/* === RESET & BASE === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #08080b;
  --fg: #f2ede4;
  --fg-muted: rgba(242, 237, 228, 0.55);
  --fg-dim: rgba(242, 237, 228, 0.35);
  --accent: #b8963e;
  --accent-dim: rgba(184, 150, 62, 0.18);
  --border: rgba(242, 237, 228, 0.08);
  --section-pad: clamp(72px, 10vw, 120px);
  --container: 1100px;
  --text-sm: clamp(0.85rem, 1.1vw, 0.95rem);
  --text-base: clamp(1rem, 1.4vw, 1.1rem);
  --text-lg: clamp(1.2rem, 1.8vw, 1.4rem);
  --text-xl: clamp(1.5rem, 2.5vw, 2rem);
  --text-2xl: clamp(2rem, 4vw, 3.2rem);
  --text-3xl: clamp(2.8rem, 6vw, 5rem);
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans: 'DM Sans', system-ui, sans-serif;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--accent); color: var(--bg); }

/* === NAV === */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 20px 40px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  background: rgba(8, 8, 11, 0.85);
}

.nav-brand {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
}

/* === SECTION MARK === */
.section-mark {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.2rem;
  color: var(--accent);
  display: block;
  margin-bottom: 24px;
}

/* === HERO === */
.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 80px;
  padding: 120px clamp(32px, 6vw, 100px) 80px;
  max-width: var(--container);
  margin: 0 auto;
  position: relative;
}

.hero-label {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 28px;
}

.hero-headline {
  font-family: var(--font-serif);
  font-size: var(--text-3xl);
  font-weight: 400;
  line-height: 1.1;
  margin-bottom: 28px;
  letter-spacing: -0.02em;
}

.hero-sub {
  font-size: var(--text-base);
  color: var(--fg-muted);
  max-width: 460px;
  line-height: 1.7;
}

/* Hero visual */
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 420px;
}

.hero-circle {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 40%, rgba(184,150,62,0.15) 0%, transparent 70%);
  border: 1px solid rgba(184, 150, 62, 0.2);
  position: absolute;
}

.hero-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(184, 150, 62, 0.12);
}

.hero-ring-1 { width: 360px; height: 360px; }
.hero-ring-2 { width: 440px; height: 440px; }
.hero-ring-3 { width: 520px; height: 520px; }

.hero-core-text {
  font-family: var(--font-serif);
  font-size: 3rem;
  font-weight: 600;
  color: var(--accent);
  text-align: center;
  line-height: 1.1;
  z-index: 1;
}

.hero-core-text span {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-family: var(--font-sans);
}

/* === CEILING === */
.ceiling {
  padding: var(--section-pad) clamp(32px, 6vw, 100px);
  border-top: 1px solid var(--border);
}

.ceiling-inner { max-width: var(--container); margin: 0 auto; }

.ceiling-mark {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.2rem;
  color: var(--accent);
  margin-bottom: 20px;
}

.ceiling-title {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 400;
  margin-bottom: 36px;
  letter-spacing: -0.01em;
}

.ceiling-body {
  font-size: var(--text-lg);
  color: var(--fg-muted);
  max-width: 680px;
  margin-bottom: 20px;
  line-height: 1.75;
}

.ceiling-quote {
  font-style: italic;
  color: var(--fg);
  border-left: 2px solid var(--accent);
  padding-left: 24px;
  margin: 36px 0;
}

.ceiling-divider {
  display: flex;
  align-items: center;
  gap: 20px;
  margin: 48px 0;
  max-width: 680px;
}

.ceiling-divider-line {
  flex: 1;
  height: 1px;
  background: var(--accent);
  opacity: 0.3;
}

.ceiling-divider-text {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--text-base);
  color: var(--accent);
  white-space: nowrap;
}

.ceiling-final {
  font-size: var(--text-xl);
  color: var(--fg);
  font-weight: 500;
  max-width: 620px;
}

/* === WHAT IS === */
.what-is {
  padding: var(--section-pad) clamp(32px, 6vw, 100px);
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, var(--bg) 0%, rgba(184,150,62,0.03) 100%);
}

.what-is-inner { max-width: var(--container); margin: 0 auto; }

.what-is-mark {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.2rem;
  color: var(--accent);
  margin-bottom: 20px;
}

.what-is-title {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 400;
  margin-bottom: 48px;
  letter-spacing: -0.01em;
  max-width: 520px;
}

.what-is-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  max-width: 900px;
}

.what-is-col p {
  font-size: var(--text-base);
  color: var(--fg-muted);
  line-height: 1.8;
  margin-bottom: 16px;
}

.what-is-col-accent {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--accent) !important;
  font-size: var(--text-lg) !important;
  margin-top: 24px !important;
}

.what-is-col-rule {
  border-left: 1px solid var(--border);
  padding-left: 60px;
}

.what-is-col-rule p {
  font-size: var(--text-lg);
  color: var(--fg);
}

/* === DELTA === */
.delta {
  padding: var(--section-pad) clamp(32px, 6vw, 100px);
  border-top: 1px solid var(--border);
}

.delta-inner { max-width: var(--container); margin: 0 auto; }

.delta-mark {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.2rem;
  color: var(--accent);
  margin-bottom: 20px;
}

.delta-title {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 400;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.delta-intro {
  font-size: var(--text-base);
  color: var(--fg-muted);
  margin-bottom: 56px;
}

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

.delta-block {
  padding: 48px 48px 48px 0;
}

.delta-without {
  border-left: 1px solid var(--border);
  padding-left: 48px;
}

.delta-block-label {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 28px;
}

.delta-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.delta-list li {
  font-size: var(--text-sm);
  color: var(--fg-muted);
  line-height: 1.65;
  padding-left: 20px;
  position: relative;
}

.delta-with .delta-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--accent);
}

.delta-without .delta-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--fg-dim);
}

/* === SELECTOR === */
.selector {
  padding: var(--section-pad) clamp(32px, 6vw, 100px);
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(184,150,62,0.03) 0%, var(--bg) 100%);
}

.selector-inner { max-width: var(--container); margin: 0 auto; }

.selector-mark {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.2rem;
  color: var(--accent);
  margin-bottom: 20px;
}

.selector-title {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 400;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.selector-intro {
  font-size: var(--text-base);
  color: var(--fg-muted);
  margin-bottom: 56px;
}

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

.selector-col {
  padding: 48px 48px 48px 0;
}

.selector-col-not {
  border-left: 1px solid var(--border);
  padding-left: 48px;
}

.selector-col-label {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 28px;
}

.selector-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.selector-list li {
  font-size: var(--text-sm);
  color: var(--fg-muted);
  line-height: 1.65;
  padding-left: 20px;
  position: relative;
}

.selector-col-for .selector-list li::before {
  content: '+';
  position: absolute;
  left: 0;
  color: var(--accent);
}

.selector-col-not .selector-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--fg-dim);
}

/* === CLOSING === */
.closing {
  padding: var(--section-pad) clamp(32px, 6vw, 100px);
  border-top: 1px solid var(--border);
}

.closing-inner {
  max-width: var(--container);
  margin: 0 auto;
  text-align: center;
}

.closing-mark {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.2rem;
  color: var(--accent);
  margin-bottom: 20px;
}

.closing-eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-dim);
  margin-bottom: 32px;
}

.closing-headline {
  font-family: var(--font-serif);
  font-size: var(--text-3xl);
  font-weight: 400;
  letter-spacing: -0.02em;
  margin-bottom: 40px;
  line-height: 1.1;
}

.closing-body {
  font-size: var(--text-lg);
  color: var(--fg-muted);
  max-width: 640px;
  margin: 0 auto 20px;
  line-height: 1.75;
}

.closing-body-italic {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--text-xl);
  color: var(--fg);
  margin-top: 40px;
}

/* === FOOTER === */
.footer {
  padding: 64px clamp(32px, 6vw, 100px);
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-brand {
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
}

.footer-tagline {
  font-size: var(--text-sm);
  color: var(--fg-dim);
  font-style: italic;
  font-family: var(--font-serif);
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--fg-dim);
  letter-spacing: 0.1em;
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 100px;
    gap: 40px;
    text-align: center;
  }

  .hero-sub { margin: 0 auto 24px; }

  .hero-visual { height: 300px; }
  .hero-circle { width: 200px; height: 200px; }
  .hero-ring-1 { width: 260px; height: 260px; }
  .hero-ring-2 { width: 320px; height: 320px; }
  .hero-ring-3 { width: 380px; height: 380px; }
  .hero-core-text { font-size: 2.2rem; }

  .what-is-columns,
  .delta-grid,
  .selector-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .delta-block, .selector-col { padding: 0; border: none !important; }
  .delta-without, .selector-col-not { border-top: 1px solid var(--border)) !important; padding-left: 0; padding-top: 40px; }
  .what-is-col-rule { border-left: none; border-top: 1px solid var(--border); padding-left: 0; padding-top: 40px; }

  .ceiling-divider-text { display: none; }

  .footer-inner { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .nav { padding: 16px 24px; }
  .hero, .ceiling, .what-is, .delta, .selector, .closing, .footer { padding-left: 24px; padding-right: 24px; }
}