/* ============================================================
   AIPolis: A Framework for Federal AI Policy
   Visual identity inherited from the v0.09 print framework:
   deep red accent, warm paper, near-black ink, serif display
   over a quiet sans. Restrained, editorial, governmental.
   ============================================================ */

:root {
  --ink:        #141210;
  --ink-soft:   #3a3530;
  --muted:      #6b635a;
  --muted-2:    #8c847a;
  --accent:     #7a1f1f;
  --accent-2:   #9a3030;
  --paper:      #fbf9f5;
  --paper-tint: #f2f0ea;
  --paper-deep: #ebe7df;
  --line:       rgba(20, 18, 16, 0.12);
  --line-soft:  rgba(20, 18, 16, 0.07);
  --white:      #ffffff;

  --serif: "Playfair Display", Georgia, "Times New Roman", serif;
  --sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;

  --wrap: 1120px;
  --gutter: clamp(1.25rem, 5vw, 4rem);
  --radius: 4px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink-soft);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 { margin: 0; color: var(--ink); font-weight: 600; }
p { margin: 0 0 1.1em; }
a { color: var(--accent); text-decoration: none; }
sup { font-size: 0.62em; }
ul, ol { margin: 0; padding: 0; list-style: none; }

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

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: var(--white);
  padding: 0.75rem 1.25rem; z-index: 100; border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus { left: 0; }

/* ---------- Shared type ---------- */
.eyebrow {
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1.25rem;
}

.section-title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(1.9rem, 3.6vw, 2.9rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.accent-text { color: var(--accent); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--sans); font-size: 0.92rem; font-weight: 500;
  letter-spacing: 0.01em;
  padding: 0.9rem 1.7rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.25s var(--ease), color 0.25s var(--ease),
              border-color 0.25s var(--ease), transform 0.25s var(--ease);
}
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: var(--accent); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink); transform: translateY(-1px); }
.btn-block { width: 100%; padding: 1.05rem; }
.btn:disabled { opacity: 0.55; cursor: default; transform: none; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: transparent;
  transition: background-color 0.3s var(--ease), border-color 0.3s var(--ease),
              backdrop-filter 0.3s var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(251, 249, 245, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom-color: var(--line);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.wordmark { display: inline-flex; align-items: center; gap: 0.6rem; color: var(--ink); }
.wordmark-mark {
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--accent); display: inline-block;
  box-shadow: 0 0 0 4px rgba(122, 31, 31, 0.12);
}
.wordmark-text {
  font-family: var(--sans); font-weight: 500;
  letter-spacing: 0.005em; font-size: 1.12rem;
  color: var(--ink);
}
.wordmark-text .wm-ai { font-weight: 700; color: var(--accent); }
.nav { display: flex; align-items: center; gap: clamp(1.1rem, 3vw, 2.4rem); }
.nav a {
  font-family: var(--sans); font-size: 0.9rem; font-weight: 500;
  color: var(--ink-soft); letter-spacing: 0.01em;
  transition: color 0.2s var(--ease);
}
.nav a:hover { color: var(--accent); }
.nav-cta {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 0.5rem 1.05rem;
}
.nav-cta:hover { border-color: var(--accent); }
@media (max-width: 620px) { .nav a:not(.nav-cta) { display: none; } }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  isolation: isolate;
  display: flex;
  align-items: center;
  min-height: clamp(580px, 92vh, 900px);
  padding: clamp(7rem, 16vh, 10rem) 0 clamp(4.5rem, 11vh, 8rem);
  background: linear-gradient(180deg, var(--paper) 0%, var(--paper-tint) 100%);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; overflow: hidden; }
.hero-bg img {
  width: 100%; height: 100%;
  object-fit: cover; object-position: 72% center;
}
.hero-scrim {
  position: absolute; inset: 0;
  background:
    linear-gradient(90deg,
      var(--paper) 0%,
      rgba(251, 249, 245, 0.94) 30%,
      rgba(251, 249, 245, 0.68) 50%,
      rgba(251, 249, 245, 0.22) 74%,
      rgba(251, 249, 245, 0) 100%),
    linear-gradient(180deg,
      rgba(251, 249, 245, 0.25) 0%,
      rgba(251, 249, 245, 0) 22%,
      rgba(251, 249, 245, 0) 68%,
      var(--paper-tint) 100%);
}
.hero-content { position: relative; z-index: 1; max-width: 980px; }
@media (max-width: 720px) {
  .hero-bg img { object-position: 66% center; }
  .hero-scrim {
    background:
      linear-gradient(180deg,
        rgba(251, 249, 245, 0.82) 0%,
        rgba(251, 249, 245, 0.74) 45%,
        rgba(251, 249, 245, 0.86) 80%,
        var(--paper-tint) 100%);
  }
}
.hero-title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(2.6rem, 6.2vw, 5rem);
  line-height: 1.04;
  letter-spacing: -0.018em;
  color: var(--ink);
  margin: 0 0 1.6rem;
  max-width: 16ch;
}
.hero-lede {
  font-size: clamp(1.05rem, 1.7vw, 1.3rem);
  line-height: 1.6;
  color: var(--ink-soft);
  max-width: 60ch;
  margin-bottom: 2.4rem;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.85rem; margin-bottom: 2.6rem; }
.hero-meta {
  font-size: 0.82rem; letter-spacing: 0.04em; color: var(--muted-2);
  text-transform: uppercase; margin: 0;
}

/* ---------- Sections ---------- */
.section { padding: clamp(4.5rem, 11vh, 8.5rem) 0; }
.grid-2 {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(2rem, 6vw, 5.5rem);
  align-items: start;
}
@media (max-width: 820px) { .grid-2 { grid-template-columns: 1fr; gap: 2rem; } }

.col-label .section-title { margin-top: 0; }
.col-body p { color: var(--ink-soft); }
.col-body p:last-child { margin-bottom: 0; }
.lead-emphasis {
  font-family: var(--serif); font-style: italic;
  font-size: 1.18rem; line-height: 1.55; color: var(--muted);
  border-left: 2px solid var(--accent);
  padding-left: 1.4rem; margin-top: 2rem;
}

.moment { background: var(--paper); }

/* ---------- Pillars ---------- */
.pillars { background: var(--paper-tint); border-top: 1px solid var(--line); }
.pillars-head { max-width: 720px; margin-bottom: clamp(2.5rem, 6vh, 4.5rem); }
.pillars-head .display {
  font-size: clamp(2.1rem, 4.4vw, 3.4rem);
}

.pillar-list { display: flex; flex-direction: column; }
.pillar {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  padding: clamp(2.4rem, 5vh, 3.6rem) 0;
  border-top: 1px solid var(--line);
}
.pillar:last-child { border-bottom: 1px solid var(--line); }
.pillar-num {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(3rem, 5vw, 4.4rem);
  line-height: 0.9;
  color: var(--accent);
  letter-spacing: -0.02em;
}
.pillar-title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(1.4rem, 2.5vw, 1.9rem);
  line-height: 1.2;
  color: var(--ink);
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}
.pillar-problem {
  font-family: var(--serif); font-style: italic;
  font-size: 1.12rem; line-height: 1.55;
  color: var(--muted); max-width: 62ch;
  margin-bottom: 1.6rem;
}
.pillar-points { display: grid; gap: 0.85rem; max-width: 64ch; }
.pillar-points li {
  position: relative; padding-left: 1.5rem;
  font-size: 1rem; line-height: 1.6; color: var(--ink-soft);
}
.pillar-points li::before {
  content: ""; position: absolute; left: 0; top: 0.72em;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent); opacity: 0.7;
}
.pillar-points strong { color: var(--ink); font-weight: 600; }

.pillar-note {
  margin-top: 1.5rem; max-width: 60ch;
  font-size: 0.92rem; line-height: 1.55; color: var(--muted);
  padding: 1rem 1.25rem;
  background: rgba(122, 31, 31, 0.045);
  border-radius: var(--radius);
  border-left: 2px solid rgba(122, 31, 31, 0.4);
}
.pillar-stat {
  margin-top: 1.6rem; max-width: 52ch;
  font-size: 0.98rem; line-height: 1.5; color: var(--ink-soft);
}
.stat-figure {
  display: block; font-family: var(--serif); font-weight: 600;
  font-size: 2.4rem; line-height: 1; color: var(--accent);
  margin-bottom: 0.4rem;
}
@media (max-width: 560px) {
  .pillar { grid-template-columns: 1fr; gap: 0.75rem; }
  .pillar-num { font-size: 2.6rem; }
}

/* ---------- Quote band ---------- */
.quote-band {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(4.5rem, 12vh, 8rem) 0;
  text-align: center;
}
.quote-band blockquote { margin: 0; }
.quote-band blockquote p {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(2rem, 5vw, 3.6rem);
  line-height: 1.15;
  color: var(--paper);
  margin: 0;
}
.quote-attrib {
  margin: 1.6rem auto 0; max-width: 48ch;
  font-size: 1rem; color: rgba(251, 249, 245, 0.62);
}

/* ---------- Get involved ---------- */
.involved { background: var(--paper); }
.involved-intro { margin-top: 1.6rem; color: var(--ink-soft); max-width: 46ch; }
.involved-direct { font-size: 0.95rem; color: var(--muted); }
.involved-direct a { font-weight: 500; border-bottom: 1px solid rgba(122,31,31,0.3); }
.involved-direct a:hover { border-color: var(--accent); }

.contact-form { display: grid; gap: 1.3rem; }
.field { display: grid; gap: 0.45rem; }
.field label {
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--muted);
}
.field input, .field textarea, .field select {
  font-family: var(--sans); font-size: 1rem; color: var(--ink);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  width: 100%;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.field textarea { resize: vertical; min-height: 130px; line-height: 1.6; }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(122, 31, 31, 0.12);
}
.field input.invalid, .field textarea.invalid { border-color: var(--accent-2); }
.select-wrap { position: relative; }
.select-wrap::after {
  content: ""; position: absolute; right: 1rem; top: 50%;
  width: 8px; height: 8px; border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted); transform: translateY(-65%) rotate(45deg);
  pointer-events: none;
}
.field select { appearance: none; -webkit-appearance: none; cursor: pointer; }

.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.form-status { margin: 0.3rem 0 0; font-size: 0.92rem; min-height: 1.2em; }
.form-status.ok { color: #2c6b3f; }
.form-status.err { color: var(--accent-2); }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--paper-deep);
  border-top: 1px solid var(--line);
  padding: clamp(3rem, 7vh, 4.5rem) 0;
}
.footer-inner { display: grid; gap: 1.1rem; }
.footer-brand { display: inline-flex; align-items: center; gap: 0.6rem; color: var(--ink); }
.footer-tagline { color: var(--muted); max-width: 52ch; margin: 0; font-size: 0.98rem; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 1.1rem 1.8rem; }
.footer-nav a { font-size: 0.9rem; color: var(--ink-soft); font-weight: 500; }
.footer-nav a:hover { color: var(--accent); }
.footer-legal { margin: 0; font-size: 0.82rem; color: var(--muted-2); letter-spacing: 0.03em; }

/* ---------- Reveal on scroll ---------- */
.reveal {
  opacity: 0; transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  will-change: opacity, transform;
}
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}