/* ============================================================
   vlvt — brand system, red plush.
   Tokens mirror the vlvt pre-seed deck brand system.
   ============================================================ */

:root {
  /* ---- type scale ---- */
  --text-xs:   clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl:  clamp(2.5rem, 1rem + 4vw, 5rem);
  --text-hero: clamp(3rem, 0.5rem + 7vw, 8rem);

  /* ---- spacing ---- */
  --space-1: 0.25rem;  --space-2: 0.5rem;   --space-3: 0.75rem;
  --space-4: 1rem;     --space-5: 1.25rem;  --space-6: 1.5rem;
  --space-8: 2rem;     --space-10: 2.5rem;  --space-12: 3rem;
  --space-16: 4rem;    --space-20: 5rem;    --space-24: 6rem;
  --space-32: 8rem;

  /* ---- radius, motion ---- */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.625rem;
  --radius-full: 9999px;
  --transition-interactive: 220ms cubic-bezier(0.16, 1, 0.3, 1);

  /* ---- content widths ---- */
  --content-narrow: 680px;
  --content-default: 1000px;
  --content-wide: 1220px;

  /* ---- type families ---- */
  --font-display: 'Instrument Serif', 'Iowan Old Style', Georgia, serif;
  --font-body: 'Switzer', 'Helvetica Neue', system-ui, sans-serif;
}

/* ---------------- light, ivory and oxblood ---------------- */
:root,
[data-theme='light'] {
  --color-bg:               #FAF4F1;
  --color-surface:          #F4E9E3;
  --color-surface-2:        #EFE0D9;
  --color-surface-offset:   #E9D6CE;
  --color-divider:          #E0CCC4;
  --color-border:           #D3B8AF;
  --color-text:             #24090F;
  --color-text-muted:       #63404A;
  --color-text-faint:       #8A6A72;
  --color-text-inverse:     #FAF4F1;
  --color-primary:          #7E1226;
  --color-primary-fill:     #7E1226;
  --color-primary-hover:    #5A0F1D;
  --color-oxblood:          #5A0F1D;
  --shadow-md: 0 4px 16px rgba(60, 16, 26, 0.10);
  --shadow-lg: 0 16px 40px rgba(60, 16, 26, 0.16);
  --hero-scrim: linear-gradient(
    100deg,
    rgba(20, 7, 11, 0.94) 0%,
    rgba(20, 7, 11, 0.84) 34%,
    rgba(20, 7, 11, 0.46) 62%,
    rgba(20, 7, 11, 0.2) 100%
  );
}

/* ---------------- dark, the primary brand mode ---------------- */
[data-theme='dark'] {
  --color-bg:               #16080C;  /* dark cherry */
  --color-surface:          #2A0D14;  /* deep wine */
  --color-surface-2:        #331019;  /* raised wine */
  --color-surface-offset:   #3D131E;
  --color-divider:          #3A1220;
  --color-border:           #4A1622;  /* quiet rule */
  --color-text:             #F4E9E3;  /* ivory */
  --color-text-muted:       #E5CFCE;  /* blush */
  --color-text-faint:       #C7A9A8;
  --color-text-inverse:     #16080C;
  --color-primary:          #C4485F;  /* legible crimson for text links */
  --color-primary-fill:     #8E1B31;  /* active crimson, fills */
  --color-primary-hover:    #D9697D;
  --color-oxblood:          #5A0F1D;
  --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.6);
  --hero-scrim: linear-gradient(
    100deg,
    rgba(22, 8, 12, 0.96) 0%,
    rgba(22, 8, 12, 0.88) 34%,
    rgba(22, 8, 12, 0.5) 62%,
    rgba(22, 8, 12, 0.24) 100%
  );
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #16080C;
    --color-surface: #2A0D14;
    --color-surface-2: #331019;
    --color-surface-offset: #3D131E;
    --color-divider: #3A1220;
    --color-border: #4A1622;
    --color-text: #F4E9E3;
    --color-text-muted: #E5CFCE;
    --color-text-faint: #C7A9A8;
    --color-text-inverse: #16080C;
    --color-primary: #C4485F;
    --color-primary-fill: #8E1B31;
    --color-primary-hover: #D9697D;
  }
}

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

html {
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-20);
}

body {
  min-height: 100dvh;
  line-height: 1.62;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}

img, picture, svg { display: block; max-width: 100%; height: auto; }
ul[role='list'], ol[role='list'] { list-style: none; }
button { cursor: pointer; background: none; border: none; }
input, button, textarea, select { font: inherit; color: inherit; }

h1, h2, h3, h4 { text-wrap: balance; line-height: 1.12; font-weight: 400; }
p, li, figcaption, dd { text-wrap: pretty; max-width: 68ch; }

a { color: var(--color-primary); text-decoration-thickness: 1px; text-underline-offset: 0.22em; }
a:hover { color: var(--color-primary-hover); }

a, button, [role='button'] {
  transition: color var(--transition-interactive),
              background var(--transition-interactive),
              border-color var(--transition-interactive),
              transform var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

::selection { background: var(--color-primary-fill); color: #F4E9E3; }

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border-width: 0;
}

.skip-link {
  position: absolute; left: var(--space-4); top: var(--space-2);
  transform: translateY(-160%);
  background: var(--color-surface); color: var(--color-text);
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-border); border-radius: var(--radius-md);
  z-index: 100; font-size: var(--text-sm); text-decoration: none;
}
.skip-link:focus-visible { transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ========================== primitives ========================== */
.shell {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-5), 5vw, var(--space-12));
}
.shell--narrow { max-width: var(--content-narrow); }
.shell--default { max-width: var(--content-default); }

.section { padding-block: clamp(var(--space-16), 9vw, var(--space-32)); }
.section--tight { padding-block: clamp(var(--space-12), 6vw, var(--space-20)); }
.section--wine { background: var(--color-surface); }

.eyebrow {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-5);
}
[data-theme='dark'] .eyebrow { color: #D9697D; }

.h-section {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  letter-spacing: -0.015em;
  max-width: 22ch;
}
.h-sub {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  letter-spacing: -0.01em;
}
.lede {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  margin-top: var(--space-6);
  max-width: 56ch;
}
.rule { height: 1px; background: var(--color-border); border: 0; }

.btn {
  display: inline-flex; align-items: center; gap: var(--space-3);
  font-size: var(--text-sm); font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  text-decoration: none;
}
.btn--primary {
  background: var(--color-primary-fill);
  color: #F4E9E3;
  box-shadow: var(--shadow-md);
}
.btn--primary:hover {
  background: var(--color-primary-hover);
  color: #FFF8F5;
  transform: translateY(-2px);
}
[data-theme='dark'] .btn--primary:hover { color: #16080C; }
.btn--ghost {
  border: 1px solid rgba(244, 233, 227, 0.34);
  color: #F4E9E3;
}
.btn--ghost:hover {
  border-color: #F4E9E3;
  color: #F4E9E3;
  transform: translateY(-2px);
}

/* =========================== masthead =========================== */
.masthead {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-divider);
}
.masthead__inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-6);
  padding-block: var(--space-4);
}
.brand {
  display: inline-flex; align-items: center; gap: var(--space-3);
  color: var(--color-text); text-decoration: none;
}
.brand__mark { width: 26px; height: 26px; color: var(--color-primary-fill); flex: none; }
[data-theme='dark'] .brand__mark { color: #C4485F; }
.brand__word {
  font-family: var(--font-display);
  font-size: 1.5rem; line-height: 1;
  letter-spacing: 0.06em;
}
.nav { display: flex; align-items: center; gap: clamp(var(--space-4), 2.4vw, var(--space-8)); }
.nav a {
  font-size: var(--text-sm); color: var(--color-text-muted);
  text-decoration: none; letter-spacing: 0.02em;
}
.nav a:hover { color: var(--color-text); }
.nav__hide { display: none; }
@media (min-width: 760px) { .nav__hide { display: inline; } }
@media (max-width: 400px) {
  .nav { gap: var(--space-4); }
  .nav a { font-size: 0.85rem; }
}
@media (max-width: 340px) { .nav a { display: none; } }

.theme-toggle {
  display: grid; place-items: center;
  width: 38px; height: 38px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
}
.theme-toggle:hover { color: var(--color-text); border-color: var(--color-text-faint); }

/* ============================= hero ============================= */
.hero { position: relative; isolation: isolate; overflow: hidden; background: #16080C; }
.hero__media {
  position: absolute; inset: 0; z-index: -2;
  width: 100%; height: 100%; object-fit: cover; object-position: 68% 50%;
}
.hero::after {
  content: ''; position: absolute; inset: 0; z-index: -1;
  background: var(--hero-scrim);
}
.hero__inner {
  min-height: min(88svh, 780px);
  display: flex; flex-direction: column; justify-content: flex-end;
  padding-block: clamp(var(--space-20), 12vw, var(--space-32)) clamp(var(--space-12), 7vw, var(--space-20));
}
.hero__word {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  line-height: 0.86;
  letter-spacing: -0.02em;
  color: #F4E9E3;
}
.hero__claim {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: #F4E9E3;
  margin-top: var(--space-6);
  max-width: 26ch;
}
.hero__sub {
  font-size: var(--text-base);
  color: #E5CFCE;
  margin-top: var(--space-5);
  max-width: 46ch;
}
.hero__actions {
  display: flex; flex-wrap: wrap; gap: var(--space-4);
  margin-top: var(--space-10);
}
.hero__meta {
  display: flex; flex-wrap: wrap; gap: var(--space-6);
  margin-top: clamp(var(--space-10), 6vw, var(--space-16));
  padding-top: var(--space-6);
  border-top: 1px solid rgba(244, 233, 227, 0.2);
  font-size: var(--text-xs);
  letter-spacing: 0.18em; text-transform: uppercase;
  color: #C7A9A8;
}

/* ============================ burden ============================ */
.burden__grid {
  display: grid; gap: var(--space-8);
  margin-top: clamp(var(--space-10), 5vw, var(--space-16));
  grid-template-columns: 1fr;
}
@media (min-width: 720px) { .burden__grid { grid-template-columns: 1fr 1fr; } }
.burden__item { border-top: 1px solid var(--color-border); padding-top: var(--space-5); }
.burden__item h3 { font-size: var(--text-lg); font-family: var(--font-body); font-weight: 600; }
.burden__item p { margin-top: var(--space-3); color: var(--color-text-muted); font-size: var(--text-sm); }

/* ============================ layers ============================ */
.layers {
  display: grid; gap: var(--space-6);
  margin-top: clamp(var(--space-10), 5vw, var(--space-16));
  grid-template-columns: 1fr;
}
@media (min-width: 900px) { .layers { grid-template-columns: repeat(3, 1fr); } }
.layer {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-6);
  display: flex; flex-direction: column; gap: var(--space-4);
}
.layer__num {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-primary);
  line-height: 1;
}
[data-theme='dark'] .layer__num { color: #D9697D; }
.layer h3 { font-size: var(--text-lg); font-family: var(--font-body); font-weight: 600; }
.layer p { color: var(--color-text-muted); font-size: var(--text-sm); }

/* ============================ figure ============================ */
.plate { margin-top: clamp(var(--space-12), 6vw, var(--space-20)); }
.plate img {
  width: 100%;
  border-radius: var(--radius-lg);
  aspect-ratio: 21 / 9; object-fit: cover;
}
.plate figcaption {
  margin-top: var(--space-4);
  font-size: var(--text-xs);
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--color-text-faint);
}

/* ============================= rail ============================= */
.rail {
  display: flex; flex-wrap: wrap; gap: var(--space-3);
  margin-top: clamp(var(--space-10), 5vw, var(--space-16));
  list-style: none;
}
.rail li {
  display: flex; align-items: baseline; gap: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  max-width: none;
}
.rail li span { font-size: var(--text-xs); color: var(--color-text-faint); letter-spacing: 0.1em; }
.rail li.is-human {
  background: var(--color-primary-fill);
  border-color: var(--color-primary-fill);
  color: #F4E9E3;
  font-weight: 600;
}
.rail li.is-human span { color: rgba(244, 233, 227, 0.72); }

/* =========================== two-up =========================== */
.twoup {
  display: grid; gap: clamp(var(--space-10), 5vw, var(--space-16));
  align-items: center; grid-template-columns: 1fr;
}
@media (min-width: 940px) { .twoup { grid-template-columns: 1.05fr 0.95fr; } }
.twoup__media img {
  width: 100%; border-radius: var(--radius-lg);
  aspect-ratio: 4 / 5; object-fit: cover;
}
.pillars { list-style: none; margin-top: var(--space-8); display: grid; gap: var(--space-6); }
.pillars dt { font-size: var(--text-lg); font-weight: 600; }
.pillars dd { color: var(--color-text-muted); font-size: var(--text-sm); margin-top: var(--space-2); }

/* =========================== closing =========================== */
.closing { text-align: center; }
.closing .h-section { margin-inline: auto; }
.closing .lede { margin-inline: auto; }
.closing .btn { margin-top: var(--space-10); }

/* ============================ footer ============================ */
.footer {
  border-top: 1px solid var(--color-divider);
  background: var(--color-surface);
  padding-block: clamp(var(--space-12), 6vw, var(--space-16));
  font-size: var(--text-sm);
}
.footer__top {
  display: grid; gap: var(--space-10);
  grid-template-columns: 1fr;
}
@media (min-width: 760px) { .footer__top { grid-template-columns: 1.4fr 1fr 1fr; } }
.footer h2 {
  font-size: var(--text-xs); letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--color-text-faint); margin-bottom: var(--space-4);
  font-family: var(--font-body); font-weight: 600;
}
.footer ul { list-style: none; display: grid; gap: var(--space-3); }
.footer a { color: var(--color-text-muted); text-decoration: none; }
.footer a:hover { color: var(--color-text); text-decoration: underline; }
.footer__note {
  margin-top: clamp(var(--space-10), 5vw, var(--space-12));
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  display: flex; flex-wrap: wrap; gap: var(--space-4) var(--space-8);
  justify-content: space-between;
  color: var(--color-text-faint);
  font-size: var(--text-xs);
}
.footer__note p { max-width: 60ch; }

/* ============================== legal ============================== */
.legal-head {
  border-bottom: 1px solid var(--color-divider);
  padding-block: clamp(var(--space-16), 8vw, var(--space-24)) clamp(var(--space-10), 5vw, var(--space-12));
  background: var(--color-surface);
}
.legal-head h1 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  letter-spacing: -0.015em;
}
.legal-head p { margin-top: var(--space-5); color: var(--color-text-muted); }
.legal-meta {
  margin-top: var(--space-6);
  font-size: var(--text-xs); letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--color-text-faint);
}

.prose { padding-block: clamp(var(--space-12), 6vw, var(--space-20)); }
.prose h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  margin-top: clamp(var(--space-12), 5vw, var(--space-16));
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  letter-spacing: -0.01em;
}
.prose h2:first-of-type { margin-top: 0; padding-top: 0; border-top: 0; }
.prose h3 {
  font-family: var(--font-body); font-weight: 600;
  font-size: var(--text-lg);
  margin-top: var(--space-8);
}
.prose p, .prose li { margin-top: var(--space-4); color: var(--color-text-muted); }
.prose p strong, .prose li strong { color: var(--color-text); font-weight: 600; }
.prose ul, .prose ol { margin-top: var(--space-4); padding-left: var(--space-6); }
.prose li { margin-top: var(--space-3); }
.prose li::marker { color: var(--color-text-faint); }
.prose dl { margin-top: var(--space-6); display: grid; gap: var(--space-5); }
.prose dt { font-weight: 600; }
.prose dd { color: var(--color-text-muted); margin-top: var(--space-2); }

.callout {
  margin-top: var(--space-8);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-primary-fill);
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
  padding: var(--space-6);
}
.callout p { margin-top: 0; color: var(--color-text); }
.callout p + p { margin-top: var(--space-4); }

.toc {
  margin-top: var(--space-8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  background: var(--color-surface-2);
}
.toc h2 {
  font-family: var(--font-body); font-weight: 600;
  font-size: var(--text-xs); letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--color-text-faint);
  margin: 0; padding: 0; border: 0;
}
.toc ol { margin-top: var(--space-4); padding-left: var(--space-5); }
.toc li { margin-top: var(--space-2); color: var(--color-text-muted); }
.toc a { color: var(--color-text-muted); text-decoration: none; }
.toc a:hover { color: var(--color-primary); text-decoration: underline; }

/* ============================= band ============================= */
.band { position: relative; overflow: hidden; background: #16080C; }
.band img {
  width: 100%;
  aspect-ratio: 21 / 7;
  min-height: 200px;
  object-fit: cover;
  object-position: 50% 42%;
}
@media (max-width: 640px) { .band img { aspect-ratio: 3 / 2; } }