/* ==========================================
   StockAI — Landing Page Stylesheet
   ========================================== */

/* --- Tokens --- */
:root {
  --bg: #f7f3ee;
  --bg-alt: #eee9e0;
  --fg: #1c1c1c;
  --fg-muted: #6b6560;
  --accent: #d4a853;
  --accent-dark: #b8893a;
  --green: #14291a;
  --green-mid: #1e3d26;
  --green-light: #2d5a38;
  --cream: #faf7f2;
  --border: #ddd8cf;
  --alert: #c94a3a;
  --warn: #d4883a;
  --ok: #3a8c5c;
  --radius: 6px;
  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  overflow-x: hidden;
}

/* --- Nav --- */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 3rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(247, 243, 238, 0.92);
  backdrop-filter: blur(12px);
  z-index: 100;
}

.nav__brand { display: flex; align-items: baseline; gap: 0.75rem; }
.nav__logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--green);
  letter-spacing: -0.02em;
}
.nav__tagline {
  font-size: 0.8rem;
  color: var(--fg-muted);
  font-weight: 400;
}
.nav__status {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--fg-muted);
}
.nav__dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--ok);
  display: inline-block;
  box-shadow: 0 0 0 3px rgba(58,140,92,0.2);
  animation: pulse 2.5s infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(58,140,92,0.2); }
  50% { box-shadow: 0 0 0 6px rgba(58,140,92,0.05); }
}

/* --- Section Utilities --- */
.section__eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-dark);
  margin-bottom: 0.75rem;
}
.section__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.1;
  color: var(--green);
  letter-spacing: -0.02em;
  margin-bottom: 2rem;
}
.section__title em { font-style: italic; color: var(--accent-dark); }

/* --- Hero --- */
.hero {
  padding: 5rem 3rem 4rem;
  max-width: 1400px;
  margin: 0 auto;
}
.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.hero__eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-dark);
  margin-bottom: 1rem;
}
.hero__headline {
  font-family: var(--font-display);
  font-size: clamp(3rem, 5.5vw, 4.5rem);
  line-height: 1.05;
  color: var(--green);
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}
.hero__headline em { font-style: italic; color: var(--accent-dark); }
.hero__sub {
  font-size: 1.1rem;
  color: var(--fg-muted);
  line-height: 1.65;
  max-width: 480px;
  margin-bottom: 2.5rem;
}
.hero__signal {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.signal__item { display: flex; flex-direction: column; }
.signal__value {
  font-family: var(--font-display);
  font-size: 1.8rem;
  color: var(--green);
  line-height: 1;
}
.signal__label { font-size: 0.75rem; color: var(--fg-muted); margin-top: 0.25rem; }
.signal__divider {
  width: 1px; height: 40px;
  background: var(--border);
}

/* --- Inventory Visualization --- */
.inventory-viz {
  background: var(--green);
  border-radius: 12px;
  padding: 1.5rem;
  color: var(--cream);
  font-family: 'DM Mono', 'Courier New', monospace;
  font-size: 0.78rem;
  box-shadow: 0 20px 60px rgba(20,41,26,0.25);
}
.viz__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
}
.viz__title { color: rgba(250,247,242,0.6); font-size: 0.72rem; }
.viz__badge {
  background: rgba(58,140,92,0.25);
  color: #6fcf9a;
  border: 1px solid rgba(111,207,154,0.3);
  padding: 2px 8px;
  border-radius: 20px;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.05em;
}
.viz__grid { display: flex; flex-direction: column; gap: 0.6rem; margin-bottom: 1.25rem; }
.sku-row { display: grid; grid-template-columns: 140px 1fr 40px; gap: 0.75rem; align-items: center; }
.sku-name { color: rgba(250,247,242,0.7); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sku-bar { background: rgba(255,255,255,0.1); border-radius: 4px; height: 6px; overflow: hidden; }
.sku-bar__fill { height: 100%; border-radius: 4px; transition: width 0.5s ease; }
.sku-status { font-weight: 600; text-align: right; }
.sku-status--ok { color: #6fcf9a; }
.sku-status--warn { color: var(--warn); }
.sku-status--alert { color: #e06c5a; }
.sku-bar__fill { background: #6fcf9a; }
.sku-row:nth-child(2) .sku-bar__fill { background: var(--warn); }
.sku-row:nth-child(3) .sku-bar__fill { background: #e06c5a; }
.sku-row:nth-child(4) .sku-bar__fill { background: #6fcf9a; }
.sku-row:nth-child(5) .sku-bar__fill { background: #e06c5a; }

.viz__alert {
  background: rgba(224, 108, 90, 0.15);
  border: 1px solid rgba(224, 108, 90, 0.3);
  border-radius: 6px;
  padding: 0.6rem 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  color: #e06c5a;
}
.alert__icon {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: #e06c5a;
  display: inline-block;
  flex-shrink: 0;
}
.alert__text { font-size: 0.72rem; color: rgba(250,247,242,0.8); }

.viz__log { border-top: 1px solid rgba(255,255,255,0.08); padding-top: 0.75rem; display: flex; flex-direction: column; gap: 0.3rem; }
.log__entry { color: rgba(250,247,242,0.45); font-size: 0.68rem; }
.log__entry--reorder { color: rgba(111,207,154,0.7); }
.log__entry--alert { color: rgba(212,136,58,0.8); }
.log__entry--ok { color: rgba(250,247,242,0.3); }

/* --- Manifesto --- */
.manifesto {
  background: var(--green);
  color: var(--cream);
  padding: 7rem 3rem;
}
.manifesto__inner { max-width: 860px; margin: 0 auto; }
.manifesto__quote {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-style: italic;
  line-height: 1.3;
  color: var(--cream);
  margin-bottom: 2.5rem;
  letter-spacing: -0.01em;
}
.manifesto__body { display: flex; flex-direction: column; gap: 1.25rem; }
.manifesto__body p { color: rgba(250,247,242,0.65); font-size: 1.05rem; line-height: 1.7; }

/* --- Mechanics --- */
.mechanics { padding: 7rem 3rem; max-width: 1200px; margin: 0 auto; }
.mechanics__header { margin-bottom: 3rem; }
.mechanics__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; }
.mech-card {
  padding: 2rem 1.5rem;
  background: var(--cream);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.mech-card:hover { transform: translateY(-3px); box-shadow: 0 12px 32px rgba(20,41,26,0.1); }
.mech-card__icon { color: var(--accent-dark); margin-bottom: 1.25rem; }
.mech-card__title { font-weight: 600; font-size: 1rem; color: var(--green); margin-bottom: 0.75rem; }
.mech-card__desc { font-size: 0.9rem; color: var(--fg-muted); line-height: 1.6; }

/* --- Outcomes --- */
.outcomes { background: var(--bg-alt); padding: 7rem 3rem; }
.outcomes__inner { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1fr; gap: 5rem; align-items: center; }
.outcomes__body { color: var(--fg-muted); font-size: 1rem; line-height: 1.7; margin-bottom: 2.5rem; }

.outcomes__comparison { display: flex; flex-direction: column; gap: 0; }
.comparison {
  padding: 1rem 1.25rem;
  border-left: 3px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 0.5rem;
}
.comparison--ai { border-left-color: var(--ok); background: rgba(58,140,92,0.06); border-radius: 0 6px 6px 0; }
.comparison__label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 0.25rem;
}
.comparison__item { font-size: 0.85rem; color: var(--fg-muted); }
.comparison--ai .comparison__item { color: var(--green-mid); }
.comparison__item--result { font-weight: 600; }
.comparison:not(.comparison--ai) .comparison__item--result { color: var(--alert); }
.comparison--ai .comparison__item--result { color: var(--ok); }

.stats-block { display: flex; flex-direction: column; gap: 2rem; }
.stat {}
.stat__number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  color: var(--green);
  line-height: 1;
  display: block;
}
.stat__unit { font-size: 1.2rem; }
.stat__desc { font-size: 0.85rem; color: var(--fg-muted); margin-top: 0.35rem; display: block; }

/* --- Closing --- */
.closing {
  padding: 7rem 3rem;
  text-align: center;
  background: var(--green);
  color: var(--cream);
}
.closing__inner { max-width: 700px; margin: 0 auto; }
.closing__label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(250,247,242,0.4);
  margin-bottom: 1.5rem;
}
.closing__headline {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}
.closing__headline em { font-style: italic; color: var(--accent); }
.closing__sub { font-size: 1.05rem; color: rgba(250,247,242,0.6); margin-bottom: 2.5rem; line-height: 1.65; }
.closing__features {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: rgba(250,247,242,0.5);
}
.dot { width: 4px; height: 4px; border-radius: 50%; background: rgba(250,247,242,0.2); }

/* --- Footer --- */
.footer {
  padding: 2.5rem 3rem;
  border-top: 1px solid var(--border);
}
.footer__inner { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: flex-end; }
.footer__logo { font-family: var(--font-display); font-size: 1.25rem; color: var(--green); margin-bottom: 0.5rem; }
.footer__tagline { font-size: 0.85rem; color: var(--fg-muted); line-height: 1.5; }
.footer__copy { font-size: 0.8rem; color: var(--fg-muted); }
.footer__links { display: flex; gap: 1.5rem; margin-top: 0.5rem; }
.footer__links span { font-size: 0.8rem; color: var(--fg-muted); cursor: pointer; }

/* --- Responsive --- */
@media (max-width: 1024px) {
  .mechanics__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
  .hero__inner { grid-template-columns: 1fr; gap: 3rem; }
  .hero__right { order: -1; }
  .outcomes__inner { grid-template-columns: 1fr; gap: 3rem; }
  .nav { padding: 1rem 1.5rem; }
  .hero, .mechanics, .manifesto, .outcomes, .closing { padding-left: 1.5rem; padding-right: 1.5rem; }
}
@media (max-width: 600px) {
  .mechanics__grid { grid-template-columns: 1fr; }
  .hero__signal { flex-direction: column; align-items: flex-start; gap: 1rem; }
  .signal__divider { display: none; }
  .nav__tagline { display: none; }
  .footer__inner { flex-direction: column; gap: 1.5rem; }
  .sku-row { grid-template-columns: 100px 1fr 35px; }
}