@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap");

:root {
  /* Surfaces */
  --bg: #f3f4f7;
  --panel: #ffffff;
  --surface-muted: #f6f7fa;
  --surface-sunken: #eef0f4;

  /* Borders */
  --line: #e7e9ef;
  --line-strong: #d9dce4;

  /* Text */
  --ink: #14161f;
  --ink-soft: #454a58;
  --muted: #868b9b;

  /* Brand (kept green — Penda) */
  --green: #1a9563;
  --green-dark: #12704a;
  --green-soft: #e5f6ee;
  --green-line: rgba(26, 149, 99, 0.22);

  /* Accents */
  --red: #d64545;
  --red-soft: #fdeaea;
  --blue: #3b6fe0;
  --blue-soft: #eaf0ff;
  --amber: #b8760f;
  --amber-soft: #fdf1de;

  /* Elevation */
  --shadow-xs: 0 1px 2px rgba(20, 23, 35, 0.05);
  --shadow-sm: 0 6px 16px -6px rgba(20, 23, 35, 0.10);
  --shadow-md: 0 14px 32px -10px rgba(20, 23, 35, 0.16);
  --shadow-lg: 0 28px 60px -18px rgba(20, 23, 35, 0.24);

  /* Radii */
  --r-sm: 10px;
  --r-md: 14px;
  --r-lg: 20px;
  --r-xl: 26px;
  --r-pill: 999px;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-feature-settings: "ss01" 1;
}

button,
input,
select,
textarea {
  font: inherit;
}

::selection {
  background: var(--green-soft);
  color: var(--green-dark);
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--line-strong);
  border-radius: var(--r-pill);
  border: 2px solid var(--bg);
}

/* ---------- App shell ---------- */

.worldpop-app {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(340px, 400px) 1fr;
  background: var(--bg);
}

.control-panel {
  background: var(--panel);
  border-radius: 0 var(--r-xl) var(--r-xl) 0;
  box-shadow: var(--shadow-lg);
  padding: 26px 24px 32px;
  display: grid;
  align-content: start;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 5;
  max-height: 100vh;
  overflow-y: auto;
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  padding-bottom: 6px;
}

.brand-mark {
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  background: linear-gradient(155deg, var(--green) 0%, var(--green-dark) 100%);
  color: white;
  font-weight: 900;
  font-size: 16px;
  border-radius: var(--r-md);
  box-shadow: 0 8px 18px -6px rgba(26, 149, 99, 0.55);
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--ink);
}

.brand p,
.result-card p,
.details-card p,
.details-card dd {
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.5;
}

.brand p {
  margin-top: 2px;
}

/* ---------- Forms ---------- */

.worldpop-form {
  display: grid;
  gap: 13px;
  background: var(--surface-muted);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 16px;
}

label {
  display: grid;
  gap: 6px;
  color: var(--ink-soft);
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  padding: 11px 12px;
  border-radius: var(--r-sm);
  font-size: 13.5px;
  transition: border-color 120ms ease, box-shadow 120ms ease;
}

input::placeholder,
textarea::placeholder {
  color: #a8adba;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  box-shadow: 0 0 0 4px var(--green-soft);
  border-color: var(--green);
}

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

.primary-action {
  border: 0;
  background: var(--green);
  background: linear-gradient(155deg, var(--green) 0%, var(--green-dark) 100%);
  color: white;
  border-radius: var(--r-sm);
  padding: 13px 16px;
  font-weight: 800;
  font-size: 13.5px;
  cursor: pointer;
  box-shadow: 0 10px 20px -8px rgba(26, 149, 99, 0.55);
  transition: transform 120ms ease, box-shadow 120ms ease, opacity 120ms ease;
}

.primary-action:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 14px 26px -8px rgba(26, 149, 99, 0.6);
}

.primary-action:active:not(:disabled) {
  transform: translateY(0);
}

.primary-action:disabled {
  cursor: wait;
  opacity: 0.65;
  box-shadow: none;
}

/* ---------- Cards ---------- */

.result-card,
.details-card {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: #fff;
  padding: 18px;
  box-shadow: var(--shadow-xs);
}

.result-card {
  background: linear-gradient(165deg, var(--blue-soft) 0%, #fff 65%);
  border-color: rgba(59, 111, 224, 0.16);
  position: relative;
  overflow: hidden;
}

.result-card.success {
  background: linear-gradient(165deg, var(--green-soft) 0%, #fff 65%);
  border-color: var(--green-line);
}

.result-card.error {
  background: linear-gradient(165deg, var(--red-soft) 0%, #fff 65%);
  border-color: rgba(214, 69, 69, 0.2);
}

.result-card span {
  display: block;
  color: var(--blue);
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.result-card.success span,
.result-card.success strong {
  color: var(--green-dark);
}

.result-card.error span,
.result-card.error strong {
  color: var(--red);
}

.result-card strong {
  display: block;
  margin-top: 10px;
  color: var(--blue);
  font-size: 44px;
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1;
}

.result-card p {
  margin-top: 10px;
}

.details-card h2 {
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  margin-bottom: 10px;
}

/* <details class="details-card"> accordion variant */
details.details-card {
  padding: 0;
  overflow: hidden;
}

details.details-card summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 18px;
  font-size: 12.5px;
  font-weight: 800;
  color: var(--ink-soft);
}

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

details.details-card summary::after {
  content: "+";
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--surface-muted);
  color: var(--muted);
  font-weight: 900;
  font-size: 13px;
}

details.details-card[open] summary::after {
  content: "–";
}

details.details-card[open] summary {
  border-bottom: 1px solid var(--line);
}

details.details-card .details-card-body {
  padding: 14px 18px 18px;
  display: grid;
  gap: 8px;
}

details.details-card .details-card-body h2 {
  margin-top: 6px;
}

details.details-card .details-card-body h2:first-child {
  margin-top: 0;
}

.panel-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  padding: 4px 4px 0;
}

.panel-footer-links a {
  color: var(--muted);
  font-size: 11.5px;
  font-weight: 800;
  text-decoration: none;
  border-bottom: 1px dotted var(--line-strong);
}

.panel-footer-links a:hover {
  color: var(--green-dark);
  border-color: var(--green);
}

.details-card ul {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.55;
}

.details-card dl,
.details-card dd {
  margin: 0;
}

.details-card dl {
  display: grid;
  gap: 11px;
}

.details-card dt {
  color: var(--muted);
  font-size: 10.5px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.source-links,
.share-links {
  display: grid;
  gap: 7px;
  margin-top: 12px;
}

.source-links a,
.share-links a {
  color: var(--blue);
  font-size: 12.5px;
  font-weight: 800;
  overflow-wrap: anywhere;
  text-decoration: none;
}

.source-links a:hover,
.share-links a:hover {
  text-decoration: underline;
}

.share-links code {
  background: var(--surface-sunken);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 2px 6px;
  font-size: 11.5px;
}

/* ---------- Map ---------- */

.map-panel {
  min-height: 100vh;
  padding: 20px 20px 20px 12px;
}

.worldpop-map {
  height: calc(100vh - 40px);
  min-height: 520px;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  background: var(--surface-sunken);
}

.map-fallback {
  height: 100%;
  display: grid;
  place-items: center;
  color: var(--muted);
  font-weight: 800;
  padding: 24px;
  text-align: center;
}

.leaflet-control-zoom a {
  border-radius: var(--r-sm) !important;
  color: var(--ink) !important;
}

@media (max-width: 900px) {
  .worldpop-app {
    grid-template-columns: 1fr;
  }

  .control-panel {
    border-radius: 0;
    max-height: none;
  }

  .map-panel {
    min-height: 520px;
    padding: 12px;
  }

  .worldpop-map {
    height: 520px;
  }
}

@media (max-width: 520px) {
  .coordinate-grid {
    grid-template-columns: 1fr;
  }

  .result-card strong {
    font-size: 36px;
  }
}