:root {
  color-scheme: light dark;
  --color-jade: #0f766e;
  --color-turquoise: #14b8a6;
  --color-gold: #f59e0b;
  --color-red: #ef4444;
  --color-night: #0b1020;
  --color-surface: #f8fafc;
  --color-surface-dark: #111827;
  --color-text: #0f172a;
  --color-text-muted: #334155;
  --color-border: rgba(15, 23, 42, 0.1);
  --color-border-dark: rgba(148, 163, 184, 0.2);
  --shadow-soft: 0 20px 45px -24px rgba(15, 23, 42, 0.4);
  --radius-lg: 1.25rem;
  --radius-md: 1rem;
  --radius-sm: 0.75rem;
  --font-body:
    'Inter', 'DM Sans', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-heading:
    'DM Sans', 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-surface: #0b1120;
    --color-surface-dark: #020617;
    --color-text: #e2e8f0;
    --color-text-muted: #cbd5f5;
    --color-border: rgba(148, 163, 184, 0.2);
    --shadow-soft: 0 20px 45px -24px rgba(15, 23, 42, 0.7);
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-text);
  background: linear-gradient(
    180deg,
    var(--color-surface) 0%,
    #ffffff 35%,
    var(--color-surface) 100%
  );
  min-height: 100vh;
}

main {
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--color-turquoise);
  outline-offset: 3px;
}

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

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.container {
  width: min(100% - 2.5rem, 1160px);
  margin-inline: auto;
}

header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248, 250, 252, 0.9);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
}

@media (prefers-color-scheme: dark) {
  header {
    background: rgba(11, 17, 32, 0.92);
    border-bottom-color: var(--color-border);
  }
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0.5rem;
}

.brand {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.3rem, 1.2rem + 0.4vw, 1.6rem);
  color: var(--color-jade);
  letter-spacing: 0.02em;
}

nav ul {
  display: flex;
  gap: clamp(0.75rem, 0.5rem + 1vw, 1.75rem);
  align-items: center;
}

nav a {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-muted);
  padding: 0.35rem 0.5rem;
  border-radius: 999px;
  transition:
    color 0.2s ease,
    background-color 0.2s ease;
}

nav a:hover,
nav a:focus-visible {
  color: var(--color-jade);
  background: rgba(20, 184, 166, 0.12);
}

.hero {
  padding: clamp(4rem, 8vw, 7.5rem) 0 clamp(3rem, 6vw, 6rem);
}

.hero-grid {
  display: grid;
  gap: 2rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: rgba(15, 118, 110, 0.12);
  color: var(--color-jade);
  font-weight: 600;
  padding: 0.45rem 1rem;
  border-radius: 999px;
  box-shadow: inset 0 0 0 1px rgba(15, 118, 110, 0.2);
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.3rem, 1.8rem + 2.4vw, 3.6rem);
  line-height: 1.1;
  margin: 1.25rem 0 1rem;
}

.hero p {
  font-size: clamp(1.05rem, 0.95rem + 0.6vw, 1.3rem);
  color: var(--color-text-muted);
  max-width: 36rem;
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.4rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.01em;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    background 0.2s ease;
  border: none;
  cursor: pointer;
}

.button-primary {
  background: linear-gradient(
    135deg,
    var(--color-jade),
    var(--color-turquoise)
  );
  color: #ffffff;
  box-shadow: 0 16px 30px -18px rgba(20, 184, 166, 0.9);
}

.button-secondary {
  background: rgba(11, 16, 32, 0.05);
  color: var(--color-night);
  box-shadow: inset 0 0 0 1px rgba(15, 23, 42, 0.1);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  background: rgba(11, 16, 32, 0.12);
  color: var(--color-jade);
}

.button-primary:hover,
.button-primary:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 22px 36px -18px rgba(20, 184, 166, 0.9);
}

.impact-badge {
  margin-top: 2.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.65rem 1.1rem;
  border-radius: var(--radius-sm);
  background: linear-gradient(
    120deg,
    rgba(15, 118, 110, 0.18),
    rgba(245, 158, 11, 0.18)
  );
  color: var(--color-night);
  font-weight: 600;
  box-shadow: inset 0 0 0 1px rgba(15, 118, 110, 0.25);
}

.section {
  padding: clamp(3rem, 5vw, 5rem) 0;
}

.section-header {
  display: grid;
  gap: 0.75rem;
  margin-bottom: clamp(2rem, 3vw, 3rem);
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 1.4rem + 1.5vw, 2.6rem);
  line-height: 1.2;
}

.section-subtitle {
  color: var(--color-text-muted);
  max-width: 36rem;
}

.steps {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.step-card {
  background: rgba(255, 255, 255, 0.8);
  border-radius: var(--radius-md);
  padding: 1.8rem;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
}

.step-card strong {
  display: inline-block;
  margin-bottom: 0.5rem;
  font-size: 1.05rem;
  color: var(--color-jade);
}

.step-card p {
  margin: 0;
  color: var(--color-text-muted);
}

.content-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.content-card {
  background: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius-lg);
  padding: 2rem;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
  display: grid;
  gap: 1rem;
}

.content-card h3 {
  margin: 0;
  font-size: 1.3rem;
  color: var(--color-night);
}

.content-card p {
  margin: 0;
  color: var(--color-text-muted);
}

.highlight {
  font-weight: 700;
  color: var(--color-gold);
}

footer {
  background: var(--color-night);
  color: #f1f5f9;
  padding: clamp(2.5rem, 4vw, 4rem) 0;
}

.footer-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

footer h2 {
  font-size: 1.2rem;
  margin-top: 0;
  margin-bottom: 1rem;
  font-family: var(--font-heading);
}

footer p {
  margin: 0;
  color: rgba(226, 232, 240, 0.85);
}

.social-links {
  display: flex;
  gap: 0.75rem;
}

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  color: #f8fafc;
  font-weight: 700;
  transition:
    background 0.2s ease,
    transform 0.2s ease;
}

.social-links a:hover,
.social-links a:focus-visible {
  background: rgba(20, 184, 166, 0.6);
  transform: translateY(-2px);
}

.footer-note {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: rgba(148, 163, 184, 0.9);
}

.transparency {
  margin-top: 1rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-gold);
}

@media (max-width: 768px) {
  nav ul {
    gap: 0.65rem;
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero {
    padding-top: 4.5rem;
  }

  .cta-group {
    width: 100%;
  }

  .button {
    flex: 1 1 240px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}