/* Atlas de los ríos de Europa — estilos
 * Paleta coherente (un color = un concepto):
 *   río principal #0A4F9C · afluente #2F8FE0 · cuenca #2E86C1 (relleno suave) · lago #A9DDEE
 *   embalse #7E5BB4 (rayado) · nacimiento #2E9E57 (triángulo) · desembocadura #E07B1F (cuadrado)
 *   montañas #8B5E3C · fronteras #6F6354 (discontinuo) · ciudad #2B2B2B
 */
:root {
  --fondo: #F7F3EA;
  --tarjeta: #FFFFFF;
  --tinta: #1F2A37;
  --tinta-suave: #4B5563;
  --linea: #E6DFD0;
  --rio: #0A4F9C;
  --afluente: #2F8FE0;
  --cuenca: #2E86C1;
  --embalse: #7E5BB4;
  --nace: #2E9E57;
  --desemboca: #E07B1F;
  --montana: #8B5E3C;
  --foco: #F2A900;
  --radio: 16px;
  --sombra: 0 6px 20px rgba(60, 50, 30, .16), 0 1px 3px rgba(60, 50, 30, .12);
  --alto-barra: 64px;
  --alto-panel: 0px;
  --fuente: "Nunito", "Segoe UI Rounded", "Trebuchet MS", "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0; display: flex; flex-direction: column; height: 100dvh;
  background: var(--fondo); color: var(--tinta);
  font-family: var(--fuente); font-size: 17px; line-height: 1.5;
}
h1, h2, h3, h4 { line-height: 1.2; margin: 0; }
p { margin: 0 0 .6em; }
button, input, select { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--foco); outline-offset: 2px; border-radius: 6px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.saltar { position: absolute; left: 8px; top: -60px; z-index: 5000; background: #fff; padding: 8px 14px; border-radius: 10px; box-shadow: var(--sombra); }
.saltar:focus { top: 8px; }
.sin-js { padding: 16px; background: #fff3cd; margin: 0; }

/* ---------- Barra superior ---------- */
.barra {
  display: grid; grid-template-columns: auto minmax(200px, 1fr) auto auto; gap: 12px; align-items: center;
  padding: 8px 14px; background: var(--tarjeta); border-bottom: 1px solid var(--linea);
  box-shadow: 0 2px 8px rgba(60, 50, 30, .08); position: relative; z-index: 1200;
}
.marca { display: flex; align-items: center; gap: 10px; min-width: 0; }
.marca-icono { width: 42px; height: 42px; flex: none; }
.barra h1 { font-size: 1.2rem; font-weight: 800; letter-spacing: -.01em; }
.lema { font-size: .82rem; color: var(--tinta-suave); margin: 0; }

.buscador { position: relative; display: flex; align-items: center; max-width: 520px; width: 100%; justify-self: center; }
.buscador input {
  width: 100%; padding: 10px 46px 10px 16px; border-radius: 999px; border: 2px solid var(--linea); background: #FFFDF8;
}
.buscador input:focus { border-color: var(--afluente); outline-offset: 1px; }
.btn-icono {
  position: absolute; right: 4px; top: 50%; transform: translateY(-50%); width: 38px; height: 38px; border: 0; border-radius: 50%;
  background: var(--rio); color: #fff; display: grid; place-items: center; cursor: pointer;
}
.btn-icono svg { width: 20px; height: 20px; }
#sugerencias {
  position: absolute; top: calc(100% + 6px); left: 0; right: 0; margin: 0; padding: 6px; list-style: none; background: #fff; border-radius: 14px;
  box-shadow: var(--sombra); max-height: 50vh; overflow: auto; z-index: 3000;
}
#sugerencias li { padding: 8px 12px; border-radius: 10px; cursor: pointer; display: flex; justify-content: space-between; gap: 10px; }
#sugerencias li small { color: var(--tinta-suave); }
#sugerencias li[aria-selected="true"], #sugerencias li:hover { background: #E8F2FB; }
#sugerencias .vacio { cursor: default; color: var(--tinta-suave); }

.selector { display: flex; align-items: center; gap: 8px; }
.selector label { font-weight: 700; font-size: .9rem; }
.selector select {
  padding: 9px 34px 9px 14px; border-radius: 999px; border: 2px solid var(--linea); background: #FFFDF8; max-width: 210px;
  appearance: none; -webkit-appearance: none; cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='m6 9 6 6 6-6' fill='none' stroke='%231F2A37' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 10px center; background-size: 16px;
}

.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 9px 16px; border: 0; border-radius: 999px; cursor: pointer;
  background: var(--rio); color: #fff; font-weight: 700; transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn svg { width: 20px; height: 20px; flex: none; }
.btn:hover { background: #0C63BC; transform: translateY(-1px); }
.btn-claro { background: var(--tarjeta); color: var(--tinta); box-shadow: var(--sombra); }
.btn-claro:hover { background: #F1F7FC; }
.btn[aria-expanded="true"].btn-claro { background: #E1EEF9; }

/* ---------- Escena ---------- */
.escena { position: relative; flex: 1; min-height: 0; }
.zona-mapa { position: absolute; inset: 0; }
#mapa { position: absolute; inset: 0; background: #DDE9EC; }
#mapa:focus { outline: none; }

.carga {
  position: absolute; left: 50%; top: 12px; transform: translateX(-50%); z-index: 1100; display: flex; align-items: center; gap: 10px;
  background: var(--tarjeta); padding: 8px 16px; border-radius: 999px; box-shadow: var(--sombra); font-size: .92rem; transition: opacity .3s;
}
.carga.oculta { opacity: 0; pointer-events: none; }
.carga-rueda { width: 16px; height: 16px; border-radius: 50%; border: 3px solid #cfe3f5; border-top-color: var(--rio); animation: gira .9s linear infinite; }
@keyframes gira { to { transform: rotate(360deg); } }

.avisos { position: absolute; left: 50%; top: 56px; transform: translateX(-50%); z-index: 1100; display: grid; gap: 8px; width: min(560px, calc(100% - 24px)); }
.aviso { background: #FFF6DC; border: 1px solid #F0D88A; padding: 10px 14px; border-radius: 14px; box-shadow: var(--sombra); font-size: .92rem; display: flex; gap: 10px; align-items: flex-start; }
.aviso p { margin: 0; flex: 1; }
.aviso button { border: 0; background: #fff; border-radius: 999px; padding: 4px 12px; cursor: pointer; font-weight: 700; box-shadow: 0 1px 3px rgba(0, 0, 0, .15); }

.herramientas { position: absolute; top: 10px; left: 58px; z-index: 1000; display: flex; gap: 8px; flex-wrap: wrap; }
.herramientas .btn { padding: 8px 14px; font-size: .92rem; }

.tarjeta { background: var(--tarjeta); border-radius: var(--radio); box-shadow: var(--sombra); }
.capas { position: absolute; top: 58px; left: 58px; z-index: 1000; padding: 12px 16px; display: grid; gap: 10px; max-height: calc(100% - 140px); overflow: auto; }
.capas[hidden], .leyenda[hidden] { display: none; }
.capas fieldset { border: 0; margin: 0; padding: 0; display: grid; gap: 4px; }
.capas legend { font-weight: 800; margin-bottom: 4px; padding: 0; }
.capas label { display: flex; align-items: center; gap: 8px; cursor: pointer; padding: 2px 0; }
.capas input { width: 18px; height: 18px; accent-color: var(--rio); }

.leyenda { position: absolute; left: 12px; bottom: 44px; z-index: 900; padding: 12px 14px; width: 250px; max-height: calc(100% - 150px); overflow: auto; }
.leyenda h2 { font-size: 1rem; margin-bottom: 6px; }
.leyenda-lista { list-style: none; margin: 0 0 8px; padding: 0; display: grid; gap: 3px; font-size: .88rem; }
.leyenda-lista li { display: grid; grid-template-columns: 46px 1fr; align-items: center; gap: 8px; }
.leyenda-lista svg { width: 46px; height: 16px; }
.que-es { font-size: .86rem; border-top: 1px solid var(--linea); padding-top: 8px; }
.que-es summary { cursor: pointer; font-weight: 800; color: var(--rio); }
.que-es p { margin: 6px 0 0; }

/* ---------- Panel educativo ---------- */
.panel {
  position: absolute; z-index: 1000; top: 12px; right: 12px; bottom: 12px; width: min(410px, 38vw); background: var(--tarjeta);
  border-radius: 20px; box-shadow: var(--sombra); display: flex; flex-direction: column; overflow: hidden;
}
.panel-toggle { display: none; }
.panel-contenido { flex: 1; overflow: auto; padding: 18px 20px 24px; scroll-behavior: smooth; }
.panel-contenido:focus { outline: none; }
.panel h2 { font-size: 1.45rem; font-weight: 800; color: var(--rio); outline: none; }
.panel h3 { font-size: 1.05rem; margin: 20px 0 8px; display: flex; align-items: center; gap: 8px; color: var(--tinta); }
.panel h3::before { content: ""; width: 10px; height: 10px; border-radius: 50%; background: var(--afluente); flex: none; }
.panel p, .panel li { font-size: 1rem; }
.entra { animation: entra .45s ease both; }
@keyframes entra { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.insignia { display: inline-flex; align-items: center; gap: 6px; padding: 3px 10px; border-radius: 999px; background: #E8F2FB; color: var(--rio); font-weight: 700; font-size: .85rem; margin: 6px 6px 0 0; }
.insignia.aviso-datos { background: #FFF1D6; color: #7A4B00; }

.bienvenida h2 { font-size: 1.5rem; }
.bienvenida .lead { font-size: 1.08rem; margin-top: 8px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 0; padding: 0; list-style: none; }
.chip { border: 2px solid #CFE3F5; background: #F3F9FE; color: var(--rio); border-radius: 999px; padding: 5px 12px; cursor: pointer; font-weight: 700; font-size: .92rem; }
.chip:hover { background: #E1EEF9; }
.pistas { padding-left: 20px; margin: 0; }
.pistas li { margin-bottom: 4px; }

.datos { display: grid; gap: 8px; margin: 0; }
.datos div { display: grid; grid-template-columns: 112px 1fr; gap: 10px; padding: 8px 0; border-bottom: 1px dashed var(--linea); }
.datos dt { font-weight: 800; color: var(--tinta-suave); font-size: .92rem; }
.datos dd { margin: 0; }
.nota { display: block; font-size: .84rem; color: var(--tinta-suave); margin-top: 2px; }
.lista-simple { margin: 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.lista-simple li { padding: 8px 12px; background: #F6F9FC; border-radius: 12px; }
.lista-simple strong { color: var(--rio); }
.btn-enlace { border: 0; background: none; padding: 0; color: var(--rio); font-weight: 800; cursor: pointer; text-decoration: underline; text-underline-offset: 3px; }
.etiqueta { display: inline-block; margin-left: 6px; padding: 1px 8px; border-radius: 999px; background: #EFEAE0; color: var(--tinta-suave); font-size: .78rem; font-weight: 700; }

.pasos { list-style: none; counter-reset: paso; margin: 0; padding: 0; display: grid; gap: 10px; }
.pasos li { counter-increment: paso; position: relative; padding-left: 40px; }
.pasos li::before {
  content: counter(paso); position: absolute; left: 0; top: 0; width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center;
  background: var(--afluente); color: #fff; font-weight: 800; font-size: .9rem;
}
.curiosidades { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.curiosidades li { position: relative; padding-left: 28px; }
.curiosidades li::before { content: "★"; position: absolute; left: 4px; top: 0; color: #D9972B; }
.sabias {
  margin-top: 18px; padding: 14px 16px; background: linear-gradient(135deg, #FFF6DC, #FFF0C2); border: 2px solid #F0D88A; border-radius: 16px;
}
.sabias strong { display: block; font-size: 1.05rem; margin-bottom: 4px; }
.fuente-datos { margin-top: 20px; padding-top: 12px; border-top: 1px solid var(--linea); font-size: .84rem; color: var(--tinta-suave); }

/* ---------- Mapa: etiquetas y marcadores ---------- */
.leaflet-container { font-family: var(--fuente); background: #DDE9EC; }
.etq-pais { color: #4A4034; font-size: 11px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; text-shadow: 0 0 3px #fff, 0 0 3px #fff, 0 0 5px #fff; white-space: nowrap; pointer-events: none; text-align: center; }
.etq-relieve { font-size: 12px; font-weight: 800; white-space: nowrap; pointer-events: none; text-align: center; text-shadow: 0 0 3px #fff, 0 0 3px #fff, 0 0 4px #fff; }
.etq-relieve.cordillera, .etq-relieve.meseta { color: var(--montana); }
.etq-relieve.cordillera::before { content: "▲ "; font-size: 10px; }
.etq-relieve.llanura { color: #3E7A3A; font-style: italic; }
.etq-lago { font-size: 11px; font-style: italic; color: #1E5F82; text-shadow: 0 0 3px #fff, 0 0 3px #fff; white-space: nowrap; pointer-events: none; }
.etq-embalse { font-size: 11px; font-style: italic; color: #523482; text-shadow: 0 0 3px #fff, 0 0 3px #fff; white-space: nowrap; pointer-events: none; }
.marcador-svg { filter: drop-shadow(0 1px 2px rgba(0, 0, 0, .45)); }
.ciudad-dot { position: relative; width: 0; height: 0; }
.ciudad-dot i { position: absolute; left: -7px; top: -7px; width: 14px; height: 14px; border-radius: 50%; background: #2B2B2B; border: 2.5px solid #fff; box-shadow: 0 1px 3px rgba(0, 0, 0, .5); }
.ciudad-dot.capital i { background: #fff; border-color: #2B2B2B; }
.ciudad-dot b { position: absolute; left: 10px; top: -10px; font-size: 12.5px; font-weight: 800; color: #1c1c1c; white-space: nowrap; text-shadow: 0 0 3px #fff, 0 0 3px #fff, 0 0 4px #fff; }
.leaflet-interactive:focus-visible { filter: drop-shadow(0 0 3px var(--foco)) drop-shadow(0 0 3px var(--foco)); outline: none; }
.leaflet-marker-icon:focus-visible { outline: 3px solid var(--foco); outline-offset: 2px; border-radius: 4px; }

.tip.leaflet-tooltip { background: #fff; color: var(--tinta); border: 0; border-radius: 10px; box-shadow: var(--sombra); font-weight: 800; padding: 5px 10px; font-size: .9rem; }
.tip.leaflet-tooltip::before { display: none; }

/* Animación suave del río (se dibuja de la fuente a la desembocadura) */
.rio-anim { stroke-dasharray: 1; stroke-dashoffset: 1; animation: trazo 1.5s ease-out forwards; }
.rio-anim.afl { animation-duration: 1.1s; }
@keyframes trazo { to { stroke-dashoffset: 0; } }
.destello { animation: destello 1.2s ease-in-out 2; }
@keyframes destello { 50% { stroke-opacity: .3; } }

/* Ventanas emergentes */
.leaflet-popup-content-wrapper { border-radius: 18px; padding: 2px; box-shadow: var(--sombra); }
.leaflet-popup-content { margin: 12px 16px 14px; font-size: .98rem; line-height: 1.45; width: auto !important; max-width: 290px; }
.leaflet-popup-content h3 { font-size: 1.12rem; color: var(--rio); margin-bottom: 6px; padding-right: 18px; }
.leaflet-popup-content ul { margin: 0 0 8px; padding-left: 18px; }
.leaflet-popup-content li { margin-bottom: 2px; }
.leaflet-popup-content .pop-sabias { margin: 8px 0 0; padding: 8px 10px; background: #FFF6DC; border-radius: 12px; border: 1px solid #F0D88A; }
.leaflet-popup-content .pop-sabias strong { display: block; }
.leaflet-popup-close-button { width: 34px !important; height: 34px !important; font-size: 24px !important; line-height: 32px !important; top: 4px !important; right: 4px !important; color: var(--tinta) !important; border-radius: 50%; }
.leaflet-popup-close-button:hover { background: #F1F1F1; }
.leaflet-control-zoom a { width: 36px; height: 36px; line-height: 36px; }
.leaflet-control-zoom { border: 0 !important; box-shadow: var(--sombra) !important; border-radius: 12px; overflow: hidden; }
.leaflet-control-scale-line { background: rgba(255, 255, 255, .85); border-color: #5B5B5B; font-weight: 700; color: #222; }
.leaflet-control-attribution { font-size: 11px; background: rgba(255, 255, 255, .85) !important; }
.brujula { background: var(--tarjeta); border-radius: 12px; box-shadow: var(--sombra); width: 36px; padding: 4px 0 2px; text-align: center; font-weight: 800; font-size: .72rem; line-height: 1; }
.brujula svg { display: block; width: 22px; height: 24px; margin: 0 auto 2px; }

/* ---------- Diálogo de fuentes ---------- */
.dialogo { border: 0; border-radius: 20px; padding: 22px 26px 26px; width: min(720px, calc(100% - 24px)); max-height: 86dvh; box-shadow: 0 20px 60px rgba(0, 0, 0, .35); color: var(--tinta); }
.dialogo::backdrop { background: rgba(30, 30, 30, .45); }
.dialogo h2 { color: var(--rio); margin-bottom: 8px; }
.dialogo h3 { margin: 16px 0 6px; font-size: 1.05rem; }
.dialogo p, .dialogo li { font-size: .96rem; }
.dialogo ul { padding-left: 20px; margin: 0 0 6px; }
.dialogo-cierre { position: sticky; top: 0; text-align: right; margin: -6px 0 6px; }
.tabla-estado { width: 100%; border-collapse: collapse; font-size: .9rem; }
.tabla-estado th, .tabla-estado td { text-align: left; padding: 5px 8px; border-bottom: 1px solid var(--linea); vertical-align: top; }

/* ---------- Adaptación a pantallas pequeñas ---------- */
@media (max-width: 960px) {
  .barra { grid-template-columns: 1fr auto; row-gap: 8px; }
  .buscador { grid-column: 1 / -1; grid-row: 2; max-width: none; }
  .selector { grid-row: 3; grid-column: 1; }
  #btnInicio { grid-row: 3; grid-column: 2; }
  .lema { display: none; }
  .selector select { max-width: 100%; flex: 1; }
  .selector { min-width: 0; }
  .selector label { display: none; }
}
@media (max-width: 760px) {
  body { font-size: 16px; }
  .panel {
    top: auto; left: 8px; right: 8px; bottom: 8px; width: auto; height: min(46dvh, 460px); border-radius: 20px 20px 16px 16px;
  }
  .panel.colapsado { height: auto; }
  .panel.colapsado .panel-contenido { display: none; }
  .panel-toggle {
    display: flex; flex-direction: column; align-items: center; gap: 4px; width: 100%; border: 0; background: #F4F8FB; padding: 8px 12px 8px; cursor: pointer; font-weight: 800; font-size: .88rem; color: var(--tinta-suave);
  }
  .panel-asa { width: 44px; height: 5px; border-radius: 3px; background: #C5CFD8; }
  .leaflet-bottom { bottom: var(--alto-panel); }
  .leyenda { left: 8px; right: 8px; width: auto; bottom: auto; top: 54px; max-height: 45%; z-index: 1001; }
  .capas { left: 8px; right: 8px; top: 54px; z-index: 1001; }
  .herramientas { left: 52px; top: 8px; gap: 6px; }
  .herramientas .btn { padding: 7px 11px; font-size: .86rem; }
  .herramientas .btn svg { width: 17px; height: 17px; }
  .datos div { grid-template-columns: 96px 1fr; }
  .leaflet-control-attribution { max-width: 70vw; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .rio-anim { stroke-dasharray: none; stroke-dashoffset: 0; }
}

/* ---------- Móvil: cabecera compacta y más mapa visible ---------- */
@media (max-width: 760px) {
  .barra { grid-template-columns: 1fr auto; padding: 6px 10px; row-gap: 6px; column-gap: 8px; }
  .marca-icono { width: 30px; height: 30px; }
  .barra h1 { font-size: 1rem; }
  #btnInicio { grid-row: 1; grid-column: 2; padding: 8px 12px; }
  #btnInicio span { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .buscador { grid-row: 2; grid-column: 1; }
  .buscador input { padding: 8px 44px 8px 14px; }
  .selector { grid-row: 2; grid-column: 2; }
  .selector select { max-width: 150px; padding: 8px 30px 8px 12px; }
  .panel { height: min(36dvh, 330px); }
  .panel-contenido { padding: 12px 16px 20px; }
  .panel h2 { font-size: 1.25rem; }
}