:root {
  --primary-bg: #ffffff;
  --accent-color: #222;
  --secondary-bg: #f4f4f4;
  --transition-speed: 0.5s;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  margin: 0;
}

body {
  font-family: 'Georgia', serif;
  line-height: 1.6;
  color: #333;
}

/* HEADER */

.split-header {
  display: flex;
  height: 100vh;
  width: 100%;
}

.header-image {
  flex: 1;
  background-size: cover;
  background-position: center;
}

.header-content {
  flex: 1;
  display: flex;
  align-items: center;
  padding: 10%;
  color: #ffffff;
  background-color: #183158;
}

.title-wrapper h1 {
  font-size: 2.5rem;
  margin: 0.5rem 0;
  text-transform: uppercase;
  font-weight: 900;
}

/* MAP SECTION */

.interactive-container {
  position: relative;
  width: 100%;
  margin: 0 auto;
}

.map-wrapper {
  position: relative;
  width: 100%;
  height: 70vh;
  min-height: 500px;
  max-height: 850px;
  overflow: hidden;
}

.dual-map {
  width: 100%;
  height: 100%;
  background: #173158;
}

#world-map.dimmed,
#chicago-map.dimmed {
  filter: blur(1.5px) brightness(0.8);
}

/* INSTRUCTION */

.instruction-box {
  max-width: 800px;
  margin: 40px auto;
  text-align: center;
  font-style: italic;
  color: #666;
}

.between-maps {
  margin: 32px auto;
  padding: 0 20px;
}

/* AUDIO */

.audio-bar {
  background: var(--secondary-bg);
  padding: 20px;
  text-align: center;
  border-top: 1px solid #ddd;
  border-bottom: 1px solid #ddd;
}

/* ARTICLE */

.long-form {
  max-width: 700px;
  margin: 100px auto;
  padding: 0 20px;
}

/* APP */

#app {
  position: relative;
  width: 100%;
  height: 100%;
}

/* OVERLAY */

.overlay {
  position: fixed;
  inset: 0;
  z-index: 999;
  pointer-events: none;
  opacity: 0;
  background: rgba(0, 0, 0, 0.15);
  transition: opacity 0.4s ease;
}

.overlay.active {
  pointer-events: all;
  opacity: 1;
}

/* PANEL */

.panel {
  position: fixed;
  top: 0;
  right: 0;
  height: 100%;
  width: 60%;
  background: #fff;
  box-shadow: -8px 0 40px rgba(0, 0, 0, 0.2);
  z-index: 1001;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  opacity: 0;
  transition:
    transform 0.4s cubic-bezier(0.22, 1, 0.36, 1),
    opacity 0.4s ease;
}

.panel.open {
  transform: translateX(0);
  opacity: 1;
}

#panel-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 50%;
  cursor: pointer;
  color: #333;
  z-index: 2;
  display: grid;
  place-items: center;
  padding: 0;
  font: 20px/1 sans-serif;
}

.panel-body {
  flex: 1;
  overflow-y: auto;
}

#panel-image {
  width: 100%;
  height: 320px;
  object-fit: cover;
  display: none;
}

#panel-image.visible {
  display: block;
}

.panel-text {
  padding: 36px 40px;
}

#panel-title {
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 32px;
  font-weight: 600;
  margin-bottom: 24px;
  color: #1a1a1a;
  line-height: 1.2;
}

#panel-content {
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 17px;
  line-height: 1.8;
  color: #2a2a2a;
}

#panel-content p {
  margin-bottom: 20px;
}

/* MARKERS */

.leaflet-marker-icon {
  transition: transform 0.15s ease;
  cursor: pointer;

}

.leaflet-marker-icon:hover {
  transform: scale(1.25);
}

.marker-active {
  transform: scale(1.15);

  filter:
    drop-shadow(0 0 10px rgba(221, 133, 1, 0.65));
}

.leaflet-tooltip-top {
  white-space: nowrap;
}

/* MOBILE */

@media (max-width: 700px) {

  .map-wrapper {
    height: 55vh;
    min-height: 420px;
  }

  .panel {
    width: 100%;
  }

}
.header-image {
  position: relative;
}

.image-caption {
  position: absolute;
  right: 16px;
  bottom: 16px;

  padding: 8px 12px;

  background: rgba(120,120,120,.92);
  color: white;

  border-radius: 4px;

  border-top: 1px solid rgba(255,255,255,.4);
  border-left: 1px solid rgba(255,255,255,.4);
  border-right: 1px solid rgba(0,0,0,.25);
  border-bottom: 1px solid rgba(0,0,0,.25);

  box-shadow:
    inset 1px 1px 0 rgba(255,255,255,.15),
    inset -1px -1px 0 rgba(0,0,0,.15),
    2px 2px 8px rgba(0,0,0,.25);

  /* hidden by default */
  visibility: hidden;
  opacity: 0;

  transition: opacity .2s ease;
  pointer-events: none;
}

.header-image:hover .image-caption {
  visibility: visible;
  opacity: 1;
}