/* ==========================================================================
   Open Earth - Core Stylesheet & Design Token System
   A dark, high-contrast, scientific visual identity for Earth exploration.
   ========================================================================== */

:root {
  color-scheme: dark;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, 'SFMono-Regular', Menlo, Monaco, Consolas, monospace;

  /* Surfaces & Backgrounds */
  --bg-canvas: #060e16;
  --bg-panel: rgba(8, 18, 27, 0.94);
  --bg-panel-elevated: rgba(12, 26, 38, 0.96);
  --bg-card: rgba(13, 27, 39, 0.75);
  --bg-card-hover: rgba(20, 42, 60, 0.9);
  --bg-input: #0a1823;
  --bg-hover: rgba(99, 215, 230, 0.08);

  /* Borders */
  --border-subtle: rgba(116, 213, 225, 0.15);
  --border-panel: rgba(116, 213, 225, 0.28);
  --border-card: rgba(116, 213, 225, 0.22);
  --border-focus: #63d7e6;

  /* Typography Colors */
  --text-main: #d8edf3;
  --text-bright: #ffffff;
  --text-muted: #8caab3;
  --text-dim: #607e87;
  --text-link: #63d7e6;
  --text-link-hover: #9ef0fb;

  /* Semantic Layers */
  --color-volcano: #ff625e;
  --color-activity: #ff9b45;
  --color-quake: #ffe06b;
  --color-plate: #58d7e7;
  --color-fault: #d58cff;
  --color-trench: #7dd9e8;
  --color-cyan: #63d7e6;

  /* Severity / Alert Colors */
  --color-normal: #87e8de;
  --color-advisory: #ffe58f;
  --color-watch: #ffaa5e;
  --color-warning: #ff7875;

  /* Border Radii */
  --radius-sm: 5px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-panel: 0 14px 44px rgba(0, 0, 0, 0.45);
  --shadow-drawer: -18px 0 50px rgba(0, 0, 0, 0.4);
  --shadow-overlay: 0 20px 60px rgba(0, 0, 0, 0.7);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.2, 0.8, 0.25, 1);
}

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

html, body, #app, #map {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
}

body {
  overflow: hidden;
  background: var(--bg-canvas);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Accessible focus ring */
:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

/* ==========================================================================
   Common Panel Styling
   ========================================================================== */

.panel {
  position: absolute;
  z-index: 10;
  background: var(--bg-panel);
  border: 1px solid var(--border-panel);
  box-shadow: var(--shadow-panel);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-radius: var(--radius-lg);
}

/* ==========================================================================
   Brand Header
   ========================================================================== */

.brand {
  left: 18px;
  top: 18px;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  letter-spacing: 0.08em;
}

.brand .mark {
  font-size: 32px;
  line-height: 1;
  color: var(--color-cyan);
  filter: drop-shadow(0 0 8px rgba(99, 215, 230, 0.4));
}

.brand strong {
  display: block;
  font-size: 16px;
  font-weight: 750;
  letter-spacing: 0.12em;
  color: var(--text-bright);
}

.brand span {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-top: 2px;
}

/* ==========================================================================
   Sidebar Map Controls
   ========================================================================== */

.controls {
  left: 18px;
  top: 96px;
  width: 360px;
  padding: 16px 18px;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-card) transparent;
}

.controls::-webkit-scrollbar {
  width: 6px;
}
.controls::-webkit-scrollbar-thumb {
  background: var(--border-card);
  border-radius: 3px;
}

/* Search Bar */
.search {
  height: 44px;
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 0 12px;
  background: var(--bg-input);
  transition: border-color var(--transition-fast);
}

.search:focus-within {
  border-color: var(--border-focus);
}

.search span {
  font-size: 16px;
  color: var(--text-muted);
}

.search input {
  flex: 1;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text-bright);
  font-size: 13.5px;
  font-family: inherit;
}

.search input::placeholder {
  color: var(--text-dim);
}

.search-results {
  margin-top: 6px;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-panel-elevated);
}

.search-hit-btn {
  display: block;
  width: 100%;
  min-height: 40px;
  padding: 9px 12px;
  text-align: left;
  border: 0;
  border-bottom: 1px solid var(--border-subtle);
  background: transparent;
  color: var(--text-main);
  cursor: pointer;
  font-size: 13px;
  transition: background var(--transition-fast);
}

.search-hit-btn:last-child {
  border-bottom: 0;
}

.search-hit-btn:hover {
  background: var(--bg-hover);
  color: var(--text-bright);
}

.search-empty {
  padding: 12px;
  font-size: 12px;
  color: var(--text-dim);
  text-align: center;
}

/* Section Titles */
.control-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 18px 0 8px;
}

/* Checkbox Labels */
.controls > label:not(.search) {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 34px;
  padding: 4px 2px;
  font-size: 13.5px;
  cursor: pointer;
  user-select: none;
  transition: color var(--transition-fast);
}

.controls > label:not(.search):hover {
  color: var(--text-bright);
}

.controls input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--color-cyan);
  cursor: pointer;
}

.controls label b {
  margin-left: auto;
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
}

/* Shape Icons in Legend */
.dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  display: inline-block;
  flex: none;
}
.dot.quake { background: var(--color-quake); }
.dot.plate { background: var(--color-plate); }

.line {
  width: 12px;
  height: 2px;
  display: inline-block;
  flex: none;
}
.line.bathymetry {
  background: var(--color-trench);
  border-top: 1px dashed var(--color-trench);
}
.line.fault {
  background: var(--color-fault);
  transform: rotate(-35deg);
}

.feature-legend {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 10px;
  margin: 10px 0 4px;
  padding: 8px 10px;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  background: rgba(8, 20, 29, 0.4);
}

.feature-legend span {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--text-muted);
}

.legend-shape {
  display: inline-block;
  flex: 0 0 auto;
}

.legend-shape.triangle {
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-bottom: 9px solid var(--color-volcano);
}

.legend-shape.activity-shape {
  border-bottom-color: var(--color-activity);
}

.legend-shape.circle {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-quake);
}

.legend-shape.line-shape {
  width: 14px;
  height: 2.5px;
  background: var(--color-plate);
}

.legend-shape.slash {
  width: 14px;
  height: 2.5px;
  background: var(--color-fault);
  transform: rotate(-25deg);
}

.tectonic-legend {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 10px;
  margin: 6px 0;
  padding: 8px 10px;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  background: rgba(8, 20, 29, 0.4);
}

.tectonic-legend span {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 10.5px;
  color: var(--text-muted);
}

.tectonic-key {
  width: 14px;
  height: 3px;
  display: inline-block;
  border-radius: 1px;
}
.tectonic-key.subduction { background: #ff8b62; }
.tectonic-key.divergent { background: #58d7e7; }
.tectonic-key.transform { background: #d58cff; }
.tectonic-key.convergent { background: #ffbd66; }

/* Segmented Range Buttons */
.segmented {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  margin-top: 4px;
}

.segmented button {
  min-height: 34px;
  border: 1px solid var(--border-card);
  background: var(--bg-input);
  color: var(--text-muted);
  padding: 6px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 12.5px;
  font-weight: 550;
  transition: all var(--transition-fast);
}

.segmented button:hover {
  color: var(--text-bright);
  background: var(--bg-hover);
}

.segmented button.active {
  background: #143542;
  color: var(--text-bright);
  border-color: var(--border-focus);
}

/* Historical Search Accordion */
.history-search {
  margin-top: 10px;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 8px 12px;
  background: rgba(8, 20, 29, 0.4);
}

.history-search summary {
  cursor: pointer;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  user-select: none;
}

.history-search summary:hover {
  color: var(--text-bright);
}

.history-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 10px;
}

.history-grid label {
  font-size: 11px;
  color: var(--text-dim);
}

.history-grid input {
  display: block;
  width: 100%;
  margin-top: 3px;
  height: 32px;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  color: var(--text-main);
  padding: 0 6px;
  font-size: 12px;
  font-family: inherit;
}

.history-around {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  font-size: 12px;
  color: var(--text-muted);
  cursor: pointer;
}

.history-actions {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

.history-actions button {
  flex: 1;
  padding: 7px 10px;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  background: #122836;
  color: var(--text-main);
  font-size: 11.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.history-actions button:hover {
  border-color: var(--border-focus);
  color: var(--text-bright);
}

/* View Grid (Projection & Basemap) */
.view-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.view-grid label {
  font-size: 11px;
  color: var(--text-dim);
}

.view-grid select {
  display: block;
  width: 100%;
  margin-top: 4px;
  height: 34px;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  color: var(--text-main);
  padding: 0 8px;
  font-size: 12.5px;
  font-family: inherit;
  cursor: pointer;
}

.note {
  margin-top: 8px;
  font-size: 11.5px;
  line-height: 1.45;
  color: var(--text-dim);
}

.reset-view {
  margin-top: 10px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--text-dim);
  font-size: 11.5px;
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.reset-view:hover {
  color: var(--text-link);
}

.status {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--border-subtle);
  font-size: 11.5px;
  line-height: 1.5;
  color: var(--text-muted);
}

/* Sidebar Footer Links */
.controls-footer {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  font-size: 11.5px;
  color: var(--text-dim);
}

.controls-footer a,
.controls-footer button {
  background: transparent;
  border: 0;
  padding: 0;
  color: var(--text-muted);
  font-size: 11.5px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: color var(--transition-fast);
}

.controls-footer a:hover,
.controls-footer button:hover {
  color: var(--text-link);
}

.controls-footer .github-link svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

/* ==========================================================================
   Loading Indicator
   ========================================================================== */

.map-loading {
  position: absolute;
  z-index: 50;
  left: 50%;
  top: 20px;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 16px;
  border: 1px solid var(--border-panel);
  border-radius: var(--radius-full);
  background: var(--bg-panel-elevated);
  box-shadow: var(--shadow-panel);
  color: var(--text-bright);
  font-size: 12.5px;
  pointer-events: none;
}

.map-loading[hidden] {
  display: none !important;
}

.map-loading span {
  width: 12px;
  height: 12px;
  border: 2px solid rgba(99, 215, 230, 0.25);
  border-top-color: var(--color-cyan);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

/* ==========================================================================
   Modals (About, Impressum, Privacy)
   ========================================================================== */

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(3, 10, 15, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.modal-overlay.visible {
  opacity: 1;
  pointer-events: auto;
}

.modal-overlay[hidden] {
  display: none !important;
}

.modal-dialog {
  position: relative;
  width: min(640px, 94vw);
  max-height: 85vh;
  overflow-y: auto;
  background: var(--bg-panel-elevated);
  border: 1px solid var(--border-panel);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-overlay);
  padding: 28px 32px;
}

.modal-close-btn {
  position: absolute;
  top: 16px;
  right: 18px;
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-muted);
  font-size: 22px;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: all var(--transition-fast);
}

.modal-close-btn:hover {
  background: var(--bg-hover);
  color: var(--text-bright);
}

.modal-header-title {
  margin: 0;
  font-size: 22px;
  font-weight: 750;
  color: var(--text-bright);
}

.modal-tagline {
  margin: 6px 0 16px;
  font-size: 13.5px;
  color: var(--text-muted);
}

.modal-principle-box {
  padding: 12px 16px;
  border: 1px solid var(--border-card);
  border-left: 3px solid var(--color-cyan);
  border-radius: var(--radius-sm);
  background: rgba(10, 25, 36, 0.6);
  margin-bottom: 20px;
}

.modal-principle-box strong {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-cyan);
  margin-bottom: 4px;
}

.modal-principle-box p {
  margin: 0;
  font-size: 13px;
  color: var(--text-main);
  font-style: italic;
}

.modal-section {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
}

.modal-section:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.modal-section h3 {
  margin: 0 0 8px;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-bright);
}

.modal-section p {
  margin: 0 0 10px;
  font-size: 13px;
  color: var(--text-main);
  line-height: 1.6;
}

.modal-section ul {
  margin: 6px 0 10px 20px;
  padding: 0;
  font-size: 13px;
  color: var(--text-main);
  line-height: 1.6;
}

.modal-link-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.modal-action-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text-main);
  text-decoration: none;
  font-size: 12.5px;
  font-weight: 550;
  transition: all var(--transition-fast);
}

.modal-action-link:hover {
  border-color: var(--border-focus);
  color: var(--text-bright);
  background: var(--bg-card-hover);
}

.legal-placeholder-card {
  padding: 12px 14px;
  border: 1px dashed rgba(255, 155, 69, 0.4);
  border-radius: var(--radius-sm);
  background: rgba(255, 155, 69, 0.06);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-bright);
  line-height: 1.7;
  margin: 10px 0;
}

.privacy-endpoint-list {
  margin: 8px 0 12px 20px;
  padding: 0;
  font-size: 12.5px;
  color: var(--text-main);
  line-height: 1.65;
}

.privacy-endpoint-list code {
  font-family: var(--font-mono);
  background: rgba(0, 0, 0, 0.3);
  padding: 2px 5px;
  border-radius: 3px;
  color: var(--color-cyan);
  font-size: 11.5px;
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */

@media (max-width: 900px) {
  .controls {
    width: calc(100vw - 36px);
    max-height: 48vh;
    top: auto;
    bottom: 18px;
  }
  .brand {
    top: 12px;
    left: 12px;
    padding: 8px 14px;
  }
}

@media (max-width: 600px) {
  .controls {
    left: 8px;
    right: 8px;
    bottom: 8px;
    width: calc(100% - 16px);
  }
  .brand {
    top: 8px;
    left: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}