/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --blue:     #185FA5;
  --blue-lt:  #EBF4FF;
  --blue-dk:  #0C447C;
  --green:    #1D9E75;
  --green-lt: #F0FBF6;
  --orange:   #E05C2A;
  --orange-lt:#FFF5F0;
  --purple:   #7B1FA2;
  --purple-lt:#F4F0FF;
  --teal:     #0891B2;
  --teal-lt:  #EAF7FF;
  --red:      #C0392B;
  --gray-50:  #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-400: #94a3b8;
  --gray-600: #475569;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --font:     'Inter', system-ui, sans-serif;
  --serif:    'Merriweather', Georgia, serif;
  --radius:   12px;
  --radius-lg:20px;
  --shadow:   0 4px 24px rgba(0,0,0,.08);
  --shadow-lg:0 12px 48px rgba(0,0,0,.12);
  --transition: 0.25s ease;
}

html { scroll-behavior: smooth; }
body  { font-family: var(--font); color: var(--gray-800); background: #fff; line-height: 1.7; -webkit-font-smoothing: antialiased; }

a  { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container { max-width: 1180px; margin: 0 auto; padding: 0 1.5rem; }
.section    { padding: 5rem 0; }

/* ===== BUTTONS ===== */
.btn {
  display: inline-block;
  padding: .75rem 1.75rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: .95rem;
  transition: var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
}
.btn-primary  { background: var(--blue); color: #fff; }
.btn-primary:hover  { background: var(--blue-dk); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(24,95,165,.3); }
.btn-outline  { background: transparent; color: var(--blue); border-color: var(--blue); }
.btn-outline:hover  { background: var(--blue); color: #fff; }
.btn-white    { background: #fff; color: var(--blue); font-weight: 700; }
.btn-white:hover    { background: var(--blue-lt); transform: translateY(-2px); }
.btn-outline-white  { background: transparent; color: #fff; border-color: rgba(255,255,255,.6); }
.btn-outline-white:hover { background: rgba(255,255,255,.15); }

/* ===== SECTION HEADERS ===== */
.section-tag {
  display: inline-block;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--blue);
  background: var(--blue-lt);
  padding: .3rem .9rem;
  border-radius: 50px;
  margin-bottom: 1rem;
}
.section-header { text-align: center; margin-bottom: 3.5rem; }
.section-header h2 { font-size: clamp(1.8rem, 3vw, 2.4rem); font-weight: 800; color: var(--gray-900); margin-bottom: .75rem; }
.section-header.light h2 { color: #fff; }
.section-header.light .section-tag { background: rgba(255,255,255,.15); color: #fff; }
.section-lead { font-size: 1.05rem; color: var(--gray-600); max-width: 700px; margin: 0 auto; }
.section-header.light .section-lead { color: rgba(255,255,255,.85); }

/* ===== FADE-IN ANIMATION ===== */
.fade-in { opacity: 0; transform: translateY(24px); transition: opacity .55s ease, transform .55s ease; }
.fade-in.visible { opacity: 1; transform: none; }

/* ===== NAVBAR ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}
.navbar.scrolled { border-bottom-color: var(--gray-200); box-shadow: 0 2px 20px rgba(0,0,0,.07); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 144px; }
.nav-logo img { height: 128px; width: auto; }
.nav-links { display: flex; align-items: center; gap: 1.1rem; }
.nav-links a { font-size: .9rem; font-weight: 500; color: var(--gray-600); transition: color var(--transition); white-space: nowrap; }
.nav-links a:hover { color: var(--blue); }
.btn-nav {
  background: var(--blue); color: #fff !important;
  padding: .5rem .9rem; border-radius: 50px;
  font-size: .88rem !important;
  transition: background var(--transition), transform var(--transition) !important;
}
.btn-nav:hover { background: var(--blue-dk) !important; transform: translateY(-1px); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; padding: .4rem; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--gray-800); border-radius: 2px; transition: var(--transition); }
.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ===== HERO ===== */
.hero {
  padding: 9rem 0 4rem;
  background: linear-gradient(145deg, #f0f6ff 0%, #f8fcff 50%, #eaf7f2 100%);
  position: relative;
  overflow: hidden;
}
.hero-bg-shapes { position: absolute; inset: 0; pointer-events: none; }
.shape { position: absolute; border-radius: 50%; opacity: .12; }
.shape-1 { width: 500px; height: 500px; background: var(--blue); top: -150px; right: -100px; }
.shape-2 { width: 300px; height: 300px; background: var(--green); bottom: 0; left: 5%; }
.shape-3 { width: 200px; height: 200px; background: var(--orange); top: 40%; left: 40%; }
.hero-inner { display: grid; grid-template-columns: 1fr 420px; gap: 3rem; align-items: center; position: relative; }
.hero-text { max-width: 640px; }
.hero-eyebrow {
  display: inline-block; font-size: .78rem; font-weight: 700; letter-spacing: .14em;
  text-transform: uppercase; color: var(--green); background: rgba(29,158,117,.1);
  padding: .3rem .9rem; border-radius: 50px; margin-bottom: 1.25rem;
}
.hero-text h1 { font-size: clamp(2rem, 4vw, 3rem); font-weight: 800; line-height: 1.2; color: var(--gray-900); margin-bottom: 1.25rem; }
.gradient-text { background: linear-gradient(135deg, var(--blue), var(--green)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-lead { font-size: 1.1rem; color: var(--gray-600); margin-bottom: 2rem; max-width: 580px; }
.hero-stats { display: flex; gap: 2rem; margin-bottom: 2.5rem; }
.stat { display: flex; flex-direction: column; }
.stat-num { font-size: 1.75rem; font-weight: 800; color: var(--blue); line-height: 1.1; }
.stat-label { font-size: .78rem; color: var(--gray-600); font-weight: 500; }
.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; }

/* Hero visual cards */
.hero-visual { display: flex; justify-content: center; align-items: center; }
.hero-card-stack { position: relative; width: 320px; height: 320px; }
.hcard {
  position: absolute;
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow-lg);
  display: flex; align-items: center; gap: .75rem;
  font-weight: 600; font-size: .95rem; color: var(--gray-800);
  animation: float 6s ease-in-out infinite;
}
.hcard-icon { font-size: 1.5rem; }
.hcard-1 { top: 10%;  left: 0;   border-left: 4px solid var(--blue);   animation-delay: 0s; }
.hcard-2 { top: 40%;  right: 0;  border-left: 4px solid var(--green);  animation-delay: 2s; }
.hcard-3 { bottom: 5%; left: 10%; border-left: 4px solid var(--orange); animation-delay: 4s; }
@keyframes float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-10px)} }
.hero-wave { position: absolute; bottom: 0; left: 0; right: 0; line-height: 0; }
.hero-wave svg { width: 100%; height: 80px; }

/* ===== PROBLEM BANNER ===== */
.problem-banner {
  background: var(--gray-900);
  color: rgba(255,255,255,.9);
  padding: 2rem 0;
  text-align: center;
}
.problem-banner p { font-size: 1.05rem; max-width: 800px; margin: 0 auto; line-height: 1.7; }
.problem-banner strong { color: #fff; }

/* ===== MISSION & VISION ===== */
.mission-vision { background: var(--gray-50); }
.mv-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; margin-bottom: 3rem; }
.mv-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow);
  border-top: 4px solid transparent;
}
.mv-mission { border-top-color: var(--blue); }
.mv-vision  { border-top-color: var(--green); }
.mv-icon { margin-bottom: 1.25rem; }
.mv-card h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: .75rem; color: var(--gray-900); }
.mv-card p  { color: var(--gray-600); font-size: .98rem; }
.tagline-strip {
  display: flex; flex-wrap: wrap; gap: .5rem 1rem; justify-content: center;
  font-size: 1rem; font-weight: 600; color: var(--gray-800);
  background: #fff; padding: 1.25rem 2rem; border-radius: 50px;
  border: 1px solid var(--gray-200); box-shadow: var(--shadow);
}
.dot { color: var(--gray-400); }

/* ===== INITIATIVE ===== */
.initiative { position: relative; overflow: hidden; }
.initiative-bg {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, var(--blue-dk) 0%, #0a3d6b 50%, #062d4f 100%);
  z-index: -1;
}
.initiative-features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; margin-top: 1rem; }
.init-feat {
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  text-align: center;
  transition: background var(--transition), transform var(--transition);
}
.init-feat:hover { background: rgba(255,255,255,.14); transform: translateY(-4px); }
.init-feat-icon { font-size: 2rem; margin-bottom: 1rem; width: 60px; height: 60px; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto 1rem; }
.init-feat-icon.blue   { background: rgba(24,95,165,.3); }
.init-feat-icon.green  { background: rgba(29,158,117,.3); }
.init-feat-icon.orange { background: rgba(224,92,42,.3); }
.init-feat-icon.purple { background: rgba(123,31,162,.3); }
.init-feat h4 { color: #fff; font-size: 1.05rem; font-weight: 700; margin-bottom: .5rem; }
.init-feat p  { color: rgba(255,255,255,.75); font-size: .9rem; line-height: 1.6; }

/* ===== CAPABILITIES ===== */
.capabilities { background: #fff; }
.cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.75rem; }
.cap-card {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
  background: #fff;
}
.cap-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: var(--gray-200); }
.cap-icon { width: 56px; height: 56px; border-radius: var(--radius); display: flex; align-items: center; justify-content: center; margin-bottom: 1.25rem; }
.cap-card h3 { font-size: 1.1rem; font-weight: 700; color: var(--gray-900); margin-bottom: .75rem; }
.cap-card ul { padding-left: 0; }
.cap-card ul li {
  font-size: .9rem; color: var(--gray-600); padding: .3rem 0 .3rem 1.2rem; position: relative; line-height: 1.5;
}
.cap-card ul li::before { content: "→"; position: absolute; left: 0; color: var(--green); font-weight: 700; }

/* ===== COMMUNITY ===== */
.community { background: var(--gray-50); }
.community-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.community-text h2 { font-size: clamp(1.6rem, 2.5vw, 2.2rem); font-weight: 800; color: var(--gray-900); margin-bottom: 1rem; }
.community-text p  { color: var(--gray-600); margin-bottom: 1rem; }
.community-partners h4 { font-size: 1rem; font-weight: 700; color: var(--gray-800); margin-bottom: 1.25rem; }
.partner-tags { display: flex; flex-wrap: wrap; gap: .6rem; }
.partner-tags span {
  background: #fff;
  border: 1.5px solid var(--gray-200);
  border-radius: 50px;
  padding: .45rem 1rem;
  font-size: .85rem;
  font-weight: 500;
  color: var(--gray-700, #374151);
  transition: border-color var(--transition), background var(--transition);
}
.partner-tags span:hover { border-color: var(--blue); background: var(--blue-lt); color: var(--blue); }

/* ===== ETHICS ===== */
.ethics { background: #fff; }
.ethics-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.ethic-item { display: flex; gap: 1rem; align-items: flex-start; }
.ethic-dot { width: 12px; height: 12px; border-radius: 50%; flex-shrink: 0; margin-top: .45rem; }
.ethic-dot.blue   { background: var(--blue); }
.ethic-dot.green  { background: var(--green); }
.ethic-dot.orange { background: var(--orange); }
.ethic-dot.purple { background: var(--purple); }
.ethic-dot.teal   { background: var(--teal); }
.ethic-dot.red    { background: var(--red); }
.ethic-item h4 { font-size: 1rem; font-weight: 700; color: var(--gray-900); margin-bottom: .3rem; }
.ethic-item p  { font-size: .9rem; color: var(--gray-600); }

/* ===== GLOBAL COLLAB ===== */
.collab { background: var(--gray-50); }
.collab-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: start; }
.collab-text h2 { font-size: clamp(1.6rem, 2.5vw, 2.2rem); font-weight: 800; color: var(--gray-900); margin: .75rem 0 1rem; }
.collab-text p  { color: var(--gray-600); font-size: .98rem; }
.collab-pillars { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.pillar {
  background: #fff;
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--gray-200);
  transition: box-shadow var(--transition), transform var(--transition);
}
.pillar:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.pillar-num { font-size: .78rem; font-weight: 800; letter-spacing: .1em; color: var(--blue); display: block; margin-bottom: .3rem; }
.pillar h4 { font-size: .92rem; font-weight: 600; color: var(--gray-800); line-height: 1.4; }

/* ===== MULTI-LLM ARCH BLOCK ===== */
.arch-block {
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: var(--radius-lg);
  padding: 2rem 2.5rem;
  margin-bottom: 2.5rem;
}
.arch-title { color: #fff; font-size: 1.05rem; font-weight: 700; margin-bottom: 1.25rem; text-align: center; letter-spacing: .02em; }
.arch-sources { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: .75rem; }
.arch-source {
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: var(--radius);
  padding: .6rem 1.25rem;
  text-align: center;
}
.arch-engine {
  background: rgba(29,158,117,.35);
  border-color: rgba(29,158,117,.6);
}
.arch-src-label { font-size: .85rem; font-weight: 600; color: #fff; }
.arch-source--stacked { display: flex; flex-direction: column; align-items: center; gap: 0; padding: .5rem 1.25rem; }
.arch-src-divider { width: 80%; height: 1px; background: rgba(255,255,255,.25); margin: .4rem 0; }
.arch-src-sublabel { font-size: .75rem; font-weight: 500; color: rgba(255,255,255,.75); letter-spacing: .02em; }
.arch-arrow { color: rgba(255,255,255,.5); font-size: 1.3rem; font-weight: 300; }

/* ===== AI AGENT ECOSYSTEM ===== */
.agents { background: var(--gray-50); }
.agents-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
  margin-bottom: 2.5rem;
}
.agent-card {
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1.5px solid var(--gray-200);
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}
.agent-card:hover {
  box-shadow: 0 16px 48px rgba(0,0,0,.12);
  transform: translateY(-5px);
  border-color: var(--agent-color);
}
.agent-header {
  background: var(--agent-bg);
  padding: 1.5rem 1.75rem 1rem;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  border-bottom: 3px solid var(--agent-color);
}
.agent-icon { font-size: 2.2rem; line-height: 1; }
.agent-number {
  font-size: .75rem;
  font-weight: 800;
  letter-spacing: .12em;
  color: var(--agent-color);
  opacity: .7;
  margin-top: .2rem;
}
.agent-name {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--gray-900);
  padding: 1.25rem 1.75rem .25rem;
}
.agent-role {
  font-size: .82rem;
  font-weight: 600;
  color: var(--agent-color);
  padding: 0 1.75rem .75rem;
  text-transform: uppercase;
  letter-spacing: .06em;
}
.agent-features {
  padding: .5rem 1.75rem 1.25rem;
  flex: 1;
}
.agent-features li {
  font-size: .88rem;
  color: var(--gray-600);
  padding: .3rem 0 .3rem 1.2rem;
  position: relative;
  line-height: 1.5;
}
.agent-features li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--agent-color);
  font-weight: 700;
}
.agent-btn {
  display: block;
  margin: 0 1.75rem 1.75rem;
  padding: .7rem 1.5rem;
  background: var(--agent-color);
  color: #fff;
  font-weight: 700;
  font-size: .9rem;
  border-radius: 50px;
  text-align: center;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}
.agent-btn:hover {
  background: var(--agent-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0,0,0,.2);
}
.agent-btn { display: flex; flex-direction: column; align-items: center; gap: .15rem; }
.agent-btn-sub { font-size: .72rem; font-weight: 500; opacity: .8; letter-spacing: .04em; text-transform: uppercase; }
.agents-note {
  background: #fff;
  border: 1.5px solid var(--gray-200);
  border-left: 4px solid var(--green);
  border-radius: var(--radius);
  padding: 1.25rem 1.75rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  max-width: 800px;
  margin: 0 auto;
}
.agents-note-icon { font-size: 1.5rem; flex-shrink: 0; }
.agents-note p { font-size: .95rem; color: var(--gray-600); margin: 0; }
.agents-note strong { color: var(--gray-900); }

/* ===== EXPECTED IMPACT ===== */
.impact { position: relative; overflow: hidden; }
.impact-bg {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, #0a3d6b 0%, #062d4f 60%, #04221a 100%);
  z-index: -1;
}
.impact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.impact-item {
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  text-align: center;
  transition: background var(--transition), transform var(--transition);
}
.impact-item:hover { background: rgba(255,255,255,.13); transform: translateY(-3px); }
.impact-icon { font-size: 2rem; display: block; margin-bottom: .75rem; }
.impact-item h4 { color: #fff; font-size: 1rem; font-weight: 700; margin-bottom: .5rem; }
.impact-item p  { color: rgba(255,255,255,.75); font-size: .88rem; line-height: 1.6; margin: 0; }

/* ===== FOOTER AGENTS COLUMN ===== */
.footer-agents h5 { font-size: .9rem; font-weight: 700; color: #fff; margin-bottom: 1rem; text-transform: uppercase; letter-spacing: .08em; }
.footer-agents ul { display: flex; flex-direction: column; gap: .6rem; }
.footer-agents ul a { font-size: .88rem; color: rgba(255,255,255,.6); transition: color var(--transition); }
.footer-agents ul a:hover { color: #fff; }

/* ===== JOIN CTA ===== */
.join-cta {
  background: linear-gradient(135deg, var(--green) 0%, #0f6e56 100%);
  text-align: center;
}
.join-inner { max-width: 780px; margin: 0 auto; }
.join-cta h2 { font-size: clamp(2rem, 3.5vw, 2.8rem); font-weight: 800; color: #fff; margin-bottom: 1.5rem; }
.join-cta p  { color: rgba(255,255,255,.9); font-size: 1.05rem; margin-bottom: 1rem; }
.join-bold   { font-weight: 600; color: #fff; font-size: 1.1rem; margin-bottom: 2.5rem !important; }
.join-cta-buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ===== FOOTER ===== */
.footer { background: var(--gray-900); color: rgba(255,255,255,.8); padding: 4rem 0 0; }
.footer-inner { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.4fr; gap: 2.5rem; padding-bottom: 3rem; }
.footer-brand img { margin-bottom: 1rem; filter: brightness(1.1); }
.footer-brand p { font-size: .88rem; color: rgba(255,255,255,.6); margin-bottom: .4rem; }
.footer-url a { color: var(--green); font-weight: 600; }
.footer-links h5, .footer-contact h5, .footer-agents h5 { font-size: .9rem; font-weight: 700; color: #fff; margin-bottom: 1rem; text-transform: uppercase; letter-spacing: .08em; }
.footer-links ul { display: flex; flex-direction: column; gap: .6rem; }
.footer-links ul a { font-size: .88rem; color: rgba(255,255,255,.6); transition: color var(--transition); }
.footer-links ul a:hover { color: #fff; }
.footer-contact p { font-size: .88rem; color: rgba(255,255,255,.6); margin-bottom: .75rem; }
.footer-email { color: var(--teal); font-weight: 600; display: block; margin-bottom: 1.5rem; transition: color var(--transition); }
.footer-email:hover { color: #fff; }
.footer-tagline { font-size: .88rem; color: rgba(255,255,255,.5); font-style: italic; line-height: 1.7; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding: 1.25rem 0; text-align: center; }
.footer-bottom p { font-size: .82rem; color: rgba(255,255,255,.4); }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .initiative-features { grid-template-columns: repeat(2,1fr); }
  .agents-grid  { grid-template-columns: repeat(2,1fr); }
  .cap-grid     { grid-template-columns: repeat(2,1fr); }
  .ethics-grid  { grid-template-columns: repeat(2,1fr); }
  .impact-grid  { grid-template-columns: repeat(2,1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-agents { grid-column: 1 / -1; }
  .footer-contact { grid-column: 1 / -1; }
  .arch-sources { gap: .5rem; }
}

@media (max-width: 768px) {
  .section { padding: 3.5rem 0; }
  .hero { padding-top: 6rem; }
  .hero-inner   { grid-template-columns: 1fr; }
  .hero-visual  { display: none; }
  .hero-stats   { flex-wrap: wrap; gap: 1.25rem; }
  .mv-grid      { grid-template-columns: 1fr; }
  .community-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .collab-inner { grid-template-columns: 1fr; gap: 2rem; }
  .collab-pillars { grid-template-columns: 1fr; }
  .ethics-grid  { grid-template-columns: 1fr; }
  .cap-grid     { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 2rem; }
  .nav-inner { height: 80px; }
  .nav-logo img { height: 60px; }
  .nav-links {
    display: none; flex-direction: column; align-items: flex-start; gap: .75rem;
    position: absolute; top: 80px; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--gray-200);
    padding: 1.5rem; box-shadow: var(--shadow);
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .initiative-features { grid-template-columns: 1fr 1fr; }
  .tagline-strip { gap: .5rem; }
}

@media (max-width: 480px) {
  .initiative-features { grid-template-columns: 1fr; }
  .agents-grid  { grid-template-columns: 1fr; }
  .impact-grid  { grid-template-columns: 1fr; }
  .hero-cta { flex-direction: column; }
  .hero-cta .btn { text-align: center; }
  .join-cta-buttons { flex-direction: column; align-items: center; }
  .arch-sources { flex-direction: column; align-items: center; }
  .arch-arrow { transform: rotate(90deg); }
}