:root {
  --bg-canvas: #f3e9d8;
  --bg-surface: #fffaf0;
  --bg-surface-hover: #f7efe0;
  --text-primary: #262626;
  --text-muted: #524d44;
  --accent-primary: #166044;
  --accent-secondary: #9c5b25;
  --border-subtle: rgba(22, 96, 68, 0.22);
  --ease-kinetic: cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-elevation: 0 12px 32px -4px rgba(38, 38, 38, 0.12);
  --glow-accent: 0 0 20px -6px rgba(22, 96, 68, 0.35);
  --radius-card: 20px;
}

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

html, body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  font-family: Charter, Cambria, Georgia, serif;
  line-height: 1.65;
  font-size: 1.0625rem;
  overflow-wrap: anywhere;
  hyphens: auto;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-card);
  object-fit: cover;
}

a {
  color: var(--accent-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s ease;
}

a:hover, a:focus-visible {
  color: var(--accent-secondary);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.reading-width {
  max-width: 70ch;
  margin: 0 auto;
}

.exp-label {
  font-variant: small-caps;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--accent-primary);
  display: inline-block;
  margin-bottom: 0.35rem;
  font-size: 0.95rem;
}

/* Header & Nav */
.site-header {
  position: relative;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  padding: 1.1rem 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand-mark {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  margin-right: auto;
}

.brand-icon {
  width: 28px;
  height: 28px;
  border: 2px solid var(--accent-primary);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle, var(--accent-primary) 30%, transparent 32%);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-menu a {
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.98rem;
  padding: 0.35rem 0.2rem;
  border-bottom: 2px solid transparent;
}

.nav-menu a:hover, .nav-menu a[aria-current="page"] {
  color: var(--accent-primary);
  border-bottom-color: var(--accent-primary);
}

.menu-toggle {
  display: none;
  background: transparent;
  border: 1.5px solid var(--accent-primary);
  color: var(--accent-primary);
  font-size: 1.35rem;
  line-height: 1;
  padding: 0.35rem 0.65rem;
  cursor: pointer;
}

/* Dot Pattern Backgrounds */
.dot-pattern {
  background-image: radial-gradient(rgba(22, 96, 68, 0.16) 1.5px, transparent 1.5px);
  background-size: 20px 20px;
}

/* Hero Section */
.hero-section {
  padding: 4rem 0;
  border-bottom: 1px solid var(--border-subtle);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: center;
}

h1 {
  font-size: clamp(2.1rem, 4vw, 3.2rem);
  line-height: 1.15;
  margin: 0.25rem 0 1.25rem;
  color: var(--text-primary);
}

h2 {
  font-size: clamp(1.65rem, 2.8vw, 2.25rem);
  line-height: 1.22;
  margin: 0 0 1rem;
}

h3 {
  font-size: 1.35rem;
  line-height: 1.3;
  margin: 0 0 0.65rem;
}

.hero-lead {
  font-size: 1.2rem;
  color: var(--text-muted);
  margin-bottom: 1.75rem;
}

.hero-collage {
  position: relative;
  min-height: 380px;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  align-items: center;
}

.collage-img-1 {
  grid-column: 1 / 8;
  grid-row: 1;
  z-index: 2;
  box-shadow: var(--shadow-elevation);
  border: 3px solid var(--bg-surface);
  aspect-ratio: 4 / 3;
}

.collage-img-2 {
  grid-column: 6 / 13;
  grid-row: 1;
  margin-top: -5rem;
  z-index: 1;
  box-shadow: var(--shadow-elevation);
  border: 3px solid var(--bg-surface);
  aspect-ratio: 4 / 3;
}

.collage-img-3 {
  grid-column: 4 / 11;
  grid-row: 1;
  margin-top: 8.5rem;
  z-index: 3;
  box-shadow: var(--shadow-elevation);
  border: 3px solid var(--bg-surface);
  aspect-ratio: 16 / 10;
}

/* Square-ended Outlined Buttons */
.btn-outline {
  display: inline-block;
  border-radius: 0;
  border: 2px solid var(--accent-primary);
  background-color: transparent;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.75rem 1.35rem;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.25s var(--ease-kinetic), background-color 0.2s ease, color 0.2s ease, box-shadow 0.25s ease;
}

.btn-outline:hover, .btn-outline:focus-visible {
  background-color: var(--accent-primary);
  color: var(--bg-surface);
  transform: translateY(-3px);
  box-shadow: var(--shadow-elevation);
}

.btn-outline.active-state {
  background-color: var(--accent-primary);
  color: var(--bg-surface);
}

/* Sections & Layout */
.section-block {
  padding: 4rem 0;
  border-bottom: 1px solid var(--border-subtle);
}

.section-header {
  margin-bottom: 2.5rem;
}

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

/* Cards with Overlapping Emerald Badges */
.cabinet-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  padding: 1.25rem;
  box-shadow: var(--shadow-elevation);
  transition: transform 0.3s var(--ease-kinetic), box-shadow 0.3s var(--ease-kinetic);
  display: flex;
  flex-direction: column;
}

.cabinet-card:hover {
  transform: translateY(-5px) scale(1.01);
  box-shadow: var(--shadow-elevation), var(--glow-accent);
}

.card-media-wrap {
  position: relative;
  margin-bottom: 1.35rem;
}

.card-media-wrap img {
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-card);
}

.emerald-badge {
  position: absolute;
  bottom: -12px;
  left: 16px;
  background-color: var(--accent-primary);
  color: var(--bg-surface);
  font-variant: small-caps;
  letter-spacing: 0.08em;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 0.25rem 0.85rem;
  border-radius: 6px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.18);
}

/* Experiment Panel & Condition Strip */
.experiment-panel {
  background-color: var(--bg-surface);
  border: 1.5px solid var(--accent-primary);
  border-radius: var(--radius-card);
  padding: 2rem;
  margin: 2rem 0;
  box-shadow: var(--shadow-elevation);
}

.condition-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 0.75rem 1.1rem;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

.condition-item strong {
  font-variant: small-caps;
  color: var(--accent-primary);
  margin-right: 0.3rem;
}

.audio-controls-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem;
  padding: 1rem 0;
  border-top: 1px dashed var(--border-subtle);
  border-bottom: 1px dashed var(--border-subtle);
  margin: 1.25rem 0;
}

.volume-group {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  margin-left: auto;
}

.volume-group input[type="range"] {
  accent-color: var(--accent-primary);
}

.status-readout {
  font-size: 0.9rem;
  color: var(--accent-primary);
  font-weight: 600;
  min-height: 1.4em;
}

/* Tabs */
.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 0.75rem;
}

.tab-panel {
  display: none;
  padding: 1rem 0;
}

.tab-panel.is-active {
  display: block;
}

/* Explanation Accordions */
.exp-accordion {
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  background-color: var(--bg-surface);
  margin-bottom: 0.85rem;
  padding: 0.25rem 1.1rem;
}

.exp-accordion summary {
  cursor: pointer;
  padding: 0.85rem 0;
  font-weight: 700;
  color: var(--text-primary);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.exp-accordion summary::-webkit-details-marker {
  display: none;
}

.exp-accordion summary::after {
  content: "+";
  color: var(--accent-primary);
  font-size: 1.25rem;
  font-weight: 700;
}

.exp-accordion[open] summary::after {
  content: "−";
}

.accordion-body {
  padding: 0.25rem 0 1.1rem;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-muted);
}

/* Tables & Forms */
.table-wrap {
  overflow-x: auto;
  margin: 1.5rem 0;
  border-radius: 14px;
  border: 1px solid var(--border-subtle);
}

table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--bg-surface);
  text-align: left;
}

th, td {
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
}

th {
  background-color: rgba(22, 96, 68, 0.08);
  font-variant: small-caps;
  letter-spacing: 0.05em;
  color: var(--accent-primary);
}

.form-grid {
  display: grid;
  gap: 1.25rem;
  max-width: 640px;
}

.form-field label {
  display: block;
  font-weight: 700;
  margin-bottom: 0.35rem;
  font-size: 0.95rem;
}

.form-field input, .form-field select, .form-field textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1.5px solid var(--border-subtle);
  border-radius: 8px;
  background-color: var(--bg-surface);
  font-family: inherit;
  font-size: 1rem;
  color: var(--text-primary);
}

.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
  outline: 2px solid var(--accent-primary);
  border-color: var(--accent-primary);
}

/* Footer */
.site-footer {
  background-color: var(--bg-surface);
  border-top: 2px solid var(--border-subtle);
  padding: 3.5rem 0 2.5rem;
  margin-top: 3rem;
  font-size: 0.95rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.5rem;
}

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  color: var(--text-muted);
}

/* Scroll Reveal */
.reveal-item {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.65s var(--ease-kinetic), transform 0.65s var(--ease-kinetic);
}

.reveal-item.reveal-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive Breakpoints */
@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .hero-collage {
    min-height: 300px;
    margin-top: 1rem;
  }
}

@media (max-width: 767px) {
  .menu-toggle {
    display: inline-block;
  }
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--bg-surface);
    border-bottom: 2px solid var(--accent-primary);
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem 1.5rem;
    gap: 0.85rem;
    z-index: 50;
    box-shadow: var(--shadow-elevation);
  }
  .nav-menu.is-open {
    display: flex;
  }
  .volume-group {
    margin-left: 0;
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}