/* ==========================================================================
   Nightlight Journal — Shared Stylesheet
   Premium nighttime-wellness editorial design system
   ========================================================================== */

:root {
  /* Palette: deep indigo night sky, soft moonlight, warm amber accent */
  --color-ink: #1b1f3b;
  --color-ink-soft: #2c3159;
  --color-night: #232852;
  --color-twilight: #4a4f7a;
  --color-mist: #8b8fb3;
  --color-cloud: #e9e9f5;
  --color-paper: #faf9f6;
  --color-paper-alt: #f2f0ea;
  --color-moon: #fffdf8;
  --color-accent: #c9a24b;
  --color-accent-soft: #e7d6a8;
  --color-accent-deep: #7d5d20;
  --color-sage: #8fa892;
  --color-line: #e2e0d6;
  /* WCAG AA-compliant (4.5:1+) variant of --color-mist for small/secondary
     text on light backgrounds (breadcrumbs, card meta labels, disclosure
     notes, legal "last updated" text). --color-mist itself stays lighter
     for use on dark backgrounds, where it already passes AA. */
  --color-mist-text: #5f6389;
  --color-focus: #6a6fb0;

  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body: "Work Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;

  --shadow-soft: 0 20px 60px -25px rgba(27, 31, 59, 0.35);
  --shadow-card: 0 10px 30px -15px rgba(27, 31, 59, 0.25);

  --max-width: 1140px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-ink);
  background: var(--color-paper);
  line-height: 1.7;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

img,
svg {
  max-width: 100%;
  display: block;
}

a {
  color: var(--color-accent-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--color-ink);
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  color: var(--color-ink);
  line-height: 1.22;
  font-weight: 600;
  margin: 0 0 0.6em;
}

h1 {
  font-size: clamp(2.1rem, 4.5vw, 3.4rem);
  font-weight: 500;
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.3rem);
}

h3 {
  font-size: clamp(1.2rem, 2vw, 1.5rem);
}

p {
  margin: 0 0 1.2em;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------------- Skip link ---------------- */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-ink);
  color: var(--color-moon);
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  z-index: 999;
}

.skip-link:focus {
  left: 16px;
  top: 16px;
}

/* ---------------- Top utility bar ---------------- */
.top-notice {
  background: var(--color-ink);
  color: var(--color-cloud);
  font-size: 0.82rem;
  text-align: center;
  padding: 8px 16px;
  letter-spacing: 0.01em;
}

.top-notice a {
  color: var(--color-accent-soft);
}

/* ---------------- Header ---------------- */
.site-header {
  background: var(--color-paper);
  border-bottom: 1px solid var(--color-line);
  position: sticky;
  top: 0;
  z-index: 50;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  padding-bottom: 18px;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--color-ink);
  text-decoration: none;
  font-weight: 600;
  white-space: nowrap;
}

.brand:hover {
  color: var(--color-ink);
}

.brand-mark {
  width: 30px;
  height: 30px;
  flex-shrink: 0;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 26px;
  flex-wrap: wrap;
}

.main-nav a {
  color: var(--color-ink-soft);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}

.main-nav a:hover {
  color: var(--color-accent-deep);
}

.nav-cta {
  background: var(--color-ink);
  color: var(--color-moon) !important;
  padding: 10px 20px;
  border-radius: 999px;
  font-weight: 600 !important;
  white-space: nowrap;
}

.nav-cta:hover {
  background: var(--color-accent-deep);
  color: var(--color-moon) !important;
}

.nav-toggle {
  display: none;
}

/* ---------------- Breadcrumbs ---------------- */
.breadcrumbs {
  font-size: 0.85rem;
  color: var(--color-mist-text);
  padding: 18px 0 0;
}

.breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
}

.breadcrumbs a {
  color: var(--color-twilight);
  text-decoration: none;
}

.breadcrumbs a:hover {
  color: var(--color-accent-deep);
}

.breadcrumbs li:not(:last-child)::after {
  content: "/";
  margin-left: 8px;
  color: var(--color-mist-text);
}

/* ---------------- Hero ---------------- */
.hero {
  background: linear-gradient(180deg, var(--color-ink) 0%, var(--color-night) 55%, var(--color-ink-soft) 100%);
  color: var(--color-cloud);
  position: relative;
  overflow: hidden;
  padding: 72px 0 88px;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 20% 20%, rgba(255,255,255,0.05) 0, transparent 45%),
                     radial-gradient(circle at 80% 10%, rgba(255,255,255,0.04) 0, transparent 40%);
  pointer-events: none;
}

.hero .container {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-accent-soft);
  margin-bottom: 18px;
  font-weight: 600;
}

.hero h1 {
  color: var(--color-moon);
}

.hero-lede {
  color: var(--color-cloud);
  font-size: 1.08rem;
  max-width: 54ch;
}

.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-visual svg {
  width: 100%;
  max-width: 320px;
}

/* ---------------- Buttons ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-ink) !important;
}

.btn-primary:hover {
  background: var(--color-accent-soft);
  transform: translateY(-1px);
}

.btn-outline {
  border-color: var(--color-cloud);
  color: var(--color-moon) !important;
}

.btn-outline:hover {
  background: rgba(255,255,255,0.08);
}

.btn-dark {
  background: var(--color-ink);
  color: var(--color-moon) !important;
}

.btn-dark:hover {
  background: var(--color-accent-deep);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  margin-top: 30px;
}

/* ---------------- Disclosure note ---------------- */
.disclosure-note {
  font-size: 0.82rem;
  color: var(--color-mist-text);
  margin-top: 14px;
  max-width: 54ch;
  line-height: 1.6;
}

.hero .disclosure-note {
  color: #b7bade;
}

.disclosure-box {
  background: var(--color-paper-alt);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 18px 22px;
  font-size: 0.92rem;
  color: var(--color-twilight);
  margin: 28px 0;
}

/* ---------------- Sections ---------------- */
section {
  padding: 72px 0;
}

.section-alt {
  background: var(--color-paper-alt);
}

.section-dark {
  background: var(--color-ink);
  color: var(--color-cloud);
}

.section-dark h2,
.section-dark h3 {
  color: var(--color-moon);
}

.section-head {
  max-width: 700px;
  margin: 0 0 40px;
}

.section-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-kicker {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--color-accent-deep);
  margin-bottom: 10px;
  display: block;
}

/* ---------------- Cards / grid ---------------- */
.grid {
  display: grid;
  gap: 26px;
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.card {
  background: var(--color-moon);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-card);
}

.card h3 {
  margin-bottom: 10px;
}

.card .meta {
  font-size: 0.8rem;
  color: var(--color-mist-text);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  margin-bottom: 8px;
  display: block;
}

.ingredient-card {
  border-top: 3px solid var(--color-accent);
}

.limitation {
  background: var(--color-paper-alt);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-size: 0.88rem;
  color: var(--color-twilight);
  margin-top: 14px;
}

.limitation strong {
  color: var(--color-ink);
}

/* ---------------- Icon tiles ---------------- */
.icon-tile {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--color-paper-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.icon-tile svg {
  width: 24px;
  height: 24px;
}

/* ---------------- Lists ---------------- */
.check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.check-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.check-list svg {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-top: 3px;
  color: var(--color-accent-deep);
}

/* ---------------- FAQ ---------------- */
.faq-item {
  border-bottom: 1px solid var(--color-line);
  padding: 22px 0;
}

.faq-item summary {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: 1.5rem;
  color: var(--color-accent-deep);
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item p {
  margin-top: 14px;
  color: var(--color-twilight);
}

/* ---------------- Callout / final CTA ---------------- */
.callout {
  background: linear-gradient(135deg, var(--color-ink) 0%, var(--color-ink-soft) 100%);
  color: var(--color-moon);
  border-radius: var(--radius-lg);
  padding: 56px;
  text-align: center;
  box-shadow: var(--shadow-soft);
}

.callout h2 {
  color: var(--color-moon);
}

.callout p {
  color: var(--color-cloud);
  max-width: 60ch;
  margin-left: auto;
  margin-right: auto;
}

/* ---------------- Table of contents ---------------- */
.toc {
  background: var(--color-paper-alt);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin: 32px 0;
}

.toc p.meta {
  margin: 0 0 10px;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--color-accent-deep);
}

.toc ol {
  margin: 0;
  padding-left: 20px;
}

.toc li {
  margin-bottom: 6px;
}

/* ---------------- Article layout ---------------- */
.article-hero {
  padding: 48px 0 40px;
  background: var(--color-paper-alt);
}

.article-meta {
  font-size: 0.85rem;
  color: var(--color-mist-text);
  margin-bottom: 14px;
}

.article-body {
  padding: 48px 0 20px;
}

.article-body h2 {
  margin-top: 1.6em;
}

.article-body h3 {
  margin-top: 1.4em;
}

.article-body ul,
.article-body ol {
  padding-left: 1.3em;
}

.article-body li {
  margin-bottom: 0.5em;
}

.pull-quote {
  border-left: 4px solid var(--color-accent);
  padding: 6px 0 6px 22px;
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--color-ink-soft);
  margin: 32px 0;
}

.related-guides {
  padding: 20px 0 64px;
}

.related-guides .grid {
  margin-top: 24px;
}

.guide-card {
  display: block;
  text-decoration: none;
  color: inherit;
}

.guide-card .card {
  height: 100%;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.guide-card:hover .card {
  transform: translateY(-3px);
  box-shadow: var(--shadow-soft);
}

.guide-card h3 {
  color: var(--color-ink);
}

/* ---------------- Footer ---------------- */
.site-footer {
  background: var(--color-ink);
  color: var(--color-cloud);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 36px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}

.footer-grid h3 {
  color: var(--color-moon);
  font-family: var(--font-body);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.footer-grid ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.footer-grid a {
  color: var(--color-cloud);
  text-decoration: none;
  font-size: 0.92rem;
}

.footer-grid a:hover {
  color: var(--color-accent-soft);
}

.footer-brand p {
  color: #b7bade;
  font-size: 0.9rem;
  max-width: 40ch;
}

.footer-bottom {
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: #9497c0;
}

.footer-bottom a {
  color: #b7bade;
}

/* ---------------- Utility ---------------- */
.text-center {
  text-align: center;
}

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

.badge {
  display: inline-block;
  background: var(--color-paper-alt);
  color: var(--color-ink-soft);
  border-radius: 999px;
  padding: 5px 14px;
  font-size: 0.78rem;
  font-weight: 600;
  margin: 3px 6px 3px 0;
}

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

hr.divider {
  border: none;
  border-top: 1px solid var(--color-line);
  margin: 48px 0;
}

/* ---------------- Legal pages ---------------- */
.legal-body h2 {
  margin-top: 1.8em;
}

.legal-body p,
.legal-body li {
  color: var(--color-ink-soft);
}

.legal-updated {
  color: var(--color-mist-text);
  font-size: 0.85rem;
}

/* ---------------- Responsive ---------------- */
@media (max-width: 920px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .hero .container {
    grid-template-columns: 1fr;
  }
  .hero-visual {
    order: -1;
  }
  .hero-visual svg {
    max-width: 200px;
  }
}

@media (max-width: 720px) {
  .main-nav {
    display: none;
  }
  .main-nav.open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-paper);
    flex-direction: column;
    padding: 20px 24px 28px;
    border-bottom: 1px solid var(--color-line);
    gap: 16px;
  }
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 10px;
    border: 1px solid var(--color-line);
    background: var(--color-paper);
    cursor: pointer;
  }
  .nav-toggle svg {
    width: 20px;
    height: 20px;
  }
}

@media (max-width: 640px) {
  section {
    padding: 52px 0;
  }
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .callout {
    padding: 36px 24px;
  }
  body {
    font-size: 16px;
  }
}