/* ============================================================
   Desert Garden Guide — Main Stylesheet
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;1,300;1,400&family=Barlow+Condensed:wght@400;500;600&display=swap');

/* ── Tokens ─────────────────────────────────────────────── */
:root {
  --terra:   #C56B2A;
  --terra-d: #A3561F;
  --bg:      #EDE5D4;
  --surface: #F2EAD8;
  --ink:     #1E140A;
  --ink-2:   #4A3728;
  --ink-3:   #7A6050;
  --border:  rgba(30,20,10,.12);
  --radius:  4px;
  --max-w:   1160px;
  --prose-w: 720px;

  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-ui:      'Barlow Condensed', system-ui, sans-serif;
}

[data-theme="dark"] {
  --bg:      #181008;
  --surface: #211508;
  --ink:     #EDE5D4;
  --ink-2:   #C8B89A;
  --ink-3:   #8A7060;
  --border:  rgba(237,229,212,.10);
}

/* ── Reset ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1.7;
  transition: background .25s, color .25s;
}
img { display: block; max-width: 100%; height: auto; }
a { color: var(--terra); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Layout helpers ──────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 5vw, 3rem);
}
.prose { max-width: var(--prose-w); margin-inline: auto; }

/* ── Typography ──────────────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -.01em;
}
h1 { font-size: clamp(2.4rem, 5vw, 4rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); }
h3 { font-size: clamp(1.35rem, 2.5vw, 1.9rem); }
em { font-style: italic; }

.eyebrow {
  font-family: var(--font-ui);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--terra);
}

/* ── Header ──────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}
.site-logo { display: flex; flex-direction: row; align-items: center; gap: 10px; }
.site-logo:hover { text-decoration: none; }
.site-logo:hover .logo-words { text-decoration: none; }
.logo-icon { height: 40px; width: 40px; border-radius: 6px; object-fit: contain; }
.logo-words {
  display: flex;
  flex-direction: column;
  font-family: var(--font-ui);
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--terra);
  line-height: 1.05;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.logo-words--wide { flex-direction: row; gap: .4em; align-items: center; }
.site-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.site-nav a {
  font-family: var(--font-ui);
  font-size: .85rem;
  font-weight: 500;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--ink-2);
  transition: color .2s;
}
.site-nav a:hover { color: var(--terra); text-decoration: none; }

/* ── Theme toggle ────────────────────────────────────────── */
.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-2);
  transition: border-color .2s, color .2s;
  flex-shrink: 0;
}
.theme-toggle:hover { border-color: var(--terra); color: var(--terra); }
.theme-toggle svg { width: 16px; height: 16px; }
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: .65rem 1.5rem;
  border-radius: var(--radius);
  transition: background .2s, color .2s, border-color .2s, transform .15s;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary {
  background: var(--terra);
  color: #fff;
  border: 1px solid var(--terra);
}
.btn-primary:hover { background: var(--terra-d); border-color: var(--terra-d); }
.btn-outline {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--border);
}
.btn-outline:hover { border-color: var(--terra); color: var(--terra); }
.btn-group { display: flex; gap: .75rem; flex-wrap: wrap; }

/* ── Hero ────────────────────────────────────────────────── */
.hero {
  padding: clamp(3rem, 7vw, 6rem) 0;
}
.hero-inner {
  display: grid;
  grid-template-columns: 48% 1fr;
  gap: clamp(2rem, 4vw, 4.5rem);
  align-items: center;
}
.hero-text { display: flex; flex-direction: column; gap: 1.25rem; }
.hero-title { margin: 0; }
.hero-desc {
  font-size: clamp(.95rem, 1.6vw, 1.1rem);
  color: var(--ink-2);
  max-width: 44ch;
  line-height: 1.65;
}

/* Photo collage */
.dgg-collage {
  display: grid;
  grid-template-columns: 1.45fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 8px;
  height: clamp(380px, 55vh, 560px);
}
.dgg-photo { position: relative; overflow: hidden; border-radius: 6px; }
.dgg-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .55s ease, opacity .9s ease;
}
.dgg-photo:hover img { transform: scale(1.04); }

.dgg-credit {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: .55rem .7rem .5rem;
  background: linear-gradient(transparent, rgba(0,0,0,.72));
  color: rgba(255,255,255,.9);
  font-family: var(--font-ui);
  font-size: .62rem;
  letter-spacing: .05em;
  text-decoration: none;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity .25s, transform .25s;
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.dgg-photo:hover .dgg-credit { opacity: 1; transform: none; }
.dgg-photo-main { grid-row: 1 / 3; }
.dgg-photo-label {
  position: absolute;
  bottom: 10px;
  left: 10px;
  font-family: var(--font-ui);
  font-size: .65rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  background: rgba(0,0,0,.45);
  color: #fff;
  padding: .25rem .55rem;
  border-radius: 2px;
  backdrop-filter: blur(4px);
}

/* ── Plant strip ─────────────────────────────────────────── */
.plant-strip {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: .85rem 0;
  overflow: hidden;
}
.plant-strip-inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.plant-strip-label {
  font-family: var(--font-ui);
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--terra);
  white-space: nowrap;
  flex-shrink: 0;
  padding-right: 1.5rem;
  border-right: 1px solid var(--border);
}
.plant-strip-plants {
  display: flex;
  gap: 1.5rem;
  overflow-x: auto;
  scrollbar-width: none;
}
.plant-strip-plants::-webkit-scrollbar { display: none; }
.plant-strip-plants span {
  font-family: var(--font-ui);
  font-size: .78rem;
  font-weight: 500;
  letter-spacing: .06em;
  color: var(--ink-3);
  white-space: nowrap;
}

/* ── Section ─────────────────────────────────────────────── */
.section { padding: clamp(3.5rem, 7vw, 6rem) 0; }
.section-head { margin-bottom: clamp(2rem, 4vw, 3.5rem); }
.section-head h2 { margin-top: .5rem; }
.section-surface { background: var(--surface); }

/* ── Category cards ──────────────────────────────────────── */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.cat-card {
  border-right: 1px solid var(--border);
  transition: background .2s;
}
.cat-card:last-child { border-right: none; }
.cat-card:hover { background: var(--surface); }
.cat-link {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: 1.4rem 1.5rem;
  color: var(--ink);
  text-decoration: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 100%;
  font-family: inherit;
}
.cat-link:hover { text-decoration: none; }

/* ── Category filter grid (blog page) ───────────────── */
.cat-filter-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 1.75rem;
}
.cat-filter-grid .cat-filter-btn {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .85rem 1.1rem;
  background: var(--surface);
  border: none;
  border-radius: 0;
  color: var(--ink-2);
  font-family: var(--font-ui);
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background .18s, color .18s;
  width: 100%;
  text-align: left;
}
.cat-filter-grid .cat-filter-btn:hover { background: var(--border); color: var(--ink); }
.cat-filter-grid .cat-filter-btn.active {
  background: var(--terra);
  color: #fff;
}
.cat-filter-grid .cat-filter-btn .cat-icon { font-size: 1rem; }
.cat-filter-grid .cat-filter-btn .cat-name { flex: 1; }
@media (max-width: 600px) {
  .cat-filter-grid { grid-template-columns: repeat(2, 1fr); }
}
.cat-icon { font-size: 1.3rem; flex-shrink: 0; }
.cat-name {
  font-family: var(--font-ui);
  font-size: .85rem;
  font-weight: 600;
  letter-spacing: .04em;
  flex: 1;
}
.cat-arrow {
  font-size: .9rem;
  color: var(--ink-3);
  transition: transform .2s;
}
.cat-card:hover .cat-arrow { transform: translate(2px, -2px); color: var(--terra); }

/* ── Featured post ───────────────────────────────────────── */
.featured-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2.5rem, 5vw, 4.5rem);
  align-items: center;
}
.feat-img-wrap {
  position: relative;
  border-radius: 6px;
  overflow: hidden;
}
.feat-img-wrap img {
  width: 100%;
  height: clamp(280px, 45vw, 460px);
  object-fit: cover;
}
.feat-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  font-family: var(--font-ui);
  font-size: .65rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  background: var(--terra);
  color: #fff;
  padding: .3rem .65rem;
  border-radius: 2px;
}
.feat-text { display: flex; flex-direction: column; gap: 1rem; }
.feat-meta {
  font-family: var(--font-ui);
  font-size: .75rem;
  letter-spacing: .06em;
  color: var(--ink-3);
}
.feat-body { color: var(--ink-2); font-size: 1rem; line-height: 1.65; }

/* ── Posts grid ──────────────────────────────────────────── */
.posts-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: clamp(2rem, 4vw, 3rem);
}
.posts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(1.5rem, 3vw, 2.5rem);
}
.post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .25s, box-shadow .25s;
}
.post-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(0,0,0,.08);
}
.post-card-img {
  display: block;
  width: 100%;
  height: 200px;
  object-fit: cover;
}
.post-card-body { padding: 1.25rem 1.4rem 1.5rem; }
.post-card-cat {
  font-family: var(--font-ui);
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--terra);
  margin-bottom: .5rem;
  display: block;
}
.post-card-title {
  font-size: 1.25rem;
  font-weight: 400;
  line-height: 1.25;
  margin-bottom: .5rem;
}
.post-card-title a { color: var(--ink); }
.post-card-title a:hover { color: var(--terra); text-decoration: none; }
.post-card-excerpt {
  font-size: .9rem;
  color: var(--ink-2);
  line-height: 1.55;
  margin-bottom: .75rem;
}
.post-card-date {
  font-family: var(--font-ui);
  font-size: .72rem;
  letter-spacing: .05em;
  color: var(--ink-3);
}

/* ── Pull quote ──────────────────────────────────────────── */
.quote-section {
  padding: clamp(3rem, 7vw, 5.5rem) 0;
  text-align: center;
}
.pull-quote {
  max-width: 780px;
  margin-inline: auto;
  border: none;
}
.pull-quote p {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.8vw, 2rem);
  font-weight: 300;
  font-style: italic;
  line-height: 1.5;
  color: var(--ink);
  margin-bottom: 1.25rem;
}
.pull-quote cite {
  font-family: var(--font-ui);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--terra);
  font-style: normal;
}

/* ── Newsletter ──────────────────────────────────────────── */
.newsletter-section {
  background: #0F0A04;
  color: #EDE5D4;
  padding: clamp(3.5rem, 7vw, 6rem) 0;
  text-align: center;
}
.newsletter-section .eyebrow { color: var(--terra); }
.newsletter-section h2 { color: #EDE5D4; margin: .5rem 0 1rem; }
.nl-desc {
  color: rgba(237,229,212,.65);
  font-size: 1rem;
  margin-bottom: 2rem;
}
.nl-form {
  display: flex;
  gap: .75rem;
  max-width: 420px;
  margin-inline: auto;
  flex-wrap: wrap;
  justify-content: center;
}
.nl-input {
  flex: 1;
  min-width: 200px;
  padding: .65rem 1rem;
  font-family: var(--font-display);
  font-size: .95rem;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(237,229,212,.2);
  border-radius: var(--radius);
  color: #EDE5D4;
  outline: none;
  transition: border-color .2s;
}
.nl-input::placeholder { color: rgba(237,229,212,.4); }
.nl-input:focus { border-color: var(--terra); }
.nl-note {
  margin-top: 1rem;
  font-family: var(--font-ui);
  font-size: .72rem;
  letter-spacing: .08em;
  color: rgba(237,229,212,.4);
}

/* ── Footer ──────────────────────────────────────────────── */
.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-logo { display: inline-flex; align-items: center; gap: 8px; }
.footer-logo .logo-icon { height: 28px; }
.footer-logo .logo-words { flex-direction: row; gap: .35em; font-size: .8rem; }
.footer-nav {
  display: flex;
  gap: 1.5rem;
}
.footer-nav a {
  font-family: var(--font-ui);
  font-size: .78rem;
  font-weight: 500;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--ink-3);
  transition: color .2s;
}
.footer-nav a:hover { color: var(--terra); text-decoration: none; }
.footer-copy {
  font-family: var(--font-ui);
  font-size: .72rem;
  color: var(--ink-3);
}

/* ── Blog index ──────────────────────────────────────────── */
.blog-hero {
  padding: clamp(2.5rem, 5vw, 4.5rem) 0 clamp(2rem, 4vw, 3rem);
  border-bottom: 1px solid var(--border);
}

/* Category filter bar */
.cat-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  padding: 1.5rem 0 0;
}
.cat-filter-btn {
  font-family: var(--font-ui);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .07em;
  text-transform: uppercase;
  padding: .4rem .9rem;
  border: 1.5px solid var(--border);
  border-radius: 2rem;
  background: transparent;
  color: var(--ink-2);
  cursor: pointer;
  transition: background .18s, color .18s, border-color .18s;
}
.cat-filter-btn:hover,
.cat-filter-btn.active {
  background: var(--terra);
  border-color: var(--terra);
  color: #fff;
}
.post-card[hidden] { display: none; }

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: clamp(1.5rem, 3vw, 2.5rem);
  padding: clamp(2.5rem, 5vw, 4.5rem) 0;
}

/* ── Single post ─────────────────────────────────────────── */
.post-hero {
  padding: clamp(2.5rem, 5vw, 4rem) 0 clamp(1.5rem, 3vw, 2.5rem);
  text-align: center;
}
.post-hero-cat {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--terra);
  margin-bottom: .75rem;
}
.post-hero h1 { max-width: 18ch; margin-inline: auto; }
.post-hero-meta {
  font-family: var(--font-ui);
  font-size: .75rem;
  letter-spacing: .06em;
  color: var(--ink-3);
  margin-top: 1rem;
}
.post-featured-img {
  width: 100%;
  max-width: 860px;
  margin-inline: auto;
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: clamp(2rem, 5vw, 4rem);
}
.post-featured-img img {
  width: 100%;
  height: clamp(280px, 45vw, 500px);
  object-fit: cover;
}
.post-content {
  max-width: var(--prose-w);
  margin-inline: auto;
  padding: 0 clamp(1.25rem, 5vw, 3rem) clamp(3rem, 7vw, 6rem);
}
.post-content h2 { margin-top: 2.5rem; margin-bottom: .75rem; }
.post-content h3 { margin-top: 2rem; margin-bottom: .5rem; }
.post-content p { margin-bottom: 1.25rem; }
.post-content ul, .post-content ol {
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
}
.post-content li { margin-bottom: .4rem; }
.post-content blockquote {
  border-left: 3px solid var(--terra);
  padding-left: 1.25rem;
  margin: 2rem 0;
  font-style: italic;
  color: var(--ink-2);
}
.post-content strong { font-weight: 500; color: var(--ink); }
.post-content a { color: var(--terra); }

/* Affiliate disclosure */
.affiliate-disclosure {
  font-family: var(--font-ui);
  font-size: .65rem;
  color: var(--ink-3);
  opacity: .6;
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  letter-spacing: .02em;
}

/* Photo credit */
.photo-credit {
  font-family: var(--font-ui);
  font-size: .7rem;
  color: var(--ink-3);
  text-align: right;
  margin-top: .4rem;
  letter-spacing: .04em;
}
.photo-credit a { color: var(--ink-3); text-decoration: none; }
.photo-credit a:hover { color: var(--terra); }

/* ── About page ──────────────────────────────────────────── */
.about-hero {
  padding: clamp(3rem, 6vw, 5rem) 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}
.about-img { border-radius: 6px; overflow: hidden; }
.about-img img {
  width: 100%;
  height: clamp(280px, 40vw, 480px);
  object-fit: cover;
}
.about-text { display: flex; flex-direction: column; gap: 1.25rem; }
.about-text p { color: var(--ink-2); }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .dgg-collage { height: 340px; }
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .cat-card:nth-child(2) { border-right: none; }
  .cat-card:nth-child(1),
  .cat-card:nth-child(2) { border-bottom: 1px solid var(--border); }
  .featured-inner { grid-template-columns: 1fr; }
  .about-hero { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .site-nav { gap: 1rem; }
  .site-nav a { font-size: .78rem; }
  .posts-grid { grid-template-columns: 1fr; }
  .blog-grid { grid-template-columns: 1fr; }
  .posts-header { flex-direction: column; align-items: flex-start; gap: 1rem; }
  .cat-grid { grid-template-columns: 1fr; border: none; gap: .5rem; }
  .cat-card { border-right: none; border: 1px solid var(--border); border-radius: var(--radius); }
  .cat-card:nth-child(1), .cat-card:nth-child(2) { border-bottom: 1px solid var(--border); }
  .footer-inner { flex-direction: column; text-align: center; }
  .footer-nav { justify-content: center; }
}

@media (max-width: 420px) {
  .site-nav { display: none; }
}

/* ── Reading progress bar ────────────────────────────────── */
.reading-progress {
  position: fixed;
  top: 64px;
  left: 0;
  width: 0%;
  height: 3px;
  background: var(--terra);
  z-index: 99;
  transition: width .08s linear;
  pointer-events: none;
}

/* ── Table of contents ───────────────────────────────────── */
.post-toc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--terra);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin: 0 0 2.5rem;
  font-family: var(--font-ui);
}
.post-toc-title {
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--terra);
  margin-bottom: .8rem;
}
.post-toc ol {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: toc-c;
}
.post-toc li {
  counter-increment: toc-c;
  display: flex;
  align-items: baseline;
  gap: .6rem;
  margin-bottom: .4rem;
}
.post-toc li::before {
  content: counter(toc-c, decimal-leading-zero);
  font-size: .62rem;
  color: var(--ink-3);
  flex-shrink: 0;
  min-width: 1.4em;
}
.post-toc a {
  font-size: .82rem;
  line-height: 1.35;
  color: var(--ink-2);
  text-decoration: none;
  transition: color .18s;
}
.post-toc a:hover { color: var(--terra); text-decoration: none; }
.post-toc .toc-h3 { padding-left: 1.1rem; }
.post-toc .toc-h3::before { content: '—'; font-size: .65rem; }

/* ── Back to top ─────────────────────────────────────────── */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 42px;
  height: 42px;
  background: var(--terra);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity .25s, transform .25s, background .2s;
  z-index: 200;
  box-shadow: 0 4px 16px rgba(0,0,0,.15);
}
.back-to-top.visible { opacity: 1; pointer-events: auto; transform: none; }
.back-to-top:hover { background: var(--terra-d); transform: translateY(-2px); }
.back-to-top svg { width: 18px; height: 18px; }

/* ── Data tables ─────────────────────────────────────────── */
.data-table { width: 100%; border-collapse: collapse; margin: 1.75rem 0; font-family: var(--font-ui); font-size: .875rem; overflow-x: auto; display: block; }
.data-table thead th { background: var(--terra); color: #fff; padding: .55rem .85rem; text-align: left; font-weight: 600; letter-spacing: .04em; white-space: nowrap; }
.data-table td { padding: .55rem .85rem; border-bottom: 1px solid var(--border); vertical-align: top; color: var(--ink-2); }
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:nth-child(even) td { background: rgba(0,0,0,.03); }
[data-theme="dark"] .data-table thead th { background: var(--terra-d); }
[data-theme="dark"] .data-table tr:nth-child(even) td { background: rgba(255,255,255,.04); }
@media (max-width: 700px) { .data-table { font-size: .8rem; } .data-table td, .data-table thead th { padding: .45rem .6rem; } }