:root {
  --bg: #f6f0e7;
  --bg-soft: #efe3d2;
  --ink: #231b15;
  --muted: #6d5d50;
  --card: #fffaf2;
  --line: rgba(35, 27, 21, 0.14);
  --accent: #a8612a;
  --accent-dark: #704018;
  --green: #4f6f4f;
  --shadow: 0 24px 80px rgba(54, 32, 14, 0.16);
  --radius: 28px;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top left, #fff6e8 0, var(--bg) 38%, #ead7be 100%);
  line-height: 1.5;
}

a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; }

.skip-link {
  position: absolute;
  left: 1rem;
  top: -100px;
  z-index: 100;
  padding: 0.6rem 0.9rem;
  background: var(--ink);
  color: white;
  border-radius: 999px;
}
.skip-link:focus { top: 1rem; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 4vw, 3rem);
  background: rgba(246, 240, 231, 0.82);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}
.site-header[data-elevated="true"] {
  border-color: var(--line);
  box-shadow: 0 8px 28px rgba(39, 24, 12, 0.08);
}

.brand { display: flex; align-items: center; gap: 0.8rem; }
.brand-mark {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: white;
  font-weight: 900;
  letter-spacing: -0.04em;
}
.brand strong { display: block; line-height: 1.05; }
.brand small { display: block; color: var(--muted); font-size: 0.78rem; }

.site-nav { display: flex; align-items: center; gap: 1rem; font-size: 0.95rem; color: var(--muted); }
.site-nav a { padding: 0.55rem 0.25rem; }
.site-nav a:hover { color: var(--ink); }
.nav-cta { color: var(--accent-dark) !important; font-weight: 700; }
.nav-toggle { display: none; }

main { overflow: hidden; }
.section, .section-grid, .split-section, .signup-section {
  padding: clamp(4rem, 8vw, 7rem) clamp(1rem, 5vw, 4rem);
  max-width: 1220px;
  margin: 0 auto;
}
.section-grid, .split-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.85fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
}

.hero { min-height: calc(100vh - 76px); }
.eyebrow {
  color: var(--accent-dark);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  margin: 0 0 1rem;
}
h1, h2, h3, p { margin-top: 0; }
h1 { font-size: clamp(3rem, 7vw, 6.9rem); line-height: 0.92; letter-spacing: -0.075em; margin-bottom: 1.4rem; }
h2 { font-size: clamp(2rem, 4vw, 4rem); line-height: 1; letter-spacing: -0.055em; margin-bottom: 1rem; }
h3 { font-size: 1.25rem; letter-spacing: -0.02em; }
.hero-subtitle, .section-heading p, .copy-card p { color: var(--muted); font-size: clamp(1.05rem, 2vw, 1.25rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.85rem; margin: 2rem 0 1.25rem; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.85rem 1.2rem;
  border-radius: 999px;
  font-weight: 800;
  border: 1px solid var(--line);
  cursor: pointer;
}
.button.primary { background: var(--ink); color: white; border-color: var(--ink); }
.button.secondary { background: rgba(255,255,255,0.45); color: var(--ink); }
.button:hover { transform: translateY(-1px); }
.trust-list { display: flex; flex-wrap: wrap; gap: 0.55rem; padding: 0; margin: 0; list-style: none; }
.trust-list li {
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255,255,255,0.4);
  color: var(--muted);
  font-size: 0.92rem;
}

.hero-card, .copy-card, .signup-card, .feature-card, .timeline article {
  background: rgba(255, 250, 242, 0.76);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.hero-card { padding: 1.1rem; transform: rotate(1deg); }
.sheet-preview { background: #2d241d; border-radius: 22px; padding: 1rem; color: white; }
.sheet-toolbar { display: flex; justify-content: space-between; color: #ead7be; font-size: 0.85rem; margin-bottom: 0.8rem; }
.sheet-canvas {
  position: relative;
  aspect-ratio: 1 / 1.55;
  background: linear-gradient(90deg, rgba(255,255,255,0.06) 1px, transparent 1px), linear-gradient(rgba(255,255,255,0.06) 1px, transparent 1px), #b98250;
  background-size: 12.5% 8.333%;
  border-radius: 14px;
  overflow: hidden;
}
.part, .waste {
  position: absolute;
  display: grid;
  place-items: center;
  border: 2px solid rgba(255,255,255,0.76);
  border-radius: 10px;
  font-size: 0.72rem;
  font-weight: 800;
  text-align: center;
}
.part { background: rgba(255, 248, 226, 0.34); }
.waste { background: rgba(35, 27, 21, 0.34); color: rgba(255,255,255,0.72); border-style: dashed; }
.p1 { left: 7%; top: 7%; width: 38%; height: 22%; }
.p2 { left: 50%; top: 7%; width: 38%; height: 22%; }
.p3 { left: 7%; top: 35%; width: 30%; height: 18%; }
.p4 { left: 7%; top: 59%; width: 78%; height: 12%; }
.waste { left: 42%; top: 35%; width: 46%; height: 18%; }
.metric-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.7rem; margin-top: 0.9rem; }
.metric-row div { padding: 0.9rem; border-radius: 18px; background: rgba(255,255,255,0.56); }
.metric-row strong, .metric-row span { display: block; }
.metric-row span { color: var(--muted); font-size: 0.83rem; }

.section-heading { max-width: 760px; margin-bottom: 2rem; }
.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.feature-card { padding: 1.5rem; box-shadow: none; }
.feature-card p { color: var(--muted); margin-bottom: 0; }
.copy-card { padding: clamp(1.3rem, 3vw, 2rem); }
.check-list { padding: 0; margin: 1.2rem 0 0; list-style: none; }
.check-list li { padding-left: 1.6rem; position: relative; margin: 0.6rem 0; color: var(--muted); }
.check-list li::before { content: "✓"; position: absolute; left: 0; color: var(--green); font-weight: 900; }
.muted { max-width: none; background: rgba(255,255,255,0.25); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.timeline { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1rem; max-width: 1220px; margin: 0 auto; }
.timeline article { padding: 1.35rem; box-shadow: none; }
.timeline span { color: var(--accent); font-weight: 900; font-size: 0.85rem; }
.timeline p { color: var(--muted); margin-bottom: 0; }
.small-note, .form-note { color: var(--muted); font-size: 0.92rem !important; }
.signup-section { padding-top: 2rem; }
.signup-card { max-width: 820px; margin: 0 auto; padding: clamp(1.5rem, 4vw, 3rem); }
.signup-form label { display: block; font-weight: 800; margin: 1.2rem 0 0.45rem; }
.form-row { display: flex; gap: 0.7rem; }
input[type="email"] {
  flex: 1;
  min-height: 52px;
  padding: 0 1rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: white;
  font: inherit;
}
.site-footer { padding: 2rem clamp(1rem, 5vw, 4rem); display: flex; justify-content: space-between; gap: 1rem; color: var(--muted); border-top: 1px solid var(--line); }
.site-footer p { margin: 0; }

@media (max-width: 900px) {
  .section-grid, .split-section { grid-template-columns: 1fr; }
  .hero { min-height: auto; }
  .hero-card { transform: none; }
  .feature-grid, .timeline { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .site-nav {
    position: absolute;
    top: 100%;
    left: 1rem;
    right: 1rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 1rem;
    border-radius: 20px;
    background: var(--card);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
  }
  .site-nav[data-open="true"] { display: flex; }
  .nav-toggle { display: inline-flex; border: 1px solid var(--line); background: rgba(255,255,255,0.5); border-radius: 999px; padding: 0.6rem 0.9rem; font-weight: 800; }
}
@media (max-width: 620px) {
  h1 { font-size: 3.25rem; }
  .feature-grid, .timeline, .metric-row { grid-template-columns: 1fr; }
  .form-row { flex-direction: column; }
  .site-footer { flex-direction: column; }
}