/* West Coast Heat — editorial explainer
   Self-contained. No external fonts or frameworks. */

:root {
  color-scheme: light;
  --bg: #f4efe6;
  --bg-elev: #fffaf2;
  --bg-sunken: #ebe3d6;
  --ink: #231c16;
  --ink-muted: #5d5349;
  --line: #d9cfc0;
  --coast: #1b6565;
  --coast-soft: #d5ecea;
  --ridge: #9a4319;
  --ridge-bright: #c45c26;
  --sand: #e7d3ae;
  --gold: #e0a354;
  --warn: #8a3d14;
  --ok: #215c45;
  --focus: #1b6565;
  --shadow: 0 10px 30px rgba(35, 28, 22, 0.06);
  --font-serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --font-sans: "Avenir Next", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "ui-monospace", "SFMono-Regular", Menlo, Consolas, monospace;
  --max: 72rem;
  --prose: 41rem;
  --radius: 0.85rem;
  --header-h: 4.25rem;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #161310;
  --bg-elev: #221c18;
  --bg-sunken: #1b1714;
  --ink: #f3ebe2;
  --ink-muted: #b7aa9c;
  --line: #3c332c;
  --coast: #7ecac5;
  --coast-soft: #1d3332;
  --ridge: #f0a36a;
  --ridge-bright: #e8945a;
  --sand: #5a4630;
  --gold: #e0a354;
  --warn: #f0a36a;
  --ok: #8fcdb0;
  --focus: #7ecac5;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.28);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1rem);
}

@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: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--coast);
  text-underline-offset: 0.18em;
}

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

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

.skip-link {
  position: absolute;
  left: 0.75rem;
  top: -3rem;
  z-index: 80;
  background: var(--ink);
  color: var(--bg);
  padding: 0.5rem 0.8rem;
  border-radius: 0.4rem;
}

.skip-link:focus {
  top: 0.75rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner,
.wrap {
  width: min(var(--max), calc(100% - 2rem));
  margin-inline: auto;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header-h);
}

.site-nav {
  flex: 1;
  display: flex;
  justify-content: flex-end;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: inherit;
}

.brand-mark {
  width: 2.1rem;
  height: 2.1rem;
  flex: none;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-kicker {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.theme-toggle,
.nav-toggle {
  font: inherit;
  color: var(--ink);
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.4rem 0.8rem;
  cursor: pointer;
}

.theme-toggle:hover,
.nav-toggle:hover {
  border-color: color-mix(in srgb, var(--coast) 50%, var(--line));
}

.nav-toggle {
  display: none;
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem 0.9rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  color: var(--ink-muted);
  text-decoration: none;
  font-size: 0.92rem;
}

.site-nav a:hover,
.site-nav a[aria-current="location"] {
  color: var(--ink);
  text-decoration: underline;
}

.hero {
  padding: 2.2rem 0 1rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 2rem;
  align-items: center;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ridge);
  margin: 0 0 0.7rem;
}

h1,
h2,
h3,
.serif {
  font-family: var(--font-serif);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.18;
}

h1 {
  font-size: clamp(2.1rem, 5vw, 3.5rem);
  margin: 0 0 1rem;
}

h2 {
  font-size: clamp(1.7rem, 3vw, 2.25rem);
  margin: 0 0 0.8rem;
}

h3 {
  font-size: 1.25rem;
  margin: 0 0 0.45rem;
}

.lede {
  font-size: 1.2rem;
  color: var(--ink-muted);
  max-width: 38rem;
  margin: 0 0 1.25rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-bottom: 1.1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1rem;
  border-radius: 999px;
  text-decoration: none;
  border: 1px solid transparent;
  font-weight: 600;
}

.btn-primary {
  background: var(--coast);
  color: #f7fffe;
}

[data-theme="dark"] .btn-primary {
  color: #102221;
}

.btn-primary:hover {
  color: #f7fffe;
  filter: brightness(1.08);
}

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

.btn-ghost:hover {
  color: var(--ink);
  border-color: var(--ink-muted);
}

.note {
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
  padding: 0.85rem 1rem;
  background: var(--coast-soft);
  border-radius: var(--radius);
  color: var(--ink);
  font-size: 0.95rem;
}

.note strong {
  color: var(--coast);
}

.hero-art {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 1.2rem;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.hero-art svg {
  width: 100%;
  height: auto;
}

.section {
  padding: 3.2rem 0;
  border-top: 1px solid var(--line);
}

.section-kicker {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ridge);
  margin: 0 0 0.4rem;
}

.prose {
  max-width: var(--prose);
}

.prose p,
.prose ul,
.prose ol {
  margin: 0 0 1rem;
}

.prose ul,
.prose ol {
  padding-left: 1.2rem;
}

.prose li + li {
  margin-top: 0.35rem;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 1.5rem;
}

.card,
.callout,
.faq-item {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.card,
.callout {
  padding: 1.15rem 1.2rem 1.2rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.4rem;
}

.card h3 {
  margin-top: 0.7rem;
}

.card p:last-child,
.callout p:last-child {
  margin-bottom: 0;
}

.muted {
  color: var(--ink-muted);
}

.small {
  font-size: 0.92rem;
}

.diagram {
  margin: 1.5rem 0 0.4rem;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 1.1rem;
  padding: 1rem 1rem 0.7rem;
}

.diagram figcaption {
  color: var(--ink-muted);
  font-size: 0.88rem;
  margin: 0.4rem 0.2rem 0.3rem;
}

.diagram svg {
  width: 100%;
  height: auto;
}

.alert-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.3rem 0;
}

.alert-card h3 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.pill {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.18rem 0.45rem;
  border-radius: 999px;
  background: var(--bg-sunken);
}

.pill-advisory {
  color: var(--warn);
}

.pill-warning {
  color: #fff;
  background: var(--ridge-bright);
}

[data-theme="dark"] .pill-warning {
  color: #231c16;
}

.tips {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.2rem;
}

.tip-icon {
  width: 2rem;
  height: 2rem;
  color: var(--coast);
}

.faq-list {
  display: grid;
  gap: 0.7rem;
  margin-top: 1.1rem;
}

.faq-item button {
  width: 100%;
  text-align: left;
  font: inherit;
  font-family: var(--font-serif);
  font-size: 1.12rem;
  font-weight: 600;
  color: inherit;
  background: transparent;
  border: 0;
  padding: 1rem 2.6rem 1rem 1.1rem;
  cursor: pointer;
  position: relative;
}

.faq-item button::after {
  content: "";
  position: absolute;
  right: 1.1rem;
  top: 1.25rem;
  width: 0.55rem;
  height: 0.55rem;
  border-right: 2px solid var(--ink-muted);
  border-bottom: 2px solid var(--ink-muted);
  transform: rotate(45deg);
  transition: transform 0.16s ease;
}

.faq-item button[aria-expanded="true"]::after {
  top: 1.4rem;
  transform: rotate(225deg);
}

.faq-panel {
  padding: 0 1.1rem 1.05rem;
  color: var(--ink-muted);
}

.faq-panel[hidden] {
  display: none;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0 2.6rem;
  color: var(--ink-muted);
  font-size: 0.95rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 1.5rem;
}

.page-404 {
  min-height: 100vh;
  display: grid;
  align-content: center;
  padding: 3rem 0;
}

@media (max-width: 860px) {
  .hero-grid,
  .split,
  .alert-compare,
  .footer-grid,
  .card-grid,
  .tips {
    grid-template-columns: 1fr;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: var(--bg-elev);
    border-bottom: 1px solid var(--line);
    padding: 0.6rem 1rem 1rem;
    display: none;
  }

  .site-nav.is-open {
    display: block;
  }

  .site-nav ul {
    flex-direction: column;
    gap: 0.55rem;
  }

  .header-inner {
    position: relative;
  }
}

@media print {
  .site-header,
  .hero-actions,
  .theme-toggle,
  .nav-toggle {
    display: none !important;
  }

  body {
    background: #fff;
    color: #111;
  }

  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.85em;
    color: #444;
  }
}