/* ===== DESIGN TOKENS ===== */
:root {
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);

  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem;
  --space-4: 1rem; --space-5: 1.25rem; --space-6: 1.5rem;
  --space-8: 2rem; --space-10: 2.5rem;

  --radius-sm: 0.375rem; --radius-md: 0.5rem;
  --radius-lg: 0.75rem; --radius-full: 9999px;
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Activity colors */
  --color-walking:   #2d7a3a;
  --color-hiking:    #8b5e3c;
  --color-cycling:   #1e6091;
  --color-kayaking:  #0891b2;
  --color-car:       #6b7280;
  --color-flight:    #dc2626;
  --color-unknown:   #9333ea;
}

/* ===== LIGHT ===== */
:root, [data-theme="light"] {
  --color-bg: #f5f3ef; --color-surface: #faf9f6;
  --color-surface-2: #ffffff; --color-surface-offset: #eceae4;
  --color-divider: #d8d4cc; --color-border: #ccc8bf;
  --color-text: #1e1d1a; --color-text-muted: #6b695f;
  --color-text-faint: #a5a29a; --color-text-inverse: #faf9f6;
  --color-primary: #2d7a3a; --color-primary-hover: #1f5c29;
  --color-primary-light: #e0f0e3;
  --shadow-sm: 0 1px 2px rgba(30,29,26,.06);
  --shadow-md: 0 4px 12px rgba(30,29,26,.08);
  --shadow-lg: 0 12px 32px rgba(30,29,26,.12);
}

/* ===== DARK ===== */
[data-theme="dark"] {
  --color-bg: #141310; --color-surface: #1a1916;
  --color-surface-2: #201f1b; --color-surface-offset: #1c1b17;
  --color-divider: #2a2924; --color-border: #3a382f;
  --color-text: #d4d2cc; --color-text-muted: #8a877e;
  --color-text-faint: #5e5c55; --color-text-inverse: #1a1916;
  --color-primary: #4aba5b; --color-primary-hover: #3da34d;
  --color-primary-light: #1e2e20;
  --color-walking: #4aba5b; --color-hiking: #c4956a;
  --color-cycling: #3b9cca; --color-kayaking: #22d3ee;
  --color-car: #9ca3af; --color-flight: #f87171; --color-unknown: #a855f7;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.2);
  --shadow-md: 0 4px 12px rgba(0,0,0,.3);
  --shadow-lg: 0 12px 32px rgba(0,0,0,.4);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #141310; --color-surface: #1a1916;
    --color-surface-2: #201f1b; --color-surface-offset: #1c1b17;
    --color-divider: #2a2924; --color-border: #3a382f;
    --color-text: #d4d2cc; --color-text-muted: #8a877e;
    --color-text-faint: #5e5c55; --color-text-inverse: #1a1916;
    --color-primary: #4aba5b; --color-primary-hover: #3da34d;
    --color-primary-light: #1e2e20;
    --color-walking: #4aba5b; --color-hiking: #c4956a;
    --color-cycling: #3b9cca; --color-kayaking: #22d3ee;
    --color-car: #9ca3af; --color-flight: #f87171; --color-unknown: #a855f7;
    --shadow-sm: 0 1px 2px rgba(0,0,0,.2);
    --shadow-md: 0 4px 12px rgba(0,0,0,.3);
    --shadow-lg: 0 12px 32px rgba(0,0,0,.4);
  }
}

/* ===== LAYOUT ===== */
#app { display: flex; flex-direction: column; height: 100dvh; overflow: hidden; }

/* ===== HEADER ===== */
.header {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-2) var(--space-4); background: var(--color-surface);
  border-bottom: 1px solid var(--color-divider); z-index: 10; gap: var(--space-4); flex-shrink: 0;
}
.header-left { display: flex; align-items: center; gap: var(--space-3); }
.header-left h1 { font-size: var(--text-lg); font-weight: 700; letter-spacing: -0.02em; }
.logo { color: var(--color-primary); flex-shrink: 0; }
.header-right { display: flex; align-items: center; gap: var(--space-4); }
.stats-bar { display: flex; gap: var(--space-4); }
.stat { display: flex; align-items: center; gap: var(--space-1); font-size: var(--text-xs); color: var(--color-text-muted); }
.stat-icon { width: 14px; height: 14px; color: var(--color-primary); }
.stat-value { font-family: var(--font-mono); font-weight: 600; color: var(--color-text); font-variant-numeric: tabular-nums; }
.stat-label { color: var(--color-text-faint); }

/* ===== BUTTONS ===== */
.btn-icon {
  display: flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: var(--radius-md);
  color: var(--color-text-muted); background: transparent;
}
.btn-icon:hover { background: var(--color-surface-offset); color: var(--color-text); }
.btn-icon i, .btn-icon svg { width: 18px; height: 18px; }

/* Update button */
.btn-update {
  display: flex; align-items: center; gap: var(--space-2);
  padding: var(--space-1) var(--space-3); border-radius: var(--radius-full);
  font-size: var(--text-xs); font-weight: 600; font-family: var(--font-body);
  color: var(--color-primary); border: 1.5px solid var(--color-primary);
  background: transparent; transition: all var(--transition-interactive);
}
.btn-update:hover { background: var(--color-primary); color: var(--color-text-inverse); }
.btn-update-icon { width: 14px; height: 14px; }
.btn-update.loading .btn-update-icon { animation: spin 1s linear infinite; }
.btn-update.done { border-color: var(--color-walking); color: var(--color-walking); pointer-events: none; }
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

/* Update toast */
.update-toast {
  position: fixed; top: var(--space-4); left: 50%; transform: translateX(-50%);
  background: var(--color-surface-2); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-3) var(--space-5);
  box-shadow: var(--shadow-lg); z-index: 100; font-size: var(--text-sm);
  color: var(--color-text); display: flex; align-items: center; gap: var(--space-2);
  opacity: 0; transition: opacity 300ms, transform 300ms;
  pointer-events: none;
}
.update-toast.visible { opacity: 1; pointer-events: auto; }
.btn-text {
  font-size: var(--text-xs); color: var(--color-text-muted);
  padding: var(--space-1) var(--space-2); border-radius: var(--radius-sm);
}
.btn-text:hover { background: var(--color-surface-offset); color: var(--color-text); }

/* ===== MAIN ===== */
.main { display: flex; flex: 1; min-height: 0; position: relative; }

/* ===== SIDEBAR ===== */
.sidebar {
  width: 340px; background: var(--color-surface);
  border-right: 1px solid var(--color-divider);
  display: flex; flex-direction: column; flex-shrink: 0;
  transition: margin-left 300ms cubic-bezier(0.16, 1, 0.3, 1), opacity 300ms;
  z-index: 5;
}
.sidebar.collapsed { margin-left: -340px; opacity: 0; pointer-events: none; }
.sidebar-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-3) var(--space-4); border-bottom: 1px solid var(--color-divider);
}
.sidebar-header h2 {
  font-size: var(--text-sm); font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.06em; color: var(--color-text-muted);
}
.sidebar-subheader {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-2) var(--space-4); border-bottom: 1px solid var(--color-divider);
  font-size: var(--text-xs); color: var(--color-text-muted);
}

/* ===== FILTERS ===== */
.filters { padding: var(--space-3) var(--space-4); border-bottom: 1px solid var(--color-divider); }
.filter-group { margin-bottom: var(--space-2); }
.filter-group:last-child { margin-bottom: 0; }
.filter-label { font-size: var(--text-xs); font-weight: 600; color: var(--color-text-muted); margin-bottom: var(--space-1); display: block; }
.filter-chips { display: flex; flex-wrap: wrap; gap: var(--space-1); }
.chip {
  font-size: 12px; padding: 3px 10px; border-radius: var(--radius-full);
  border: 1px solid var(--color-border); color: var(--color-text-muted);
  cursor: pointer; transition: all var(--transition-interactive);
  font-family: var(--font-body); white-space: nowrap;
}
.chip:hover { border-color: var(--color-text-muted); }
.chip.active { background: var(--color-primary); color: var(--color-text-inverse); border-color: var(--color-primary); }
.chip .chip-count { opacity: 0.7; margin-left: 2px; }

/* ===== TRACK LIST ===== */
.track-list { flex: 1; overflow-y: auto; padding: var(--space-1); }
.track-card {
  padding: var(--space-2) var(--space-3); border-radius: var(--radius-md);
  cursor: pointer; transition: background var(--transition-interactive); margin-bottom: 1px;
}
.track-card:hover { background: var(--color-surface-offset); }
.track-card.active { background: var(--color-primary-light); }
.track-card-header { display: flex; align-items: center; gap: var(--space-2); }
.track-color-dot { width: 8px; height: 8px; border-radius: var(--radius-full); flex-shrink: 0; }
.track-card-name { font-size: var(--text-xs); font-weight: 600; color: var(--color-text); flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.track-card-meta {
  display: flex; gap: var(--space-3); font-size: 11px; color: var(--color-text-faint);
  padding-left: calc(8px + var(--space-2)); font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}
.btn-load-more {
  width: 100%; padding: var(--space-3); margin-top: var(--space-2);
  background: transparent; border: 1px dashed var(--color-divider);
  border-radius: var(--radius-md); color: var(--color-text-muted);
  font-size: var(--text-xs); cursor: pointer; transition: all 0.15s;
}
.btn-load-more:hover { background: var(--color-surface-offset); color: var(--color-text); }

/* ===== MAP ===== */
.map-container { flex: 1; position: relative; min-width: 0; }
#map { width: 100%; height: 100%; }
.map-controls {
  position: absolute; top: var(--space-3); left: var(--space-3);
  display: flex; flex-direction: column; gap: var(--space-2); z-index: 3;
}
.map-controls .btn-icon {
  background: var(--color-surface); box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}
.map-controls .btn-icon:hover { background: var(--color-surface-2); }
.sidebar-open { display: none; }
.sidebar.collapsed ~ .map-container .sidebar-open { display: flex; }

/* ===== LEGEND ===== */
.legend {
  position: absolute; bottom: var(--space-3); right: var(--space-3);
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: var(--space-2) var(--space-3);
  box-shadow: var(--shadow-md); z-index: 3; font-size: 11px;
  display: flex; gap: var(--space-3); align-items: center;
}
.legend-item { display: flex; align-items: center; gap: 4px; color: var(--color-text-muted); }
.legend-dot { width: 10px; height: 3px; border-radius: 2px; }

/* ===== ELEVATION PANEL ===== */
.elevation-panel {
  position: absolute; bottom: var(--space-10); left: var(--space-4); right: var(--space-4);
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-lg);
  padding: var(--space-3) var(--space-4); z-index: 4; display: none; max-height: 200px;
}
.elevation-panel.visible { display: block; }
.elevation-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: var(--space-2); }
.elevation-header h3 { font-size: var(--text-sm); font-weight: 600; }
#elevation-canvas { width: 100%; height: 120px; }

/* ===== POPUPS ===== */
.maplibregl-popup-content {
  background: var(--color-surface) !important; color: var(--color-text) !important;
  border: 1px solid var(--color-border) !important; border-radius: var(--radius-lg) !important;
  box-shadow: var(--shadow-lg) !important; padding: var(--space-3) var(--space-4) !important;
  font-family: var(--font-body) !important; max-width: 280px !important;
}
.maplibregl-popup-tip { border-top-color: var(--color-surface) !important; }
[data-theme="dark"] .maplibregl-popup-content { background: var(--color-surface-2) !important; border-color: var(--color-border) !important; }
[data-theme="dark"] .maplibregl-popup-tip { border-top-color: var(--color-surface-2) !important; }
.maplibregl-popup-close-button { color: var(--color-text-muted) !important; font-size: 18px !important; padding: 4px 8px !important; }
.popup-title { font-size: var(--text-sm); font-weight: 600; margin-bottom: var(--space-1); }
.popup-activity { font-size: var(--text-xs); color: var(--color-text-muted); margin-bottom: var(--space-2); display: flex; align-items: center; gap: var(--space-1); }
.popup-activity-dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.popup-stats { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-1) var(--space-3); font-size: var(--text-xs); }
.popup-stats dt { font-weight: 500; color: var(--color-text-faint); }
.popup-stats dd { font-family: var(--font-mono); font-variant-numeric: tabular-nums; color: var(--color-text); }

/* ===== POPUP ACTIVITY EDITOR ===== */
.popup-edit-row {
  display: flex; align-items: center; gap: var(--space-2); margin-top: var(--space-2);
  padding-top: var(--space-2); border-top: 1px solid var(--color-divider);
}
.popup-edit-row label { font-size: var(--text-xs); color: var(--color-text-faint); white-space: nowrap; }
.popup-edit-select {
  flex: 1; font-size: var(--text-xs); font-family: var(--font-body);
  padding: 3px 6px; border-radius: var(--radius-sm);
  border: 1px solid var(--color-border); background: var(--color-surface-offset);
  color: var(--color-text); cursor: pointer;
}
.popup-edit-select:focus { outline: 2px solid var(--color-primary); outline-offset: 1px; }
.popup-edited-badge {
  display: inline-block; font-size: 10px; padding: 1px 5px;
  border-radius: var(--radius-full); background: var(--color-primary-light);
  color: var(--color-primary); font-weight: 600; margin-left: var(--space-1);
}
.popup-delete-row {
  margin-top: var(--space-2); padding-top: var(--space-2);
  border-top: 1px solid var(--color-divider);
}
.btn-delete-track {
  display: flex; align-items: center; gap: 5px; width: 100%;
  padding: 5px 10px; border-radius: var(--radius-sm); border: 1px solid #fca5a5;
  background: #fff5f5; color: #dc2626; font-size: var(--text-xs);
  font-family: var(--font-body); cursor: pointer; transition: all 0.15s;
  justify-content: center; font-weight: 500;
}
.btn-delete-track:hover { background: #dc2626; color: #fff; border-color: #dc2626; }
[data-theme="dark"] .btn-delete-track { background: #2d1515; border-color: #7f1d1d; color: #f87171; }
[data-theme="dark"] .btn-delete-track:hover { background: #dc2626; color: #fff; border-color: #dc2626; }

/* ===== EXPORT BUTTON ===== */
.sidebar-footer {
  padding: var(--space-2) var(--space-4); border-top: 1px solid var(--color-divider);
  display: none; flex-shrink: 0;
}
.sidebar-footer.has-edits { display: block; }
.btn-export {
  display: flex; align-items: center; justify-content: center; gap: var(--space-2);
  width: 100%; padding: var(--space-2); border-radius: var(--radius-md);
  font-size: var(--text-xs); font-weight: 600; font-family: var(--font-body);
  color: var(--color-primary); border: 1.5px solid var(--color-primary);
  background: transparent; transition: all var(--transition-interactive);
}
.btn-export:hover { background: var(--color-primary); color: var(--color-text-inverse); }
.btn-export i { width: 14px; height: 14px; }
.edits-badge {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 18px; height: 18px; border-radius: var(--radius-full);
  background: var(--color-primary); color: var(--color-text-inverse);
  font-size: 10px; font-weight: 700; padding: 0 4px;
}

/* ===== FOOTER ===== */
.footer {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-1) var(--space-4); font-size: var(--text-xs);
  color: var(--color-text-faint); background: var(--color-surface);
  border-top: 1px solid var(--color-divider); flex-shrink: 0;
}
.footer a { color: var(--color-text-faint); text-decoration: none; }
.footer a:hover { color: var(--color-text-muted); text-decoration: underline; }

/* ===== SCROLLBAR ===== */
.track-list::-webkit-scrollbar { width: 5px; }
.track-list::-webkit-scrollbar-track { background: transparent; }
.track-list::-webkit-scrollbar-thumb { background: var(--color-divider); border-radius: var(--radius-full); }

/* ===== MOBILE ===== */
@media (max-width: 768px) {
  .stats-bar { display: none; }
  .btn-update span { display: none; }
  .btn-update { padding: var(--space-1); width: 36px; height: 36px; justify-content: center; border-radius: var(--radius-md); }
  .sidebar { position: absolute; top: 0; left: 0; bottom: 0; width: 300px; z-index: 20; box-shadow: var(--shadow-lg); }
  .sidebar.collapsed { margin-left: -300px; }
  .sidebar-open { display: flex !important; }
  .elevation-panel { left: var(--space-2); right: var(--space-2); bottom: var(--space-8); }
  .legend { bottom: var(--space-2); right: var(--space-2); font-size: 10px; padding: var(--space-1) var(--space-2); }
}