/* Bal-DC LULC Atlas — academic one-page styles */

:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --text: #222222;
  --text-muted: #555555;
  --text-light: #444444;
  --border: #e5e5e5;
  --border-mid: #dddddd;
  --accent: #5a7a8a;
  --link: #1772d0;
  --btn-bg: #333333;
  --btn-bg-hover: #111111;
  --max-width: 1040px;
  --prose-max-width: 800px;
  --figure-max-width: 780px;

  --class-building: #fe0000;
  --class-impervious: #858585;
  --class-tree: #218a21;
  --class-herbaceous: #81ec68;
  --class-water: #0000fe;
  --class-bare: #800000;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 28px 20px 40px;
}

/* Header */
.hero {
  text-align: center;
  padding-top: 32px;
  padding-bottom: 20px;
}

.hero h1 {
  margin: 0 0 8px;
  font-size: 38px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.subtitle {
  margin: 0 auto 12px;
  max-width: 720px;
  font-size: 20px;
  font-weight: 400;
  line-height: 1.35;
  color: var(--text-light);
}

.authors {
  margin: 0 0 4px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-muted);
}

.author-link {
  color: var(--link);
  text-decoration: none;
}

.author-link:hover {
  text-decoration: underline;
}

.affil-mark {
  font-size: 0.7em;
  font-weight: 600;
  line-height: 0;
  margin-left: 1px;
  color: var(--text-muted);
  vertical-align: super;
}

.author-link + .affil-mark {
  color: var(--link);
}

.affiliation {
  margin: 0 0 18px;
  font-size: 14px;
  color: var(--text-muted);
}

.affiliation .affil-mark {
  margin-right: 2px;
  margin-left: 0;
}

/* Nerfies-style pill buttons */
.button-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 0;
}

.button-row a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: none;
  padding: 10px 18px;
  border-radius: 999px;
  text-decoration: none;
  color: #ffffff;
  background: var(--btn-bg);
  font-size: 14px;
  font-weight: 500;
  line-height: 1;
}

.button-row a:hover {
  background: var(--btn-bg-hover);
  color: #ffffff;
}

.button-row a i {
  font-size: 0.95em;
  opacity: 0.95;
}

/* Abstract (Nerfies-style prose block) */
.section-abstract {
  margin-top: 28px;
}

.section-abstract h2 {
  margin-bottom: 16px;
}

.abstract-text {
  max-width: var(--prose-max-width);
  margin: 0 auto;
  font-size: 15px;
  color: var(--text);
  line-height: 1.6;
  text-align: justify;
}

.abstract-text p {
  margin: 0 0 14px;
}

.abstract-text p:last-child {
  margin-bottom: 0;
}

.abstract-text strong {
  font-weight: 600;
}

/* Sections */
.section {
  margin-top: 40px;
}

.section h2 {
  margin: 0 0 14px;
  font-size: 26px;
  font-weight: 700;
  text-align: center;
  color: var(--text);
}

.section-lead {
  margin: -4px auto 14px;
  max-width: 720px;
  text-align: center;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.45;
}

/* Figures — wide banners, centered, not full container width */
.figure {
  margin: 0 auto;
  max-width: var(--figure-max-width);
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
}

.figure img {
  width: 100%;
  height: auto;
  display: block;
  vertical-align: middle;
}

.caption {
  margin: 10px auto 0;
  max-width: 720px;
  color: var(--text-muted);
  text-align: center;
  font-size: 14px;
  line-height: 1.4;
}

.stats-bar {
  margin: 12px 0 10px;
  text-align: center;
  font-size: 12px;
  color: #777777;
  letter-spacing: 0.01em;
}

/* Legend */
.legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.legend li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

.legend-swatch {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 1px solid rgba(0, 0, 0, 0.12);
  flex-shrink: 0;
}

.legend-swatch--building {
  background: var(--class-building);
}

.legend-swatch--impervious {
  background: var(--class-impervious);
}

.legend-swatch--tree {
  background: var(--class-tree);
}

.legend-swatch--herbaceous {
  background: var(--class-herbaceous);
}

.legend-swatch--water {
  background: var(--class-water);
}

.legend-swatch--bare {
  background: var(--class-bare);
}

/* Interactive map */
.map-host {
  position: relative;
  height: 440px;
  border: 1px solid var(--border-mid);
  background: #f0f0f0;
  border-radius: 8px;
  overflow: hidden;
}

.map-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: #e8e8e8;
}

.map-host .leaflet-container {
  width: 100%;
  height: 100%;
  font-family: inherit;
}

.map-status {
  position: absolute;
  left: 12px;
  top: 12px;
  max-width: calc(100% - 220px);
  z-index: 1001;
  margin: 0;
  padding: 8px 10px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--border-mid);
  font-size: 12px;
  color: var(--text-muted);
  pointer-events: none;
}

.map-status--error {
  color: #8b0000;
  border-color: #e8b4b4;
  background: rgba(255, 245, 245, 0.95);
}

.map-host--ready .map-status[hidden] {
  display: none !important;
}

.map-layers {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 1000;
  margin: 0;
  padding: 12px 14px;
  background: var(--surface);
  border: 1px solid var(--border-mid);
  border-radius: 6px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
  font-size: 13px;
  min-width: 188px;
  pointer-events: auto;
}

.map-layers h4 {
  margin: 0 0 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}

.map-layers ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.map-layers li {
  margin-bottom: 6px;
}

.map-layers li:last-child {
  margin-bottom: 0;
}

.map-layers label {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  cursor: pointer;
}

.map-layers input[type="checkbox"] {
  margin: 0;
  accent-color: var(--accent);
  cursor: pointer;
}

.map-layer-opacity {
  margin-top: 4px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}

.map-layer-opacity-label {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  color: var(--text-muted);
}

.map-layer-opacity-label output {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--text);
}

.map-layers input[type="range"] {
  width: 100%;
  margin: 0;
  accent-color: var(--btn-bg);
}

.map-legend {
  position: absolute;
  left: 12px;
  bottom: 12px;
  z-index: 1000;
  pointer-events: none;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--border-mid);
  border-radius: 6px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

.map-legend .legend {
  justify-content: flex-start;
  gap: 8px 14px;
}

.map-legend .legend li {
  font-size: 12px;
}

.site-footer {
  margin-top: 44px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 13px;
  color: #888888;
}

/* Responsive */
@media (max-width: 640px) {
  .container {
    padding: 20px 16px 32px;
  }

  .hero {
    padding-top: 24px;
    padding-bottom: 16px;
  }

  .hero h1 {
    font-size: 32px;
  }

  .subtitle {
    font-size: 18px;
  }

  .section h2 {
    font-size: 24px;
  }

  .map-host {
    height: 360px;
  }

  .map-layers {
    top: 12px;
    right: 12px;
    min-width: 150px;
    padding: 10px 12px;
  }

  .map-legend {
    left: 12px;
    right: 12px;
    bottom: 12px;
  }

  .map-legend .legend {
    justify-content: center;
  }

  .abstract-text {
    text-align: left;
    font-size: 14px;
  }

  .button-row a {
    padding: 9px 16px;
    font-size: 13px;
  }
}