/* ======================================================
   引力沙盒 · Gravity Sandbox  — 暗色太空主题
   ====================================================== */

:root {
  --bg: #05060a;
  --bg-panel: rgba(14, 18, 30, 0.82);
  --bg-panel-solid: #0e121e;
  --border: rgba(120, 160, 220, 0.18);
  --border-strong: rgba(120, 160, 220, 0.32);
  --text: #e6ecf7;
  --text-dim: #90a0c0;
  --text-mute: #5a6a88;
  --accent: #6ea8ff;
  --accent-strong: #4f8dff;
  --accent-warm: #ffb36e;
  --danger: #ff6b6b;
  --ok: #5dd39e;
  --font: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", "Consolas", ui-monospace, monospace;
  --shadow: 0 6px 24px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.03) inset;
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 13px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

#scene-container {
  position: fixed;
  inset: 0;
  z-index: 0;
}
#scene-container canvas { display: block; }

/* ---------- 通用面板 ---------- */
.panel {
  background: var(--bg-panel);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
}

/* ---------- 左上工具栏 ---------- */
#toolbar {
  position: fixed;
  top: 14px;
  left: 14px;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 14px;
}
.title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.3px;
}
.title-icon { font-size: 18px; }
.toolbar-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn {
  background: rgba(120, 160, 220, 0.08);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  font-family: inherit;
  font-size: 12px;
  cursor: pointer;
  transition: background .15s, border-color .15s, transform .05s;
}
.btn:hover { background: rgba(120, 160, 220, 0.18); border-color: var(--border-strong); }
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: linear-gradient(180deg, var(--accent-strong), #3a6fd9);
  border-color: transparent;
  color: white;
}
.btn-primary:hover { filter: brightness(1.1); }
.btn-icon { padding: 6px 9px; }
.btn-danger { color: var(--danger); border-color: rgba(255, 107, 107, 0.3); }
.btn-sm { padding: 4px 9px; font-size: 11px; }
.btn-block { width: 100%; margin-top: 6px; }

.select {
  background: rgba(120, 160, 220, 0.08);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 9px;
  font-family: inherit;
  font-size: 12px;
  cursor: pointer;
}
.select option { background: var(--bg-panel-solid); }

/* ---------- 右侧栏 ---------- */
#sidebar {
  position: fixed;
  top: 14px;
  right: 14px;
  bottom: 50px;
  width: 290px;
  z-index: 10;
  padding: 14px;
  overflow-y: auto;
  transition: transform .25s ease;
}
#sidebar.collapsed { transform: translateX(calc(100% + 28px)); }

#sidebar::-webkit-scrollbar { width: 6px; }
#sidebar::-webkit-scrollbar-thumb {
  background: rgba(120, 160, 220, 0.25);
  border-radius: 3px;
}

.sidebar-section {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.sidebar-section:last-child { border-bottom: none; }

.section-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-dim);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.count-badge {
  background: rgba(110, 168, 255, 0.18);
  color: var(--accent);
  font-size: 10px;
  padding: 2px 7px;
  border-radius: 10px;
  font-weight: 600;
  letter-spacing: 0;
}

.control-row {
  display: grid;
  grid-template-columns: 80px 1fr 42px;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}
.control-row label {
  font-size: 12px;
  color: var(--text-dim);
}
.control-row .value {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  text-align: right;
}
.toggle-row { grid-template-columns: 1fr; }
.toggle-row label {
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 2px 0;
}
.toggle-row input[type="checkbox"] { accent-color: var(--accent); }

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: rgba(120, 160, 220, 0.18);
  border-radius: 2px;
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 13px;
  height: 13px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid var(--bg-panel-solid);
  box-shadow: 0 0 6px rgba(110, 168, 255, 0.6);
}
input[type="range"]::-moz-range-thumb {
  width: 13px;
  height: 13px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid var(--bg-panel-solid);
}

input[type="number"], input[type="text"] {
  width: 100%;
  background: rgba(0, 0, 0, 0.3);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 6px;
  font-family: var(--mono);
  font-size: 11px;
}
input[type="number"]:focus { border-color: var(--accent); outline: none; }
input[disabled] { color: var(--text-mute); }

/* ---------- 添加天体表单 ---------- */
.add-form {
  margin-top: 10px;
  padding: 10px;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border);
  border-radius: 6px;
}
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 8px;
}
.form-grid label {
  font-size: 11px;
  color: var(--text-dim);
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.form-actions {
  display: flex;
  gap: 6px;
  margin-top: 8px;
  justify-content: flex-end;
}

/* ---------- 天体列表 ---------- */
.body-list {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 280px;
  overflow-y: auto;
}
.body-list::-webkit-scrollbar { width: 4px; }
.body-list::-webkit-scrollbar-thumb { background: rgba(120,160,220,.25); border-radius: 2px; }

.body-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  background: rgba(120, 160, 220, 0.05);
  border: 1px solid transparent;
  border-radius: 6px;
  cursor: pointer;
  transition: background .15s, border-color .15s;
}
.body-row:hover {
  background: rgba(120, 160, 220, 0.12);
  border-color: var(--border);
}
.body-swatch {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 0 6px currentColor;
}
.body-info {
  flex: 1;
  min-width: 0;
  font-size: 12px;
}
.body-name {
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.body-meta {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-mute);
}
.body-del {
  background: transparent;
  border: none;
  color: var(--text-mute);
  cursor: pointer;
  font-size: 14px;
  padding: 2px 4px;
  border-radius: 4px;
  transition: color .15s, background .15s;
}
.body-del:hover { color: var(--danger); background: rgba(255, 107, 107, 0.1); }

/* ---------- 帮助面板 ---------- */
.help-panel {
  font-size: 12px;
  color: var(--text-dim);
}
.help-panel h4 {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-dim);
  margin: 10px 0 4px;
}
.help-panel p { margin-bottom: 6px; }
.help-panel ul { padding-left: 16px; margin-bottom: 6px; }
.help-panel li { margin-bottom: 2px; }
.help-panel code {
  background: rgba(110, 168, 255, 0.12);
  color: var(--accent);
  padding: 1px 5px;
  border-radius: 3px;
  font-family: var(--mono);
  font-size: 11px;
}
.help-panel b { color: var(--text); }
.link-btn {
  background: none;
  border: none;
  color: var(--accent);
  font-size: 11px;
  cursor: pointer;
  font-family: inherit;
  padding: 0;
}
.link-btn:hover { text-decoration: underline; }

/* ---------- 底部状态栏 ---------- */
.statusbar {
  position: fixed;
  bottom: 10px;
  left: 14px;
  z-index: 10;
  padding: 6px 14px;
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
}
.status-pill {
  background: rgba(255, 179, 110, 0.15);
  color: var(--accent-warm);
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 600;
}
.status-msg {
  color: var(--accent);
  margin-left: auto;
}

/* ---------- 浮层 / Toast ---------- */
.overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(5, 6, 10, 0.75);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
}
.overlay-card {
  max-width: 460px;
  padding: 28px 30px;
  text-align: left;
}
.overlay-card h2 {
  font-size: 20px;
  margin-bottom: 10px;
  background: linear-gradient(90deg, var(--accent), var(--accent-warm));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.overlay-card p { margin-bottom: 8px; color: var(--text-dim); }
.overlay-card ul {
  padding-left: 18px;
  margin: 10px 0 14px;
  color: var(--text-dim);
}
.overlay-card li { margin-bottom: 4px; }
.overlay-card b { color: var(--text); }
.overlay-card .hint {
  padding: 8px 10px;
  background: rgba(110, 168, 255, 0.08);
  border-left: 2px solid var(--accent);
  border-radius: 3px;
  font-size: 12px;
  margin: 12px 0 16px;
}
.overlay-card .btn { margin-top: 8px; padding: 9px 18px; font-size: 13px; }

.toast {
  position: fixed;
  bottom: 60px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 50;
  background: var(--bg-panel-solid);
  border: 1px solid var(--border-strong);
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 12px;
  color: var(--text);
  box-shadow: var(--shadow);
  animation: toast-in .2s ease;
}
@keyframes toast-in {
  from { opacity: 0; transform: translate(-50%, 10px); }
  to   { opacity: 1; transform: translate(-50%, 0); }
}

.hidden { display: none !important; }

/* ---------- 响应式 ---------- */
@media (max-width: 720px) {
  #sidebar { width: calc(100% - 28px); bottom: auto; max-height: 60vh; }
  .statusbar { font-size: 10px; gap: 10px; padding: 5px 10px; }
}