:root {
  --background: #f4f7f5;
  --surface: #ffffff;
  --surface-soft: #f7faf8;
  --text: #183129;
  --text-muted: #5e716a;
  --border: #d9e4df;
  --border-strong: #bfd0c8;
  --primary: #176c4c;
  --primary-dark: #0e4f38;
  --primary-soft: #e2f2eb;
  --warning-soft: #fff4d6;
  --warning-text: #674e00;
  --danger-soft: #ffe8e6;
  --danger-text: #7a2018;
  --shadow: 0 18px 45px rgba(25, 58, 46, 0.09);
  --radius-large: 22px;
  --radius-medium: 14px;
  --radius-small: 9px;
  --page-width: 1540px;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--background);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 95% 0%, rgba(87, 162, 126, 0.12), transparent 30rem),
    var(--background);
  color: var(--text);
  line-height: 1.5;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(23, 108, 76, 0.28);
  outline-offset: 2px;
}

.page-shell {
  width: min(calc(100% - 32px), var(--page-width));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  padding: 10px 14px;
  border-radius: var(--radius-small);
  background: var(--text);
  color: white;
  transform: translateY(-160%);
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  padding: 38px 0 32px;
  background:
    linear-gradient(125deg, rgba(9, 67, 47, 0.98), rgba(24, 112, 78, 0.94)),
    var(--primary);
  color: white;
}

.header-content {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
}

.eyebrow {
  margin: 0 0 6px;
  color: inherit;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  opacity: 0.78;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 800px;
  margin-bottom: 8px;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.06;
  letter-spacing: -0.035em;
}

h2 {
  margin-bottom: 4px;
  font-size: 1.28rem;
  line-height: 1.25;
}

h3 {
  margin-bottom: 10px;
  font-size: 0.95rem;
}

.header-copy {
  max-width: 720px;
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 1.04rem;
}

.dataset-badge {
  flex: 0 0 auto;
  min-width: 180px;
  padding: 13px 16px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-medium);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
}

.dataset-badge span,
.dataset-badge strong {
  display: block;
}

.dataset-badge span {
  margin-bottom: 2px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.app-layout {
  display: grid;
  grid-template-columns: minmax(275px, 360px) minmax(0, 1fr);
  gap: 24px;
  align-items: start;
  padding-block: 28px 56px;
}

.control-panel,
.chart-card,
.information-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-large);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.control-panel {
  position: sticky;
  top: 16px;
  overflow: hidden;
}

.panel-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 22px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-soft);
}

.panel-heading h2 {
  margin-bottom: 0;
}

.control-section {
  padding: 19px 22px;
  border-bottom: 1px solid var(--border);
}

.control-section:last-child {
  border-bottom: 0;
}

.field-label {
  display: block;
  margin-bottom: 7px;
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 750;
}

.field-control {
  width: 100%;
  min-height: 43px;
  padding: 9px 11px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-small);
  background: white;
  color: var(--text);
  transition:
    border-color 150ms ease,
    box-shadow 150ms ease;
}

.field-control:hover {
  border-color: #92aea1;
}

.field-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(23, 108, 76, 0.1);
  outline: none;
}

.field-help {
  margin: 7px 0 0;
  color: var(--text-muted);
  font-size: 0.78rem;
}

.date-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.quick-range,
.preset-row {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 11px;
}

.chip-button,
.button {
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: white;
  color: var(--text);
  font-size: 0.78rem;
  font-weight: 700;
  transition:
    background 130ms ease,
    border-color 130ms ease,
    color 130ms ease,
    transform 130ms ease;
}

.chip-button {
  padding: 7px 10px;
}

.button {
  padding: 7px 11px;
}

.chip-button:hover,
.button:hover {
  border-color: var(--primary);
  color: var(--primary-dark);
  transform: translateY(-1px);
}

.button-quiet {
  flex: 0 0 auto;
  border-color: transparent;
  background: transparent;
  color: var(--primary);
}

.section-title-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 11px;
}

.section-title-row h3 {
  margin-bottom: 0;
}

.species-section {
  padding-bottom: 14px;
}

.species-list {
  max-height: 390px;
  margin-top: 12px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-medium);
  background: var(--surface-soft);
  scrollbar-color: #a9beb4 transparent;
  scrollbar-width: thin;
}

.species-option {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  gap: 9px;
  align-items: start;
  padding: 10px 11px;
  border-bottom: 1px solid var(--border);
  background: transparent;
  transition: background 120ms ease;
}

.species-option:last-child {
  border-bottom: 0;
}

.species-option:hover {
  background: white;
}

.species-option input {
  width: 17px;
  height: 17px;
  margin: 2px 0 0;
  accent-color: var(--primary);
}

.species-name {
  display: block;
  overflow-wrap: anywhere;
  font-size: 0.84rem;
  font-weight: 750;
}

.species-meta {
  display: block;
  margin-top: 2px;
  color: var(--text-muted);
  font-size: 0.72rem;
}

.species-warning {
  color: #9b5a00;
  font-weight: 800;
}

.no-search-results {
  padding: 24px 14px;
  color: var(--text-muted);
  text-align: center;
  font-size: 0.84rem;
}

.visualization-column {
  min-width: 0;
}

.message {
  margin-bottom: 14px;
  padding: 12px 15px;
  border-radius: var(--radius-medium);
  font-size: 0.86rem;
}

.message[hidden] {
  display: none;
}

.message-info {
  border: 1px solid #c9dfd5;
  background: var(--primary-soft);
  color: var(--primary-dark);
}

.message-warning {
  border: 1px solid #eed792;
  background: var(--warning-soft);
  color: var(--warning-text);
}

.message-error {
  border: 1px solid #f1bcb7;
  background: var(--danger-soft);
  color: var(--danger-text);
}

.chart-card {
  min-width: 0;
  overflow: hidden;
}

.chart-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 24px 14px;
}

.chart-subtitle {
  margin-bottom: 0;
  color: var(--text-muted);
  font-size: 0.86rem;
}

.legend-key {
  display: flex;
  align-items: center;
  gap: 7px;
  flex: 0 0 auto;
  margin-top: 3px;
  color: var(--text-muted);
  font-size: 0.75rem;
}

.legend-gap {
  width: 16px;
  height: 12px;
  border: 1px solid #c4ccc8;
  border-radius: 3px;
  background: #e5e8e6;
}

.heatmap {
  width: 100%;
  min-height: 460px;
}

.empty-state {
  margin: 28px 24px;
  padding: 60px 24px;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-medium);
  background: var(--surface-soft);
  color: var(--text-muted);
  text-align: center;
}

.empty-state strong {
  display: block;
  margin-bottom: 5px;
  color: var(--text);
}

.empty-state p {
  margin-bottom: 0;
}

.chart-note {
  min-height: 20px;
  margin: 0;
  padding: 0 24px 20px;
  color: var(--text-muted);
  font-size: 0.76rem;
}

.information-card {
  margin-top: 18px;
  padding: 22px 24px;
}

.information-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 16px;
}

.information-grid > div {
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-medium);
  background: var(--surface-soft);
}

.information-grid strong {
  display: block;
  margin-bottom: 4px;
  font-size: 0.84rem;
}

.information-grid p {
  margin-bottom: 0;
  color: var(--text-muted);
  font-size: 0.79rem;
}

.site-footer {
  padding: 22px 0 34px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.78rem;
}

.site-footer p {
  margin-bottom: 0;
}

.noscript-message {
  position: fixed;
  inset: auto 12px 12px;
  z-index: 100;
  padding: 14px;
  border-radius: var(--radius-medium);
  background: var(--danger-text);
  color: white;
  text-align: center;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

@media (max-width: 1050px) {
  .app-layout {
    grid-template-columns: 1fr;
  }

  .control-panel {
    position: static;
  }

  .species-list {
    max-height: 310px;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(calc(100% - 20px), var(--page-width));
  }

  .site-header {
    padding: 28px 0 25px;
  }

  .header-content,
  .chart-heading {
    flex-direction: column;
    align-items: stretch;
  }

  .dataset-badge {
    min-width: 0;
  }

  .app-layout {
    gap: 16px;
    padding-block: 18px 40px;
  }

  .panel-heading,
  .control-section,
  .chart-heading,
  .information-card {
    padding-left: 16px;
    padding-right: 16px;
  }

  .date-grid,
  .information-grid {
    grid-template-columns: 1fr;
  }

  .heatmap {
    min-height: 420px;
  }

  .legend-key {
    margin-top: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}

/* Phase 3 additions */
.dataset-controls .field-label-spaced {
  margin-top: 14px;
}

.chart-card .plot-container {
  border-top: 1px solid rgba(217, 228, 223, 0.72);
}

@media (min-width: 721px) {
  .dataset-controls {
    background:
      linear-gradient(180deg, rgba(226, 242, 235, 0.45), transparent 80%);
  }
}