* {
  box-sizing: border-box;
}

:root {
  --bg: #f5fbff;
  --bg-mesh-1: rgba(110, 231, 183, 0.18);
  --bg-mesh-2: rgba(96, 165, 250, 0.16);
  --bg-mesh-3: rgba(244, 114, 182, 0.11);

  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: #ffffff;
  --surface-soft: #f8fdff;

  --text: #16324f;
  --muted: #53718d;

  --navy: #143b63;
  --teal: #0f8b8d;
  --green: #2ba84a;
  --lime: #7ccf5f;
  --blue: #3b82f6;
  --purple: #7c5cff;
  --pink: #ec4899;
  --orange: #f59e0b;

  --border: rgba(124, 92, 255, 0.12);
  --border-strong: rgba(20, 59, 99, 0.12);

  --shadow-lg: 0 22px 60px rgba(17, 24, 39, 0.12);
  --shadow-md: 0 16px 32px rgba(17, 24, 39, 0.08);
  --shadow-sm: 0 8px 20px rgba(17, 24, 39, 0.06);

  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;

  --font-display: "Baloo 2", system-ui, sans-serif;
  --font-body: "Inter", Arial, Helvetica, sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  line-height: 1.65;
  color: var(--text);
  background:
    radial-gradient(circle at top left, var(--bg-mesh-1), transparent 30%),
    radial-gradient(circle at top right, var(--bg-mesh-2), transparent 30%),
    radial-gradient(circle at bottom center, var(--bg-mesh-3), transparent 32%),
    var(--bg);
}

.page-shell {
  overflow: hidden;
}

.container {
  width: min(1180px, 92%);
  margin: 0 auto;
}

.hero {
  position: relative;
  isolation: isolate;
  padding: 4.5rem 0 3.75rem;
  background:
    linear-gradient(135deg, rgba(20, 59, 99, 0.96), rgba(15, 139, 141, 0.9)),
    linear-gradient(45deg, rgba(124, 92, 255, 0.14), rgba(43, 168, 74, 0.08));
  color: white;
}

.hero-orb {
  position: absolute;
  border-radius: 999px;
  filter: blur(10px);
  opacity: 0.55;
  z-index: -1;
}

.hero-orb-one {
  width: 280px;
  height: 280px;
  background: rgba(123, 245, 193, 0.22);
  top: -70px;
  right: 6%;
}

.hero-orb-two {
  width: 220px;
  height: 220px;
  background: rgba(255, 255, 255, 0.12);
  bottom: -70px;
  left: 6%;
}

.hero-content {
  display: grid;
  grid-template-columns: 1.45fr 0.9fr;
  gap: 2rem;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  margin: 0 0 0.8rem;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(6px);
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0 0 0.8rem;
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  line-height: 0.98;
  letter-spacing: 0.01em;
}

.subtitle {
  margin: 0 0 0.95rem;
  max-width: 900px;
  font-size: 1.15rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.96);
}

.hero-description {
  margin: 0;
  max-width: 820px;
  font-size: 1.03rem;
  color: rgba(255, 255, 255, 0.88);
}

.hero-pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.4rem;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 1rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
  font-weight: 700;
  backdrop-filter: blur(6px);
}

.hero-panel-card {
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 26px;
  padding: 1.4rem;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-lg);
}

.hero-panel-card h2 {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1.8rem;
  line-height: 1.05;
}

.hero-panel-card p {
  margin: 0 0 1rem;
  color: rgba(255, 255, 255, 0.88);
}

.mini-label {
  margin: 0 0 0.55rem;
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #d1fae5;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.hero-stat {
  background: rgba(255, 255, 255, 0.14);
  border-radius: 18px;
  padding: 0.9rem 0.7rem;
  text-align: center;
}

.hero-stat-value {
  display: block;
  font-family: var(--font-display);
  font-size: 1.8rem;
  line-height: 1;
  font-weight: 800;
}

.hero-stat-label {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.85rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.88);
}

.main-layout {
  padding: 2.2rem 0 4rem;
}

.card {
  position: relative;
  background: var(--surface);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  margin-bottom: 1.4rem;
  box-shadow: var(--shadow-md);
}

.feature-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 6px;
  border-top-left-radius: var(--radius-xl);
  border-top-right-radius: var(--radius-xl);
  background: linear-gradient(90deg, var(--teal), var(--blue), var(--purple), var(--pink));
}

.section-heading {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.25rem;
}

.section-kicker {
  margin: 0 0 0.2rem;
  color: var(--purple);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.card h2 {
  margin: 0;
  color: var(--navy);
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 2.4vw, 2rem);
  line-height: 1.05;
}

.section-icon {
  flex-shrink: 0;
  display: inline-grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: linear-gradient(135deg, #eef2ff, #dbeafe);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8);
  font-size: 1.4rem;
}

.section-intro {
  margin-top: 0.8rem;
  color: var(--muted);
  font-size: 1rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1rem;
  margin-top: 1.15rem;
}

.ecosystem-card {
  position: relative;
  display: block;
  width: 100%;
  padding: 1.1rem;
  text-align: left;
  color: var(--text);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(244, 249, 255, 0.96));
  border: 1px solid rgba(20, 59, 99, 0.08);
  border-radius: 20px;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.ecosystem-card::after {
  content: "";
  position: absolute;
  inset: auto -25px -25px auto;
  width: 95px;
  height: 95px;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.14), rgba(59, 130, 246, 0.08));
}

.ecosystem-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(59, 130, 246, 0.2);
}

.ecosystem-card.active {
  transform: translateY(-3px);
  border-color: transparent;
  background: linear-gradient(135deg, #ecfeff, #eef2ff);
  box-shadow: 0 18px 34px rgba(59, 130, 246, 0.18);
  outline: 2px solid rgba(59, 130, 246, 0.18);
}

.ecosystem-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.55rem;
}

.ecosystem-emoji {
  font-size: 2rem;
}

.ecosystem-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.42rem 0.7rem;
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.badge-high {
  background: #dcfce7;
  color: #166534;
}

.badge-medium {
  background: #fef3c7;
  color: #92400e;
}

.badge-low {
  background: #fee2e2;
  color: #991b1b;
}

.ecosystem-card h3 {
  position: relative;
  z-index: 1;
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  color: var(--navy);
  font-size: 1.45rem;
  line-height: 1;
}

.ecosystem-card p {
  position: relative;
  z-index: 1;
  margin: 0;
  color: var(--muted);
  font-weight: 700;
}

.details-panel {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(245, 250, 255, 0.98));
  border: 1px solid var(--border-strong);
  border-radius: 20px;
  padding: 1.25rem;
}

.empty-state {
  display: grid;
  place-items: center;
  text-align: center;
  min-height: 180px;
  color: var(--muted);
}

.empty-state-icon {
  font-size: 2.5rem;
  margin-bottom: 0.4rem;
}

.details-hero {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
  margin-bottom: 1rem;
}

.details-icon {
  width: 74px;
  height: 74px;
  border-radius: 22px;
  display: grid;
  place-items: center;
  font-size: 2rem;
  background: linear-gradient(135deg, #dbeafe, #dcfce7);
}

.details-title-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
  margin-bottom: 0.35rem;
}

.details-panel h3 {
  margin: 0;
  font-family: var(--font-display);
  color: var(--navy);
  font-size: clamp(1.8rem, 3vw, 2.3rem);
  line-height: 1;
}

.inline-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.42rem 0.75rem;
  border-radius: 999px;
  background: #e0f2fe;
  color: #075985;
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.metric-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin: 0.8rem 0 1rem;
}

.metric-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.68rem 0.9rem;
  border-radius: 14px;
  background: #f8fbff;
  border: 1px solid rgba(20, 59, 99, 0.08);
  font-weight: 700;
  color: var(--navy);
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(245px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.detail-box {
  background: linear-gradient(180deg, #ffffff, #f7fbff);
  border-radius: 18px;
  padding: 1rem;
  border: 1px solid rgba(20, 59, 99, 0.08);
  box-shadow: var(--shadow-sm);
}

.detail-box h4 {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin-top: 0;
  margin-bottom: 0.65rem;
  color: var(--navy);
  font-size: 1.02rem;
}

.detail-box ul {
  margin: 0.4rem 0 0;
  padding-left: 1.2rem;
}

.detail-box li {
  margin-bottom: 0.42rem;
}

.resource-links-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.1rem;
}

.resource-links-list a {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.75rem 1rem;
  background: linear-gradient(135deg, #eff6ff, #eef2ff);
  border: 1px solid rgba(59, 130, 246, 0.16);
  border-radius: 14px;
  text-decoration: none;
  color: var(--navy);
  font-weight: 800;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.resource-links-list a:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.compare-controls,
.builder-layout {
  display: grid;
  gap: 0.9rem;
  max-width: 620px;
  margin-top: 1rem;
}

.form-group {
  display: grid;
  gap: 0.42rem;
}

label {
  font-weight: 800;
  color: var(--navy);
}

select,
.primary-btn {
  min-height: 52px;
  padding: 0.82rem 1rem;
  border-radius: 15px;
  font-size: 1rem;
}

select {
  border: 1px solid rgba(20, 59, 99, 0.12);
  background: #ffffff;
  color: var(--text);
  font-family: var(--font-body);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

select:focus,
.primary-btn:focus,
.ecosystem-card:focus,
.sim-btn:focus,
.interaction-type-btn:focus,
.interaction-concept-btn:focus {
  outline: 3px solid rgba(59, 130, 246, 0.18);
  outline-offset: 2px;
}

.primary-btn {
  border: none;
  background: linear-gradient(135deg, var(--teal), var(--blue));
  color: white;
  cursor: pointer;
  font-weight: 800;
  letter-spacing: 0.01em;
  box-shadow: 0 14px 26px rgba(59, 130, 246, 0.2);
  transition: transform 0.18s ease, box-shadow 0.18s ease, filter 0.18s ease;
}

.primary-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 32px rgba(59, 130, 246, 0.22);
  filter: saturate(1.05);
}

.results-box {
  margin-top: 1rem;
  background: linear-gradient(180deg, #ffffff, #f7fbff);
  border: 1px solid rgba(59, 130, 246, 0.14);
  border-left: 6px solid var(--blue);
  padding: 1rem 1rem 1rem 1.05rem;
  border-radius: 18px;
  box-shadow: var(--shadow-sm);
}

.results-box h3 {
  margin-top: 0;
  margin-bottom: 0.55rem;
  color: var(--navy);
  font-family: var(--font-display);
  font-size: 1.5rem;
  line-height: 1.05;
}

.chart-container {
  display: grid;
  gap: 0.85rem;
  margin-top: 1rem;
}

.chart-row {
  display: grid;
  grid-template-columns: 140px 1fr 64px;
  gap: 0.8rem;
  align-items: center;
}

.chart-label {
  font-weight: 800;
  color: var(--navy);
}

.chart-bar-wrapper {
  background: #e6eef8;
  border-radius: 999px;
  overflow: hidden;
  height: 26px;
}

.chart-bar {
  height: 26px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--teal), var(--blue), var(--purple));
}

.chart-value {
  font-weight: 800;
  text-align: right;
  color: var(--navy);
}

.simulation-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.sim-btn {
  padding: 0.82rem 1rem;
  border: 1px solid rgba(20, 59, 99, 0.08);
  border-radius: 15px;
  background: linear-gradient(180deg, #ffffff, #f8fbff);
  color: var(--navy);
  cursor: pointer;
  font-size: 0.96rem;
  font-weight: 800;
  box-shadow: var(--shadow-sm);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.sim-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: rgba(59, 130, 246, 0.18);
}

.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.resource-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: linear-gradient(180deg, #ffffff, #f6fbff);
  border: 1px solid rgba(59, 130, 246, 0.12);
  border-radius: 20px;
  padding: 1.1rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.resource-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(124, 92, 255, 0.18);
}

.resource-card h3 {
  margin-top: 0;
  margin-bottom: 0.45rem;
  font-family: var(--font-display);
  color: var(--navy);
  font-size: 1.35rem;
  line-height: 1;
}

.resource-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.footer {
  background: linear-gradient(135deg, #0f172a, #143b63);
  color: white;
  text-align: center;
  padding: 1.15rem 0;
}

.footer-content p {
  margin: 0;
  color: rgba(255, 255, 255, 0.9);
}

em {
  font-style: italic;
}

/* ===== Interaction Explorer ===== */

.interaction-type-buttons,
.interaction-concept-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.interaction-type-btn,
.interaction-concept-btn {
  border: 1px solid rgba(20, 59, 99, 0.1);
  border-radius: 15px;
  background: linear-gradient(180deg, #ffffff, #f8fbff);
  color: var(--navy);
  cursor: pointer;
  font-size: 0.97rem;
  font-weight: 800;
  box-shadow: var(--shadow-sm);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.interaction-type-btn {
  min-height: 52px;
  padding: 0.85rem 1rem;
}

.interaction-concept-btn {
  min-height: 44px;
  padding: 0.7rem 0.95rem;
}

.interaction-type-btn:hover,
.interaction-concept-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: rgba(59, 130, 246, 0.18);
}

.interaction-type-btn.active,
.interaction-concept-btn.active {
  color: white;
  border-color: transparent;
  background: linear-gradient(135deg, var(--purple), var(--blue));
}

.interaction-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.75fr);
  gap: 1rem;
  margin-top: 1.25rem;
}

.interaction-main,
.interaction-sidebar {
  display: grid;
  gap: 1rem;
}

.interaction-header,
.interaction-chart-card,
.interaction-concepts-card,
.interaction-questions-card {
  background: linear-gradient(180deg, #ffffff, #f7fbff);
  border: 1px solid rgba(20, 59, 99, 0.08);
  border-radius: 20px;
  padding: 1rem;
  box-shadow: var(--shadow-sm);
}

.interaction-title-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
  margin-bottom: 0.4rem;
}

.interaction-title-row h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 2.8vw, 2.2rem);
  line-height: 1;
  color: var(--navy);
}

.interaction-header p {
  margin: 0.35rem 0 0;
  color: var(--muted);
}

.interaction-tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 0.9rem;
}

.interaction-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.6rem 0.8rem;
  border-radius: 999px;
  background: #f8fbff;
  border: 1px solid rgba(20, 59, 99, 0.08);
  color: var(--navy);
  font-weight: 700;
}

.interaction-chart-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  margin-bottom: 0.8rem;
}

.interaction-chart-top h3,
.interaction-concepts-card h3,
.interaction-questions-card h3 {
  margin: 0;
  color: var(--navy);
  font-family: var(--font-display);
  font-size: 1.45rem;
  line-height: 1.05;
}

.interaction-graph-area {
  min-height: 360px;
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, #fbfdff, #f4f9ff);
  border: 1px dashed rgba(59, 130, 246, 0.25);
  border-radius: 18px;
  padding: 0.75rem;
}

.interaction-graph-wrap {
  width: 100%;
  overflow-x: auto;
}

.interaction-graph-caption {
  margin-top: 0.75rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.organism-mini-grid {
  display: grid;
  gap: 0.75rem;
}

.organism-mini-card {
  border: 1px solid rgba(20, 59, 99, 0.08);
  border-radius: 16px;
  padding: 0.85rem;
  background: linear-gradient(180deg, #ffffff, #f8fbff);
}

.organism-mini-card h5 {
  margin: 0 0 0.3rem;
  color: var(--navy);
  font-size: 1rem;
}

.organism-mini-card p {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.interaction-question-list {
  margin: 0.8rem 0 0;
  padding-left: 1.15rem;
}

.interaction-question-list li {
  margin-bottom: 0.6rem;
}

.interaction-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.6rem;
  font-size: 0.92rem;
  color: var(--navy);
  font-weight: 700;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.legend-swatch {
  width: 16px;
  height: 16px;
  border-radius: 999px;
  display: inline-block;
}

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

.network-label {
  font-family: var(--font-body);
  font-size: 13px;
  fill: var(--navy);
  font-weight: 700;
}

@media (max-width: 980px) {
  .hero-content {
    grid-template-columns: 1fr;
  }

  .hero-panel {
    max-width: 560px;
  }

  .interaction-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .card {
    padding: 1.15rem;
  }

  .details-hero {
    grid-template-columns: 1fr;
  }

  .chart-row {
    grid-template-columns: 1fr;
    gap: 0.42rem;
  }

  .chart-value {
    text-align: left;
  }

  .simulation-buttons {
    flex-direction: column;
  }

  .sim-btn {
    width: 100%;
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .hero {
    padding: 3.1rem 0 2.7rem;
  }

  .hero h1 {
    font-size: 2.3rem;
  }

  .subtitle {
    font-size: 1rem;
  }

  .hero-description {
    font-size: 0.98rem;
  }

  .section-icon {
    width: 46px;
    height: 46px;
    font-size: 1.2rem;
  }

  .ecosystem-card h3 {
    font-size: 1.25rem;
  }

  .interaction-type-buttons,
  .interaction-concept-buttons {
    flex-direction: column;
  }

  .interaction-type-btn,
  .interaction-concept-btn {
    width: 100%;
  }

  .interaction-graph-area {
    min-height: 280px;
  }
}