/* ==========================================================================
   The Pericles Protocol — Marketing Site Styles
   ========================================================================== */

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Primary — Deep Navy */
  --navy-950: #050d1a;
  --navy-900: #0a1628;
  --navy-800: #0f2240;
  --navy-700: #162f54;
  --navy-600: #1e3f6e;

  /* Accent — Gold/Amber */
  --gold-500: #c9a227;
  --gold-400: #d4b13a;
  --gold-300: #e0c35a;
  --gold-200: #ebd580;
  --gold-100: #f5eabf;

  /* Warm neutrals */
  --stone-50:  #fafaf9;
  --stone-100: #f5f5f4;
  --stone-200: #e7e5e4;
  --stone-300: #d6d3d1;
  --stone-400: #a8a29e;
  --stone-500: #78716c;
  --stone-600: #57534e;
  --stone-700: #44403c;
  --stone-800: #292524;
  --stone-900: #1c1917;

  /* Functional */
  --white: #ffffff;
  --black: #000000;

  /* Semantic */
  --primary: var(--navy-900);
  --accent: var(--gold-500);
  --accent-light: var(--gold-300);
  --text-primary: var(--stone-800);
  --text-secondary: var(--stone-500);
  --text-on-dark: rgba(255, 255, 255, 0.92);
  --text-muted-on-dark: rgba(255, 255, 255, 0.55);
  --bg-body: var(--white);
  --bg-alt: var(--stone-50);
  --border: var(--stone-200);

  /* Typography */
  --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', Menlo, monospace;

  /* Spacing */
  --nav-h: 72px;
  --max-w: 1200px;
  --max-w-narrow: 800px;
  --section-py: 120px;
  --section-py-sm: 80px;

  /* Borders & Shadows */
  --radius-sm: 4px;
  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -2px rgba(0,0,0,.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -4px rgba(0,0,0,.1);

  /* Transitions */
  --ease: cubic-bezier(.4, 0, .2, 1);
  --duration: 200ms;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
}

body {
  font-family: var(--font);
  color: var(--text-primary);
  background: var(--bg-body);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; transition: color var(--duration) var(--ease); }
a:hover { color: var(--accent-light); }

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

h1, h2, h3, h4, h5, h6 {
  color: var(--stone-900);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1, h2 {
  font-family: var(--font-display);
}

h1 { font-size: 4rem; font-weight: 900; line-height: 1.05; letter-spacing: -0.03em; }
h2 { font-size: 2.75rem; font-weight: 700; line-height: 1.15; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.container--narrow {
  max-width: var(--max-w-narrow);
}

.section {
  padding: var(--section-py) 0;
}

.section--dark {
  background: var(--navy-900);
  color: var(--text-on-dark);
}

.section--dark h2,
.section--dark h3,
.section--dark h4 {
  color: var(--white);
}

.section--alt {
  background: var(--bg-alt);
}

.grid {
  display: grid;
  gap: 32px;
}

.grid--2 { grid-template-columns: 1fr 1fr; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }

/* ---------- Section Header ---------- */
.section-header {
  margin-bottom: 64px;
}

.section-header--center {
  text-align: center;
}

.section-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold-500);
  margin-bottom: 16px;
}

.section--dark .section-label {
  color: var(--gold-400);
}

.section-header p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin-top: 16px;
}

.section-header--center p {
  margin-left: auto;
  margin-right: auto;
}

.section--dark .section-header p {
  color: var(--text-muted-on-dark);
}

/* ---------- Navigation ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  z-index: 100;
  background: rgba(10, 22, 40, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--duration) var(--ease), background var(--duration) var(--ease);
}

.nav--scrolled {
  border-bottom-color: rgba(255, 255, 255, 0.08);
  background: rgba(10, 22, 40, 0.95);
}

.nav__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
}

.nav__logo:hover { color: var(--white); }

.nav__logo-icon {
  width: 32px;
  height: 32px;
  background: var(--gold-500);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav__logo-icon svg {
  width: 18px;
  height: 18px;
  fill: var(--navy-900);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav__links a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: color var(--duration) var(--ease);
}

.nav__links a:hover,
.nav__links a.is-active {
  color: var(--white);
}

.nav__cta {
  display: inline-flex;
  align-items: center;
  padding: 8px 20px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--navy-900) !important;
  background: var(--gold-500);
  border-radius: var(--radius-sm);
  transition: background var(--duration) var(--ease);
}

.nav__cta:hover {
  background: var(--gold-400);
  color: var(--navy-900) !important;
}

.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav__hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--white);
  border-radius: 1px;
  transition: transform var(--duration) var(--ease), opacity var(--duration) var(--ease);
}

.nav__mobile {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--navy-900);
  padding: 32px 24px;
  z-index: 99;
}

.nav__mobile.is-open {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.nav__mobile a {
  display: block;
  color: rgba(255, 255, 255, 0.8);
  font-size: 1.125rem;
  font-weight: 500;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  text-decoration: none;
}

.nav__mobile a:hover {
  color: var(--white);
}

.nav__mobile .btn {
  margin-top: 16px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font);
  font-size: 0.9375rem;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--duration) var(--ease);
  line-height: 1;
}

.btn--gold {
  background: var(--gold-500);
  color: var(--navy-900);
}

.btn--gold:hover {
  background: var(--gold-400);
  color: var(--navy-900);
  transform: translateY(-1px);
}

.btn--outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255, 255, 255, 0.25);
}

.btn--outline:hover {
  border-color: rgba(255, 255, 255, 0.6);
  color: var(--white);
}

.btn--lg {
  font-size: 1rem;
  padding: 16px 36px;
}

.btn--dark {
  background: var(--navy-900);
  color: var(--white);
}

.btn--dark:hover {
  background: var(--navy-800);
  color: var(--white);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--navy-900);
  overflow: hidden;
  padding-top: var(--nav-h);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% 40%, rgba(30, 63, 110, 0.4) 0%, transparent 70%),
    radial-gradient(ellipse 60% 40% at 70% 60%, rgba(201, 162, 39, 0.06) 0%, transparent 60%);
  animation: hero-glow 20s ease-in-out infinite alternate;
}

@keyframes hero-glow {
  0%   { opacity: 1; }
  100% { opacity: 0.7; }
}

/* Geometric grid pattern */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 20%, transparent 70%);
}

.hero .container {
  position: relative;
  z-index: 1;
  padding-top: 80px;
  padding-bottom: 80px;
}

.hero__label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--gold-500);
  margin-bottom: 24px;
  position: relative;
  padding-top: 20px;
  opacity: 0;
  transform: translateY(20px);
  animation: hero-fade-in 0.7s ease forwards 0.1s;
}

.hero__label::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 48px;
  height: 3px;
  background: var(--gold-500);
  animation: label-line 0.6s ease forwards 0.3s;
  transform-origin: left;
  transform: scaleX(0);
}

@keyframes label-line {
  to { transform: scaleX(1); }
}

.hero__title {
  font-family: var(--font-display);
  font-size: 4.5rem;
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.03em;
  color: var(--white);
  max-width: 720px;
  margin-bottom: 24px;
  opacity: 0;
  transform: translateY(20px);
  animation: hero-fade-in 0.7s ease forwards 0.25s;
}

.hero__subtitle {
  font-size: 1.1875rem;
  line-height: 1.7;
  color: var(--text-muted-on-dark);
  max-width: 560px;
  margin-bottom: 40px;
  opacity: 0;
  transform: translateY(20px);
  animation: hero-fade-in 0.7s ease forwards 0.4s;
}

.hero__actions {
  display: flex;
  gap: 16px;
  margin-bottom: 80px;
  opacity: 0;
  transform: translateY(20px);
  animation: hero-fade-in 0.7s ease forwards 0.55s;
}

@keyframes hero-fade-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero__stats {
  display: flex;
  gap: 48px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 40px;
  opacity: 0;
  animation: hero-fade-in 0.7s ease forwards 0.7s;
}

.hero__stat {
  text-align: left;
}

.hero__stat-value {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--gold-400);
  line-height: 1;
  margin-bottom: 6px;
}

.hero__stat-label {
  font-size: 0.8125rem;
  color: var(--text-muted-on-dark);
  letter-spacing: 0.02em;
}

/* ---------- Problem Section ---------- */
.problem-grid {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 64px;
  align-items: start;
}

.problem-cards {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.problem-card {
  padding: 28px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--duration) var(--ease);
}

.problem-card:hover {
  border-color: var(--stone-300);
}

.problem-card__title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--stone-900);
}

.problem-card__body {
  font-size: 0.9375rem;
  color: var(--stone-600);
  line-height: 1.65;
}

.stat-stack {
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: sticky;
  top: calc(var(--nav-h) + 32px);
}

.stat-callout {
  padding: 28px;
  background: var(--navy-900);
  border-radius: var(--radius);
  text-align: center;
}

.stat-callout__number {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 700;
  color: var(--gold-400);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-callout__label {
  font-size: 0.875rem;
  color: var(--text-muted-on-dark);
  line-height: 1.5;
}

/* ---------- Protocol Cards ---------- */
.protocol-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.protocol-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-left: 3px solid var(--gold-500);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: transform var(--duration) var(--ease), border-color var(--duration) var(--ease), background var(--duration) var(--ease);
}

.protocol-card:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.06);
  border-left-color: var(--gold-300);
}

.protocol-card__icon {
  width: 44px;
  height: 44px;
  background: rgba(201, 162, 39, 0.12);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.protocol-card__icon svg {
  width: 22px;
  height: 22px;
  stroke: var(--gold-400);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.protocol-card__title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 10px;
}

.protocol-card__desc {
  font-size: 0.9375rem;
  color: var(--text-muted-on-dark);
  line-height: 1.65;
}

/* ---------- Science / Metrics ---------- */
.science-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.metric-framework {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.metric-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.metric-row__header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.metric-row__label {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--stone-700);
  letter-spacing: 0.02em;
}

.metric-row__score {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--gold-500);
}

.metric-row__track {
  height: 8px;
  background: var(--stone-100);
  border-radius: 4px;
  overflow: hidden;
}

.metric-row__bar {
  height: 100%;
  background: linear-gradient(90deg, var(--gold-500), var(--gold-300));
  border-radius: 4px;
  width: 0%;
  transition: width 1.2s cubic-bezier(.4, 0, .2, 1);
}

.metric-row.is-visible .metric-row__bar {
  /* Width set inline via data attribute */
}

.science-content h3 {
  margin-bottom: 16px;
}

.science-content p {
  font-size: 1rem;
  color: var(--stone-600);
  line-height: 1.7;
}

.science-quote {
  margin-top: 32px;
  padding: 24px 28px;
  background: var(--navy-900);
  border-radius: var(--radius);
  border-left: 3px solid var(--gold-500);
}

.science-quote p {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-style: italic;
  color: var(--text-on-dark);
  line-height: 1.6;
}

/* ---------- Case Studies ---------- */
.case-studies {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.case-study {
  padding: 36px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 28px;
  align-items: start;
  transition: border-color var(--duration) var(--ease);
}

.case-study:hover {
  border-color: var(--stone-300);
}

.case-study__tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.case-study__tag--warning {
  background: #fef3c7;
  color: #92400e;
}

.case-study__tag--success {
  background: #d1fae5;
  color: #065f46;
}

.case-study__tag--danger {
  background: #fee2e2;
  color: #991b1b;
}

.case-study__content h3 {
  margin-bottom: 10px;
}

.case-study__content p {
  font-size: 0.9375rem;
  color: var(--stone-600);
  line-height: 1.7;
}

/* ---------- Audience Cards ---------- */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.audience-card {
  padding: 36px 32px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  transition: border-color var(--duration) var(--ease), transform var(--duration) var(--ease);
}

.audience-card:hover {
  border-color: var(--gold-300);
  transform: translateY(-2px);
}

.audience-card__icon {
  width: 56px;
  height: 56px;
  background: var(--navy-900);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.audience-card__icon svg {
  width: 26px;
  height: 26px;
  stroke: var(--gold-400);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.audience-card__title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.audience-card__desc {
  font-size: 0.9375rem;
  color: var(--stone-500);
  line-height: 1.65;
}

/* ---------- About / Team ---------- */
.about-content {
  max-width: 640px;
}

.about-content p {
  font-size: 1.0625rem;
  color: var(--text-muted-on-dark);
  line-height: 1.7;
}

.credentials {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
}

.credential {
  padding: 28px 24px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  text-align: center;
}

.credential__value {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gold-400);
  margin-bottom: 8px;
}

.credential__label {
  font-size: 0.875rem;
  color: var(--text-muted-on-dark);
}

/* ---------- CTA Banner ---------- */
.cta-section {
  padding: var(--section-py) 0;
  background: var(--navy-900);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 50% at 50% 50%, rgba(201, 162, 39, 0.06) 0%, transparent 70%);
}

.cta-banner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
}

.cta-banner h2 {
  color: var(--white);
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.cta-banner p {
  color: var(--text-muted-on-dark);
  font-size: 1.0625rem;
  margin-bottom: 36px;
}

.cta-banner__actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 24px;
}

.cta-banner__note {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.3);
}

/* ---------- Footer ---------- */
.footer {
  background: var(--navy-950);
  padding: 48px 0 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer__brand {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.4);
  letter-spacing: 0.05em;
}

.footer__links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer__links a {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.4);
  text-decoration: none;
  transition: color var(--duration) var(--ease);
}

.footer__links a:hover {
  color: rgba(255, 255, 255, 0.7);
}

/* ---------- Scroll Animations ---------- */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.animate-on-scroll:nth-child(2) { transition-delay: 0.1s; }
.animate-on-scroll:nth-child(3) { transition-delay: 0.2s; }
.animate-on-scroll:nth-child(4) { transition-delay: 0.15s; }
.animate-on-scroll:nth-child(5) { transition-delay: 0.2s; }
.animate-on-scroll:nth-child(6) { transition-delay: 0.25s; }

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

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  h1, .hero__title { font-size: 3.25rem; }
  h2 { font-size: 2.25rem; }

  .protocol-grid { grid-template-columns: repeat(2, 1fr); }
  .audience-grid { grid-template-columns: repeat(2, 1fr); }
  .credentials { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root {
    --section-py: 80px;
    --section-py-sm: 56px;
    --nav-h: 64px;
  }

  h1, .hero__title { font-size: 2.5rem; }
  h2 { font-size: 1.875rem; }
  .cta-banner h2 { font-size: 2rem; }

  .nav__links { display: none; }
  .nav__hamburger { display: flex; }

  .hero .container {
    padding-top: 48px;
    padding-bottom: 48px;
  }

  .hero__actions {
    flex-direction: column;
    margin-bottom: 48px;
  }

  .hero__stats {
    flex-direction: column;
    gap: 24px;
  }

  .problem-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .stat-stack {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 12px;
  }

  .stat-callout {
    flex: 1;
    min-width: 140px;
  }

  .stat-callout__number {
    font-size: 2rem;
  }

  .protocol-grid,
  .audience-grid {
    grid-template-columns: 1fr;
  }

  .science-grid {
    grid-template-columns: 1fr;
  }

  .case-study {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .credentials {
    grid-template-columns: 1fr;
  }

  .cta-banner__actions {
    flex-direction: column;
    align-items: center;
  }

  .section-header {
    margin-bottom: 40px;
  }

  .footer__inner {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  h1, .hero__title { font-size: 2rem; }
  h2 { font-size: 1.625rem; }

  .stat-stack {
    flex-direction: column;
  }
}