/* ─── TOKENS ─── */
:root {
  --green:        #2C3E2C;
  --green-light:  #3d5c3d;
  --cream:        #F5EEE0;
  --cream-dark:   #ede4ce;
  --orange:       #E8712A;
  --orange-light: #FFF0E6;
  --text:         #1a2a1a;
  --text-muted:   #5a6e5a;
  --white:        #ffffff;
  --radius:       16px;
  --radius-lg:    28px;
  --shadow:       0 4px 24px rgba(44,62,44,0.10);
  --shadow-lg:    0 12px 48px rgba(44,62,44,0.15);
  --font-display: 'Fraunces', Georgia, serif;
  --font-body:    'DM Sans', system-ui, sans-serif;
}

/* ─── RESET ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--cream);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: var(--font-body); cursor: pointer; border: none; background: none; }

/* ─── CONTAINER ─── */
.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

/* ─── NAV ─── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(245,238,224,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(44,62,44,0.10);
  transition: box-shadow 0.3s;
}
.nav.scrolled { box-shadow: 0 2px 20px rgba(44,62,44,0.10); }
.nav-inner {
  max-width: 1160px; margin: 0 auto; padding: 0 24px;
  height: 64px;
  display: flex; align-items: center; justify-content: space-between;
}
.logo {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-display); font-weight: 700; font-size: 1.4rem;
  color: var(--green); letter-spacing: -0.01em;
}
.logo-carrot { font-size: 1.5rem; }
.nav-links {
  display: flex; align-items: center; gap: 8px;
}
.nav-links a {
  font-size: 0.9rem; font-weight: 500; color: var(--text-muted);
  padding: 6px 12px; border-radius: 50px;
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--green); }
.nav-links a.active { font-weight: 600; }
.nav-cta {
  background: var(--green) !important;
  color: var(--cream) !important;
  padding: 8px 18px !important;
  border-radius: 50px !important;
  font-weight: 600 !important;
}
.nav-cta:hover { background: var(--green-light) !important; }

.hamburger {
  display: none; flex-direction: column; gap: 5px;
  padding: 6px; border-radius: 8px;
  transition: background 0.2s;
}
.hamburger:hover { background: var(--cream-dark); }
.hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--green); border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ─── BUTTONS ─── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 13px 28px; border-radius: 50px;
  font-family: var(--font-body); font-size: 0.95rem; font-weight: 600;
  transition: all 0.2s; white-space: nowrap;
}
.btn-primary  { background: var(--green); color: var(--cream); }
.btn-primary:hover { background: var(--green-light); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(44,62,44,0.25); }
.btn-outline  { background: transparent; color: var(--green); border: 2px solid var(--green); }
.btn-outline:hover { background: var(--green); color: var(--cream); }
.btn-ghost    { background: transparent; color: var(--green); padding: 13px 4px; }
.btn-ghost:hover { color: var(--orange); }
.btn-cream    { background: var(--cream); color: var(--green); }
.btn-cream:hover { background: var(--white); transform: translateY(-1px); }
.btn-cream-sm { background: var(--cream); color: var(--green); padding: 8px 20px; font-size: 0.875rem; border-radius: 50px; font-weight: 600; display: inline-flex; }
.btn-cream-sm:hover { background: var(--white); }
.btn-orange   { background: var(--orange); color: var(--white); }
.btn-orange:hover { opacity: 0.9; transform: translateY(-1px); }

/* ─── SECTION TOKENS ─── */
.section { padding: 96px 0; }
.section-green  { background: var(--green); }
.section-cream  { background: var(--cream-dark); }
.section-white  { background: var(--white); }

.section-label {
  display: inline-block;
  font-size: 0.75rem; font-weight: 600; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--orange);
  margin-bottom: 16px;
}
.section-label.light { color: rgba(245,238,224,0.7); }

.section-h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700; line-height: 1.15;
  color: var(--text); margin-bottom: 48px;
}
.section-h2 em { font-style: italic; color: var(--orange); }
.section-h2.light { color: var(--cream); }
.section-h2.light em { color: rgba(245,238,224,0.7); }

.center-cta { text-align: center; margin-top: 48px; }

/* ─── HERO ─── */
.hero {
  min-height: 100vh; padding-top: 64px;
  display: flex; flex-direction: column; justify-content: center;
  position: relative; overflow: hidden;
  background: var(--cream);
}
.hero-bg-text {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-display); font-weight: 900;
  font-size: clamp(60px, 10vw, 140px);
  color: rgba(44,62,44,0.04);
  white-space: nowrap; pointer-events: none;
  letter-spacing: -0.02em; line-height: 1;
  width: 200%; text-align: center;
}
.hero-inner {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 64px; align-items: center;
  padding-top: 40px; padding-bottom: 80px;
}
.hero-eyebrow {
  font-size: 0.85rem; font-weight: 500; color: var(--text-muted);
  margin-bottom: 20px;
}
.hero-h1 {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 900; line-height: 1.05;
  color: var(--green); margin-bottom: 24px;
  letter-spacing: -0.02em;
}
.hero-h1 em { font-style: italic; color: var(--orange); }
.hero-sub {
  font-size: 1.1rem; line-height: 1.7;
  color: var(--text-muted); max-width: 500px;
  margin-bottom: 36px;
}
.hero-ctas { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }

.hero-stats { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.hero-stat { display: flex; flex-direction: column; }
.stat-n {
  font-family: var(--font-display);
  font-size: 2rem; font-weight: 700; color: var(--green);
  line-height: 1;
}
.stat-l { font-size: 0.75rem; color: var(--text-muted); margin-top: 4px; }
.stat-div { width: 1px; height: 40px; background: rgba(44,62,44,0.2); }

.hero-img-frame {
  position: relative; border-radius: var(--radius-lg);
  overflow: hidden;
}
.hero-img { width: 100%; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }
.hero-badge {
  position: absolute; bottom: 24px; left: 24px;
  background: var(--white);
  border-radius: 14px; padding: 12px 16px;
  display: flex; align-items: center; gap: 10px;
  box-shadow: var(--shadow);
  font-size: 0.85rem; font-weight: 600; color: var(--green);
  line-height: 1.3;
}

/* ─── TICKER ─── */
.ticker {
  background: var(--green); color: var(--cream);
  padding: 14px 0; overflow: hidden; white-space: nowrap;
}
.ticker-track {
  display: inline-flex; gap: 24px;
  animation: ticker 30s linear infinite;
  font-size: 0.875rem; font-weight: 500;
}
.ticker .dot { opacity: 0.4; }
@keyframes ticker { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ─── FOUR GRID ─── */
.four-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

/* ─── PROBLEM CARDS ─── */
.problem-card {
  background: var(--white); border-radius: var(--radius);
  padding: 32px 24px;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}
.problem-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.picon { font-size: 2rem; margin-bottom: 16px; }
.problem-card h3 {
  font-family: var(--font-display); font-size: 1.15rem; font-weight: 700;
  color: var(--green); margin-bottom: 10px;
}
.problem-card p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.65; }
.problem-card strong { color: var(--text); }

/* ─── CTA CARDS ─── */
.cta-card {
  background: rgba(255,255,255,0.12); border-radius: var(--radius);
  padding: 32px 24px; border: 1px solid rgba(245,238,224,0.2);
  display: flex; flex-direction: column; gap: 8px;
  transition: background 0.2s, transform 0.2s;
  cursor: pointer;
}
.cta-card:hover { background: rgba(255,255,255,0.2); transform: translateY(-4px); }
.cta-icon { font-size: 2rem; margin-bottom: 8px; }
.cta-card h3 { font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; color: var(--cream); }
.cta-card p { font-size: 0.875rem; color: rgba(245,238,224,0.7); line-height: 1.55; flex: 1; }
.cta-arrow { color: var(--orange); font-size: 1.2rem; font-weight: 700; margin-top: 12px; }
.cta-intro { color: rgba(245,238,224,0.8); max-width: 560px; margin-bottom: 48px; font-size: 1.05rem; }

/* ─── SPLIT LAYOUT ─── */
.split-layout {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 80px; align-items: center;
}
.split-layout.reverse { direction: rtl; }
.split-layout.reverse > * { direction: ltr; }
.split-intro { font-size: 1.05rem; color: rgba(245,238,224,0.8); margin-bottom: 36px; }
.split-img { width: 100%; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }
.split-img.rounded { border-radius: var(--radius-lg); }

/* ─── STEPS ─── */
.steps { display: flex; flex-direction: column; gap: 24px; margin-bottom: 40px; }
.step { display: flex; gap: 20px; align-items: flex-start; color: rgba(245,238,224,0.85); font-size: 0.95rem; }
.step-num {
  font-family: var(--font-display); font-size: 1.5rem; font-weight: 700;
  color: var(--orange); min-width: 40px; line-height: 1.2;
}
.step strong { color: var(--cream); }

/* ─── PRODUCT TABS ─── */
.product-tabs { display: flex; gap: 8px; margin-bottom: 32px; }
.ptab {
  padding: 10px 24px; border-radius: 50px;
  font-size: 0.9rem; font-weight: 600; color: var(--text-muted);
  border: 2px solid transparent; background: var(--white);
  transition: all 0.2s;
}
.ptab.active { background: var(--green); color: var(--cream); border-color: var(--green); }
.ptab:hover:not(.active) { border-color: var(--green); color: var(--green); }
.ptab-content { display: none; }
.ptab-content.active { display: block; }
.product-full-img {
  width: 100%; max-height: 400px; object-fit: contain;
  background: var(--white); border-radius: var(--radius-lg);
  padding: 24px; box-shadow: var(--shadow);
  margin-bottom: 24px;
}
.product-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.product-tags span {
  background: var(--green); color: var(--cream);
  padding: 6px 18px; border-radius: 50px;
  font-size: 0.85rem; font-weight: 500;
}
.product-note { text-align: center; color: var(--text-muted); font-size: 0.9rem; margin-top: 32px; }

/* ─── FOUNDER SECTION ─── */
.founder-wrap {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 80px; align-items: center;
}
.quote-block { display: flex; flex-direction: column; gap: 24px; }
.quote-mark {
  font-family: var(--font-display); font-size: 8rem; font-weight: 700;
  color: var(--orange); line-height: 0.5; opacity: 0.3;
}
blockquote {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  font-style: italic; font-weight: 300;
  color: var(--green); line-height: 1.5;
}
.founder-attr { display: flex; align-items: center; gap: 16px; }
.founder-avatar {
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--green); color: var(--cream);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-size: 1.2rem; font-weight: 700;
  flex-shrink: 0;
}
.founder-attr-text { display: flex; flex-direction: column; gap: 3px; }
.founder-attr-text strong { font-weight: 600; color: var(--text); }
.founder-attr-text span { font-size: 0.85rem; color: var(--text-muted); }
.founder-side-img { width: 100%; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }

/* ─── FOOTER ─── */
.footer { background: var(--green); color: var(--cream); padding: 64px 0 0; }
.footer-inner {
  display: grid; grid-template-columns: 2fr 1fr 1fr;
  gap: 48px; padding-bottom: 48px;
  border-bottom: 1px solid rgba(245,238,224,0.15);
}
.footer-brand .logo { margin-bottom: 12px; color: var(--cream); }
.footer-brand p { font-size: 0.9rem; color: rgba(245,238,224,0.7); }
.footer-school { font-size: 0.8rem !important; margin-top: 8px; }
.footer-links { display: flex; flex-direction: column; gap: 12px; }
.footer-links a { font-size: 0.9rem; color: rgba(245,238,224,0.7); transition: color 0.2s; }
.footer-links a:hover { color: var(--cream); }
.footer-contact p { font-size: 0.9rem; color: rgba(245,238,224,0.7); margin-bottom: 12px; }
.footer-bottom { text-align: center; padding: 24px 0; font-size: 0.8rem; color: rgba(245,238,224,0.4); }

/* ─── PAGE HERO (inner pages) ─── */
.page-hero {
  background: var(--green); padding: 140px 0 80px;
  text-align: center;
}
.page-hero-label { color: rgba(245,238,224,0.6); font-size: 0.75rem; letter-spacing: 0.12em; text-transform: uppercase; font-weight: 600; margin-bottom: 16px; }
.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700; color: var(--cream);
  line-height: 1.1; margin-bottom: 20px;
}
.page-hero h1 em { font-style: italic; color: rgba(245,238,224,0.6); }
.page-hero p { font-size: 1.1rem; color: rgba(245,238,224,0.75); max-width: 600px; margin: 0 auto; }

/* ─── ABOUT PAGE ─── */
.about-story { max-width: 720px; margin: 0 auto; }
.about-story h2 { font-family: var(--font-display); font-size: 1.8rem; font-weight: 700; color: var(--green); margin-bottom: 16px; margin-top: 48px; }
.about-story p { font-size: 1.05rem; color: var(--text-muted); line-height: 1.8; margin-bottom: 24px; }
.about-story strong { color: var(--text); }

.timeline { position: relative; padding-left: 40px; margin: 48px 0; }
.timeline::before { content:''; position: absolute; left: 12px; top: 0; bottom: 0; width: 2px; background: var(--cream-dark); }
.tl-item { position: relative; margin-bottom: 36px; }
.tl-dot {
  position: absolute; left: -34px; top: 4px;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--orange); border: 3px solid var(--cream);
  box-shadow: 0 0 0 2px var(--orange);
}
.tl-year { font-size: 0.75rem; font-weight: 700; color: var(--orange); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 4px; }
.tl-item h3 { font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; color: var(--green); margin-bottom: 6px; }
.tl-item p { font-size: 0.9rem; color: var(--text-muted); }

.deca-badge {
  background: var(--green); color: var(--cream);
  border-radius: var(--radius); padding: 32px;
  display: flex; gap: 24px; align-items: flex-start;
  margin: 48px 0;
}
.deca-badge-icon { font-size: 2.5rem; flex-shrink: 0; }
.deca-badge h3 { font-family: var(--font-display); font-size: 1.2rem; font-weight: 700; margin-bottom: 8px; color: var(--cream); }
.deca-badge p { font-size: 0.9rem; color: rgba(245,238,224,0.75); line-height: 1.65; }

/* ─── PROBLEM PAGE ─── */
.stat-callout {
  background: var(--green); color: var(--cream);
  border-radius: var(--radius-lg); padding: 64px;
  text-align: center; margin: 48px 0;
}
.stat-callout .big-num {
  font-family: var(--font-display); font-size: clamp(4rem, 10vw, 8rem);
  font-weight: 900; color: var(--orange); line-height: 1;
  display: block;
}
.stat-callout p { font-size: 1.1rem; color: rgba(245,238,224,0.8); margin-top: 16px; max-width: 480px; margin-left: auto; margin-right: auto; }

.research-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; margin: 48px 0; }
.research-card {
  background: var(--white); border-radius: var(--radius); padding: 32px;
  box-shadow: var(--shadow); border-left: 4px solid var(--orange);
}
.research-card .rc-source { font-size: 0.75rem; font-weight: 700; color: var(--orange); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 8px; }
.research-card h3 { font-family: var(--font-display); font-size: 1.1rem; color: var(--green); margin-bottom: 10px; }
.research-card p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.65; }

/* ─── SOLUTION PAGE ─── */
.model-steps { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; margin: 48px 0; }
.model-step {
  background: var(--white); border-radius: var(--radius); padding: 36px 28px;
  box-shadow: var(--shadow); text-align: center;
  position: relative;
}
.model-step-num {
  font-family: var(--font-display); font-size: 3rem; font-weight: 900;
  color: var(--orange); opacity: 0.3; line-height: 1;
  margin-bottom: 16px;
}
.model-step h3 { font-family: var(--font-display); font-size: 1.15rem; color: var(--green); margin-bottom: 10px; }
.model-step p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.65; }

.metrics-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; margin: 48px 0; }
.metric-card {
  background: var(--green); color: var(--cream);
  border-radius: var(--radius); padding: 32px 20px; text-align: center;
}
.metric-num {
  font-family: var(--font-display); font-size: 2.5rem; font-weight: 700;
  color: var(--orange); line-height: 1; display: block; margin-bottom: 8px;
}
.metric-label { font-size: 0.8rem; color: rgba(245,238,224,0.7); line-height: 1.4; }

.channel-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin: 48px 0; }
.channel-card {
  background: var(--white); border-radius: var(--radius); padding: 32px;
  box-shadow: var(--shadow);
}
.channel-card h3 { font-family: var(--font-display); font-size: 1.15rem; color: var(--green); margin-bottom: 16px; display: flex; align-items: center; gap: 10px; }
.channel-card ul { display: flex; flex-direction: column; gap: 10px; }
.channel-card li { font-size: 0.9rem; color: var(--text-muted); padding-left: 20px; position: relative; }
.channel-card li::before { content: '→'; position: absolute; left: 0; color: var(--orange); font-weight: 700; }

/* ─── GET INVOLVED / FORMS ─── */
.audience-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 48px; }
.atab {
  padding: 10px 20px; border-radius: 50px;
  font-size: 0.875rem; font-weight: 600;
  border: 2px solid var(--green); color: var(--green);
  background: transparent; transition: all 0.2s;
}
.atab.active { background: var(--green); color: var(--cream); }
.atab:hover:not(.active) { background: rgba(44,62,44,0.06); }

.form-section { display: none; }
.form-section.active { display: block; }

.form-panel {
  background: var(--white); border-radius: var(--radius-lg);
  padding: 48px; box-shadow: var(--shadow-lg);
  max-width: 680px;
}
.form-panel h2 { font-family: var(--font-display); font-size: 1.6rem; color: var(--green); margin-bottom: 8px; }
.form-panel .form-sub { color: var(--text-muted); margin-bottom: 36px; font-size: 0.95rem; }

.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 0.875rem; font-weight: 600; color: var(--green); margin-bottom: 6px; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%; padding: 12px 16px;
  border: 2px solid rgba(44,62,44,0.15); border-radius: var(--radius);
  font-family: var(--font-body); font-size: 0.95rem; color: var(--text);
  background: var(--cream); outline: none;
  transition: border-color 0.2s;
  -webkit-appearance: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--green); background: var(--white); }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.form-success {
  display: none; text-align: center; padding: 48px 32px;
  background: #e8f5e9; border-radius: var(--radius-lg);
  border: 2px solid #a5d6a7;
}
.form-success h3 { font-family: var(--font-display); font-size: 1.5rem; color: var(--green); margin-bottom: 8px; }
.form-success p { color: var(--text-muted); }

.involved-layout { display: grid; grid-template-columns: 1fr 1.5fr; gap: 64px; align-items: start; }
.involved-sidebar { position: sticky; top: 80px; }
.sidebar-nav { display: flex; flex-direction: column; gap: 4px; margin-top: 24px; }
.snav-item {
  padding: 12px 16px; border-radius: var(--radius);
  font-size: 0.9rem; font-weight: 600; color: var(--text-muted);
  display: flex; gap: 12px; align-items: center;
  transition: all 0.2s; cursor: pointer; border: none; background: none;
  text-align: left; width: 100%;
}
.snav-item:hover { background: var(--cream-dark); color: var(--green); }
.snav-item.active { background: var(--green); color: var(--cream); }
.snav-item span:first-child { font-size: 1.2rem; }

/* ─── CONTACT ─── */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 64px; align-items: start; }
.contact-info h2 { font-family: var(--font-display); font-size: 1.8rem; color: var(--green); margin-bottom: 16px; }
.contact-info p { color: var(--text-muted); margin-bottom: 32px; font-size: 0.95rem; line-height: 1.7; }
.contact-detail { display: flex; gap: 12px; align-items: flex-start; margin-bottom: 20px; }
.contact-detail-icon { font-size: 1.3rem; margin-top: 2px; }
.contact-detail strong { display: block; font-size: 0.875rem; color: var(--green); margin-bottom: 2px; }
.contact-detail span { font-size: 0.9rem; color: var(--text-muted); }

/* ─── RESPONSIVE ─── */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { order: -1; }
  .hero-h1 { font-size: clamp(2.4rem, 7vw, 3.5rem); }
  .four-grid { grid-template-columns: 1fr 1fr; }
  .split-layout, .split-layout.reverse { grid-template-columns: 1fr; gap: 40px; direction: ltr; }
  .split-layout.reverse .split-visual { order: -1; }
  .founder-wrap { grid-template-columns: 1fr; gap: 40px; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .model-steps { grid-template-columns: 1fr; }
  .metrics-grid { grid-template-columns: 1fr 1fr; }
  .research-grid { grid-template-columns: 1fr; }
  .channel-grid { grid-template-columns: 1fr; }
  .involved-layout { grid-template-columns: 1fr; }
  .involved-sidebar { position: static; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
}

@media (max-width: 640px) {
  .nav-links {
    position: fixed; top: 64px; left: 0; right: 0;
    background: var(--cream); flex-direction: column;
    padding: 24px; gap: 4px; border-bottom: 1px solid var(--cream-dark);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { display: block; padding: 12px 16px; font-size: 1rem; }
  .hamburger { display: flex; }
  .four-grid { grid-template-columns: 1fr; }
  .metrics-grid { grid-template-columns: 1fr 1fr; }
  .hero-stats { gap: 16px; }
  .stat-div { display: none; }
  .hero-ctas { flex-direction: column; align-items: flex-start; }
  .form-panel { padding: 32px 20px; }
  .stat-callout { padding: 40px 24px; }
  .audience-tabs { gap: 6px; }
  .atab { font-size: 0.8rem; padding: 8px 14px; }
  .page-hero { padding: 120px 0 60px; }
  .section-h2 { margin-bottom: 32px; }
}

/* ─── ANIMATIONS ─── */
.fade-in { opacity: 0; transform: translateY(20px); transition: opacity 0.5s ease, transform 0.5s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }