/* ========== Reset & base ========== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #0a0e17;
  --panel-bg: rgba(12, 18, 32, 0.85);
  --panel-border: rgba(60, 120, 220, 0.25);
  --text: #c8d6e5;
  --text-dim: #6c7a8d;
  --accent: #4dabf7;
  --green: #2ed573;
  --yellow: #ffa502;
  --red: #ff4757;
  --radius: 10px;
}

body {
  font-family: 'SF Mono', 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
  height: 100vh;
  width: 100vw;
}

canvas#globe {
  display: block;
  width: 100vw;
  height: 100vh;
  position: fixed;
  top: 0; left: 0;
  z-index: 0;
  touch-action: none;
}

/* ========== Loading screen ========== */
#loader {
  position: fixed; inset: 0;
  z-index: 1000;
  background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  transition: opacity 0.6s ease;
}
#loader.fade-out { opacity: 0; pointer-events: none; }
.loader-content { text-align: center; }
.loader-content h2 { font-size: 1.5rem; margin: 1rem 0 0.5rem; color: var(--accent); font-weight: 400; }
.loader-content p { font-size: 0.85rem; color: var(--text-dim); }

.spinner {
  width: 48px; height: 48px;
  border: 2px solid var(--panel-border);
  border-top-color: var(--accent);
  border-radius: 50%;
  margin: 0 auto;
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ========== Panels (glass) ========== */
.panel {
  position: fixed;
  z-index: 10;
  background: var(--panel-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 16px;
  font-size: 0.8rem;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}
.panel::-webkit-scrollbar { width: 4px; }
.panel::-webkit-scrollbar-thumb { background: var(--panel-border); border-radius: 4px; }
.panel h3 { font-size: 0.85rem; color: var(--accent); font-weight: 500; margin-bottom: 10px; text-transform: uppercase; letter-spacing: 0.08em; }
.panel h4 { font-size: 0.82rem; color: var(--accent); font-weight: 500; margin: 12px 0 8px; }
.panel hr { border: none; border-top: 1px solid var(--panel-border); margin: 10px 0; }
.hidden { display: none !important; }

/* ========== Top bar ========== */
#topbar {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 20;
  height: 52px;
  display: flex; align-items: center; gap: 12px;
  padding: 0 16px;
  background: rgba(10, 14, 23, 0.75);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--panel-border);
}
.brand {
  display: flex; align-items: center; gap: 8px;
  color: var(--accent); font-weight: 600; font-size: 0.95rem;
  white-space: nowrap;
}
.brand svg { flex-shrink: 0; }

.search-box { position: relative; flex: 1; max-width: 320px; }
.search-box input {
  width: 100%;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  padding: 6px 12px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.8rem;
  outline: none;
  transition: border-color 0.2s;
}
.search-box input:focus { border-color: var(--accent); }
.search-box input::placeholder { color: var(--text-dim); }

.search-dropdown {
  position: absolute; top: calc(100% + 4px); left: 0; right: 0;
  background: var(--panel-bg); backdrop-filter: blur(16px);
  border: 1px solid var(--panel-border); border-radius: 6px;
  max-height: 260px; overflow-y: auto;
  z-index: 100;
}
.search-dropdown .search-item {
  padding: 8px 12px; cursor: pointer;
  font-size: 0.78rem;
  display: flex; justify-content: space-between; align-items: center;
}
.search-dropdown .search-item:hover { background: rgba(77, 171, 247, 0.12); }
.search-dropdown .search-item .sat-name { color: var(--text); }
.search-dropdown .search-item .sat-id { color: var(--text-dim); font-size: 0.7rem; }

.top-controls select {
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  padding: 6px 10px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.78rem;
  cursor: pointer;
  outline: none;
}
.top-controls select option { background: var(--bg); }

/* Toolbar buttons */
.toolbar-buttons {
  display: flex; gap: 4px; margin-left: auto;
}
.toolbar-btn {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  color: var(--text-dim);
  padding: 6px 8px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.2s;
}
.toolbar-btn:hover { background: rgba(77, 171, 247, 0.15); color: var(--accent); border-color: var(--accent); }
.toolbar-btn.active { background: rgba(77, 171, 247, 0.2); color: var(--accent); border-color: var(--accent); }

/* ========== Stats panel ========== */
#stats-panel {
  top: 68px; left: 16px; width: 200px;
}
.stat-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 4px 0;
}
.stat-label { color: var(--text-dim); }
.stat-value { font-weight: 600; font-variant-numeric: tabular-nums; }

.legend-item { display: flex; align-items: center; gap: 6px; padding: 3px 0; cursor: pointer; font-size: 0.75rem; color: var(--text-dim); transition: opacity 0.2s; }
.legend-item:hover { color: #fff; }
.legend-item.hidden-cat { opacity: 0.3; text-decoration: line-through; }
.legend-count { margin-left: auto; font-variant-numeric: tabular-nums; font-size: 0.7rem; }
.legend-group-label { font-size: 0.6rem; color: var(--text-dim); opacity: 0.5; margin-top: 6px; text-transform: uppercase; letter-spacing: 0.1em; }
.dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }

/* ========== Info panel (tabbed) ========== */
#info-panel {
  top: 68px; right: 16px; width: 300px;
}
.panel-header {
  display: flex; justify-content: space-between; align-items: flex-start;
}
.panel-header h3 { font-size: 0.95rem; word-break: break-word; flex: 1; }
.panel-header button {
  background: none; border: none; color: var(--text-dim); font-size: 1.2rem;
  cursor: pointer; padding: 0 0 0 8px; line-height: 1;
}
.panel-header button:hover { color: var(--text); }

/* 3D Model preview */
#model-preview-container {
  width: 100%; height: 140px; margin: 8px 0;
  border-radius: 8px; overflow: hidden;
  background: rgba(0,0,0,0.4); border: 1px solid var(--panel-border);
}
#model-preview-canvas { width: 100%; height: 100%; display: block; }

/* Tabs */
.tab-bar {
  display: flex; gap: 2px; margin: 10px 0 12px;
  background: rgba(255,255,255,0.03);
  border-radius: 6px;
  padding: 2px;
}
.tab-btn {
  flex: 1;
  background: none; border: none;
  color: var(--text-dim);
  font-family: inherit;
  font-size: 0.7rem;
  padding: 5px 4px;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active { background: rgba(77, 171, 247, 0.2); color: var(--accent); }

.tab-content { display: none; }
.tab-content.active { display: block; }
.tab-loading { color: var(--text-dim); font-size: 0.75rem; padding: 10px 0; text-align: center; }

.info-grid { display: flex; flex-direction: column; gap: 2px; }
.info-item {
  display: flex; justify-content: space-between; padding: 4px 0;
}
.info-label { color: var(--text-dim); }
.info-value { color: var(--text); font-weight: 500; text-align: right; max-width: 60%; word-break: break-all; }

/* Radio transmitter cards */
.tx-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  padding: 8px 10px;
  margin-bottom: 6px;
}
.tx-card .tx-desc { color: var(--accent); font-size: 0.78rem; margin-bottom: 4px; }
.tx-card .tx-row { display: flex; justify-content: space-between; font-size: 0.72rem; padding: 1px 0; }
.tx-card .tx-label { color: var(--text-dim); }
.tx-card .tx-value { color: var(--text); }
.tx-alive { color: var(--green); }
.tx-dead { color: var(--red); }

/* Conjunction risk items */
.risk-item {
  background: rgba(255,70,70,0.05);
  border: 1px solid rgba(255,70,70,0.2);
  border-radius: 6px;
  padding: 8px 10px;
  margin-bottom: 6px;
  font-size: 0.72rem;
}
.risk-item .risk-label { color: var(--text-dim); }
.risk-item .risk-value { color: var(--text); }
.risk-item .risk-header { color: var(--red); font-weight: 600; margin-bottom: 4px; }

/* ========== Side panels (weather, conjunctions, ISS, launches) ========== */
.side-panel {
  top: 68px;
  left: 232px;
  width: 320px;
}

#weather-panel { z-index: 12; }
#conj-panel { z-index: 12; }
#iss-panel { z-index: 12; }
#launches-panel { z-index: 12; }

/* Weather panel specifics */
.weather-section {
  margin-bottom: 14px;
}
.weather-section h4 {
  font-size: 0.78rem;
  color: var(--accent);
  margin-bottom: 6px;
  font-weight: 500;
}

.kp-gauge {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 10px;
}
.kp-value {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  min-width: 60px;
  text-align: center;
}
.kp-bar {
  flex: 1; height: 8px;
  background: rgba(255,255,255,0.05);
  border-radius: 4px;
  overflow: hidden;
}
.kp-bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.5s;
}
.kp-label { font-size: 0.7rem; color: var(--text-dim); }

.scale-badges {
  display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 8px;
}
.scale-badge {
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 600;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--panel-border);
}
.scale-badge.level-0 { color: var(--green); border-color: rgba(46,213,115,0.3); }
.scale-badge.level-1, .scale-badge.level-2 { color: var(--yellow); border-color: rgba(255,165,2,0.3); }
.scale-badge.level-3, .scale-badge.level-4, .scale-badge.level-5 { color: var(--red); border-color: rgba(255,71,87,0.3); }

.weather-stat {
  display: flex; justify-content: space-between; padding: 3px 0;
}
.weather-stat .ws-label { color: var(--text-dim); font-size: 0.72rem; }
.weather-stat .ws-value { color: var(--text); font-size: 0.72rem; font-weight: 500; }

.sdo-thumb {
  border-radius: 6px;
  margin-top: 6px;
  width: 100%;
  max-width: 200px;
  display: block;
  border: 1px solid var(--panel-border);
}

.alert-item {
  background: rgba(255,165,2,0.06);
  border: 1px solid rgba(255,165,2,0.2);
  border-radius: 6px;
  padding: 6px 8px;
  margin-bottom: 4px;
  font-size: 0.7rem;
  color: var(--text-dim);
}
.alert-item .alert-type { color: var(--yellow); font-weight: 600; }

/* Conjunction list */
.conj-item {
  background: rgba(255,70,70,0.04);
  border: 1px solid rgba(255,70,70,0.15);
  border-radius: 6px;
  padding: 8px 10px;
  margin-bottom: 6px;
  font-size: 0.72rem;
}
.conj-item .conj-header { display: flex; justify-content: space-between; margin-bottom: 4px; }
.conj-item .conj-names { color: var(--text); font-weight: 500; }
.conj-item .conj-range { color: var(--red); font-weight: 600; }
.conj-item .conj-row { display: flex; justify-content: space-between; padding: 1px 0; }
.conj-item .conj-label { color: var(--text-dim); }
.conj-item .conj-value { color: var(--text); }

/* ISS crew */
.crew-count {
  font-size: 2rem; font-weight: 700; color: var(--accent);
  text-align: center; margin: 8px 0;
}
.crew-craft { margin-bottom: 10px; }
.crew-craft h4 { font-size: 0.78rem; color: var(--accent); margin-bottom: 4px; }
.crew-name {
  padding: 4px 8px;
  background: rgba(255,255,255,0.03);
  border-radius: 4px;
  margin-bottom: 3px;
  font-size: 0.75rem;
}

/* Launch cards */
.launch-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  padding: 10px 12px;
  margin-bottom: 8px;
}
.launch-card .launch-name { color: var(--text); font-weight: 600; font-size: 0.78rem; margin-bottom: 4px; }
.launch-card .launch-net { color: var(--accent); font-size: 0.72rem; margin-bottom: 6px; }
.launch-card .launch-row { display: flex; justify-content: space-between; font-size: 0.7rem; padding: 1px 0; }
.launch-card .launch-label { color: var(--text-dim); }
.launch-card .launch-value { color: var(--text); }
.launch-card .launch-status {
  display: inline-block; padding: 2px 6px;
  border-radius: 3px; font-size: 0.68rem; font-weight: 600;
}
.launch-status-go { background: rgba(46,213,115,0.15); color: var(--green); }
.launch-status-tbd { background: rgba(255,165,2,0.15); color: var(--yellow); }
.launch-status-tbc { background: rgba(77,171,247,0.15); color: var(--accent); }

/* ========== Modal ========== */
.modal {
  position: fixed; inset: 0;
  z-index: 100;
  background: rgba(0,0,0,0.6);
  display: flex; align-items: center; justify-content: center;
  backdrop-filter: blur(4px);
}
.modal-content {
  position: relative;
  width: 460px;
  max-width: 90vw;
  max-height: 80vh;
  overflow-y: auto;
}

/* Forms */
.form-row {
  margin-bottom: 12px;
}
.form-row label {
  display: block;
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}
.form-row input, .form-row select {
  width: 100%;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  padding: 7px 10px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.8rem;
  outline: none;
}
.form-row input:focus { border-color: var(--accent); }
.form-inline {
  display: flex; gap: 6px;
}
.form-inline input { flex: 1; }
.form-inline button {
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  color: var(--text-dim);
  padding: 6px 8px;
  cursor: pointer;
  display: flex; align-items: center;
}
.form-inline button:hover { color: var(--accent); border-color: var(--accent); }

.primary-btn {
  width: 100%;
  background: rgba(77, 171, 247, 0.2);
  border: 1px solid var(--accent);
  border-radius: 6px;
  color: var(--accent);
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 9px;
  cursor: pointer;
  transition: all 0.2s;
}
.primary-btn:hover { background: rgba(77, 171, 247, 0.35); }
.primary-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* Pass results */
.pass-item {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  padding: 8px 10px;
  margin-bottom: 6px;
}
.pass-item .pass-time { color: var(--accent); font-weight: 600; font-size: 0.78rem; margin-bottom: 3px; }
.pass-item .pass-row { display: flex; justify-content: space-between; font-size: 0.72rem; padding: 1px 0; }
.pass-item .pass-label { color: var(--text-dim); }
.pass-item .pass-value { color: var(--text); }

.no-results { color: var(--text-dim); text-align: center; padding: 20px; font-size: 0.8rem; }

/* Checkbox rows */
.checkbox-row { display: flex; align-items: center; }
.checkbox-label {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.75rem; color: var(--text-dim); cursor: pointer;
  text-transform: none; letter-spacing: normal;
}
.checkbox-label input[type="checkbox"] {
  width: auto; accent-color: var(--accent); cursor: pointer;
}

/* Decay items */
.decay-item {
  background: rgba(255,165,2,0.05);
  border: 1px solid rgba(255,165,2,0.2);
  border-radius: 6px;
  padding: 8px 10px;
  margin-bottom: 6px;
  font-size: 0.72rem;
}
.decay-item .decay-name { color: var(--text); font-weight: 500; margin-bottom: 3px; }
.decay-item .decay-row { display: flex; justify-content: space-between; padding: 1px 0; }
.decay-item .decay-label { color: var(--text-dim); }
.decay-item .decay-value { color: var(--text); }
.decay-item .decay-date { color: var(--yellow); font-weight: 600; }

#decay-panel { z-index: 12; }

/* ========== Time bar ========== */
#time-bar {
  position: fixed; bottom: 0; left: 0; right: 0;
  z-index: 20;
  height: 44px;
  display: flex; align-items: center; justify-content: center; gap: 24px;
  background: rgba(10, 14, 23, 0.75);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--panel-border);
  font-size: 0.82rem;
}
#utc-time { font-variant-numeric: tabular-nums; color: var(--text-dim); min-width: 200px; text-align: center; }

.time-controls {
  display: flex; align-items: center; gap: 6px;
}
.time-controls button {
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--panel-border);
  border-radius: 4px;
  color: var(--text);
  font-size: 0.85rem;
  padding: 4px 10px;
  cursor: pointer;
  transition: background 0.15s;
}
.time-controls button:hover { background: rgba(77, 171, 247, 0.2); }
#time-mult { color: var(--accent); font-weight: 600; min-width: 40px; text-align: center; }

/* ========== Reentry Countdown ========== */
.decay-countdown { font-size: 1.1rem; font-weight: 700; color: var(--accent); font-family: 'Courier New', monospace; }
.decay-countdown.urgent { color: var(--red); }
.decay-countdown.soon { color: var(--yellow); }
.decay-item { position: relative; }
.decay-item .decay-locate { position: absolute; top: 6px; right: 6px; background: none; border: 1px solid var(--accent); color: var(--accent); border-radius: 4px; padding: 2px 6px; font-size: 0.6rem; cursor: pointer; }
.decay-item .decay-locate:hover { background: var(--accent); color: #000; }

/* ========== Orbital Regimes ========== */
.regime-legend { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.regime-tag { display: flex; align-items: center; gap: 4px; font-size: 0.68rem; color: var(--text-dim); }
.regime-dot { width: 8px; height: 8px; border-radius: 50%; }

/* ========== Launch Countdown ========== */
.launch-countdown-hero { text-align: center; padding: 12px 0; border-bottom: 1px solid var(--panel-border); margin-bottom: 8px; }
.launch-countdown-timer { font-size: 1.6rem; font-weight: 700; color: var(--accent); font-family: 'Courier New', monospace; letter-spacing: 1px; }
.launch-countdown-label { font-size: 0.65rem; color: var(--text-dim); margin-top: 2px; }
.launch-countdown-name { font-size: 0.8rem; font-weight: 600; color: var(--text); margin-bottom: 4px; }
.launch-webcast { display: inline-block; margin-top: 6px; padding: 3px 10px; background: var(--red); color: #fff; border-radius: 4px; font-size: 0.65rem; text-decoration: none; font-weight: 600; }
.launch-pad-btn { background: none; border: 1px solid var(--accent); color: var(--accent); border-radius: 4px; padding: 1px 6px; font-size: 0.6rem; cursor: pointer; margin-left: 4px; }
.launch-pad-btn:hover { background: var(--accent); color: #000; }

/* ========== Starlink Panel ========== */
.starlink-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-bottom: 10px; }
.starlink-stat-box { background: rgba(77,171,247,0.08); border-radius: 6px; padding: 8px; text-align: center; }
.starlink-stat-val { font-size: 1.2rem; font-weight: 700; color: var(--accent); }
.starlink-stat-lbl { font-size: 0.6rem; color: var(--text-dim); }
.starlink-planes { font-size: 0.68rem; color: var(--text-dim); margin-top: 6px; }

/* ========== Kessler Simulator ========== */
#kessler-overlay { position: fixed; bottom: 48px; left: 0; right: 0; z-index: 200; pointer-events: none; }
#kessler-controls { pointer-events: all; background: rgba(2,4,8,0.92); backdrop-filter: blur(12px); padding: 12px 20px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
#kessler-year { font-size: 2rem; font-weight: 800; color: var(--accent); font-family: 'Courier New', monospace; min-width: 60px; }
#kessler-slider { flex: 1; min-width: 150px; accent-color: var(--accent); }
#kessler-stats { display: flex; gap: 10px; font-size: 0.7rem; color: var(--text-dim); align-items: center; }
.kessler-stat { display: flex; align-items: center; gap: 3px; }
#kessler-btns { display: flex; gap: 6px; }
#kessler-events { font-size: 0.65rem; color: var(--yellow); min-height: 16px; width: 100%; margin-top: 4px; }

/* ========== Collision Risk 3D ========== */
.collision-item { background: rgba(255,255,255,0.03); border: 1px solid var(--panel-border); border-radius: 6px; padding: 8px; margin-bottom: 6px; cursor: pointer; transition: border-color 0.15s; }
.collision-item:hover { border-color: var(--accent); }
.collision-item.high-risk { border-left: 3px solid var(--red); }
.collision-prob { font-size: 0.9rem; font-weight: 700; font-family: 'Courier New', monospace; }
.collision-prob.danger { color: var(--red); }
.collision-prob.warning { color: var(--yellow); }
.collision-prob.low { color: var(--green); }

/* ========== Ground Stations ========== */
.station-item { background: rgba(255,255,255,0.03); border: 1px solid var(--panel-border); border-radius: 6px; padding: 6px 8px; margin-bottom: 4px; cursor: pointer; transition: border-color 0.15s; }
.station-item:hover { border-color: var(--green); }
.station-name { font-size: 0.75rem; font-weight: 600; color: var(--text); }
.station-loc { font-size: 0.62rem; color: var(--text-dim); }
.station-online { color: var(--green); }

/* ========== AR Spotter ========== */
#ar-view { position: relative; }
#ar-canvas { border-radius: 8px; }

/* ========== Space Weather Gauges ========== */
.gauge-row { display: flex; gap: 8px; margin-bottom: 8px; }
.gauge-box { flex: 1; background: rgba(255,255,255,0.03); border: 1px solid var(--panel-border); border-radius: 8px; padding: 8px; text-align: center; }
.gauge-value { font-size: 1.4rem; font-weight: 700; font-family: 'Courier New', monospace; }
.gauge-label { font-size: 0.58rem; color: var(--text-dim); margin-top: 2px; }
.gauge-bar { height: 4px; border-radius: 2px; background: rgba(255,255,255,0.1); margin-top: 4px; overflow: hidden; }
.gauge-bar-fill { height: 100%; border-radius: 2px; transition: width 0.5s; }

/* ========== Sky Chart (Pass Predictor) ========== */
.sky-chart-container { position: relative; width: 240px; height: 240px; margin: 10px auto; }
#sky-chart { border-radius: 50%; background: rgba(0,0,0,0.5); border: 1px solid var(--panel-border); }

/* ========== Legend toggle button (mobile only) ========== */
.legend-toggle-btn {
  display: none;
  position: fixed;
  bottom: 52px;
  left: 10px;
  z-index: 25;
  background: var(--panel-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--panel-border);
  border-radius: 50%;
  width: 40px; height: 40px;
  color: var(--text-dim);
  cursor: pointer;
  align-items: center; justify-content: center;
  transition: all 0.2s;
}
.legend-toggle-btn:hover, .legend-toggle-btn.active {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(77, 171, 247, 0.15);
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
  /* Stats panel: hidden by default, slides in as overlay when toggled */
  #stats-panel {
    display: none;
    position: fixed;
    top: auto; bottom: 48px;
    left: 8px; right: 8px;
    width: auto;
    max-height: 50vh;
    z-index: 30;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
  }
  #stats-panel.mobile-open {
    display: block;
  }

  /* Show the toggle button */
  .legend-toggle-btn { display: flex; }

  /* Top bar: compact layout */
  #topbar {
    height: 46px;
    padding: 0 8px;
    gap: 6px;
    flex-wrap: nowrap;
  }
  .brand span { display: none; }
  .brand svg { width: 20px; height: 20px; }
  .search-box { max-width: 120px; flex: 0 1 120px; }
  .search-box input { padding: 5px 8px; font-size: 0.72rem; }
  .top-controls select { padding: 5px 6px; font-size: 0.7rem; }

  /* Toolbar: horizontally scrollable row */
  .toolbar-buttons {
    gap: 2px;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    flex-shrink: 0;
    max-width: 45vw;
  }
  .toolbar-buttons::-webkit-scrollbar { display: none; }
  .toolbar-btn { padding: 5px 6px; flex-shrink: 0; }
  .toolbar-btn svg { width: 14px; height: 14px; }

  /* Info panel: bottom sheet style */
  #info-panel {
    top: auto; bottom: 48px;
    right: 8px; left: 8px;
    width: auto;
    max-height: 45vh;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
  }
  .panel-header h3 { font-size: 0.85rem; }

  /* Side panels: bottom sheet style */
  .side-panel {
    left: 8px; right: 8px;
    width: auto;
    top: auto; bottom: 48px;
    max-height: 50vh;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
  }

  /* Time bar: compact */
  #time-bar {
    height: 40px;
    gap: 10px;
    font-size: 0.72rem;
    padding: 0 8px;
  }
  #utc-time { min-width: auto; font-size: 0.68rem; }
  .time-controls button { padding: 3px 7px; font-size: 0.75rem; }
  #time-mult { font-size: 0.72rem; min-width: 30px; }

  /* Modals: full-width on mobile */
  .modal-content { max-width: 95vw; max-height: 85vh; }

  /* Kessler overlay */
  #kessler-controls { padding: 8px 12px; gap: 8px; }
  #kessler-year { font-size: 1.4rem; min-width: 45px; }
  #kessler-stats { font-size: 0.62rem; gap: 6px; flex-wrap: wrap; }

  /* Search dropdown */
  .search-dropdown { max-height: 200px; }
}

/* Small phones */
@media (max-width: 420px) {
  .top-controls { display: none; }
  .search-box { flex: 1; max-width: none; }
  .toolbar-buttons { max-width: 40vw; }
  #info-panel { max-height: 40vh; }
  .side-panel { max-height: 45vh; }
  #time-bar { gap: 6px; }
  #utc-time { font-size: 0.62rem; }
  .legend-toggle-btn { bottom: 46px; left: 6px; width: 36px; height: 36px; }
  .legend-toggle-btn svg { width: 16px; height: 16px; }
}