/* Sunflower Habitat - Botanical Field Note Styles */

:root {
  --color-paper: #fbf9f4;
  --color-paper-shade: #f3efe6;
  --color-text: #1d3326;
  --color-text-muted: #3d5244;
  --color-border: #ded8cb;
  --color-accent-gold: #c28816;
  --color-accent-subtle: #846316;
  --color-focus: #1d3326;
  --font-serif: Georgia, 'Times New Roman', Times, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --measure: 62ch;
}

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

html {
  background-color: var(--color-paper);
  color: var(--color-text);
  font-family: var(--font-sans);
  line-height: 1.65;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Accessibility Skip Link */
.skip-link {
  position: absolute;
  top: -10rem;
  left: 1.5rem;
  background: var(--color-text);
  color: var(--color-paper);
  padding: 0.75rem 1.25rem;
  text-decoration: none;
  font-weight: 600;
  border-radius: 0 0 4px 4px;
  z-index: 1000;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0;
  outline: 3px solid var(--color-accent-gold);
}

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

/* Site Header */
.site-header {
  border-bottom: 1px solid var(--color-border);
  padding: 1.75rem 1.5rem;
}

.site-header__inner {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.site-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: normal;
  margin: 0;
  letter-spacing: 0.02em;
  color: var(--color-text);
}

.site-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 1.75rem;
}

.site-nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  letter-spacing: 0.03em;
}

.site-nav a:hover {
  color: var(--color-text);
  text-decoration: underline;
}

/* Main Content Layout */
.site-main {
  flex: 1;
  max-width: 1080px;
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem;
  width: 100%;
}

/* Hero Section */
.hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: start;
  padding-bottom: 3.5rem;
  border-bottom: 1px solid var(--color-border);
}

@media (min-width: 768px) {
  .hero {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 4rem;
    align-items: center;
    padding-bottom: 4.5rem;
  }
}

.hero__tagline {
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent-subtle);
  font-weight: 600;
  margin: 0 0 0.75rem 0;
}

.hero__heading {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 4.5vw, 3.6rem);
  line-height: 1.15;
  font-weight: normal;
  color: var(--color-text);
  margin: 0 0 0.5rem 0;
}

.hero__subheading {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--color-text-muted);
  margin: 0 0 1.75rem 0;
}

.lead {
  font-size: 1.125rem;
  line-height: 1.75;
  max-width: var(--measure);
  margin: 0;
  color: var(--color-text);
}

.hero__figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero__image {
  width: 100%;
  max-width: 380px;
  aspect-ratio: 4 / 5;
  object-fit: contain;
  background-color: var(--color-paper-shade);
  border: 1px solid var(--color-border);
  padding: 0.5rem;
  display: block;
}

.hero__caption {
  margin-top: 0.65rem;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
}

/* Connected Chapters */
.chapters-flow {
  max-width: var(--measure);
  margin: 4rem 0;
}

.chapter {
  margin-bottom: 3.5rem;
}

.chapter:last-child {
  margin-bottom: 0;
}

.chapter__heading {
  font-family: var(--font-serif);
  font-size: 1.65rem;
  font-weight: normal;
  line-height: 1.3;
  color: var(--color-text);
  margin: 0 0 1rem 0;
  position: relative;
  padding-bottom: 0.4rem;
}

.chapter__heading::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 2.2rem;
  height: 2px;
  background-color: var(--color-accent-gold);
}

.chapter__body {
  font-size: 1.05rem;
  line-height: 1.75;
  margin: 0;
  color: var(--color-text);
}

/* Inline Citations */
.citation-ref {
  font-size: 0.75em;
  vertical-align: super;
  line-height: 0;
  color: var(--color-accent-subtle);
  text-decoration: none;
  padding: 0 0.15rem;
  font-weight: 600;
}

.citation-ref:hover {
  text-decoration: underline;
  color: var(--color-text);
}

/* Sources Section */
.sources-section {
  margin-top: 4.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--color-border);
  max-width: var(--measure);
}

.sources-heading {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: normal;
  margin: 0 0 1.5rem 0;
  color: var(--color-text);
}

.sources-list {
  margin: 0;
  padding-left: 1.25rem;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--color-text-muted);
}

.sources-list li {
  margin-bottom: 0.85rem;
  word-break: break-word;
}

.sources-list li:target {
  background-color: var(--color-paper-shade);
  outline: 2px solid var(--color-accent-gold);
  outline-offset: 4px;
}

.source-author {
  font-weight: 600;
  color: var(--color-text);
}

.sources-list a {
  color: var(--color-accent-subtle);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.sources-list a:hover {
  color: var(--color-text);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 2.5rem 1.5rem;
  background-color: var(--color-paper-shade);
  color: var(--color-text-muted);
  font-size: 0.875rem;
  line-height: 1.6;
}

.site-footer__inner {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.site-footer p {
  margin: 0;
}

@media (min-width: 600px) {
  .site-footer__inner {
    flex-direction: row;
    justify-content: space-between;
  }
}
/* Keep the narrowest phone header comfortable; no remote fonts or scripts. */
.site-header__inner { gap: 1rem; flex-wrap: wrap; }
.hero__caption { line-height: 1.6; max-width: 380px; letter-spacing: 0; }
.hero__caption a { color: var(--color-text-muted); text-underline-offset: 2px; }
:target { scroll-margin-top: 1.5rem; }
@media (prefers-reduced-motion: reduce) { .skip-link { transition: none; } }


.site-title { display: flex; align-items: center; gap: .65rem; }
.site-mark { width: 32px; height: 32px; object-fit: contain; }
.habitat-record { display: flex; gap: 1.5rem; align-items: center; margin: 1.75rem 0 0; }
.habitat-record > a { flex: 0 0 150px; }
.habitat-record img { display: block; width: 150px; height: auto; }
.habitat-record figcaption { font-size: .8rem; line-height: 1.7; color: var(--color-text-muted); }
.habitat-record figcaption a { color: var(--color-text-muted); text-underline-offset: 2px; }
@media (max-width: 460px) {
  .habitat-record { flex-direction: column; align-items: flex-start; gap: .8rem; }
  .habitat-record > a { flex-basis: auto; }
}