:root {
  /* UBAS barevná paleta */
  --color-ubas-red: #9e1a17;
  --color-ubas-orange: #fe7906;
  --color-bg-dark: #111518;
  --color-panel-dark: #1a2026;
  --color-panel-surface: #242c35;
  --color-border: #3f4245;
  --color-border-light: rgba(255, 255, 255, 0.15);
  --color-text-light: #eaeaec;
  --color-text-white: #ffffff;
  --color-text-pale: #f4f4f5;
  --color-text-muted: #8b97a5;

  /* Doplňkové / stavové barvy */
  --color-yellow: #f1dc37;
  --color-green: #1ba37f;
  --color-blue: #0a2c41;
  --color-accent-blue: #388bfd;
  --color-danger: #f0596b;

  /* Typografie a tvary */
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 9999px;
  --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.65);
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

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

body {
  background-color: var(--color-bg-dark);
  color: var(--color-text-pale);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

body.viewer-open {
  overflow: hidden;
  touch-action: none;
  -webkit-touch-callout: none;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--color-bg-dark);
}
::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-ubas-orange);
}

/* Hlavní lišta / Topbar */
.app-topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(17, 21, 24, 0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.topbar-inner {
  max-width: 1540px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.topbar-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
}

/* Odkaz v hlavičce (Družicové snímky) */
.brand-link {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  transition: opacity var(--transition-fast);
}

.brand-link:hover .brand-title {
  color: var(--color-ubas-orange);
}

.brand-title {
  font-size: 21px;
  font-weight: 750;
  color: var(--color-text-white);
  letter-spacing: 0.2px;
  line-height: 1.2;
  transition: color var(--transition-fast);
}

.brand-subtitle {
  font-size: 12px;
  color: var(--color-text-muted);
  font-weight: 400;
  margin-top: 1px;
}

/* Pravá část hlavičky (přepínač módů + mobilní filtr tlačítko) */
.topbar-controls-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Přepínač módů: Polární / Geostacionární */
.mode-switch {
  display: inline-flex;
  background-color: var(--color-panel-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: 3px;
  gap: 4px;
}

.mode-btn {
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 7px;
}

.mode-btn:hover {
  color: var(--color-text-white);
}

.mode-btn.active {
  background-color: var(--color-ubas-red);
  color: var(--color-text-white);
  box-shadow: 0 2px 8px rgba(158, 26, 23, 0.5);
}

/* Plovoucí tlačítko filtrů pro mobilní zařízení (FAB) */
.mobile-filter-fab {
  display: none;
}

.filter-active-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--color-ubas-orange);
}

/* Ikony v elementech */
.mode-icon-svg,
.btn-icon-svg,
.filter-toggle-icon,
.filter-search-icon,
.geo-icon-svg {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

/* Filtrační panel */
.filter-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.filter-input-wrap {
  position: relative;
  flex: 1 1 50px;
  display: flex;
  align-items: center;
}

.filter-search-icon {
  position: absolute;
  left: 11px;
  color: var(--color-text-muted);
  pointer-events: none;
}

.filter-input {
  width: 100%;
  background-color: var(--color-panel-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-white);
  font-family: inherit;
  font-size: 13px;
  padding: 8px 12px 8px 34px;
  transition: border-color var(--transition-fast);
}

.filter-input:focus {
  outline: none;
  border-color: var(--color-ubas-orange);
  box-shadow: 0 0 0 2px rgba(254, 121, 6, 0.2);
}

.filter-select {
  background-color: var(--color-panel-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-white);
  font-family: inherit;
  font-size: 13px;
  padding: 8px 12px;
  cursor: pointer;
}

.filter-select:focus {
  outline: none;
  border-color: var(--color-ubas-orange);
}

.filter-btn-reload {
  background-color: var(--color-panel-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-light);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  padding: 8px 14px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
}

.filter-btn-reload:hover {
  border-color: var(--color-ubas-orange);
  color: var(--color-text-white);
}

.summary-stats {
  font-size: 12px;
  color: var(--color-text-muted);
  margin-left: auto;
  white-space: nowrap;
}

.summary-stats b {
  color: var(--color-ubas-orange);
}

/* Responzivní filtry na mobilních zařízeních */
/* Responzivní filtry na mobilních zařízeních */
@media (max-width: 820px) {
  .topbar-inner {
    padding: 10px 14px;
    gap: 8px;
  }

  .topbar-header-row {
    gap: 8px;
  }

  .mode-btn {
    padding: 5px 12px;
    font-size: 12.5px;
    gap: 6px;
  }

  /* Plovoucí tlačítko filtrů (FAB v pravém dolním rohu) */
  .mobile-filter-fab {
    display: inline-flex;
    position: fixed;
    bottom: 22px;
    right: 18px;
    z-index: 95;
    background: linear-gradient(135deg, rgba(30, 36, 44, 0.96), rgba(17, 21, 24, 0.96));
    border: 1px solid var(--color-ubas-orange);
    color: var(--color-text-white);
    border-radius: var(--radius-full);
    padding: 10px 18px;
    font-family: inherit;
    font-size: 13.5px;
    font-weight: 600;
    cursor: pointer;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 18px rgba(0, 0, 0, 0.6), 0 0 12px rgba(254, 121, 6, 0.35);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all var(--transition-fast);
  }

  .mobile-filter-fab:hover {
    box-shadow: 0 6px 22px rgba(0, 0, 0, 0.7), 0 0 16px rgba(254, 121, 6, 0.5);
    border-color: #ff9033;
  }

  .mobile-filter-fab:active {
    transform: scale(0.95);
  }

  .mobile-filter-fab.active {
    background: linear-gradient(135deg, var(--color-ubas-orange), #d96200);
    border-color: var(--color-ubas-orange);
    color: #ffffff;
    box-shadow: 0 4px 20px rgba(254, 121, 6, 0.6);
  }

  .mobile-filter-fab.active .filter-active-dot {
    background-color: #ffffff;
  }

  /* Kompaktní rozbalení filtrů bez zbytečného prázdného místa */
  .filter-row {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    padding-top: 8px;
    margin-top: 0;
    border-top: 1px solid var(--color-border);
    animation: fadeInDown 0.2s ease;
  }

  .filter-row.mobile-open {
    display: flex;
  }

  .filter-input-wrap {
    margin: 0;
  }

  .filter-input {
    padding: 7px 12px 7px 32px;
    font-size: 13px;
  }

  .filter-select {
    padding: 7px 12px;
    font-size: 13px;
  }

  .filter-btn-reload {
    padding: 7px 14px;
    font-size: 13px;
    justify-content: center;
  }

  .filter-input-wrap,
  .filter-select,
  .filter-btn-reload {
    width: 100%;
  }

  .summary-stats {
    margin-left: 0;
    text-align: center;
    padding-top: 2px;
  }

  .brand-title {
    font-size: 18px;
  }

  .brand-subtitle {
    font-size: 11px;
  }
}

@media (max-width: 480px) {
  .mode-btn {
    padding: 5px 9px;
    font-size: 11.5px;
    gap: 5px;
  }
  .brand-title {
    font-size: 17px;
  }
}

/* Hlavní obsahová část */
.app-main {
  flex: 1;
  max-width: 1540px;
  width: 100%;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

/* Stavové zprávy */
.status-card {
  background-color: var(--color-panel-dark);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px 24px;
  text-align: center;
  color: var(--color-text-muted);
  margin: 30px auto;
  max-width: 560px;
}

.status-card h3 {
  color: var(--color-text-white);
  font-size: 18px;
  margin-bottom: 8px;
}

.status-spinner {
  display: inline-block;
  width: 32px;
  height: 32px;
  border: 3px solid rgba(254, 121, 6, 0.2);
  border-radius: 50%;
  border-top-color: var(--color-ubas-orange);
  animation: spin 0.8s linear infinite;
  margin-bottom: 16px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Geostacionární mód - Coming soon */
.geo-coming-soon {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 90px 20px;
  color: var(--color-text-muted);
}

.geo-icon-svg svg {
  width: 56px;
  height: 56px;
  color: var(--color-ubas-orange);
  margin-bottom: 16px;
}

.geo-title {
  font-size: 22px;
  font-weight: 600;
  color: var(--color-text-white);
  margin-bottom: 8px;
}

/* Patička */
.app-footer {
  border-top: 1px solid var(--color-border);
  padding: 22px 20px;
  text-align: center;
  font-size: 12.5px;
  color: var(--color-text-muted);
  background-color: var(--color-bg-dark);
}

.app-footer a {
  color: var(--color-ubas-orange);
  text-decoration: none;
  font-weight: 500;
}

.app-footer a:hover {
  text-decoration: underline;
  color: var(--color-text-white);
}