/* SnowbirdDays — editorial design system.
 * Pure CSS, system font stacks, no external assets.
 * Direction: warm-paper editorial. Serif headlines pair with iOS-native sans body.
 */

/* ---------- Tokens ---------- */

:root {
  /* Color — warm light paper */
  --color-paper: #FAF7F2;
  --color-paper-2: #F2EDE3;
  --color-ink: #1A1A1A;
  --color-ink-soft: #4A453E;
  --color-ink-mute: #75706A;
  --color-rule: #E5DFD3;
  --color-accent: #FF6F50;
  --color-accent-deep: #D94F2D;
  --color-accent-soft: rgba(255, 111, 80, 0.10);

  /* Type stacks */
  --font-serif: 'Iowan Old Style', 'Hoefler Text', 'Charter', 'Source Serif Pro',
    'Apple Garamond', Garamond, Georgia, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI',
    Roboto, system-ui, sans-serif;
  --font-mono: ui-monospace, 'SF Mono', 'JetBrains Mono', Menlo, monospace;

  /* Type scale (fluid) */
  --t-hero: clamp(3rem, 1.5rem + 5vw, 6rem);
  --t-display: clamp(2.25rem, 1.4rem + 2.8vw, 3.5rem);
  --t-h2: clamp(1.4rem, 1.1rem + 1vw, 1.75rem);
  --t-h3: 1.125rem;
  --t-body: clamp(1rem, 0.95rem + 0.3vw, 1.125rem);
  --t-lead: clamp(1.125rem, 1rem + 0.5vw, 1.375rem);
  --t-small: 0.875rem;
  --t-eyebrow: 0.75rem;

  /* Spacing — varied by intent, not uniform */
  --s-1: 0.5rem;
  --s-2: 0.875rem;
  --s-3: 1.25rem;
  --s-4: 2rem;
  --s-5: 3rem;
  --s-6: 4.5rem;
  --s-7: 6.5rem;
  --s-section: clamp(4rem, 3rem + 4vw, 8rem);

  /* Layout */
  --w-prose: 38rem;     /* legal/long-form column ~ 608px */
  --w-wide: 64rem;
  --w-full: 80rem;

  /* Motion */
  --d-fast: 160ms;
  --d-base: 280ms;
  --e-out: cubic-bezier(0.16, 1, 0.3, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-paper: #1C1814;
    --color-paper-2: #25201B;
    --color-ink: #F5EFE7;
    --color-ink-soft: #C9C0B3;
    --color-ink-mute: #8C857A;
    --color-rule: #322C25;
    --color-accent: #FF8466;
    --color-accent-deep: #FFA286;
    --color-accent-soft: rgba(255, 132, 102, 0.12);
  }
}

/* ---------- Reset & base ---------- */

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

html {
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--t-body);
  line-height: 1.6;
  color: var(--color-ink);
  background-color: var(--color-paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  /* atmosphere: very subtle warm tint via radial wash, no images */
  background-image:
    radial-gradient(1200px 700px at 85% -10%, var(--color-accent-soft), transparent 60%),
    radial-gradient(900px 600px at -10% 110%, rgba(217, 79, 45, 0.06), transparent 55%);
  background-attachment: fixed;
}

/* Skip-to-content for keyboard users */
.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  padding: var(--s-2) var(--s-3);
  background: var(--color-ink);
  color: var(--color-paper);
  z-index: 100;
  text-decoration: none;
  border-radius: 4px;
}
.skip:focus { left: var(--s-2); top: var(--s-2); }

/* ---------- Typography ---------- */

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.1;
  margin: 0 0 var(--s-3);
  color: var(--color-ink);
  letter-spacing: -0.015em;
}

h2 {
  font-size: var(--t-h2);
  line-height: 1.2;
  font-weight: 600;
  margin-top: var(--s-5);
  letter-spacing: -0.012em;
}

h3 {
  font-family: var(--font-sans);
  font-size: var(--t-h3);
  font-weight: 600;
  letter-spacing: -0.005em;
  line-height: 1.35;
  margin: var(--s-4) 0 var(--s-2);
  color: var(--color-ink);
}

p {
  margin: 0 0 var(--s-3);
  color: var(--color-ink-soft);
}

p strong { color: var(--color-ink); }

ul, ol {
  margin: 0 0 var(--s-3);
  padding-left: 1.4rem;
  color: var(--color-ink-soft);
}

li { margin-bottom: 0.5rem; }
li strong { color: var(--color-ink); }

em { font-style: italic; }

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background-color: var(--color-paper-2);
  padding: 0.12em 0.4em;
  border-radius: 4px;
  color: var(--color-ink);
  border: 1px solid var(--color-rule);
}

/* ---------- Links ---------- */

a {
  color: var(--color-accent-deep);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: rgba(217, 79, 45, 0.45);
  transition: text-decoration-thickness var(--d-fast) var(--e-out),
              text-decoration-color var(--d-fast) var(--e-out),
              color var(--d-fast) var(--e-out);
}

@media (prefers-color-scheme: dark) {
  a { text-decoration-color: rgba(255, 132, 102, 0.55); }
}

a:hover,
a:focus-visible {
  text-decoration-thickness: 2px;
  text-decoration-color: currentColor;
}

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

/* ---------- Header ---------- */

.site-header {
  border-bottom: 1px solid var(--color-rule);
  background-color: rgba(250, 247, 242, 0.85);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  position: sticky;
  top: 0;
  z-index: 10;
}

@media (prefers-color-scheme: dark) {
  .site-header { background-color: rgba(28, 24, 20, 0.85); }
}

.site-header-inner {
  max-width: var(--w-full);
  margin: 0 auto;
  padding: var(--s-3) var(--s-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-4);
}

.brand {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--color-ink);
  text-decoration: none;
  line-height: 1;
}

.brand em {
  font-style: italic;
  color: var(--color-accent-deep);
  font-weight: 500;
}

.brand:hover,
.brand:focus-visible {
  color: var(--color-ink);
  text-decoration: none;
}

.site-nav {
  display: flex;
  gap: var(--s-3);
  align-items: center;
}

.site-nav a {
  font-family: var(--font-sans);
  font-size: var(--t-small);
  color: var(--color-ink-soft);
  text-decoration: none;
  letter-spacing: 0.01em;
  position: relative;
  padding: 0.35rem 0;
}

.site-nav a::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background-color: var(--color-accent-deep);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--d-base) var(--e-out);
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a[aria-current="page"] {
  color: var(--color-ink);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after,
.site-nav a[aria-current="page"]::after {
  transform: scaleX(1);
}

/* ---------- Layout primitives ---------- */

main { display: block; }

.shell-prose {
  max-width: var(--w-prose);
  margin: 0 auto;
  padding: var(--s-6) var(--s-4) var(--s-7);
}

.shell-wide {
  max-width: var(--w-wide);
  margin: 0 auto;
  padding: 0 var(--s-4);
}

/* ---------- Hero (index only) ---------- */

.hero {
  max-width: var(--w-full);
  margin: 0 auto;
  padding: clamp(3rem, 4vw + 2rem, 7rem) var(--s-4) var(--s-6);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--s-4);
  position: relative;
}

.hero-eyebrow {
  font-family: var(--font-sans);
  font-size: var(--t-eyebrow);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-accent-deep);
  font-weight: 600;
  margin: 0 0 var(--s-2);
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.hero-eyebrow::before {
  content: '';
  width: 1.5rem;
  height: 1px;
  background: var(--color-accent-deep);
  display: inline-block;
}

.hero h1 {
  font-size: var(--t-hero);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 0.98;
  margin: 0 0 var(--s-3);
  max-width: 18ch;
}

.hero h1 em {
  font-style: italic;
  color: var(--color-accent-deep);
  font-weight: 500;
}

.hero-lead {
  font-size: var(--t-lead);
  line-height: 1.45;
  color: var(--color-ink-soft);
  max-width: 36ch;
  margin: 0 0 var(--s-4);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
  align-items: center;
}

.hero-meta {
  margin-top: var(--s-3);
  font-size: var(--t-small);
  color: var(--color-ink-mute);
}

/* Animation: gentle fade-up on load, compositor-only */
.hero > * {
  opacity: 0;
  transform: translateY(8px);
  animation: rise var(--d-base) var(--e-out) forwards;
}
.hero-eyebrow { animation-delay: 0ms; }
.hero h1 { animation-delay: 80ms; }
.hero-lead { animation-delay: 160ms; }
.hero-actions { animation-delay: 240ms; }
.hero-meta { animation-delay: 320ms; }

@keyframes rise {
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.005em;
  padding: 0.75rem 1.25rem;
  border-radius: 999px;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform var(--d-fast) var(--e-out),
              background-color var(--d-fast) var(--e-out),
              border-color var(--d-fast) var(--e-out),
              color var(--d-fast) var(--e-out);
  will-change: transform;
}

.btn-primary {
  background-color: var(--color-accent-deep);
  color: #FFF8F4;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--color-ink);
  color: var(--color-paper);
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-rule);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--color-ink);
  color: var(--color-ink);
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-arrow {
  font-size: 1.05em;
  line-height: 1;
  transition: transform var(--d-fast) var(--e-out);
  display: inline-block;
}
.btn:hover .btn-arrow,
.btn:focus-visible .btn-arrow {
  transform: translateX(3px);
}

/* ---------- Privacy promise (anchored callout) ---------- */

.privacy-promise {
  max-width: var(--w-wide);
  margin: 0 auto var(--s-section);
  padding: 0 var(--s-4);
}

.privacy-card {
  position: relative;
  padding: clamp(1.75rem, 1rem + 2vw, 2.75rem) clamp(1.5rem, 1rem + 2vw, 3rem);
  background-color: var(--color-paper-2);
  border: 1px solid var(--color-rule);
  border-radius: 14px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--s-4);
  align-items: start;
}

.privacy-card::before {
  content: '';
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: linear-gradient(180deg, var(--color-accent), var(--color-accent-deep));
  border-radius: 14px 0 0 14px;
}

.privacy-mark {
  font-size: 2rem;
  line-height: 1;
  width: 3rem;
  height: 3rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--color-accent-soft);
  color: var(--color-accent-deep);
  flex-shrink: 0;
}

.privacy-card h2 {
  font-size: var(--t-h2);
  margin: 0 0 var(--s-1);
  letter-spacing: -0.015em;
}

.privacy-card h2 em {
  font-style: italic;
  color: var(--color-accent-deep);
}

.privacy-card p {
  margin: 0;
  color: var(--color-ink-soft);
  max-width: 60ch;
}

@media (max-width: 540px) {
  .privacy-card {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ---------- Bento (features grid) ---------- */

.section-features {
  max-width: var(--w-wide);
  margin: 0 auto var(--s-section);
  padding: 0 var(--s-4);
}

.section-head {
  margin-bottom: var(--s-5);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--s-3);
  align-items: end;
}

.section-head h2 {
  margin: 0;
  font-size: var(--t-display);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.022em;
  max-width: 14ch;
}

.section-head h2 em {
  font-style: italic;
  color: var(--color-accent-deep);
}

.section-eyebrow {
  font-size: var(--t-eyebrow);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-ink-mute);
  font-weight: 600;
  margin: 0 0 var(--s-2);
}

.bento {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  grid-auto-rows: minmax(0, auto);
  gap: var(--s-3);
}

.bento-card {
  grid-column: span 3;
  background-color: var(--color-paper-2);
  border: 1px solid var(--color-rule);
  border-radius: 14px;
  padding: clamp(1.5rem, 1rem + 1.5vw, 2.25rem);
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
  position: relative;
  transition: transform var(--d-base) var(--e-out),
              border-color var(--d-base) var(--e-out);
}

.bento-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-accent-deep);
}

/* Asymmetric: first card spans wider, second narrower, third+fourth even */
.bento-card:nth-child(1) { grid-column: span 4; }
.bento-card:nth-child(2) { grid-column: span 2; }
.bento-card:nth-child(3) { grid-column: span 2; }
.bento-card:nth-child(4) { grid-column: span 4; }

@media (max-width: 760px) {
  .bento-card,
  .bento-card:nth-child(1),
  .bento-card:nth-child(2),
  .bento-card:nth-child(3),
  .bento-card:nth-child(4) {
    grid-column: 1 / -1;
  }
}

.bento-mark {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-accent-deep);
  letter-spacing: 0.02em;
}

.bento-card h3 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.012em;
  margin: 0;
  color: var(--color-ink);
}

.bento-card p {
  margin: 0;
  color: var(--color-ink-soft);
  font-size: 1rem;
  line-height: 1.55;
}

.bento-card-detail {
  margin-top: auto;
  padding-top: var(--s-2);
  font-size: var(--t-small);
  color: var(--color-ink-mute);
  border-top: 1px solid var(--color-rule);
  font-family: var(--font-mono);
}

/* ---------- Aux sections (preparers, FAQ teaser, subscription) ---------- */

.split-cta {
  max-width: var(--w-wide);
  margin: 0 auto var(--s-section);
  padding: 0 var(--s-4);
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: var(--s-5);
  align-items: center;
}

.split-cta h2 {
  font-size: var(--t-display);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.022em;
  margin: 0 0 var(--s-3);
}

.split-cta h2 em {
  font-style: italic;
  color: var(--color-accent-deep);
}

.split-cta p {
  font-size: var(--t-lead);
  line-height: 1.5;
  color: var(--color-ink-soft);
  max-width: 42ch;
}

.split-cta-aside {
  border-left: 1px solid var(--color-rule);
  padding-left: var(--s-4);
}

.split-cta-aside h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 500;
  font-style: italic;
  margin: 0 0 var(--s-2);
  color: var(--color-ink);
}

.split-cta-aside ul {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: var(--t-small);
}

.split-cta-aside li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-rule);
  color: var(--color-ink-soft);
}

.split-cta-aside li:last-child { border-bottom: 0; }

@media (max-width: 760px) {
  .split-cta { grid-template-columns: minmax(0, 1fr); }
  .split-cta-aside { border-left: 0; padding-left: 0; padding-top: var(--s-3); border-top: 1px solid var(--color-rule); }
}

/* ---------- Long-form prose pages ---------- */

.shell-prose .page-back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--t-small);
  color: var(--color-ink-mute);
  text-decoration: none;
  margin-bottom: var(--s-4);
  font-family: var(--font-sans);
}

.shell-prose .page-back:hover,
.shell-prose .page-back:focus-visible {
  color: var(--color-accent-deep);
  text-decoration: none;
}

.shell-prose h1 {
  font-size: var(--t-display);
  font-weight: 500;
  line-height: 1.05;
  margin: 0 0 var(--s-3);
  letter-spacing: -0.022em;
}

.shell-prose .meta {
  font-family: var(--font-sans);
  font-size: var(--t-small);
  color: var(--color-ink-mute);
  margin: 0 0 var(--s-4);
  padding-bottom: var(--s-3);
  border-bottom: 1px solid var(--color-rule);
}

.shell-prose .meta strong {
  color: var(--color-ink-soft);
  font-weight: 600;
}

.shell-prose h2 {
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-ink);
  line-height: 1.3;
  margin: var(--s-5) 0 var(--s-2);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-rule);
}

.shell-prose h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 500;
  font-style: italic;
  letter-spacing: -0.005em;
  margin: var(--s-4) 0 var(--s-2);
  color: var(--color-ink);
}

.shell-prose p,
.shell-prose ul,
.shell-prose ol {
  font-size: var(--t-body);
  line-height: 1.65;
  color: var(--color-ink-soft);
}

.shell-prose ul,
.shell-prose ol {
  padding-left: 1.3rem;
}

/* Callout used inside legal copy */
.callout {
  background-color: var(--color-accent-soft);
  border-left: 3px solid var(--color-accent-deep);
  padding: var(--s-3) var(--s-4);
  margin: var(--s-4) 0;
  border-radius: 0 8px 8px 0;
}

.callout p { margin: 0; color: var(--color-ink); }
.callout strong { color: var(--color-ink); }

/* TOC for long pages */
.toc {
  margin: var(--s-4) 0 var(--s-5);
  padding: var(--s-3) 0;
  border-top: 1px solid var(--color-rule);
  border-bottom: 1px solid var(--color-rule);
}

.toc-title {
  font-family: var(--font-sans);
  font-size: var(--t-eyebrow);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-ink-mute);
  font-weight: 600;
  margin: 0 0 var(--s-2);
}

.toc ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.4rem 1rem;
  counter-reset: toc;
}

.toc li {
  counter-increment: toc;
  margin: 0;
  font-size: var(--t-small);
}

.toc li::before {
  content: counter(toc, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-ink-mute);
  margin-right: 0.5rem;
}

.toc a {
  text-decoration: none;
  color: var(--color-ink-soft);
}
.toc a:hover,
.toc a:focus-visible {
  color: var(--color-accent-deep);
  text-decoration: underline;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--color-rule);
  background-color: var(--color-paper-2);
  margin-top: var(--s-section);
}

.site-footer-inner {
  max-width: var(--w-full);
  margin: 0 auto;
  padding: var(--s-5) var(--s-4) var(--s-4);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, auto);
  gap: var(--s-4);
  align-items: end;
}

@media (max-width: 640px) {
  .site-footer-inner {
    grid-template-columns: minmax(0, 1fr);
  }
}

.site-footer-brand {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: -0.015em;
  margin: 0 0 var(--s-1);
  color: var(--color-ink);
}

.site-footer-brand em {
  font-style: italic;
  color: var(--color-accent-deep);
}

.site-footer p {
  margin: 0 0 0.4rem;
  font-size: var(--t-small);
  color: var(--color-ink-mute);
  max-width: 56ch;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3);
  font-size: var(--t-small);
}

.site-footer nav a {
  color: var(--color-ink-soft);
  text-decoration: none;
}

.site-footer nav a:hover,
.site-footer nav a:focus-visible {
  color: var(--color-accent-deep);
  text-decoration: underline;
  text-decoration-thickness: 1px;
}

.site-footer-disclaimer {
  font-style: italic;
  color: var(--color-ink-mute);
}

/* ---------- Small utilities ---------- */

.eyebrow {
  font-family: var(--font-sans);
  font-size: var(--t-eyebrow);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-ink-mute);
  font-weight: 600;
}

hr.rule {
  border: 0;
  border-top: 1px solid var(--color-rule);
  margin: var(--s-5) 0;
}

/* iPad and smaller */
@media (max-width: 540px) {
  .site-header-inner { padding: var(--s-2) var(--s-3); }
  .shell-prose { padding: var(--s-4) var(--s-3) var(--s-6); }
  .hero { padding-left: var(--s-3); padding-right: var(--s-3); }
  .privacy-promise,
  .section-features,
  .split-cta { padding-left: var(--s-3); padding-right: var(--s-3); }
  .site-footer-inner { padding-left: var(--s-3); padding-right: var(--s-3); }
}