:root {
  --color-bg: #f7f7f9;
  --color-surface: #ffffff;
  --color-border: #e0e0e6;
  --color-text: #1f1f27;
  --color-text-muted: #6b6b76;
  --color-primary: #4a63e7;
  --color-primary-text: #ffffff;
  --color-danger: #d64545;
  --shadow-card: 0 2px 10px rgba(0, 0, 0, 0.08);
  --header-height: 56px;
  --sidebar-width: 320px;
}

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

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-tap-highlight-color: transparent;
}

h1, h2, h3, p, ul, form {
  margin: 0;
}

ul {
  list-style: none;
  padding: 0;
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

input, button {
  font-family: inherit;
}

a {
  color: var(--color-primary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.65em 1.1em;
  border: 1px solid transparent;
  border-radius: 8px;
  background: var(--color-surface);
  font-size: 0.95rem;
  transition: filter 0.15s ease;
}

.btn:hover {
  filter: brightness(0.97);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-primary-text);
}

.btn-secondary {
  background: var(--color-surface);
  border-color: var(--color-border);
}

.btn-danger {
  background: var(--color-danger);
  color: #fff;
}

.screen {
  min-height: 100%;
}

.screen[hidden] {
  display: none !important;
}

/* App screen layout: header bar, sidebar + map below it */
#app-screen {
  display: grid;
  grid-template-rows: var(--header-height) 1fr;
  grid-template-columns: 1fr;
  height: 100vh;
}

#app-header {
  grid-row: 1;
  grid-column: 1 / -1;
}

#sidebar {
  grid-row: 2;
  grid-column: 1;
  overflow-y: auto;
  border-right: 1px solid var(--color-border);
  background: var(--color-surface);
}

#map-container {
  grid-row: 2;
  grid-column: 1;
  position: relative;
  min-height: 0;
}

/* Mobile / narrow viewports: single pane, toggled via data-view */
#app-screen[data-view="list"] #map-container,
#app-screen[data-view="map"] #sidebar {
  display: none;
}

@media (min-width: 768px) {
  #app-screen {
    grid-template-columns: var(--sidebar-width) 1fr;
  }

  #sidebar,
  #map-container {
    grid-column: auto;
  }

  /* On wide viewports both panes are always visible */
  #app-screen[data-view="list"] #map-container,
  #app-screen[data-view="map"] #sidebar {
    display: block;
  }

  #view-toggle {
    display: none;
  }
}