:root {
  --d-bg: #07121e;
  --d-bg2: #0c1d2e;
  --d-bg3: #0f2236;
  --d-border: rgba(255, 255, 255, 0.07);
  --d-border2: rgba(255, 255, 255, 0.15);
  --d-text: #e8f0f8;
  --d-text2: rgba(232, 240, 248, 0.62);
  --d-text3: rgba(232, 240, 248, 0.35);
  --d-card: rgba(255, 255, 255, 0.04);
  --d-card-h: rgba(255, 255, 255, 0.07);
  --l-bg: #f4f8fb;
  --l-bg2: #ffffff;
  --l-bg3: #e8f1f8;
  --l-border: rgba(0, 0, 0, 0.08);
  --l-border2: rgba(0, 0, 0, 0.16);
  --l-text: #0c1e2e;
  --l-text2: #253e50;
  --l-text3: #5a7a8a;
  --l-card: #ffffff;
  --l-card-h: #f0f7fb;
  --accent: #1a9bb5;
  --accent2: #7dd3e8;
  --accent-dk: #0e6b8c;
  --wb: #2a7fc4;
  --wb2: #a8d4f0;
  --wb3: rgba(42, 127, 196, 0.18);
}
.sec-dark {
  background: var(--d-bg);
  --bg: var(--d-bg);
  --bg2: var(--d-bg2);
  --bg3: var(--d-bg3);
  --border: var(--d-border);
  --border2: var(--d-border2);
  --text: var(--d-text);
  --text2: var(--d-text2);
  --text3: var(--d-text3);
  --card: var(--d-card);
  --card-h: var(--d-card-h);
  color: var(--d-text);
  overflow: hidden;
}
.sec-light {
  background: var(--l-bg);
  --bg: var(--l-bg);
  --bg2: var(--l-bg2);
  --bg3: var(--l-bg3);
  --border: var(--l-border);
  --border2: var(--l-border2);
  --text: var(--l-text);
  --text2: var(--l-text2);
  --text3: var(--l-text3);
  --card: var(--l-card);
  --card-h: var(--l-card-h);
  color: var(--l-text);
  overflow: hidden;
}

.reveal {
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity 0.65s ease,
    transform 0.65s ease;
  width: 100%;
  box-sizing: border-box;
}
.reveal.animate {
  opacity: 0;
  transform: translateY(24px);
}
.reveal.animate.visible {
  opacity: 1;
  transform: translateY(0);
}
/* ── HERO ── */
.guide-hero {
  position: relative;
  height: 92vh;
  min-height: 580px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  background: #020a14;
}
.hero-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
  z-index: 0;
}
.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  opacity: 0.22;
  mix-blend-mode: screen;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(2, 10, 20, 0.1) 0%,
    rgba(2, 10, 20, 0.05) 25%,
    rgba(2, 10, 20, 0.55) 65%,
    rgba(2, 10, 20, 0.95) 100%
  );
  z-index: 2;
}
.hero-credit {
  position: absolute;
  bottom: 72px;
  right: 2rem;
  font-size: 10px;
  color: rgba(255, 255, 255, 0.3);
  z-index: 4;
  letter-spacing: 0.3px;
  font-family: 'DM Sans', sans-serif;
}
.hero-inner {
  position: relative;
  z-index: 3;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 2rem;
  width: 100%;
}
.hero-category {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: rgba(168, 212, 240, 0.9);
  margin-bottom: 0.6rem;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.8);
}
.hero-category-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--wb);
  box-shadow:
    0 0 0 4px rgba(42, 127, 196, 0.2),
    0 0 0 9px rgba(42, 127, 196, 0.07);
}
.hero-edition {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 1.8px;
  text-transform: uppercase;
  color: rgba(168, 212, 240, 0.6);
  margin-bottom: 0.9rem;
  display: flex;
  align-items: center;
  gap: 10px;
}
.hero-edition-pill {
  background: rgba(42, 127, 196, 0.18);
  border: 1px solid rgba(42, 127, 196, 0.35);
  border-radius: 20px;
  padding: 3px 12px;
  font-size: 11px;
  letter-spacing: 1.5px;
  color: rgba(168, 212, 240, 0.85);
}
.hero-title {
  font-family: 'Crimson Pro', serif;
  font-weight: 300;
  font-size: clamp(3rem, 7vw, 5.2rem);
  color: white;
  line-height: 1.03;
  margin-bottom: 0.5rem;
  letter-spacing: -0.5px;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.7);
}
.hero-title em {
  color: var(--wb2);
  font-style: italic;
}
.hero-title-answer {
  font-family: 'Crimson Pro', serif;
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 300;
  font-style: italic;
  color: rgba(168, 212, 240, 0.82);
  line-height: 1.2;
  margin-bottom: 0.65rem;
  letter-spacing: 0.1px;
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.7);
}
.hero-subtitle {
  font-family: 'Crimson Pro', serif;
  font-size: clamp(0.95rem, 2vw, 1.2rem);
  color: rgba(255, 255, 255, 0.42);
  font-weight: 300;
  font-style: italic;
  margin-bottom: 1.25rem;
  letter-spacing: 0.3px;
}
.hero-sub {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.75);
  font-weight: 300;
  max-width: 560px;
  line-height: 1.78;
  margin-bottom: 1.75rem;
}
.hero-badges {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}
.hbadge {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 5px 13px;
  border-radius: 20px;
  border: 1px solid;
  backdrop-filter: blur(8px);
}
.hb-bl {
  background: rgba(42, 127, 196, 0.18);
  color: #a8d4f0;
  border-color: rgba(42, 127, 196, 0.35);
}
.hb-co {
  background: rgba(167, 139, 250, 0.15);
  color: #c4b5fd;
  border-color: rgba(167, 139, 250, 0.3);
}
.hb-go {
  background: rgba(251, 191, 36, 0.12);
  color: #fde68a;
  border-color: rgba(251, 191, 36, 0.28);
}
.hb-gr {
  background: rgba(74, 222, 128, 0.12);
  color: #86efac;
  border-color: rgba(74, 222, 128, 0.28);
}
.wave {
  display: block;
  width: 100%;
  line-height: 0;
}

/* ══════════════════════════════════════════════
   STRATEGY 1 — SECTION-AWARE PROGRESS NAV
══════════════════════════════════════════════ */
.guide-nav-wrap {
  background: rgba(7, 18, 30, 0.97);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  position: sticky;
  top: 64px;
  z-index: 200;
}
.guide-nav {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  overflow-x: auto;
  scrollbar-width: none;
  padding: 0 2rem;
}
.guide-nav::-webkit-scrollbar {
  display: none;
}

.gnav {
  position: relative;
  padding: 0.9rem 1.4rem 0.75rem;
  font-size: 14px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color 0.2s;
  user-select: none;
  overflow: hidden;
}
.gnav:hover {
  color: rgba(255, 255, 255, 0.82);
}

/* The fill track — lives inside each nav item */
.gnav-fill {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--wb), var(--wb2));
  transition: width 0.12s linear;
  border-radius: 2px;
}

/* Completed state */
.gnav.done {
  color: rgba(255, 255, 255, 0.65);
}
.gnav.done .gnav-fill {
  width: 100%;
  opacity: 0.55;
}

/* Active state */
.gnav.active {
  color: white;
  font-weight: 500;
}
.gnav.active .gnav-fill {
  opacity: 1;
  animation: fill-pulse 2.2s ease-in-out infinite;
}

/* Pulse — breathes on the active fill to signal live progress */
@keyframes fill-pulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(168, 212, 240, 0);
  }
  50% {
    box-shadow: 0 0 6px 1px rgba(168, 212, 240, 0.35);
  }
}

/* Completion tick — appears when section is done */
.gnav-tick {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: rgba(42, 127, 196, 0.25);
  margin-left: 6px;
  opacity: 0;
  transform: scale(0.6);
  transition:
    opacity 0.3s ease,
    transform 0.3s ease;
  vertical-align: middle;
}
.gnav-tick svg {
  width: 8px;
  height: 8px;
}
.gnav.done .gnav-tick {
  opacity: 1;
  transform: scale(1);
}

/* ── SECTION BASE ── */
.sec {
  scroll-margin-top: 125px;
  overflow: hidden;
}
.sec-inner {
  max-width: 860px;
  margin: 0 auto;
  padding: 4rem 2.5rem;
  box-sizing: border-box;
  width: 100%;
}
.sec-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
}
.sec-icon {
  width: 50px;
  height: 50px;
  border-radius: 14px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid;
}
.sec-icon svg {
  width: 25px;
  height: 25px;
}
.sec-eye {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 4px;
}
.sec-title {
  font-family: 'Crimson Pro', serif;
  font-size: 28px;
  font-weight: 300;
  color: var(--text);
  line-height: 1.1;
}
.ey-whale {
  color: var(--wb);
}
.ey-teal {
  color: #7dd3e8;
}
.ey-amber {
  color: #fbbf24;
}
.ey-green {
  color: #4ade80;
}
.ey-purple {
  color: #c4b5fd;
}

/* ── HOOK ── */
.hook-body {
  font-family: 'Crimson Pro', serif;
  font-size: 1.35rem;
  font-weight: 300;
  line-height: 1.9;
  color: var(--text);
  max-width: 640px;
  width: 100%;
}
.hook-body p {
  margin-bottom: 1.5rem;
}
.hook-body p:last-child {
  margin-bottom: 0;
}
.pull-line {
  font-size: 1.55rem;
  font-style: italic;
  color: var(--wb2);
  font-family: 'Crimson Pro', serif;
  font-weight: 300;
  line-height: 1.55;
  border-left: 2px solid rgba(168, 212, 240, 0.35);
  padding-left: 1.5rem;
  margin: 2.25rem 0;
  max-width: 600px;
  width: 100%;
  box-sizing: border-box;
}

/* ── SCIENCE ── */
.fact-body {
  font-size: 17px;
  line-height: 1.85;
  color: var(--text2);
  width: 100%;
  max-width: 640px;
  display: block;
  position: relative;
}
.fact-body p {
  margin-bottom: 1.3rem;
}
.fact-body p:last-child {
  margin-bottom: 0;
}
.fact-body em {
  font-style: italic;
  color: var(--text);
}

.fact-divider {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin: 2.5rem 0;
}
.fact-divider-line {
  flex: 1;
  height: 1px;
  background: var(--border);
}
.fact-divider-mark {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--text3);
  white-space: nowrap;
}

.depth-profile {
  background: rgba(14, 107, 140, 0.04);
  border: 1px solid rgba(14, 107, 140, 0.14);
  border-radius: 16px;
  padding: 1.75rem;
  margin: 2rem 0;
}
.dp-title {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--l-text3);
  margin-bottom: 1.35rem;
}
.dp-bars {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.dp-row {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.dp-label {
  font-size: 13px;
  color: var(--l-text2);
  font-weight: 500;
  width: 190px;
  flex-shrink: 0;
  line-height: 1.3;
}
.dp-bar-track {
  flex: 1;
  height: 8px;
  background: rgba(14, 107, 140, 0.08);
  border-radius: 4px;
  overflow: hidden;
}
.dp-bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 1.5s ease-out;
  width: 0;
}
.dp-val {
  font-size: 13px;
  font-weight: 500;
  color: var(--l-text2);
  width: 58px;
  text-align: right;
  flex-shrink: 0;
  font-family: 'Crimson Pro', serif;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 1.75rem 0;
}
.stat-card {
  background: rgba(42, 127, 196, 0.06);
  border: 1px solid rgba(42, 127, 196, 0.15);
  border-radius: 12px;
  padding: 1.2rem 1.25rem;
}
.stat-card.lv {
  background: var(--l-card);
  border-color: var(--l-border);
}
.stat-val {
  font-size: 1.55rem;
  font-family: 'Crimson Pro', serif;
  font-weight: 300;
  color: var(--wb);
  line-height: 1;
}
.sec-light .stat-val {
  color: #0e6b8c;
}
.stat-label {
  font-size: 12px;
  color: var(--text3);
  margin-top: 5px;
  line-height: 1.45;
}

.highlight-band {
  background: linear-gradient(135deg, #07121e, #0a1e30);
  border: 1px solid rgba(42, 127, 196, 0.12);
  border-radius: 14px;
  padding: 1.6rem 1.75rem;
  margin: 1.75rem 0;
}
.highlight-band.light-var {
  background: linear-gradient(135deg, #eaf4fb, #f4f8fb);
  border-color: rgba(14, 107, 140, 0.12);
}
.hb-eye {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: rgba(168, 212, 240, 0.6);
  margin-bottom: 0.5rem;
}
.hb-eye.dark-label {
  color: rgba(14, 107, 140, 0.7);
}
.hb-text {
  font-family: 'Crimson Pro', serif;
  font-size: 1.15rem;
  font-weight: 300;
  font-style: italic;
  color: rgba(232, 240, 248, 0.78);
  line-height: 1.75;
}
.hb-text.dark-text {
  color: rgba(12, 30, 46, 0.75);
}

/* ── DIVER'S ANGLE ── */
.diver-angle {
  border-left: 3px solid rgba(42, 127, 196, 0.45);
  background: rgba(42, 127, 196, 0.04);
  border-radius: 0 12px 12px 0;
  padding: 1.25rem 1.5rem;
  margin: 1.75rem 0;
}
.da-eye {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: rgba(168, 212, 240, 0.6);
  margin-bottom: 0.45rem;
}
.da-text {
  font-size: 16px;
  color: var(--text2);
  line-height: 1.8;
}

.conservation-note {
  background: rgba(74, 222, 128, 0.04);
  border: 1px solid rgba(74, 222, 128, 0.13);
  border-radius: 14px;
  padding: 1.5rem 1.6rem;
  margin-top: 1.75rem;
}
.con-title {
  font-size: 14px;
  font-weight: 500;
  color: #86efac;
  margin-bottom: 0.6rem;
}
.con-body {
  font-size: 15px;
  color: var(--text2);
  line-height: 1.75;
}

/* ── THE SOCIETY ── */
.brain-band {
  background: rgba(167, 139, 250, 0.04);
  border: 1px solid rgba(167, 139, 250, 0.14);
  border-radius: 14px;
  padding: 1.6rem 1.75rem;
  margin: 1.75rem 0;
}
.bb-eye {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: rgba(196, 181, 253, 0.6);
  margin-bottom: 0.5rem;
}
.bb-head {
  font-family: 'Crimson Pro', serif;
  font-size: 1.35rem;
  font-weight: 400;
  color: #c4b5fd;
  margin-bottom: 0.65rem;
  line-height: 1.25;
}
.bb-body {
  font-size: 15px;
  color: var(--text2);
  line-height: 1.8;
}

.closing-band {
  background: linear-gradient(135deg, #07121e, #0c1c2e);
  border: 1px solid rgba(168, 212, 240, 0.12);
  border-radius: 14px;
  padding: 1.85rem 2rem;
  margin: 2rem 0 0;
}
.cb-text {
  font-family: 'Crimson Pro', serif;
  font-size: 1.25rem;
  font-weight: 300;
  font-style: italic;
  color: rgba(232, 240, 248, 0.75);
  line-height: 1.85;
  margin: 0;
}
.cb-text strong {
  font-style: normal;
  font-weight: 400;
  color: var(--wb2);
}
.cb-space {
  margin-top: 1.1rem;
}
.cb-final {
  margin-top: 1.4rem;
  color: rgba(232, 240, 248, 0.95);
  font-size: 1.32rem;
  border-top: 1px solid rgba(168, 212, 240, 0.1);
  padding-top: 1.35rem;
}

/* ══════════════════════════════════════════════
   STRATEGY 3 — EXPANDABLE DEEP DIVES
══════════════════════════════════════════════ */
.deep-dive {
  margin: 1.5rem 0;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(42, 127, 196, 0.2);
}
.sec-light .deep-dive {
  border-color: rgba(14, 107, 140, 0.18);
}

/* The toggle trigger */
.dd-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.35rem;
  cursor: pointer;
  background: rgba(42, 127, 196, 0.06);
  transition: background 0.2s;
  user-select: none;
  gap: 1rem;
}
.sec-light .dd-trigger {
  background: rgba(14, 107, 140, 0.05);
}
.dd-trigger:hover {
  background: rgba(42, 127, 196, 0.11);
}
.sec-light .dd-trigger:hover {
  background: rgba(14, 107, 140, 0.09);
}

.dd-trigger-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: 1;
  min-width: 0;
}

.dd-badge {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 1.8px;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: 20px;
  white-space: nowrap;
  flex-shrink: 0;
  background: rgba(42, 127, 196, 0.18);
  color: var(--wb2);
  border: 1px solid rgba(42, 127, 196, 0.28);
}
.sec-light .dd-badge {
  background: rgba(14, 107, 140, 0.1);
  color: #0e6b8c;
  border-color: rgba(14, 107, 140, 0.2);
}

.dd-label {
  font-size: 14px;
  font-weight: 500;
  color: rgba(232, 240, 248, 0.75);
  line-height: 1.3;
}
.sec-light .dd-label {
  color: var(--l-text2);
}

.dd-summary {
  font-size: 13px;
  color: var(--d-text3);
  line-height: 1.5;
  margin-top: 2px;
}
.sec-light .dd-summary {
  color: var(--l-text3);
}

.dd-arrow {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border-radius: 50%;
  background: rgba(42, 127, 196, 0.1);
  border: 1px solid rgba(42, 127, 196, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  transition:
    transform 0.3s ease,
    background 0.2s;
}
.sec-light .dd-arrow {
  background: rgba(14, 107, 140, 0.07);
  border-color: rgba(14, 107, 140, 0.18);
}
.dd-arrow svg {
  width: 12px;
  height: 12px;
  transition: transform 0.3s ease;
}
.deep-dive.open .dd-arrow {
  background: rgba(42, 127, 196, 0.2);
}
.deep-dive.open .dd-arrow svg {
  transform: rotate(180deg);
}

/* The collapsible body */
.dd-body {
  max-height: 0;
  overflow: hidden;
  transition:
    max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1),
    opacity 0.3s ease;
  opacity: 0;
}
.deep-dive.open .dd-body {
  max-height: 1200px;
  opacity: 1;
}

.dd-body-inner {
  padding: 1.4rem 1.35rem 1.5rem;
  border-top: 1px solid rgba(42, 127, 196, 0.12);
}
.sec-light .dd-body-inner {
  border-top-color: rgba(14, 107, 140, 0.1);
}

/* Steps inside deep dive */
.dd-steps {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-top: 0.25rem;
}
.dd-step {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  font-size: 15px;
  color: var(--text2);
  line-height: 1.65;
}
.dd-step-num {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(42, 127, 196, 0.12);
  border: 1px solid rgba(42, 127, 196, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 500;
  color: var(--wb2);
  flex-shrink: 0;
  margin-top: 2px;
}
.sec-light .dd-step-num {
  background: rgba(14, 107, 140, 0.08);
  border-color: rgba(14, 107, 140, 0.2);
  color: #0e6b8c;
}

.dd-prose {
  font-size: 15px;
  color: var(--text2);
  line-height: 1.8;
}
.dd-prose p {
  margin-bottom: 0.85rem;
}
.dd-prose p:last-child {
  margin-bottom: 0;
}

/* ── SECTION IMAGES ── */
.sec-img-wrap {
  margin: 2.5rem 0;
  border-radius: 14px;
  overflow: hidden;
  position: relative;
}
.sec-img-wrap img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}
.sec-img-caption {
  font-size: 12px;
  color: var(--text3);
  line-height: 1.55;
  padding: 0.75rem 1rem 0.6rem;
  background: var(--card);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.sec-img-caption-text {
  flex: 1;
}
.sec-img-credit {
  font-size: 11px;
  color: var(--text3);
  opacity: 0.7;
  white-space: nowrap;
  letter-spacing: 0.2px;
}
.edition-meta {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  align-items: center;
  margin-top: 2rem;
}
.em-pill {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.5px;
  padding: 4px 12px;
  border-radius: 20px;
  border: 1px solid;
}
.em-bio {
  background: rgba(74, 222, 128, 0.08);
  color: #86efac;
  border-color: rgba(74, 222, 128, 0.18);
}
.em-num {
  background: rgba(42, 127, 196, 0.1);
  color: var(--wb2);
  border-color: rgba(42, 127, 196, 0.2);
}

/* ── WAVES ── */
.wave-d2l {
  display: block;
  width: 100%;
  line-height: 0;
}
.wave-l2d {
  display: block;
  width: 100%;
  line-height: 0;
}
/* ── AUDIO TOGGLE ── */
.audio-toggle {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 400;
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(7, 18, 30, 0.88);
  border: 1px solid rgba(74, 184, 255, 0.25);
  border-radius: 24px;
  padding: 8px 14px 8px 10px;
  cursor: pointer;
  backdrop-filter: blur(12px);
  transition:
    border-color 0.2s,
    background 0.2s;
  user-select: none;
  font-family: 'DM Sans', sans-serif;
}
.audio-toggle:hover {
  border-color: rgba(74, 184, 255, 0.5);
  background: rgba(7, 18, 30, 0.96);
}
.audio-toggle-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(74, 184, 255, 0.12);
  border: 1px solid rgba(74, 184, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.2s;
}
.audio-toggle.playing .audio-toggle-icon {
  background: rgba(74, 184, 255, 0.22);
  border-color: rgba(74, 184, 255, 0.5);
}
.audio-toggle-label {
  font-size: 12px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 0.5px;
  white-space: nowrap;
  transition: color 0.2s;
}
.audio-toggle.playing .audio-toggle-label {
  color: rgba(125, 211, 232, 0.9);
}
.audio-bars {
  display: flex;
  align-items: flex-end;
  gap: 2px;
  height: 12px;
}
.audio-bar {
  width: 3px;
  border-radius: 2px;
  background: #4ab8ff;
  opacity: 0.5;
  transition:
    opacity 0.2s,
    height 0.1s ease;
}
.audio-toggle.playing .audio-bar {
  opacity: 1;
}
.audio-toggle.playing .audio-bar:nth-child(1) {
  animation: bar1 1.1s ease-in-out infinite;
}
.audio-toggle.playing .audio-bar:nth-child(2) {
  animation: bar2 1.4s ease-in-out infinite 0.15s;
}
.audio-toggle.playing .audio-bar:nth-child(3) {
  animation: bar3 1s ease-in-out infinite 0.3s;
}
.audio-toggle.playing .audio-bar:nth-child(4) {
  animation: bar2 1.3s ease-in-out infinite 0.05s;
}
@keyframes bar1 {
  0%,
  100% {
    height: 3px;
  }
  50% {
    height: 10px;
  }
}
@keyframes bar2 {
  0%,
  100% {
    height: 5px;
  }
  50% {
    height: 12px;
  }
}
@keyframes bar3 {
  0%,
  100% {
    height: 8px;
  }
  50% {
    height: 4px;
  }
}

/* Click-sync spike — fires when 236dB card enters view */
.audio-toggle.click-spike .audio-bar {
  animation: none !important;
}
.audio-toggle.click-spike .audio-bar:nth-child(1) {
  height: 3px !important;
}
.audio-toggle.click-spike .audio-bar:nth-child(2) {
  height: 12px !important;
}
.audio-toggle.click-spike .audio-bar:nth-child(3) {
  height: 12px !important;
}
.audio-toggle.click-spike .audio-bar:nth-child(4) {
  height: 12px !important;
}

@media (prefers-reduced-motion: reduce) {
  .audio-bar {
    animation: none !important;
  }
}

/* ── RESPONSIVE ── */
@media (max-width: 680px) {
  .stat-grid {
    grid-template-columns: 1fr 1fr;
  }
  .fact-body {
    font-size: 16px;
  }
  .dp-label {
    width: 130px;
  }
  .sec-inner {
    padding: 3rem 1.25rem;
  }
}
@media (max-width: 420px) {
  .stat-grid {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 2.6rem;
  }
  .sec-inner {
    padding: 2.5rem 1rem;
  }
}