*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --black: #111;
  --grey: #555;
  --light: #f5f5f3;
  --white: #fff;
  --accent: #e07b39;
  --border: #e0e0e0;
  --max: 680px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--black);
  background: var(--white);
}

a { color: inherit; }

/* ── Layout ── */
.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

section { padding: 5rem 0; }
section + section { border-top: 1px solid var(--border); }

/* ── Nav ── */
nav {
  position: sticky;
  top: 0;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  z-index: 10;
  padding: 1rem 0;
}

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

.nav-logo {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--black);
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--grey);
  text-decoration: none;
  transition: color 0.15s;
}

.nav-links a:hover { color: var(--black); }

/* ── Hero ── */
#hero {
  padding: 7rem 0 6rem;
  border-top: none;
}

.hero-eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

h1 {
  font-size: clamp(2.8rem, 7vw, 4.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.hero-sub {
  font-size: 1.125rem;
  color: var(--grey);
  max-width: 500px;
  margin-bottom: 2.5rem;
}

.btn {
  display: inline-block;
  padding: 0.85rem 2rem;
  border-radius: 4px;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: opacity 0.15s, transform 0.15s;
}

.btn:hover { opacity: 0.85; transform: translateY(-1px); }

.btn-primary {
  background: var(--accent);
  color: var(--white);
}

.btn-secondary {
  background: transparent;
  color: var(--black);
  border: 1.5px solid var(--black);
  margin-left: 0.75rem;
}

/* ── Stats bar ── */
.stats {
  display: flex;
  gap: 3rem;
  padding: 3rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--grey);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 0.35rem;
}

/* ── Section headings ── */
h2 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
}

.section-intro {
  font-size: 1.05rem;
  color: var(--grey);
  margin-bottom: 2.5rem;
}

/* ── Walkers ── */
.walkers {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.walker {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--border);
  border-radius: 6px;
}

.walker-photo {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.walker-name {
  font-size: 1.1rem;
  font-weight: 600;
}

/* ── Donate ── */
.donate-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.donate-card {
  padding: 1.75rem;
  border: 1.5px solid var(--border);
  border-radius: 6px;
}

.donate-card.featured {
  border-color: var(--accent);
}

.donate-card-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.donate-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.donate-card p {
  font-size: 0.9rem;
  color: var(--grey);
}

.donate-cta {
  background: var(--light);
  border-radius: 6px;
  padding: 2rem;
  text-align: center;
}

.donate-cta p {
  font-size: 0.95rem;
  color: var(--grey);
  margin-bottom: 1.25rem;
}

/* ── Footer ── */
footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
  font-size: 0.85rem;
  color: var(--grey);
}

footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* ── Responsive ── */
@media (max-width: 540px) {
  .stats { gap: 1.75rem; flex-wrap: wrap; }
  .donate-options { grid-template-columns: 1fr; }
  .btn-secondary { margin-left: 0; margin-top: 0.75rem; }
  nav .container { flex-direction: column; gap: 0.75rem; }
  .nav-links { gap: 1.25rem; }
}