/* Miliardul de Bătăi · Stil Canonic & Identitate Vizuală Fiziologică */

:root {
  --bg-primary: #0a0d14;
  --bg-surface: #121824;
  --bg-surface-elevated: #182232;
  --bg-surface-sunken: #07090f;
  
  --border-subtle: #1e293b;
  --border-active: #334155;
  --border-pulse: rgba(255, 51, 75, 0.4);
  
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0a0d14;
  
  --crimson-arterial: #ff334b;
  --crimson-glow: rgba(255, 51, 75, 0.25);
  --crimson-dim: rgba(255, 51, 75, 0.1);
  
  --cyan-venous: #38bdf8;
  --cyan-dim: rgba(56, 189, 248, 0.15);
  
  --amber-atp: #f59e0b;
  --amber-dim: rgba(245, 158, 11, 0.15);
  
  --emerald-human: #10b981;
  --emerald-dim: rgba(16, 185, 129, 0.15);

  --font-serif: Fraunces, "Newsreader", "Iowan Old Style", "Georgia", serif;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-pulse: 0 0 30px rgba(255, 51, 75, 0.2);
  --transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: 
    radial-gradient(circle at 50% 0%, rgba(255, 51, 75, 0.08) 0%, transparent 60%),
    radial-gradient(circle at 100% 50%, rgba(56, 189, 248, 0.03) 0%, transparent 50%),
    var(--bg-primary);
  background-attachment: fixed;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--crimson-arterial);
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  z-index: 1000;
  font-weight: 600;
  text-decoration: none;
  transition: top 0.2s;
}
.skip-link:focus {
  top: 1rem;
}

/* Nav & Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 13, 20, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
}

.header-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
}

.brand-pulse-icon {
  width: 22px;
  height: 22px;
  color: var(--crimson-arterial);
  display: flex;
  align-items: center;
  justify-content: center;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.audio-toggle-btn, .lang-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.8rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
}

.audio-toggle-btn:hover, .lang-link:hover {
  color: var(--text-primary);
  border-color: var(--border-active);
  background: var(--bg-surface-elevated);
}

.audio-toggle-btn.active {
  color: var(--crimson-arterial);
  border-color: var(--crimson-arterial);
  background: var(--crimson-dim);
}

.lang-link.current {
  color: #fff;
  font-weight: 600;
  border-color: var(--text-muted);
}

/* Layout container */
.main-wrapper {
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 5rem;
  flex: 1;
}

/* Hero Section */
.hero-section {
  padding: 2rem 0 3.5rem;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 3.5rem;
}

.hero-pill-group {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.pill-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  background: var(--bg-surface);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

.pill-badge.highlight {
  background: var(--crimson-dim);
  color: var(--crimson-arterial);
  border-color: var(--border-pulse);
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  line-height: 1.1;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1.75rem;
  max-width: 820px;
}

.hero-standfirst {
  font-size: 1.05rem;
  color: #cbd5e1;
  line-height: 1.7;
  max-width: 860px;
  margin-bottom: 2.5rem;
  padding-left: 1.25rem;
  border-left: 2px solid var(--crimson-arterial);
}

/* Hero Stat Grid */
.stat-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}

.stat-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.stat-box:hover {
  border-color: var(--border-active);
  background: var(--bg-surface-elevated);
}

.stat-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--border-subtle);
}

.stat-box.accent-crimson::before { background: var(--crimson-arterial); }
.stat-box.accent-amber::before { background: var(--amber-atp); }
.stat-box.accent-cyan::before { background: var(--cyan-venous); }
.stat-box.accent-emerald::before { background: var(--emerald-human); }

.stat-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: 0.25rem;
}

.stat-sub {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Section Common */
.content-section {
  margin-bottom: 4.5rem;
}

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--crimson-arterial);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
  display: block;
}

.section-heading {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3.5vw, 2.3rem);
  line-height: 1.2;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.section-lead {
  font-size: 1.08rem;
  color: var(--text-secondary);
  line-height: 1.65;
  max-width: 800px;
  margin-bottom: 2rem;
}

/* Signature Interaction 1: Pulse Resonator */
.resonator-container {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-subtle);
  margin-bottom: 2.5rem;
}

.resonator-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.75rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
}

.species-select-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.select-label {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.species-dropdown {
  background: var(--bg-surface-sunken);
  color: var(--text-primary);
  border: 1px solid var(--border-active);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.85rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  cursor: pointer;
  outline: none;
}

.species-dropdown:focus {
  border-color: var(--crimson-arterial);
  box-shadow: 0 0 0 2px var(--crimson-dim);
}

.resonator-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.cardiac-card {
  background: var(--bg-surface-sunken);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
}

.cardiac-card:hover {
  border-color: var(--border-active);
}

.cardiac-card.slot-human {
  border-color: rgba(16, 185, 129, 0.4);
}

.card-header-flex {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.species-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text-primary);
}

.species-binomial {
  font-size: 0.82rem;
  font-style: italic;
  color: var(--text-muted);
}

.bpm-badge {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  background: var(--crimson-dim);
  color: var(--crimson-arterial);
  border: 1px solid var(--border-pulse);
}

.cardiac-visual-area {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem 0;
  position: relative;
  height: 140px;
}

.pulse-circle-wrapper {
  position: relative;
  width: 90px;
  height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pulse-ring {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 2px solid var(--crimson-arterial);
  opacity: 0.3;
  transform: scale(0.8);
  pointer-events: none;
}

.pulse-heart-node {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--crimson-arterial);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.2rem;
  box-shadow: 0 0 16px var(--crimson-arterial);
  z-index: 2;
  transition: transform 0.05s ease-out;
}

.ecg-canvas-container {
  height: 50px;
  width: 100%;
  background: rgba(10, 13, 20, 0.7);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  margin-top: 0.75rem;
  overflow: hidden;
}

.ecg-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.card-metrics-table {
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  border-top: 1px solid var(--border-subtle);
  padding-top: 0.75rem;
}

.metric-row {
  display: flex;
  justify-content: space-between;
  padding: 0.25rem 0;
  color: var(--text-secondary);
}

.metric-row .val {
  color: var(--text-primary);
  font-weight: 600;
}

.minute-ticker-banner {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.ticker-title-block {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.ticker-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--amber-dim);
  color: var(--amber-atp);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.ticker-comparison-readouts {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  align-items: center;
}

.readout-item {
  display: flex;
  flex-direction: column;
}

.readout-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.readout-count {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* Personal Cardiac Calculator */
.calculator-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: var(--shadow-subtle);
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 2.5rem;
  align-items: start;
}

@media (max-width: 850px) {
  .calculator-card {
    grid-template-columns: 1fr;
  }
}

.calc-inputs {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.input-control-block {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.input-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.input-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.input-display-val {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--crimson-arterial);
}

.range-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--border-subtle);
  outline: none;
  cursor: pointer;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--crimson-arterial);
  cursor: pointer;
  box-shadow: 0 0 10px var(--crimson-arterial);
  transition: transform 0.1s;
}

.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.preset-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.preset-pill-btn {
  background: var(--bg-surface-sunken);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  padding: 0.35rem 0.65rem;
  font-size: 0.78rem;
  cursor: pointer;
  transition: var(--transition);
}

.preset-pill-btn:hover {
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  border-color: var(--border-active);
}

.preset-pill-btn.active {
  background: var(--crimson-dim);
  color: var(--crimson-arterial);
  border-color: var(--border-pulse);
}

.calc-results-pane {
  background: var(--bg-surface-sunken);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.result-stat-hero {
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 1.25rem;
}

.result-hero-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 0.35rem;
}

.result-hero-number {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 4vw, 2.6rem);
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.1;
}

.result-hero-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-top: 0.4rem;
}

.progress-bar-container {
  margin: 0.5rem 0;
}

.progress-bar-track {
  width: 100%;
  height: 14px;
  background: var(--bg-surface);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
  border: 1px solid var(--border-subtle);
}

.progress-bar-fill-mammal {
  height: 100%;
  background: var(--amber-atp);
  border-radius: var(--radius-full) 0 0 var(--radius-full);
  float: left;
}

.progress-bar-fill-human {
  height: 100%;
  background: var(--emerald-human);
  float: left;
}

.progress-legend {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.4rem;
}

.calc-breakdown-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  font-size: 0.9rem;
}

.breakdown-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.35rem 0;
  border-bottom: 1px dashed var(--border-subtle);
}

.breakdown-row:last-child {
  border-bottom: none;
}

.breakdown-label {
  color: var(--text-secondary);
}

.breakdown-value {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text-primary);
}

/* Logarithmic Allometric Curve Chart */
.chart-container-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 2.5rem;
}

.chart-header-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.chart-toggle-group {
  display: flex;
  background: var(--bg-surface-sunken);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 2px;
}

.chart-toggle-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.chart-toggle-btn.active {
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  font-weight: 600;
}

.chart-svg-wrapper {
  width: 100%;
  height: 380px;
  position: relative;
}

.chart-svg {
  width: 100%;
  height: 100%;
}

.chart-caption {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 1rem;
  line-height: 1.5;
}

/* Species Table Explorer */
.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  margin-top: 1.5rem;
}

.species-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.species-table th {
  background: var(--bg-surface-sunken);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}

.species-table th:hover {
  color: var(--text-primary);
}

.species-table td {
  padding: 0.9rem 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  white-space: nowrap;
}

.species-table tr:last-child td {
  border-bottom: none;
}

.species-table tr:hover td {
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
}

.species-table tr.row-human td {
  background: rgba(16, 185, 129, 0.08);
  font-weight: 600;
  color: #fff;
}

.table-species-name {
  font-weight: 600;
  color: var(--text-primary);
}

.table-species-latin {
  font-size: 0.78rem;
  font-style: italic;
  color: var(--text-muted);
  margin-left: 0.4rem;
}

.table-num {
  font-family: var(--font-mono);
  color: var(--text-primary);
}

/* Editorial Narrative Prose */
.narrative-block {
  max-width: 780px;
  margin: 0 auto;
  font-size: 1.08rem;
  line-height: 1.8;
  color: #cbd5e1;
}

.narrative-block p {
  margin-bottom: 1.5rem;
}

.narrative-block h3 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 2.5rem 0 1rem;
}

.narrative-quote {
  border-left: 3px solid var(--amber-atp);
  padding-left: 1.25rem;
  margin: 2rem 0;
  font-style: italic;
  color: var(--text-primary);
}

/* Method & Source Footnote */
.method-footer {
  margin-top: 5rem;
  padding-top: 3rem;
  border-top: 1px solid var(--border-subtle);
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.method-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.method-title {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.method-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.sources-list {
  list-style: none;
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.sources-list li {
  padding-left: 1rem;
  position: relative;
}

.sources-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--crimson-arterial);
}

.site-bottom-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
}

.portfolio-link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s;
}

.portfolio-link:hover {
  color: var(--crimson-arterial);
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .pulse-ring {
    display: none;
  }
}

/* Responsive Mobile Polish */
@media (max-width: 600px) {
  .main-wrapper {
    padding: 1.25rem 1rem 3.5rem;
  }
  .header-container {
    padding: 0.5rem 0.75rem;
    gap: 0.35rem;
  }
  .brand-link {
    font-size: 0.8rem;
    gap: 0.35rem;
    white-space: nowrap;
  }
  .brand-pulse-icon {
    width: 18px;
    height: 18px;
  }
  .header-controls {
    gap: 0.3rem;
    flex-shrink: 0;
  }
  .audio-toggle-btn .audio-label {
    display: none;
  }
  .audio-toggle-btn {
    padding: 0.25rem 0.45rem;
    font-size: 0.8rem;
  }
  .lang-link {
    padding: 0.25rem 0.45rem;
    font-size: 0.72rem;
  }
  .hero-section {
    padding: 1rem 0 2rem;
    margin-bottom: 2.5rem;
  }
  .hero-title {
    font-size: 2.1rem;
    line-height: 1.15;
    margin-bottom: 1rem;
  }
  .hero-subtitle {
    font-size: 1.05rem;
    line-height: 1.45;
    margin-bottom: 1.25rem;
  }
  .hero-standfirst {
    font-size: 0.95rem;
    line-height: 1.6;
    padding-left: 0.85rem;
    margin-bottom: 1.75rem;
  }
  .stat-strip {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .stat-box {
    padding: 1rem 1.25rem;
  }
  .stat-value {
    font-size: 1.6rem;
  }
  .resonator-container {
    padding: 1.25rem 1rem;
  }
  .resonator-controls {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }
  .species-select-group {
    justify-content: space-between;
    width: 100%;
  }
  .species-dropdown {
    flex: 1;
    max-width: 260px;
  }
  .calculator-card {
    padding: 1.25rem 1rem;
    gap: 1.75rem;
  }
  .calc-results-pane {
    padding: 1.25rem 1rem;
  }
  .chart-container-box {
    padding: 1.25rem 1rem;
  }
  .chart-svg-wrapper {
    height: 300px;
  }
  .chart-header-row {
    flex-direction: column;
    align-items: flex-start;
  }
  .minute-ticker-banner {
    padding: 1rem;
    flex-direction: column;
    align-items: flex-start;
  }
  .ticker-comparison-readouts {
    width: 100%;
    justify-content: space-between;
    gap: 0.75rem;
  }
}