/* ============================================
   BOOKEDAI — Design System
   ============================================ */

:root {
  --ivory: #faf8f4;
  --cream: #f0ebe1;
  --forest: #1a3c34;
  --forest-light: #254a43;
  --brass: #b8963e;
  --brass-light: #d4b05a;
  --charcoal: #1c1c1a;
  --mid: #6b6b63;
  --light: #e8e4db;

  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
}

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

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

body {
  background: var(--ivory);
  color: var(--charcoal);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* — NAV — */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.75rem 4rem;
  border-bottom: 1px solid var(--light);
}

.nav__logo {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--forest);
  letter-spacing: -0.02em;
}

.nav__tag {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mid);
  font-weight: 500;
}

/* — HERO — */
.hero {
  padding: 6rem 4rem 4rem;
  border-bottom: 1px solid var(--light);
}

.hero__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  margin-bottom: 4rem;
}

.hero__headline {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 6vw, 5.5rem);
  font-weight: 400;
  line-height: 1.05;
  color: var(--forest);
  letter-spacing: -0.03em;
}

.hero__right {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding-bottom: 0.5rem;
}

.hero__sub {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.25rem;
  color: var(--forest);
  line-height: 1.5;
  margin-bottom: 1.5rem;
  border-left: 3px solid var(--brass);
  padding-left: 1.25rem;
}

.hero__body {
  font-size: 1.05rem;
  color: var(--mid);
  line-height: 1.7;
}

.hero__stat-row {
  display: flex;
  gap: 0;
  margin-top: 2rem;
}

.hero__stat {
  flex: 1;
  padding: 2rem 2.5rem;
  border-right: 1px solid var(--light);
}

.hero__stat:last-child {
  border-right: none;
}

.hero__stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--forest);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.hero__stat-label {
  font-size: 0.8rem;
  color: var(--mid);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  line-height: 1.4;
}

/* — PROOF / HOW IT WORKS — */
.proof {
  padding: 5rem 4rem;
  background: var(--forest);
  color: var(--ivory);
}

.proof__inner {
  max-width: 900px;
}

.proof__badge {
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--brass-light);
  margin-bottom: 2.5rem;
  font-weight: 500;
}

.proof__steps {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.proof__step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 2rem;
  padding: 2.5rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  align-items: start;
}

.proof__step:last-child {
  border-bottom: none;
}

.proof__step-num {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 400;
  color: var(--brass);
  line-height: 1;
  opacity: 0.7;
}

.proof__step-content h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 400;
  margin-bottom: 0.75rem;
  color: var(--ivory);
}

.proof__step-content p {
  font-size: 0.95rem;
  color: rgba(250,248,244,0.65);
  line-height: 1.7;
  max-width: 560px;
}

/* — WHO THIS IS FOR — */
.what {
  padding: 6rem 4rem;
  background: var(--cream);
}

.what__inner {
  max-width: 1000px;
}

.what__headline {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 400;
  color: var(--forest);
  margin-bottom: 3rem;
  letter-spacing: -0.02em;
}

.what__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}

.what__card {
  padding: 2.5rem 2rem;
  border-right: 1px solid var(--light);
  border-bottom: 1px solid var(--light);
}

.what__card:nth-child(2n) {
  border-right: none;
}

.what__card:nth-child(3),
.what__card:nth-child(4) {
  border-bottom: none;
}

.what__card-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  color: var(--brass);
}

.what__card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--forest);
  margin-bottom: 0.75rem;
}

.what__card p {
  font-size: 0.9rem;
  color: var(--mid);
  line-height: 1.65;
}

/* — MANIFESTO — */
.manifesto {
  padding: 6rem 4rem;
  background: var(--ivory);
}

.manifesto__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  max-width: 1100px;
}

.manifesto__eyebrow {
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--brass);
  margin-bottom: 1.5rem;
  font-weight: 500;
}

.manifesto__headline {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3vw, 2.75rem);
  font-weight: 400;
  color: var(--forest);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.manifesto__right p {
  font-size: 1rem;
  color: var(--mid);
  line-height: 1.75;
  margin-bottom: 1.25rem;
}

.manifesto__right p:last-child {
  margin-bottom: 0;
}

/* — CLOSING — */
.closing {
  padding: 7rem 4rem;
  background: var(--forest);
  text-align: center;
}

.closing__inner {
  max-width: 800px;
  margin: 0 auto;
}

.closing__headline {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 2.5vw, 2.25rem);
  font-weight: 400;
  color: var(--ivory);
  line-height: 1.35;
  letter-spacing: -0.01em;
  margin-bottom: 1.5rem;
}

.closing__cta {
  display: inline-block;
  margin-top: 2rem;
  padding: 0.9rem 2.25rem;
  background: var(--brass);
  color: var(--ivory);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  transition: background 0.2s;
  border: none;
}

.closing__cta:hover {
  background: var(--brass-light);
}

.closing__sub {
  font-size: 0.9rem;
  color: rgba(250,248,244,0.5);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-weight: 400;
}

/* — FOOTER — */
.footer {
  padding: 3rem 4rem;
  border-top: 1px solid var(--light);
  background: var(--ivory);
}

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

.footer__logo {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--forest);
  margin-bottom: 0.35rem;
}

.footer__tagline {
  font-size: 0.8rem;
  color: var(--mid);
}

.footer__meta p {
  font-size: 0.8rem;
  color: var(--mid);
  text-align: right;
}

/* — MOBILE — */
@media (max-width: 768px) {
  .nav { padding: 1.25rem 1.5rem; }
  .hero { padding: 3rem 1.5rem 2.5rem; }
  .hero__content { grid-template-columns: 1fr; gap: 1.5rem; }
  .hero__headline { font-size: 3rem; }
  .hero__right { padding-bottom: 0; }
  .hero__stat-row { flex-direction: column; }
  .hero__stat { border-right: none; border-bottom: 1px solid var(--light); padding: 1.5rem 0; }
  .hero__stat:last-child { border-bottom: none; }
  .proof { padding: 3.5rem 1.5rem; }
  .proof__step { grid-template-columns: 48px 1fr; gap: 1rem; }
  .proof__step-num { font-size: 2.5rem; }
  .what { padding: 3.5rem 1.5rem; }
  .what__grid { grid-template-columns: 1fr; }
  .what__card { border-right: none; }
  .what__card:nth-child(3) { border-bottom: 1px solid var(--light); }
  .manifesto { padding: 3.5rem 1.5rem; }
  .manifesto__inner { grid-template-columns: 1fr; gap: 2rem; }
  .closing { padding: 4rem 1.5rem; }
  .footer { padding: 2rem 1.5rem; }
  .footer__inner { flex-direction: column; gap: 1rem; align-items: flex-start; }
  .footer__meta p { text-align: left; }
}

@media (max-width: 480px) {
  .nav { padding: 1rem 1.25rem; }
  .hero { padding: 2.5rem 1.25rem 2rem; }
  .hero__headline { font-size: 2.5rem; }
  .hero__sub { font-size: 1.05rem; }
  .hero__stat-num { font-size: 2rem; }
}