/* PAII Landing Page V1 — single stylesheet, no framework */

:root {
  --navy: #0b1a2b;
  --navy-deep: #081321;
  --slate: #45566b;
  --gray: #8b98a8;
  --gray-on-light: #616a75; /* WCAG AA-safe gray for small text on white/off-white */
  --gray-light: #d7dce2;
  --off-white: #f6f5f1;
  --white: #ffffff;
  --orange: #d9622a;
  --orange-dark: #b84f1f;

  --max-width: 1120px;
  --radius: 10px;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.75rem;
  --space-4: 3rem;
  --space-5: 5rem;

  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

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

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--navy);
  background: var(--off-white);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg, canvas { max-width: 100%; display: block; }

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

h1, h2, h3 {
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 var(--space-2);
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.1rem, 5.5vw, 3.6rem); }
h2 { font-size: clamp(1.7rem, 4vw, 2.6rem); }
h3 { font-size: 1.4rem; }

p { margin: 0 0 var(--space-2); }

.lede {
  font-size: 1.15rem;
  color: var(--slate);
  max-width: 42em;
}

.kicker {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--orange-dark);
  margin-bottom: var(--space-1);
}

.fine { font-size: 0.9rem; color: var(--gray); max-width: 42em; }

a { color: inherit; }

/* Skip link */
.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  background: var(--orange);
  color: var(--white);
  padding: 0.75rem 1.25rem;
  z-index: 1000;
  border-radius: 0 0 6px 0;
}
.skip-link:focus {
  left: 0;
  top: 0;
}

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--navy);
  color: var(--off-white);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  row-gap: 0.4rem;
  padding-top: var(--space-2);
  padding-bottom: var(--space-2);
}
.brand {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  text-decoration: none;
}
.brand-mark {
  font-weight: 800;
  letter-spacing: 0.06em;
  font-size: 3.4rem;
}
.brand-full {
  font-weight: 600;
  font-size: 1.9rem;
  font-variant: small-caps;
  letter-spacing: 0.04em;
  color: var(--gray-light);
  margin-top: 0.15rem;
}
.site-header nav {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.site-header nav a {
  text-decoration: none;
  font-size: 0.95rem;
  color: var(--gray-light);
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
}
.site-header nav a:hover,
.site-header nav a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--orange);
}

/* Buttons */
.cta-row {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-top: var(--space-3);
}
.btn {
  display: inline-block;
  text-decoration: none;
  font-weight: 700;
  padding: 0.85rem 1.5rem;
  border-radius: 999px;
  font-size: 1rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn-primary {
  /* orange-dark, not orange: white text on the brighter orange fails WCAG AA (3.66:1) */
  background: var(--orange-dark);
  color: var(--white);
}
.btn-primary:hover, .btn-primary:focus-visible {
  background: #9c4419;
  transform: translateY(-1px);
}
.btn-secondary {
  background: transparent;
  color: inherit;
  border: 2px solid currentColor;
}
.hero .btn-secondary { color: var(--off-white); }
.btn-secondary:hover, .btn-secondary:focus-visible {
  background: rgba(255,255,255,0.08);
}
.invite .btn-secondary { color: var(--off-white); }

/* Sections generic */
section { padding: var(--space-5) 0; }

/* HERO */
.hero {
  background: radial-gradient(circle at 20% 20%, #13253c 0%, var(--navy) 55%, var(--navy-deep) 100%);
  color: var(--off-white);
  padding-top: var(--space-5);
  padding-bottom: var(--space-5);
}
.hero-inner { max-width: 760px; }
.choice-ticker {
  position: relative;
  height: 1.4em;
  font-size: 0.95rem;
  color: var(--gray-light);
  margin-bottom: var(--space-2);
  overflow: hidden;
}
.choice-ticker span {
  position: absolute;
  left: 0;
  top: 0;
  opacity: 0;
  transition: opacity 0.6s ease;
}
.choice-ticker span.is-active { opacity: 1; }
.hero h1 { color: var(--white); }

/* FIRST SCROLL */
.first-scroll {
  background: var(--white);
  text-align: left;
}
.first-scroll .wrap { max-width: 780px; }

/* ATTENTION PROBLEM */
.attention-problem { background: var(--off-white); }
.attention-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  align-items: center;
}
@media (min-width: 860px) {
  .attention-inner { grid-template-columns: 1fr 1fr; }
}
.attention-copy .emphasis {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--navy);
}
.dot-field-wrap {
  position: relative;
  background: var(--white);
  border: 1px solid var(--gray-light);
  border-radius: var(--radius);
  padding: var(--space-2);
}
#dotField {
  width: 100%;
  height: 320px;
  display: block;
}
.dot-caption {
  text-align: center;
  font-size: 0.85rem;
  color: var(--gray-on-light);
  margin: var(--space-1) 0 0;
}

/* BUILD */
.build { background: var(--white); }
.tool-card {
  border: 1px solid var(--gray-light);
  border-radius: var(--radius);
  padding: var(--space-4);
  margin-top: var(--space-4);
}
.tool-head {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.tool-head h3 { margin: 0; }
.badge {
  background: var(--off-white);
  border: 1px solid var(--orange);
  color: var(--orange-dark);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
}
.tool-tagline {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--navy);
  margin-top: var(--space-2);
}
.tool-list {
  margin: var(--space-2) 0;
  padding-left: 1.2rem;
}
.tool-list li { margin-bottom: 0.4rem; }

.loop {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  background: var(--off-white);
  border-radius: var(--radius);
  padding: var(--space-2) var(--space-3);
  margin: var(--space-3) 0;
  font-weight: 600;
  font-size: 0.95rem;
}
.loop-arrow { color: var(--orange); font-weight: 700; }

.boundary {
  border-left: 3px solid var(--orange);
  padding-left: var(--space-2);
  color: var(--slate);
}

.compare {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-top: var(--space-4);
}
@media (min-width: 700px) {
  .compare { grid-template-columns: 1fr 1fr; }
}
.compare-label {
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--gray-on-light);
  font-weight: 700;
}
.compare-q {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--navy);
}
.compare-note {
  text-align: center;
  color: var(--slate);
  font-style: italic;
  margin-top: var(--space-2);
}

/* HUMAN CONTROL */
.human-control {
  background: var(--navy);
  color: var(--off-white);
  text-align: center;
}
.human-control h2 { color: var(--white); }
.human-control .lede { color: var(--gray-light); margin: 0 auto var(--space-2); }
.human-control .fine { color: var(--gray); margin: 0 auto; }

/* NOT SECTION */
.not-section { background: var(--off-white); }
.not-list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-3);
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem;
}
@media (min-width: 640px) {
  .not-list { grid-template-columns: 1fr 1fr; }
}
.not-list li {
  font-weight: 700;
  font-size: 1.1rem;
  padding: 0.75rem 1rem;
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid var(--gray-light);
}

/* AUDIENCE */
.audience { background: var(--white); }
.vignette-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  margin-top: var(--space-3);
}
@media (min-width: 640px) {
  .vignette-grid { grid-template-columns: 1fr 1fr; }
}
.vignette {
  background: var(--off-white);
  border-radius: var(--radius);
  padding: var(--space-3);
  border-top: 3px solid var(--orange);
}
.vignette-role {
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--orange-dark);
}

/* FOUNDER */
.founder { background: var(--off-white); }
.founder-inner {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-3);
  align-items: start;
}
.tree-mark { color: var(--orange); margin-top: 0.3rem; }
.founder-title { color: var(--slate); font-weight: 600; margin-top: -0.5rem; }
.founder-links a {
  text-decoration: underline;
  text-decoration-color: var(--orange);
  color: var(--navy);
}

/* INVITE */
.invite {
  background: var(--navy);
  color: var(--off-white);
  text-align: center;
}
.invite h2 { color: var(--white); }
.invite .lede { color: var(--gray-light); margin: 0 auto; }
.invite .cta-row { justify-content: center; }

/* FOOTER */
.site-footer {
  background: var(--navy-deep);
  color: var(--gray);
  font-size: 0.85rem;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
}

/* Center text on narrow + inverse sections */
.human-control .wrap,
.invite .wrap {
  max-width: 700px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}

/* CONTACT MODAL (UI only, not yet wired to a live backend) */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(8, 19, 33, 0.6);
  z-index: 200;
}
.modal {
  position: fixed;
  inset: 0;
  z-index: 201;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3);
}
.modal[hidden],
.modal-backdrop[hidden] { display: none; }
.modal-card {
  position: relative;
  background: var(--white);
  color: var(--navy);
  border-radius: var(--radius);
  padding: var(--space-4);
  max-width: 440px;
  width: 100%;
  max-height: calc(100vh - var(--space-4));
  overflow-y: auto;
}
.modal-close {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  background: none;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--gray-on-light);
  cursor: pointer;
  padding: 0.25rem 0.5rem;
}
.modal-close:hover,
.modal-close:focus-visible { color: var(--navy); }
.field { margin-bottom: var(--space-2); }
.field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--slate);
  margin-bottom: 0.3rem;
}
.field input,
.field textarea {
  width: 100%;
  font-family: inherit;
  font-size: 1rem;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--gray-light);
  border-radius: 6px;
  color: var(--navy);
  background: var(--off-white);
}
.field textarea { resize: vertical; }
.checkbox-field {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--slate);
  margin-bottom: var(--space-3);
}
.checkbox-field input { width: auto; }
.modal-actions { display: flex; justify-content: flex-end; }
.modal-status {
  margin: var(--space-2) 0 0;
  font-size: 0.9rem;
  color: var(--slate);
  min-height: 1.3em;
}
.modal-status.is-success { color: var(--orange-dark); font-weight: 600; }
.modal-status.is-error { color: var(--navy); font-weight: 700; }

/* Small screens */
@media (max-width: 480px) {
  section { padding: var(--space-4) 0; }
  .cta-row { flex-direction: column; align-items: stretch; }
  .btn { text-align: center; }
  .founder-inner { grid-template-columns: 1fr; }
  .tree-mark { display: none; }
  .header-inner { flex-direction: column; align-items: flex-start; }
  .site-header nav { width: 100%; gap: 0.9rem; }
  .site-header nav a { font-size: 0.85rem; }
  .loop { font-size: 0.85rem; padding: var(--space-2); }
}