F;
  --muted: #5C6B6C;

  --font-head: "Newsreader", Georgia, "Times New Roman", serif;
  --font-body: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --max: 1180px;
  --max-narrow: 760px;
  --radius: 6px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 0.5em;
  color: var(--ink);
}
h1 { font-size: clamp(2.2rem, 4.5vw, 3.4rem); font-weight: 500; letter-spacing: -0.01em; }
h2 { font-size: clamp(1.7rem, 3vw, 2.3rem); font-weight: 500; }
h3 { font-size: 1.2rem; margin-top: 1.3em; }
p { margin: 0 0 1.1em; }
a { color: var(--sage-dark); text-decoration-thickness: 1px; }
a:hover { color: var(--rust); }
img { max-width: 100%; display: block; }

:focus-visible { outline: 3px solid var(--rust); outline-offset: 2px; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.container { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--ink); color: #fff;
  padding: 12px 18px; z-index: 100; border-radius: 0 0 6px 0;
}
.skip-link:focus { left: 0; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(246,244,239,0.94);
  backdrop-filter: saturate(140%) blur(6px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  max-width: var(--max); margin: 0 auto; padding: 14px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.logo { font-family: var(--font-head); font-size: 1.4rem; font-weight: 600; color: var(--ink); text-decoration: none; white-space: nowrap; }
.logo span { color: var(--rust); }

.main-nav { display: flex; align-items: center; gap: 28px; }
.main-nav a { color: var(--ink-soft); text-decoration: none; font-size: 0.98rem; }
.main-nav a:hover { color: var(--sage-dark); }
.nav-links { display: flex; gap: 26px; }
.nav-cta-group { display: flex; align-items: center; gap: 18px; }

.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 500; font-size: 0.98rem;
  padding: 12px 22px; border-radius: var(--radius);
  text-decoration: none; border: 1px solid transparent; cursor: pointer;
  transition: transform 0.12s ease, background 0.12s ease, border-color .12s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--rust); color: #fff; }
.btn-primary:hover { background: var(--rust-dark); color: #fff; }
.btn-secondary { background: transparent; border-color: var(--ink); color: var(--ink); }
.btn-secondary:hover { border-color: var(--sage-dark); color: var(--sage-dark); }
.btn-small { padding: 9px 16px; font-size: 0.9rem; }
.btn-block { display: block; width: 100%; text-align: center; }

.nav-toggle {
  display: none; background: none; border: 1px solid var(--line);
  border-radius: 6px; padding: 8px 10px; cursor: pointer;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  display: block; width: 20px; height: 2px; background: var(--ink); position: relative; transition: 0.2s;
}
.nav-toggle span::before { content: ""; position: absolute; top: -6px; }
.nav-toggle span::after { content: ""; position: absolute; top: 6px; }

/* ---------- Hero ---------- */
.hero { padding: 64px 0 56px; border-bottom: 1px solid var(--line); }
.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
.eyebrow-plain { color: var(--sage-dark); font-size: 0.95rem; margin-bottom: 14px; }
.hero p.lede { font-size: 1.2rem; color: var(--ink-soft); max-width: 46ch; }
.hero-cta-row { display: flex; gap: 16px; align-items: center; margin-top: 26px; flex-wrap: wrap; }

/* photo placeholder — swap for a real licensed photo, see README */
.photo {
  position: relative; border-radius: 10px; overflow: hidden;
  background: linear-gradient(135deg, var(--sage-light), var(--paper-dim));
  display: flex; align-items: flex-end; min-height: 220px;
}
.photo img { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; }
.photo-label {
  position: relative; z-index: 2; font-size: 0.78rem; color: var(--muted);
  background: rgba(255,255,255,0.85); padding: 6px 10px; margin: 10px; border-radius: 4px;
}

/* ---------- Sections ---------- */
section { padding: 64px 0; }
.section-tight { padding: 48px 0; }
.section-alt { background: var(--paper-dim); }
.prose { max-width: var(--max-narrow); margin: 0 auto; }

/* ---------- Grid ---------- */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

/* ---------- Email capture ---------- */
.capture {
  background: var(--sage-dark); color: #fff; border-radius: 12px; padding: 44px;
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 36px; align-items: center;
}
.capture h2 { color: #fff; }
.capture p { color: #DCEAE3; }
.capture-form { display: grid; gap: 12px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.field {
  padding: 13px 14px; border-radius: 6px; border: 1px solid transparent;
  font-family: var(--font-body); font-size: 1rem; width: 100%;
}
.consent { font-size: 0.82rem; color: #C9DCD3; margin-top: 4px; }
.form-status { font-size: 0.9rem; margin-top: 8px; min-height: 1.2em; }

/* ---------- Final CTA banner ---------- */
.cta-banner {
  text-align: center; padding: 72px 0;
  background: linear-gradient(180deg, var(--paper) 0%, var(--sage-light) 100%);
}
.cta-banner h2 { max-width: 24ch; margin: 0 auto 18px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink); color: #C7D0CE; padding: 48px 0 26px; font-size: 0.94rem; }
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px;
  padding-bottom: 28px; border-bottom: 1px solid var(--line-dark);
}
.footer-grid h4 { color: #fff; font-family: var(--font-body); font-size: 0.9rem; margin: 0 0 14px; font-weight: 600; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.footer-grid a { color: #C7D0CE; text-decoration: none; }
.footer-grid a:hover { color: #fff; }
.footer-brand p { color: #A9B4B1; max-width: 34ch; }
.footer-bottom { padding-top: 22px; color: #8FA09D; font-size: 0.85rem; }
.disclaimer-note { font-size: 0.82rem; color: #8FA09D; max-width: 900px; margin-top: 16px; line-height: 1.55; }

/* ---------- Interior pages (legal) ---------- */
.page-hero { padding: 40px 0 44px; border-bottom: 1px solid var(--line); }
.article-meta { color: var(--muted); font-size: 0.9rem; margin-bottom: 24px; }
.owner-placeholder {
  background: #FBF3E7; border: 1px dashed #C99A3D; border-radius: 8px;
  padding: 16px 20px; font-size: 0.92rem; color: #6B4E1F; margin: 20px 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 920px) {
  .hero-grid { grid-template-columns: 1fr; }
  .photo { order: -1; aspect-ratio: 16/9; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .capture { grid-template-columns: 1fr; padding: 30px; }
}
@media (max-width: 720px) {
  .nav-toggle { display: inline-flex; flex-direction: column; justify-content: center; }
  .header-inner { flex-wrap: wrap; }
  .main-nav { display: none; }
  .main-nav.open {
    display: flex; flex-direction: column; align-items: flex-start; width: 100%; gap: 16px; padding-top: 16px;
  }
  .main-nav.open .nav-links { flex-direction: column; gap: 14px; }
  .main-nav.open .nav-cta-group { flex-direction: column; align-items: flex-start; width: 100%; }
  .grid-2 { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  section { padding: 44px 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn:hover { transform: none; }
}