/* ==========================================================================
   Planted Tank Guide — shared design system
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
img { max-width: 100%; display: block; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
ul, ol { list-style: none; }

/* ---------- Tokens: Light (default) ---------- */
:root {
  --bg: #eef1eb;
  --bg-soft: #e5eae0;
  --card-bg: #f5f7f2;
  --border: #d2dccb;
  --border-strong: #b9c7ae;
  --text: #16211a;
  --text-muted: #55655a;
  --text-faint: #7c8b7f;
  --accent: #295f43;
  --accent-soft: #295f4314;
  --accent-soft-strong: #295f431f;
  --nav-bg: #eef1ebcc;
  --nav-bg-scrolled: #eef1eba8;
  --focus-ring: #295f43;
  --danger: #8a4a2c;
  --badge-blue: #1d6f96;
  --badge-gold: #96751a;
  --badge-orange: #915543;
  --badge-blue-soft: #1d6f9614;
  --badge-gold-soft: #96751a14;
  --basket-gold-bg: #96751a40;
  --basket-accent-bg: #295f4340;
  --basket-blue-bg: #1d6f9640;
  --basket-red-bg: #D6454540;

  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'DM Mono', 'SF Mono', Menlo, monospace;

  --radius: 6px;
  --transition: 180ms ease;
}

/* ---------- Tokens: Dark (OS preference) ---------- */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #050a07;
    --bg-soft: #080f0b;
    --card-bg: #0a130e;
    --border: #264a38;
    --border-strong: #36684f;
    --text: #e9efe9;
    --text-muted: #a3b5a8;
    --text-faint: #71857a;
    --accent: #48ab74;
    --accent-soft: #48ab7422;
    --accent-soft-strong: #48ab7433;
    --nav-bg: #050a07cc;
    --nav-bg-scrolled: #050a07a8;
    --focus-ring: #48ab74;
    --danger: #d99566;
    --badge-blue: #52b8e8;
    --badge-gold: #e3bb52;
    --badge-orange: #c6846a;
    --badge-blue-soft: #52b8e822;
    --badge-gold-soft: #e3bb5222;
    --basket-gold-bg: var(--badge-gold-soft);
    --basket-accent-bg: var(--accent-soft);
    --basket-blue-bg: var(--badge-blue-soft);
  }
}

/* ---------- Tokens: Dark (explicit toggle) ---------- */
:root[data-theme="dark"] {
  --bg: #050a07;
  --bg-soft: #080f0b;
  --card-bg: #0a130e;
  --border: #264a38;
  --border-strong: #36684f;
  --text: #e9efe9;
  --text-muted: #a3b5a8;
  --text-faint: #71857a;
  --accent: #48ab74;
  --accent-soft: #48ab7422;
  --accent-soft-strong: #48ab7433;
  --nav-bg: #050a07cc;
  --nav-bg-scrolled: #050a07a8;
  --focus-ring: #48ab74;
  --danger: #d99566;
  --badge-blue: #52b8e8;
  --badge-gold: #e3bb52;
  --badge-orange: #c6846a;
  --badge-blue-soft: #52b8e822;
  --badge-gold-soft: #e3bb5222;
  --basket-gold-bg: var(--badge-gold-soft);
  --basket-accent-bg: var(--accent-soft);
  --basket-blue-bg: var(--badge-blue-soft);
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

main { overflow-x: hidden; }

/* ---------- Selection & Scrollbar ---------- */
::selection {
  background: var(--accent);
  color: var(--bg);
}
html {
  scrollbar-width: thin;
  scrollbar-color: var(--accent) transparent;
}
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 6px;
  border: 3px solid var(--bg);
  background-clip: padding-box;
}
::-webkit-scrollbar-thumb:hover {
  border-width: 2px;
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 32px;
}

.wrap-narrow {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 32px;
}

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

p a, li a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: var(--border-strong);
  text-underline-offset: 3px;
  transition: text-decoration-color var(--transition);
}
p a:hover, li a:hover { text-decoration-color: var(--accent); }

a[target="_blank"]::after {
  content: "↗";
  display: inline-block;
  font-size: 0.7em;
  margin-left: 0.15em;
  transform: translateY(-0.05em);
}

/* ---------- Reading progress bar (inner pages only) ---------- */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: var(--accent);
  z-index: 100;
  pointer-events: none;
}

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--nav-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  transition: background-color var(--transition), backdrop-filter var(--transition);
}
.nav.nav-scrolled {
  background: var(--nav-bg-scrolled);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  max-width: 1080px;
  margin: 0 auto;
  gap: 20px;
}
.wordmark {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  text-decoration: none;
  white-space: nowrap;
}
.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}
.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-decoration: none;
  color: var(--text-muted);
  letter-spacing: 0.02em;
  transition: color var(--transition);
  white-space: nowrap;
}
.nav-links a:hover, .nav-links a:focus-visible { color: var(--accent); }
.nav-links a.active { color: var(--accent); }

.nav-right { display: flex; align-items: center; gap: 16px; }

.theme-toggle {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 8px 14px;
  color: var(--text-muted);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition), color var(--transition);
  flex-shrink: 0;
}
.theme-toggle:hover, .theme-toggle:focus-visible { color: var(--accent); border-color: var(--accent); }

@media (max-width: 720px) {
  .nav-links { display: none; }
}

/* ---------- Hero (index only) ---------- */
.hero { padding: 96px 0 72px; }
.hero-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.15fr;
  gap: 48px;
  align-items: center;
}
.hero-content { min-width: 0; }
.hero-image {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 3 / 2;
}
.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.hero-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, var(--bg) 0%, transparent 42%);
  pointer-events: none;
}
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero-image { order: 2; aspect-ratio: 16 / 10; }
  .hero-image::after { background: linear-gradient(to bottom, var(--bg) 0%, transparent 30%); }
}
.eyebrow {
  font-family: var(--font-mono);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 24px;
}
.hero h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.3rem, 5.4vw, 4rem);
  line-height: 1.12;
  max-width: 16ch;
  margin-bottom: 28px;
  letter-spacing: -0.01em;
}
.hero-sub {
  max-width: 52ch;
  margin-bottom: 40px;
}
.hero-sub p {
  font-size: 1.1rem;
  color: var(--text-muted);
}
.hero-sub p + p {
  margin-top: 14px;
}
.cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: var(--bg);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 14px 24px;
  border-radius: var(--radius);
  text-decoration: none;
  transition: transform var(--transition), opacity var(--transition);
}
.cta:hover { transform: translateY(-2px); opacity: 0.92; }

/* ---------- Manifesto ---------- */
.manifesto {
  padding: 56px 0 88px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.manifesto p {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.35rem;
  line-height: 1.5;
  max-width: 62ch;
  color: var(--text);
}

/* ---------- Sections ---------- */
.section { padding: 88px 0; }
.section-head { margin-bottom: 44px; }
.section-label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2rem, 4.4vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--text);
}

/* ---------- Advanced (lightweight list, not sold as cards) ---------- */
.advanced-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.advanced-list a, .advanced-list .advanced-item-soon {
  display: block;
  font-size: 0.98rem;
  color: var(--text);
  text-decoration: none;
  padding: 12px 2px;
  border-bottom: 1px solid var(--border);
  transition: color var(--transition);
}
.advanced-list > :first-child { padding-top: 0; }
.advanced-list > :last-child { border-bottom: none; }
.advanced-list a:hover, .advanced-list a:focus-visible { color: var(--accent); }
.advanced-list .advanced-item-soon { color: var(--text-faint); cursor: default; }
.advanced-list .advanced-sub {
  display: block;
  font-size: 0.8rem;
  color: var(--text-faint);
  font-weight: 400;
  margin-top: 3px;
}

/* ---------- Advanced sub-page header (full-width, larger h1) ---------- */
.page-header.advanced-page-header h1 {
  font-size: clamp(2.4rem, 6vw, 4rem);
  max-width: none;
}

/* ---------- Fixed bottom section nav (Advanced sub-pages) ---------- */
.lb-bottom-nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 40;
  display: flex;
  justify-content: center;
  gap: 4px;
  padding: 12px 20px calc(12px + env(safe-area-inset-bottom, 0px));
  background: var(--nav-bg);
  backdrop-filter: blur(8px);
  border-top: 1px solid var(--border);
}
.lb-bottom-nav a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-faint);
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 999px;
  transition: color var(--transition), background var(--transition);
}
.lb-bottom-nav a:hover { color: var(--text); }
.lb-bottom-nav a.active { color: var(--accent); background: var(--accent-soft); }

/* ---------- Algae page graphics ---------- */
.algae-billboard {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  text-align: center;
  color: var(--accent);
  line-height: 1.3;
  max-width: 20ch;
  margin: 40px auto 8px;
}
.algae-billboard-eq { color: var(--text-faint); font-weight: 400; margin: 0 6px; }

.triangle-wrap { display: flex; justify-content: center; margin: 32px 0 12px; }
.triangle-graphic { width: 100%; max-width: 320px; height: auto; overflow: visible; }
.triangle-label {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  fill: var(--text);
}

.severity-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin: 28px 0 12px;
  max-width: 68ch;
}
.severity-col {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-top: 2px solid var(--accent);
  border-radius: var(--radius);
  padding: 16px 18px;
}
.severity-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
}
.severity-steps { font-weight: 700; color: var(--text); font-size: 1rem; }
.severity-col.sev-low { background: color-mix(in srgb, var(--accent) 12%, var(--card-bg)); border-top-color: var(--accent); }
.severity-col.sev-low .severity-label, .severity-col.sev-low .severity-steps { color: var(--accent); }
.severity-col.sev-moderate { background: color-mix(in srgb, var(--badge-gold) 12%, var(--card-bg)); border-top-color: var(--badge-gold); }
.severity-col.sev-moderate .severity-label, .severity-col.sev-moderate .severity-steps { color: var(--badge-gold); }
.severity-col.sev-significant { background: color-mix(in srgb, #D64545 12%, var(--card-bg)); border-top-color: #D64545; }
.severity-col.sev-significant .severity-label, .severity-col.sev-significant .severity-steps { color: #D64545; }
.escalation-row {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  max-width: 68ch;
  padding-top: 4px;
}
.escalation-row div { font-size: 0.88rem; color: var(--text-muted); }
.esc-arrow { color: var(--text-faint); margin: 0 4px; }
.esc-step { color: var(--accent); font-weight: 700; }

.escalation-block {
  margin-top: 32px;
  padding-top: 28px;
  border-top: 1px dashed var(--border-strong);
}
.escalation-heading {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 0;
}

.apt-guide {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin: 20px 0;
  max-width: 68ch;
}
.apt-col h4 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  margin: 0 0 12px;
}
.apt-row { margin-bottom: 14px; }
.apt-row:last-child { margin-bottom: 0; }
.apt-row-label { display: block; font-weight: 700; color: var(--text); font-size: 0.92rem; margin-bottom: 4px; }
.apt-row p { color: var(--text-muted); font-size: 0.9rem; line-height: 1.55; margin: 0; }

/* ---------- Home cards ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.card {
  position: relative;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-top: 2px solid var(--accent);
  border-radius: var(--radius);
  padding: 28px 26px 26px;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  transition: transform var(--transition), border-color var(--transition);
}
.card:hover, .card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--border-strong);
  border-top-color: var(--accent);
}
.card-icon { font-size: 1.5rem; margin-bottom: 18px; }
.card-title {
  font-size: 1.08rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 12px;
  color: var(--text);
}
.card-sub {
  font-size: 0.82rem;
  color: var(--text-faint);
  line-height: 1.5;
  margin: 0;
}
.card-desc {
  color: var(--text-muted);
  font-size: 0.94rem;
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}
.card-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-faint);
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

/* ---- Feature card (Resources) ---- */
.card-feature {
  padding: 40px 40px 36px;
  cursor: default;
}
.card-feature:hover, .card-feature:focus-visible {
  border-color: var(--border);
  border-top-color: var(--accent);
}
.card-lead {
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.65;
  max-width: 64ch;
  margin: 0 0 24px;
}
.card-quote {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.35rem;
  line-height: 1.5;
  color: var(--text);
  max-width: 52ch;
  margin: 0 0 16px;
}
.card-feature .card-desc {
  margin-bottom: 28px;
  max-width: 56ch;
  flex-grow: 0;
}
.card-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 13px 22px;
  text-decoration: none;
  transition: border-color var(--transition), color var(--transition), background var(--transition), transform var(--transition);
}
.chip:hover, .chip:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
  transform: translateY(-2px);
}

.badge {
  position: absolute;
  top: -11px;
  left: 24px;
  background: var(--accent);
  color: var(--bg);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 4px 10px;
  border-radius: var(--radius);
}
.badge-blue {
  background: var(--badge-blue);
}
.badge-gold {
  background: var(--badge-gold);
}
.badge-orange {
  background: var(--badge-orange);
}

/* ---------- Media Calculator ---------- */
.calc-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 20px;
  margin: 24px 0 36px;
}
.calc-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.calc-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.calc-select {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  color: var(--text);
  background: var(--card-bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 9px 14px;
  cursor: pointer;
}
.calc-select:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 2px; }
.calc-reverse-btn {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  background: var(--card-bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 10px 18px;
  cursor: pointer;
  align-self: flex-end;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}
.calc-reverse-btn:hover { border-color: var(--accent); color: var(--accent); }
.calc-reverse-btn[aria-pressed="true"] {
  color: var(--bg);
  background: var(--accent);
  border-color: var(--accent);
}

.filter-diagram-wrap {
  display: flex;
  align-items: stretch;
  gap: 18px;
  max-width: 440px;
}
.flow-arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 26px;
  flex-shrink: 0;
}
.flow-arrow svg {
  color: var(--accent);
  transition: transform var(--transition);
}
.flow-arrow.flow-reversed svg { transform: rotate(180deg); }
.flow-caption {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  writing-mode: vertical-rl;
  margin-top: 10px;
}

.filter-stack {
  flex: 1;
  display: flex;
  flex-direction: column;
  border: 2px solid var(--border-strong);
  border-radius: var(--radius);
  overflow: hidden;
  transition: opacity 150ms ease;
  background: var(--card-bg);
}
.filter-basket {
  padding: 16px 20px;
  border-bottom: 1px dashed var(--border);
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.filter-basket:last-child { border-bottom: none; }
.basket-type {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 500;
}
.basket-fill {
  font-size: 0.9rem;
  color: var(--text);
}
.basket-mechanical { background: var(--basket-gold-bg); }
.basket-mechanical .basket-type { color: var(--badge-gold); }
.basket-biological { background: var(--basket-accent-bg); }
.basket-biological .basket-type { color: var(--accent); }
.basket-chemical { background: var(--basket-blue-bg); }
.basket-chemical .basket-type { color: var(--badge-blue); }

@media (max-width: 480px) {
  .filter-diagram-wrap { max-width: 100%; }
  .calc-reverse-btn { align-self: flex-start; }
}

/* ---------- Announcements (Underwater Editorial) ---------- */
.announcements {
  --water: #0D2B2E;
  --water-deep: #081C1E;
  --foam: #EAF3F1;
  --seafoam: #6FC9B8;
  --gold: #D9A441;
  background: var(--water);
  padding: 0;
}
.announce-hero {
  position: relative;
  min-height: 380px;
  display: flex;
  align-items: flex-end;
}
.announce-hero img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.announce-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(8,28,30,.3) 0%, rgba(8,28,30,.72) 55%, var(--water) 100%);
}
.announce-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 1080px;
  margin: 0 auto;
  width: 100%;
  padding: 0 40px 44px;
}
.announce-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--seafoam);
  margin: 0 0 14px;
}
.announce-hero h2 {
  font-family: 'Fraunces', var(--font-display), serif;
  font-style: italic;
  font-weight: 500;
  font-size: 2.4rem;
  line-height: 1.1;
  margin: 0;
  max-width: 18ch;
  color: #fff;
}
.announce-body {
  max-width: 1080px;
  margin: 0 auto;
  padding: 48px 40px 0;
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 48px;
}
.announce-body p {
  font-family: 'Work Sans', var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: #CFE3DF;
  margin: 0 0 18px;
  max-width: 56ch;
}
.announce-body p a { color: var(--gold); text-decoration-color: rgba(217,164,65,.4); }
.announce-cta {
  display: inline-block;
  font-family: 'Work Sans', var(--font-body);
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--gold);
  margin: 0;
  border-bottom: 2px solid #D64545;
  padding-bottom: 4px;
}
.announce-facts {
  display: flex;
  flex-direction: column;
  gap: 20px;
  border-left: 1px solid rgba(255,255,255,.15);
  padding-left: 28px;
}
.af-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--seafoam);
  margin-bottom: 6px;
}
.af-value {
  font-family: 'Fraunces', var(--font-display), serif;
  font-size: 1.2rem;
  color: #fff;
  line-height: 1.4;
}
.af-value-sm {
  display: block;
  font-family: 'Work Sans', var(--font-body);
  font-size: 0.88rem;
  color: #CFE3DF;
  line-height: 1.5;
}
.af-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.af-list li {
  font-family: 'Work Sans', var(--font-body);
  font-size: 0.88rem;
  color: #CFE3DF;
  line-height: 1.5;
  position: relative;
  padding-left: 14px;
}
.af-list li::before { content: "·"; position: absolute; left: 0; color: var(--seafoam); font-weight: 700; }
.hand-mark {
  display: inline-block;
  border-bottom: 4px solid #D64545;
  padding-bottom: 2px;
}
.announce-strip {
  border-top: 1px solid rgba(255,255,255,.12);
  margin-top: 40px;
  max-width: 1080px;
  margin-left: auto;
  margin-right: auto;
  padding: 40px 40px 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}
.announce-strip h3 {
  font-family: 'Fraunces', var(--font-display), serif;
  font-weight: 600;
  font-size: 1.15rem;
  margin: 0 0 14px;
  color: #fff;
}
.announce-list {
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin: 0 0 14px;
  padding: 0;
}
.announce-list li {
  font-family: 'Work Sans', var(--font-body);
  font-size: 0.9rem;
  color: #CFE3DF;
  line-height: 1.6;
  position: relative;
  padding-left: 16px;
}
.announce-list li::before { content: "·"; position: absolute; left: 0; color: var(--seafoam); font-weight: 700; }
.announce-tag { color: var(--seafoam); font-weight: 500; }
.announce-strip p {
  font-family: 'Work Sans', var(--font-body);
  font-size: 0.9rem;
  color: #9FBDB8;
  line-height: 1.65;
  margin: 0;
  max-width: 48ch;
}
.announce-note { color: #9FBDB8; font-size: 0.85em; }
.announce-highlight { margin-top: 14px; }
.announce-highlight mark {
  background: rgba(217, 164, 65, 0.22);
  color: #fff;
  padding: 3px 7px;
  border-radius: 3px;
}

@media (max-width: 760px) {
  .announce-hero-inner { padding: 0 20px 32px; }
  .announce-hero h2 { font-size: 1.8rem; }
  .announce-body { grid-template-columns: 1fr; padding: 32px 20px 0; gap: 28px; }
  .announce-facts { border-left: none; padding-left: 0; border-top: 1px solid rgba(255,255,255,.15); padding-top: 20px; }
  .announce-strip { grid-template-columns: 1fr; padding: 32px 20px; gap: 28px; }
}

/* ---------- Coming Soon ---------- */
.coming-soon { background: var(--bg-soft); border-top: 1px solid var(--border); padding: 44px 0; }
.coming-soon .section-head { margin-bottom: 16px; }
.soon-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0 32px;
}
.soon-list li {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 6px 0;
  border-bottom: 1px dashed var(--border-strong);
  font-size: 0.8rem;
  color: var(--text-muted);
}
.soon-list li::before {
  content: "";
  width: 12px;
  height: 12px;
  border-radius: 3px;
  border: 1.5px solid var(--border-strong);
  background: transparent;
  flex-shrink: 0;
}
.soon-list li.done {
  text-decoration: line-through;
  color: var(--text-faint);
}
.soon-list li.done::before {
  content: "✓";
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
  font-size: 8px;
  font-weight: 700;
  line-height: 1;
}

/* ---------- Footer ---------- */
footer {
  padding: 48px 0 64px;
  border-top: 1px solid var(--border);
}
footer .fine { color: var(--text-faint); font-size: 0.88rem; max-width: 60ch; }

/* ==========================================================================
   Inner-page components
   ========================================================================== */

.page-header { padding: 56px 0 48px; border-bottom: 1px solid var(--border); }
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-decoration: none;
  margin-bottom: 28px;
  transition: color var(--transition), gap var(--transition);
}
.back-link:hover, .back-link:focus-visible { color: var(--accent); gap: 10px; }
.page-header h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  line-height: 1.18;
  max-width: 20ch;
  margin-bottom: 20px;
}
.page-intro { color: var(--text-muted); font-size: 1.02rem; max-width: 64ch; }
.page-intro p + p { margin-top: 14px; }
.read-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 18px;
}

.content-section { padding: 56px 0; border-bottom: 1px solid var(--border); }
.content-section:last-of-type { border-bottom: none; }
.content-section h2 {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 8px;
}
.content-section h3 {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1.15rem;
  margin: 32px 0 14px;
  color: var(--text);
}
.content-section h3:first-of-type { margin-top: 0; }
.section-sub {
  color: var(--text-faint);
  font-size: 0.92rem;
  margin-bottom: 28px;
  max-width: 60ch;
}

.lede {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.15rem;
  color: var(--text);
  max-width: 60ch;
  margin-bottom: 6px;
  line-height: 1.5;
}

/* ---- Tip lists (checkmark bullets, can nest) ---- */
.tip-list { display: flex; flex-direction: column; gap: 14px; max-width: 68ch; }
.tip-list > li {
  position: relative;
  padding-left: 26px;
  color: var(--text);
  font-size: 0.98rem;
  line-height: 1.6;
}
.tip-list > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--accent);
}
.tip-list .sub-list {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.tip-list .sub-list > li {
  position: relative;
  padding-left: 20px;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.55;
}
.tip-list .sub-list > li::before {
  content: "–";
  position: absolute;
  left: 0;
  color: var(--text-faint);
}
.tip-list strong { color: var(--text); font-weight: 700; }

/* ---- Numbered steps (with connecting line) ---- */
.steps {
  display: flex;
  flex-direction: column;
  max-width: 68ch;
}
.step {
  position: relative;
  padding: 0 0 28px 44px;
}
.step:last-child { padding-bottom: 0; }
.step::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 30px;
  bottom: 0;
  width: 1px;
  background: var(--border-strong);
}
.step:last-child::before { display: none; }
.step-num {
  position: absolute;
  left: 0;
  top: 0;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--accent-soft);
  border: 1px solid var(--border-strong);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.step-title { font-weight: 700; margin-bottom: 6px; color: var(--text); }
.step-desc { color: var(--text-muted); font-size: 0.94rem; line-height: 1.6; }

/* ---- Callouts ---- */
.callout {
  background: var(--basket-accent-bg);
  border-left: 2px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 18px 22px;
  margin: 24px 0;
  max-width: 68ch;
}
.callout-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}
.callout-muted {
  background: var(--bg-soft);
  border-left-color: var(--border-strong);
}
.callout-gold {
  background: var(--basket-gold-bg);
  border-left-color: var(--badge-gold);
}
.callout p, .callout li {
  font-size: 0.94rem;
  color: var(--text);
  line-height: 1.6;
}
.callout p.callout-label { color: var(--accent); }
.callout-muted p.callout-label { color: var(--text-faint); }
.callout ul { display: flex; flex-direction: column; gap: 6px; }
.callout li { position: relative; padding-left: 16px; }
.callout li::before { content: "·"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }

/* ---- Link grid (equipment / product cards) ---- */
.link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}
.link-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  text-decoration: none;
  font-size: 0.9rem;
  color: var(--text);
  transition: transform var(--transition), border-color var(--transition);
}
.link-card::after { content: "↗"; font-size: 0.75em; color: var(--text-faint); margin: 0; flex-shrink: 0; }
.link-card:hover, .link-card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--accent);
}

/* ---- Link list (lines with inline links / mixed text) ---- */
.link-list { display: flex; flex-direction: column; gap: 12px; max-width: 68ch; }
.link-list > li {
  position: relative;
  padding-left: 18px;
  font-size: 0.95rem;
  color: var(--text);
  line-height: 1.6;
}
.link-list > li::before { content: "—"; position: absolute; left: 0; color: var(--text-faint); }
.link-list .item-note { color: var(--text-muted); font-size: 0.88rem; display: block; margin-top: 2px; }

/* ---- Channel / resource grid ---- */
.channel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 10px;
}
.channel-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  text-decoration: none;
  font-size: 0.87rem;
  color: var(--text);
  transition: transform var(--transition), border-color var(--transition);
}
.channel-chip::before {
  content: "";
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  border-radius: 3px;
  background-color: #e33;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 10'%3E%3Cpath d='M2.5 1.3v7.4l6-3.7z' fill='white'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 7px 8px;
}
.channel-chip::after { content: "↗"; font-size: 0.75em; color: var(--text-faint); margin-left: auto; }
.channel-chip:hover, .channel-chip:focus-visible { transform: translateY(-2px); border-color: var(--accent); }
.channel-chip.has-note { position: relative; }
.chip-note-dot {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--badge-gold);
  border: 1.5px solid var(--card-bg);
}
.chip-tooltip {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 9px);
  transform: translateX(-50%) translateY(4px);
  width: max-content;
  max-width: 220px;
  background: var(--card-bg);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  padding: 10px 12px;
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 400;
  line-height: 1.5;
  color: var(--text-muted);
  white-space: normal;
  text-align: left;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.28);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 150ms ease, transform 150ms ease;
  z-index: 20;
}
.chip-tooltip::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--border-strong);
}
.channel-chip.has-note:hover .chip-tooltip,
.channel-chip.has-note:focus-visible .chip-tooltip,
.channel-chip.has-note.tip-open .chip-tooltip {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}
.channel-chip.chip-web::before {
  background-color: var(--badge-blue);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 10'%3E%3Ccircle cx='5' cy='5' r='3.6' fill='none' stroke='white' stroke-width='0.9'/%3E%3Cpath d='M1.4 5h7.2M5 1.4v7.2M2.6 2.6c1.7 1.7 1.7 3.1 0 4.8M7.4 2.6c-1.7 1.7-1.7 3.1 0 4.8' fill='none' stroke='white' stroke-width='0.7'/%3E%3C/svg%3E");
  background-size: 9px 9px;
}
.channel-chip.chip-group::before {
  background-color: #1877F2;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 10'%3E%3Ccircle cx='3.8' cy='4.1' r='2' fill='white'/%3E%3Ccircle cx='6.5' cy='5' r='1.6' fill='white' opacity='.65'/%3E%3C/svg%3E");
  background-size: 8px 8px;
}

/* ---- Contest Winners (gold standard treatment) ---- */
.contest-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}
.contest-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-top: 2px solid var(--badge-gold);
  border-radius: 10px;
  padding: 18px 20px;
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
  transition: transform var(--transition), border-color var(--transition);
}
.contest-card .contest-emoji { flex-shrink: 0; font-size: 1.2rem; line-height: 1; }
.contest-card::after { content: "↗"; margin-left: auto; font-size: 0.75em; color: var(--text-faint); }
.contest-card:hover, .contest-card:focus-visible { transform: translateY(-3px); border-color: var(--badge-gold); }

/* ---- Curated feature callout (Resources page) ---- */
.res-feature {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin-bottom: 16px;
}
.res-feature.gold { border-left-color: var(--badge-gold); }
.res-feature-tag {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 6px;
}
.res-feature.gold .res-feature-tag { color: var(--badge-gold); }
.res-feature h3 { font-size: 1.05rem; margin: 0 0 8px; }
.res-feature h3 a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 9px;
}
.res-feature.gold h3 a { border-bottom-color: var(--badge-gold); }
.res-feature p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.65; margin: 0; max-width: 62ch; }
.res-feature-emoji { font-size: 1.3rem; line-height: 1; flex-shrink: 0; }
.feature-badge {
  display: inline-flex;
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 4px;
  background-repeat: no-repeat;
  background-position: center;
}
.feature-badge.video {
  background-color: #e33;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 10'%3E%3Cpath d='M2.5 1.3v7.4l6-3.7z' fill='white'/%3E%3C/svg%3E");
  background-size: 9px 10px;
}
.feature-badge.website {
  background-color: var(--badge-blue);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 10'%3E%3Ccircle cx='5' cy='5' r='3.6' fill='none' stroke='white' stroke-width='0.9'/%3E%3Cpath d='M1.4 5h7.2M5 1.4v7.2M2.6 2.6c1.7 1.7 1.7 3.1 0 4.8M7.4 2.6c-1.7 1.7-1.7 3.1 0 4.8' fill='none' stroke='white' stroke-width='0.7'/%3E%3C/svg%3E");
  background-size: 11px 11px;
}

/* ---- Stat tiles ---- */
.stat-row { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 28px; }
.stat-tile {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-top: 2px solid var(--accent);
  border-radius: var(--radius);
  padding: 20px 24px;
  min-width: 160px;
  flex: 1;
}
.stat-tile .num {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
}
.stat-tile .label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
}

/* ---- Gear grid (equipment explainer cards) ---- */
.gear-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
}
.gear-card {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-left: 2px solid var(--accent);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.gear-icon { font-size: 1.3rem; flex-shrink: 0; }
.gear-card h3 {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text);
  margin: 0;
}
a.gear-card {
  text-decoration: none;
  transition: transform var(--transition), border-color var(--transition);
}
a.gear-card:hover, a.gear-card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--border-strong);
}
a.gear-card h3 { text-decoration: underline; text-decoration-color: var(--border-strong); text-underline-offset: 3px; }
a.gear-card:hover h3, a.gear-card:focus-visible h3 { text-decoration-color: var(--accent); }

/* ---- Schedule table ---- */
.table-wrap { overflow-x: auto; margin: 8px 0 28px; }
.schedule-table { width: 100%; border-collapse: collapse; max-width: 68ch; font-size: 0.92rem; }
.schedule-table th, .schedule-table td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}
.schedule-table th {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  font-weight: 500;
}
.schedule-table td { color: var(--text); }
.schedule-table tr:last-child td { border-bottom: none; }

/* ---- Current-schedule strip ---- */
.current-schedule {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  align-items: center;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text);
  margin: 8px 0 28px;
  max-width: 68ch;
}
.current-schedule .cs-label { color: var(--text-faint); text-transform: uppercase; font-size: 0.7rem; letter-spacing: 0.06em; }

/* ---- Phase cards (water change schedule) ---- */
.phase-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.phase-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-top: 2px solid var(--accent);
  border-radius: var(--radius);
  padding: 24px;
}
.phase-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 6px;
}
.phase-card h3 { margin: 0 0 4px; font-size: 1.05rem; }
.phase-range { color: var(--text-faint); font-family: var(--font-mono); font-size: 0.78rem; margin-bottom: 16px; }
.phase-rules { display: flex; flex-direction: column; gap: 10px; }
.phase-rule {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-top: 1px solid var(--border);
  font-size: 0.88rem;
}
.phase-rule:first-child { border-top: none; padding-top: 0; }
.phase-rule .cond { color: var(--text-muted); }
.phase-rule .val { color: var(--text); font-weight: 500; text-align: right; }

/* ---- Week list (RODI totes / simple stacked list) ---- */
.plain-list { display: flex; flex-direction: column; gap: 10px; max-width: 68ch; }
.plain-list > li {
  position: relative;
  padding-left: 18px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}
.plain-list > li::before { content: "•"; position: absolute; left: 0; color: var(--accent); }
.plain-list > li strong { color: var(--text); font-weight: 700; }

/* ---- Category block wrapper (best-practices, resources) ---- */
.category { margin-bottom: 40px; }
.category:last-child { margin-bottom: 0; }
.category-title {
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 16px;
  color: var(--text);
}

/* ---- Scroll-triggered fade-ins ---- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Anchor scroll offset (lands below the sticky nav) ---- */
main[id], section[id] {
  scroll-margin-top: 130px;
}

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
  .wrap, .wrap-narrow { padding: 0 20px; }
  .nav-inner { padding: 16px 20px; }
  .hero { padding: 64px 0 48px; }
  .section, .content-section { padding: 48px 0; }
  .grid, .soon-list, .link-grid, .channel-grid, .phase-grid { grid-template-columns: 1fr; }
  footer { flex-direction: column; }
  .stat-row { flex-direction: column; }
  .phase-rule { flex-direction: column; gap: 2px; }
  .phase-rule .val { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
  .reveal { opacity: 1 !important; transform: none !important; }
}