/* FigureForge — Stylesheet
   Dual theme (dark default + light) over CSS variables, three-panel layout.
   Toggle via the ☀/🌙 toolbar button with the day/night sky transition.
   Control-panel design language (filled sliders, hairline sections, teal
   micro-labels, gradient panels) adapted from currve-arrow.yysuni.com. */

:root {
  --bg: #191e2a; --bg-panel: #1f2532; --bg-canvas: #151a27; --bg-input: #293042;
  --border: #364054; --text: #dde3f0; --text-dim: #93a0bc; --text-bright: #ffffff;
  --accent: #2fc4b2; --accent-dim: #1e4a45; --danger: #e53935; --success: #2e9e44;
  --selection: #2fc4b2; --radius: 4px;
  --shadow-canvas: 0 4px 20px rgba(0,0,0,0.45);
  --track: #3a4358; --thumb-ring: #59647c;
  --panel-grad: linear-gradient(165deg, #222939 0%, #1d2432 55%, #1b2a33 100%);
  --border-panel: rgba(47, 196, 178, 0.18);
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* Daylight (paper) theme — flipped by body.theme-light */
body.theme-light {
  --bg: #efece5; --bg-panel: #fbfaf7; --bg-canvas: #e9e6de; --bg-input: #ffffff;
  --border: #ddd8cd; --text: #33384a; --text-dim: #6d7386; --text-bright: #16192a;
  --accent: #0d9488; --accent-dim: #d9f0ec; --danger: #c62828; --success: #2e7d32;
  --selection: #0d9488;
  --shadow-canvas: 0 6px 24px rgba(48, 42, 30, 0.14);
  --track: #e7e3da; --thumb-ring: #cfc9bc;
  --panel-grad: linear-gradient(165deg, #ffffff 0%, #faf9f5 55%, #eff6f3 100%);
  --border-panel: rgba(13, 148, 136, 0.2);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: var(--font); background: var(--bg); color: var(--text); overflow: hidden; height: 100vh; font-size: 13px; }

#topbar { display: flex; align-items: center; justify-content: space-between; height: 50px; background: var(--bg-panel); border-bottom: 1px solid var(--border); padding: 0 14px; gap: 14px;
  background-image: linear-gradient(to bottom, rgba(255,255,255,0.028), transparent 55%); }
body.theme-light #topbar { background-image: linear-gradient(to bottom, rgba(255,255,255,0.75), transparent 55%); }
.logo { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.logo-mark { width: 27px; height: 27px; border-radius: 8px; box-shadow: 0 2px 8px rgba(13, 148, 136, 0.35); flex-shrink: 0; }
.logo-text { font-size: 14.5px; font-weight: 650; color: var(--text-bright); letter-spacing: 0.015em; }
.toolbar { display: flex; align-items: center; gap: 3px; }
.tool-btn { background: transparent; border: 1px solid transparent; color: var(--text-dim); width: 30px; height: 30px; border-radius: 8px; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: all 0.15s; }
.tool-btn svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.tool-btn:hover { background: var(--bg-input); border-color: var(--border); color: var(--text-bright); }
.tool-btn:disabled { opacity: 0.28; cursor: not-allowed; }
.tool-btn:disabled:hover { background: transparent; border-color: transparent; color: var(--text-dim); }
.tool-btn.active { background: var(--accent-dim); border-color: color-mix(in srgb, var(--accent) 55%, transparent); color: var(--accent); }
.tool-btn.ghost { border: none; background: transparent; }
.tool-btn.ghost:hover { border: none; background: var(--bg-input); }
.tool-sep { width: 1px; height: 18px; background: var(--border); margin: 0 6px; }
.zoom-display { font-size: 11px; color: var(--text-dim); min-width: 42px; text-align: center; font-variant-numeric: tabular-nums; }
.export-bar { display: flex; gap: 7px; align-items: center; }
.export-btn { display: inline-flex; align-items: center; gap: 6px; background: var(--bg-input); border: 1px solid var(--border); color: var(--text); padding: 6px 13px; border-radius: 9px; cursor: pointer; font-size: 12px; font-weight: 550; transition: all 0.15s; }
.export-btn svg { width: 14px; height: 14px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.export-btn kbd { font-family: var(--font); font-size: 10px; opacity: 0.62; border: 1px solid currentColor; border-radius: 4px; padding: 0 4px; line-height: 1.5; }
.export-btn:hover { background: var(--accent-dim); border-color: var(--accent); color: var(--text-bright); }
#btn-export-svg, #btn-export-do { background: linear-gradient(135deg, #14b8a6, #0d9488); border: none; color: #ffffff; font-weight: 600; box-shadow: 0 3px 12px rgba(20, 184, 166, 0.28); }
#btn-export-svg:hover, #btn-export-do:hover { filter: brightness(1.07); box-shadow: 0 4px 16px rgba(20, 184, 166, 0.36); border: none; color: #ffffff; }
#btn-export-svg kbd { border-color: rgba(255,255,255,0.5); }

#main-layout { display: flex; height: calc(100vh - 50px); }
#left-panel { width: 244px; background: var(--panel-grad); border-right: 1px solid var(--border-panel); overflow-y: auto; flex-shrink: 0; box-shadow: inset 1px 0 0 rgba(255,255,255,0.06); }
#right-panel { width: 262px; background: var(--panel-grad); border-left: 1px solid var(--border-panel); overflow-y: auto; flex-shrink: 0; display: flex; flex-direction: column; box-shadow: inset -1px 0 0 rgba(255,255,255,0.06); }
body.theme-light #left-panel, body.theme-light #right-panel { box-shadow: none; }
.panel-section { padding: 12px; border-bottom: 1px solid var(--border-panel); }
.panel-title { font-size: 10.5px; font-weight: 650; color: var(--accent); margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.1em; display: flex; align-items: center; gap: 6px; }
.panel-title::before { content: ''; width: 3px; height: 10px; border-radius: 2px; background: linear-gradient(to bottom, #2dd4bf, #0d9488); flex-shrink: 0; }

.template-gallery { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
.template-item { background: var(--bg-input); border: 1px solid var(--border); border-radius: 9px; padding: 6px; cursor: pointer; transition: all 0.16s; display: flex; flex-direction: column; align-items: stretch; gap: 5px; overflow: hidden; }
.template-item:hover { border-color: var(--accent); transform: translateY(-1.5px); box-shadow: 0 6px 18px rgba(0, 0, 0, 0.4); }
.template-item.selected { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.template-thumb { width: 100%; height: 72px; background: #fff; border-radius: 6px; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.template-thumb svg { max-width: 100%; max-height: 100%; }
.template-label { font-size: 11px; font-weight: 500; color: var(--text); opacity: 0.75; text-align: center; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; padding: 1px 0 2px; }
.template-item:hover .template-label, .template-item.selected .template-label { opacity: 1; color: var(--text-bright); }

.ai-section { display: flex; flex-direction: column; }
.ai-input { background: var(--bg-input); border: 1px solid var(--border); border-radius: var(--radius); color: var(--text); font-family: var(--font); font-size: 12px; padding: 6px; resize: vertical; width: 100%; }
.ai-input:focus { outline: none; border-color: var(--accent); }
.ai-controls { display: flex; gap: 4px; margin-top: 6px; }
.ai-select { background: var(--bg-input); border: 1px solid var(--border); color: var(--text); border-radius: var(--radius); padding: 4px; font-size: 11px; flex: 1; }
.ai-generate-btn { background: linear-gradient(90deg, #14b8a6, #0d9488); border: none; color: #ffffff; padding: 5px 14px; border-radius: 8px; cursor: pointer; font-size: 12px; font-weight: 600; transition: filter 0.15s, box-shadow 0.15s; white-space: nowrap; box-shadow: 0 4px 14px rgba(20, 184, 166, 0.25); }
.ai-generate-btn:hover { filter: brightness(1.05); box-shadow: 0 5px 16px rgba(20, 184, 166, 0.32); }
.ai-generate-btn:active { filter: brightness(0.94); box-shadow: 0 2px 8px rgba(20, 184, 166, 0.22); }
.ai-generate-btn:disabled { opacity: 0.5; cursor: wait; filter: none; }
.ai-status { font-size: 11px; color: var(--text-dim); margin-top: 4px; min-height: 14px; }
.ai-status.error { color: var(--danger); }
.ai-status.success { color: var(--success); }

#canvas-area { flex: 1; position: relative; overflow: hidden;
  background: radial-gradient(1100px 700px at 50% 38%, rgba(43, 184, 171, 0.06), transparent 62%), var(--bg-canvas);
  background-image: radial-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1.3px), radial-gradient(1100px 700px at 50% 38%, rgba(43, 184, 171, 0.06), transparent 62%);
  background-size: 24px 24px, auto; }
body.theme-light #canvas-area { background-image: radial-gradient(rgba(19, 24, 38, 0.08) 1px, transparent 1.3px), radial-gradient(1100px 700px at 50% 38%, rgba(13, 148, 136, 0.05), transparent 62%); background-size: 24px 24px, auto; }
#canvas-container { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; position: relative; }
.canvas-empty { text-align: center; color: var(--text-dim); background: color-mix(in srgb, var(--bg-panel) 86%, transparent); border: 1px solid var(--border-panel); border-radius: 18px; padding: 40px 54px; box-shadow: 0 18px 60px rgba(0, 0, 0, 0.42), inset 0 1px 0 rgba(255,255,255,0.05); }
.canvas-empty .empty-icon { font-size: 26px; width: 64px; height: 64px; display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; background: var(--accent-dim); border: 1px solid var(--border-panel); border-radius: 18px; color: var(--accent); }
.canvas-empty p { font-size: 15px; font-weight: 600; color: var(--text-bright); letter-spacing: 0.01em; }
.canvas-empty .empty-hint { font-size: 12px; font-weight: 400; color: var(--text-dim); opacity: 0.85; margin-top: 8px; line-height: 1.8; }
.canvas-empty .empty-hint { font-size: 12px; color: var(--text-dim); opacity: 0.6; margin-top: 4px; }
.svg-canvas { background: #ffffff; box-shadow: var(--shadow-canvas); position: relative; cursor: default; }
.svg-canvas.hidden { display: none; }
.canvas-empty.hidden { display: none; }
.svg-canvas.show-grid { background-image: linear-gradient(rgba(0,0,0,0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(0,0,0,0.04) 1px, transparent 1px); background-size: 10px 10px; }
.svg-canvas svg { display: block; }
.svg-canvas svg [data-edit="true"] { cursor: move; }
.svg-canvas svg text[data-edit="true"] { cursor: text; }
.selection-overlay { position: absolute; pointer-events: none; border: 1.5px solid var(--selection); border-radius: 2px; box-shadow: 0 0 0 1px rgba(74,158,255,0.3); display: none; }
.selection-overlay.active { display: block; }

/* Smart alignment guides (BioRender / Figma style) */
#guides-overlay { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; z-index: 30; overflow: visible; }
#guides-overlay .smart-guide { stroke: #e91e8c; stroke-width: 1; stroke-dasharray: none; opacity: 0.95; }
#guides-overlay .member-rect { fill: none; stroke: var(--selection); stroke-width: 1; stroke-dasharray: 3,3; opacity: 0.8; }
#guides-overlay .rubber-rect { fill: rgba(74,158,255,0.08); stroke: var(--selection); stroke-width: 1; stroke-dasharray: 4,3; }

/* Resize handles (single selection of rect / image / circle / ellipse) */
#guides-overlay .resize-handle { fill: #ffffff; stroke: var(--selection); stroke-width: 1.4; pointer-events: all; cursor: nwse-resize; }
#guides-overlay .resize-handle[data-corner="ne"],
#guides-overlay .resize-handle[data-corner="sw"] { cursor: nesw-resize; }
#guides-overlay .resize-handle:hover { fill: var(--selection); }

/* ── Align & distribute floating bar (appears on multi-select) ── */
.align-bar { position: absolute; left: 50%; top: 12px; transform: translateX(-50%); z-index: 40;
  display: flex; align-items: center; gap: 2px; padding: 4px 6px; border-radius: 12px;
  background: color-mix(in srgb, var(--bg-panel) 88%, transparent); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-panel); box-shadow: 0 8px 28px rgba(0,0,0,0.35); }
.align-bar.hidden { display: none; }
.align-btn { width: 30px; height: 30px; border-radius: 8px; border: none; background: transparent;
  color: var(--text); cursor: pointer; display: flex; align-items: center; justify-content: center;
  padding: 0; transition: all 0.13s; }
.align-btn svg { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.align-btn svg rect { fill: currentColor; fill-opacity: 0.28; stroke: none; }
.align-btn:hover:not(:disabled) { background: var(--bg-input); color: var(--text-bright); }
.align-btn:disabled { opacity: 0.3; cursor: not-allowed; }

/* ── Format painter mode ── */
body.paint-picking #svg-canvas svg { cursor: copy; }
body.paint-picking #svg-canvas svg [data-edit="true"][data-selected="true"] { outline: none; }
body.paint-picking #btn-format-paint { background: var(--accent-dim); border-color: var(--accent); color: var(--text-bright); animation: paint-pulse 1.6s ease infinite; }
@keyframes paint-pulse { 0%, 100% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 45%, transparent); } 50% { box-shadow: 0 0 0 5px color-mix(in srgb, var(--accent) 12%, transparent); } }

/* Crop overlay (image crop mode) */
#guides-overlay .crop-shade { fill: rgba(10, 12, 18, 0.45); pointer-events: none; }
#guides-overlay .crop-rect { fill: rgba(43, 184, 171, 0.04); stroke: var(--selection); stroke-width: 1.4; pointer-events: all; cursor: move; }
#guides-overlay .crop-handle { fill: #ffffff; stroke: var(--selection); stroke-width: 1.4; pointer-events: all; cursor: nwse-resize; }
#guides-overlay .crop-handle[data-crop-handle="n"],
#guides-overlay .crop-handle[data-crop-handle="s"] { cursor: ns-resize; }
#guides-overlay .crop-handle[data-crop-handle="e"],
#guides-overlay .crop-handle[data-crop-handle="w"] { cursor: ew-resize; }
#guides-overlay .crop-handle[data-crop-handle="ne"],
#guides-overlay .crop-handle[data-crop-handle="sw"] { cursor: nesw-resize; }

/* Inline text editor (textarea — supports multi-line) */
.text-editor { position: absolute; display: none; z-index: 40; background: rgba(255,255,255,0.96); border: 1px solid var(--accent); border-radius: 2px; padding: 0 3px; outline: none; font-family: var(--font); pointer-events: auto; resize: none; overflow: hidden; white-space: pre; box-sizing: border-box; }
.text-editor.active { display: block; }

/* Toolbar extras */
.text-btn { font-weight: 700; font-family: Georgia, serif; }
#btn-collapse-left { margin-right: 4px; }

/* Left panel collapse */
#left-panel { transition: width 0.15s ease; overflow-x: hidden; }
#left-panel.collapsed { width: 0 !important; border-right: none; padding: 0; }

/* Panel section header row */
.panel-title-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 6px; gap: 4px; }
.panel-title-row .panel-title { margin-bottom: 0; }
.panel-title-actions { display: flex; gap: 3px; }
.mini-btn { background: var(--bg-input); border: 1px solid var(--border); color: var(--text-dim); border-radius: 6px; font-size: 10.5px; font-weight: 550; padding: 3px 8px; cursor: pointer; white-space: nowrap; transition: all 0.15s; }
.mini-btn:hover { border-color: var(--accent); color: var(--text-bright); }

/* Folders */
.folder-row { grid-column: 1 / -1; display: flex; align-items: center; gap: 5px; padding: 4px 6px; background: var(--bg-input); border: 1px solid var(--border); border-radius: var(--radius); cursor: pointer; font-size: 12px; color: var(--text); user-select: none; }
.folder-row:hover { border-color: var(--accent); }
.folder-toggle { width: 10px; color: var(--text-dim); font-size: 9px; }
.folder-icon { font-size: 12px; }
.folder-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.folder-count { font-size: 10px; color: var(--text-dim); background: var(--bg-panel); border-radius: 8px; padding: 0 6px; }
.inline-rename { background: var(--bg-panel); border: 1px solid var(--accent); color: var(--text-bright); font-size: 10px; border-radius: 2px; padding: 1px 3px; width: 100%; min-width: 0; outline: none; font-family: var(--font); }

/* Property panel buttons */
.prop-btn { background: var(--bg-input); border: 1px solid var(--border); color: var(--text); border-radius: var(--radius); font-size: 11px; padding: 4px 8px; cursor: pointer; flex: 1; transition: all 0.15s; }
.prop-btn:hover { border-color: var(--accent); }
.prop-btn.danger { color: var(--danger); }
.prop-btn.danger:hover { background: rgba(229,57,53,0.15); }

/* Background controls */
.bg-controls { display: flex; align-items: center; gap: 6px; flex: 1; }
.bg-controls input[type="color"] { width: 30px; height: 24px; border: 1px solid var(--border-panel); border-radius: 6px; background: none; cursor: pointer; padding: 0; }
.check-label { font-size: 11px; font-weight: 500; color: var(--text-dim); display: flex; align-items: center; gap: 4px; white-space: nowrap; cursor: pointer; border: 1px solid var(--border-panel); border-radius: 8px; padding: 3px 8px; transition: border-color 0.15s, background-color 0.15s, color 0.15s; }
.check-label:hover { border-color: color-mix(in srgb, var(--accent) 45%, transparent); }
.check-label:has(input:checked) { border-color: color-mix(in srgb, var(--accent) 50%, transparent); background: color-mix(in srgb, var(--accent) 10%, transparent); color: var(--text); }
input[type="checkbox"], input[type="radio"] { accent-color: var(--accent); }

/* Modals */
.modal { position: fixed; inset: 0; background: rgba(0,0,0,0.55); z-index: 500; display: flex; align-items: center; justify-content: center; }
.modal.hidden { display: none; }
.modal-box { background: var(--bg-panel); border: 1px solid var(--border); border-radius: 14px; padding: 20px 22px; width: 420px; max-width: 92vw; max-height: 86vh; overflow-y: auto; box-shadow: 0 20px 60px rgba(0,0,0,0.5); }
.modal-title { font-size: 14px; color: var(--text-bright); margin-bottom: 14px; }
.modal-row { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; flex-wrap: wrap; }
.modal-label { font-size: 12px; color: var(--text-dim); min-width: 52px; }
.modal-hint { font-size: 11px; color: var(--text-dim); margin: 4px 0 12px 0; min-height: 14px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; }
.seg-group { display: flex; gap: 4px; flex-wrap: wrap; }
.seg-btn { background: var(--bg-input); border: 1px solid var(--border); color: var(--text); border-radius: var(--radius); font-size: 12px; padding: 5px 12px; cursor: pointer; transition: all 0.15s; }
.seg-btn:hover { border-color: var(--accent); }
.seg-btn.active { background: color-mix(in srgb, var(--accent) 12%, transparent); border-color: color-mix(in srgb, var(--accent) 50%, transparent); color: var(--text-bright); font-weight: 600; }
.radio-label { display: flex; align-items: center; gap: 5px; }

/* Help modal */
.help-grid { display: grid; grid-template-columns: auto 1fr; gap: 6px 16px; font-size: 12px; margin-bottom: 12px; }
.help-grid span:nth-child(odd) { color: var(--text-dim); }
.help-grid span:nth-child(even) { color: var(--text-bright); font-family: monospace; }

/* Drop hover state */
#canvas-area.drop-hover::after { content: '松手放入 SVG / 图片'; position: absolute; inset: 12px; border: 2px dashed var(--accent); border-radius: 8px; display: flex; align-items: center; justify-content: center; color: var(--text-bright); font-size: 15px; background: rgba(74,158,255,0.08); pointer-events: none; z-index: 50; }


.context-menu { position: absolute; background: var(--bg-panel); border: 1px solid var(--border); border-radius: 11px; box-shadow: 0 10px 32px rgba(0,0,0,0.45); z-index: 100; min-width: 150px; padding: 5px; }
.context-menu.hidden { display: none; }
.context-menu-item { padding: 7px 11px; cursor: pointer; font-size: 12px; color: var(--text); display: flex; align-items: center; gap: 7px; border-radius: 7px; }
.context-menu-item:hover { background: var(--accent-dim); }
.context-menu-item.danger { color: var(--danger); }
.context-menu-item.danger:hover { background: rgba(229,57,53,0.2); }
.context-menu-sep { height: 1px; background: var(--border); margin: 4px 0; }

.prop-empty { padding: 20px; text-align: center; color: var(--text-dim); font-size: 12px; }
.prop-panel.hidden { display: none; }
.prop-panel { padding: 8px; flex: 1; }
.prop-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 7px; gap: 8px; }
.prop-row label { font-size: 11.5px; font-weight: 500; color: var(--text-dim); flex-shrink: 0; min-width: 4.5rem; }
.prop-input, .prop-select { background: var(--bg-input); border: 1px solid var(--border); color: var(--text); border-radius: 7px; padding: 4px 8px; font-size: 12px; flex: 1; min-width: 0; font-family: var(--font); transition: border-color 0.15s; }
.prop-input:focus, .prop-select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 2.5px color-mix(in srgb, var(--accent) 14%, transparent); }
.prop-color { display: flex; align-items: center; gap: 4px; flex: 1; }
.prop-color input[type="color"] { width: 30px; height: 24px; border: 1px solid var(--border-panel); border-radius: 6px; cursor: pointer; background: none; padding: 0; }
.prop-color input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
.prop-color input[type="color"]::-webkit-color-swatch { border: none; border-radius: 2px; }
.prop-color input[type="text"] { background: var(--bg-input); border: 1px solid var(--border); color: var(--text); border-radius: var(--radius); padding: 3px 4px; font-size: 11px; flex: 1; min-width: 0; font-family: monospace; }
.prop-slider { display: flex; align-items: center; gap: 7px; flex: 1; min-width: 0; }
.prop-slider input[type="range"] { flex: 1; min-width: 0; height: 1.25rem; -webkit-appearance: none; appearance: none; background: transparent; cursor: pointer; }
.prop-slider input[type="range"]::-webkit-slider-runnable-track { height: 6px; border-radius: 9999px; background: linear-gradient(to right, var(--accent) 0%, var(--accent) var(--slider-fill, 0%), var(--track) var(--slider-fill, 0%), var(--track) 100%); }
.prop-slider input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 15px; height: 15px; border-radius: 50%; background: #ffffff; margin-top: -4.5px; border: none; box-shadow: 0 0 0 1px var(--thumb-ring), 0 2px 6px rgba(15,23,42,0.1); transition: box-shadow 0.15s; }
.prop-slider input[type="range"]:hover::-webkit-slider-thumb { box-shadow: 0 0 0 1.5px var(--accent), 0 2px 8px rgba(15,23,42,0.14); }
.prop-slider input[type="range"]:active::-webkit-slider-thumb { box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 30%, transparent), 0 1px 4px rgba(15,23,42,0.1); }
.prop-slider input[type="range"]::-moz-range-track { height: 6px; border-radius: 9999px; background: linear-gradient(to right, var(--accent) 0%, var(--accent) var(--slider-fill, 0%), var(--track) var(--slider-fill, 0%), var(--track) 100%); }
.prop-slider input[type="range"]::-moz-range-thumb { width: 14px; height: 14px; border-radius: 50%; background: #ffffff; border: none; box-shadow: 0 0 0 1px var(--thumb-ring), 0 2px 6px rgba(15,23,42,0.1); }
.prop-slider input[type="range"]:hover::-moz-range-thumb { box-shadow: 0 0 0 1.5px var(--accent), 0 2px 8px rgba(15,23,42,0.14); }
.slider-num { width: 3.25rem; flex-shrink: 0; background: var(--bg-input); border: 1px solid var(--border); color: var(--text); border-radius: 6px; padding: 2px 4px; font-size: 11px; text-align: right; font-variant-numeric: tabular-nums; font-family: var(--font); }
.slider-num:focus { outline: none; border-color: var(--accent); }
.slider-num::-webkit-outer-spin-button, .slider-num::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.prop-section-header { font-size: 11px; font-weight: 600; color: var(--accent); text-transform: uppercase; letter-spacing: 0.09em; margin: 8px 0 4px 0; padding-bottom: 2px; border-bottom: 1px solid var(--border-panel); }
.link-hint { font-size: 10.5px; color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, transparent); border-radius: 6px; padding: 3px 8px; width: 100%; }
.global-section { margin-top: auto; }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-panel); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }
.hidden { display: none !important; }

.ff-toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px); background: color-mix(in srgb, var(--bg-panel) 92%, transparent); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border: 1px solid var(--border-panel); color: var(--text); padding: 9px 18px; border-radius: 11px; font-size: 12px; box-shadow: 0 10px 32px rgba(0,0,0,0.45); z-index: 1000; opacity: 0; pointer-events: none; transition: all 0.25s; }
.ff-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* Light-theme detail overrides */
body.theme-light .modal { background: rgba(35, 42, 60, 0.4); }
body.theme-light .ff-toast { box-shadow: 0 6px 18px rgba(30, 42, 68, 0.18); }
body.theme-light .text-editor { background: rgba(255, 255, 255, 0.98); }
body.theme-light .inline-rename { background: var(--bg-input); }

/* Gentle color transition for a theme flip without the sky (reduced motion) */
body, #topbar, #left-panel, #right-panel, .panel-section, .tool-btn, .export-btn,
.mini-btn, .prop-btn, .seg-btn, .prop-input, .prop-select, .ai-input, .ai-select,
.modal-box, .context-menu, .folder-row, .inline-rename, .template-item {
  transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

/* ═══ Day/Night theme transition sky (ported from 88lin/HeoLume 5d4a5be,
       renamed ff-; timings are injected as --ff-dn-* by js/daynight.js) ═══ */
.ff-daynight {
  --ff-dn-orb: 6rem;
  --ff-dn-drop: 46vh;
  --ff-dn-apex: 10vh;
  --ff-dn-radius: calc(100vh + var(--ff-dn-drop) - var(--ff-dn-apex));
  position: fixed;
  inset: 0;
  z-index: 2147483000;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--ff-dn-fade-in, 380ms) ease-out;
}
.ff-daynight.is-visible { opacity: 1; }
.ff-daynight.is-leaving { opacity: 0; transition: opacity var(--ff-dn-fade-out, 700ms) cubic-bezier(0.4, 0, 0.2, 1); }

.ff-daynight__layer { position: absolute; inset: 0; }
.ff-daynight__layer--day {
  background: linear-gradient(to top, #f8cd71 0%, #ffc178 20%, #7fe3f0 66%, #5bfde9 100%);
}
.ff-daynight__layer--night {
  background: linear-gradient(to top, #30cfd0 0%, #1c3f8f 42%, #330867 100%);
  opacity: 0;
  transition: opacity var(--ff-dn-cross, 1150ms) ease-in-out var(--ff-dn-cross-delay, 260ms);
}
.ff-daynight--to-light .ff-daynight__layer--night { opacity: 1; }
.ff-daynight--to-dark.is-shifting .ff-daynight__layer--night { opacity: 1; }
.ff-daynight--to-light.is-shifting .ff-daynight__layer--night { opacity: 0; }

.ff-daynight__stars {
  position: absolute;
  inset: 0;
  background-repeat: no-repeat;
  animation: ffDayNightTwinkle var(--ff-dn-tw, 3.4s) ease-in-out var(--ff-dn-tw-shift, 0s) infinite alternate;
}
.ff-daynight__stars--far {
  --ff-dn-tw: 4.6s; --ff-dn-tw-shift: -0.9s; --ff-dn-tw-min: 0.45;
  background-image:
    radial-gradient(1.5px 1.5px at 4% 16%, #fffd, #fff0),
    radial-gradient(1.2px 1.2px at 11% 34%, #d6e5ffcc, #fff0),
    radial-gradient(1.4px 1.4px at 19% 8%, #fffe, #fff0),
    radial-gradient(1.1px 1.1px at 24% 27%, #fffb, #fff0),
    radial-gradient(1.5px 1.5px at 31% 46%, #fff6e8cc, #fff0),
    radial-gradient(1.2px 1.2px at 37% 13%, #fffd, #fff0),
    radial-gradient(1.4px 1.4px at 44% 30%, #d6e5ffcc, #fff0),
    radial-gradient(1.1px 1.1px at 52% 52%, #fffb, #fff0),
    radial-gradient(1.5px 1.5px at 58% 9%, #fffe, #fff0),
    radial-gradient(1.2px 1.2px at 64% 36%, #fffc, #fff0),
    radial-gradient(1.4px 1.4px at 71% 19%, #fff6e8d9, #fff0),
    radial-gradient(1.1px 1.1px at 79% 44%, #fffb, #fff0),
    radial-gradient(1.5px 1.5px at 86% 12%, #fffe, #fff0),
    radial-gradient(1.2px 1.2px at 91% 31%, #d6e5ffcc, #fff0),
    radial-gradient(1.4px 1.4px at 96% 23%, #fffd, #fff0),
    radial-gradient(1.1px 1.1px at 8% 58%, #fffa, #fff0);
}
.ff-daynight__stars--mid {
  --ff-dn-tw: 3.4s; --ff-dn-tw-shift: -2.1s; --ff-dn-tw-min: 0.3;
  background-image:
    radial-gradient(2.2px 2.2px at 9% 25%, #fff, #fff0),
    radial-gradient(1.8px 1.8px at 17% 45%, #fffd, #fff0),
    radial-gradient(2.4px 2.4px at 28% 15%, #fff, #fff0),
    radial-gradient(1.8px 1.8px at 35% 36%, #fffd, #fff0),
    radial-gradient(2.2px 2.2px at 47% 21%, #fff, #fff0),
    radial-gradient(1.8px 1.8px at 56% 41%, #fffd, #fff0),
    radial-gradient(2.4px 2.4px at 68% 10%, #fff, #fff0),
    radial-gradient(2px 2px at 75% 30%, #fffe, #fff0),
    radial-gradient(1.8px 1.8px at 88% 47%, #fffd, #fff0);
}
.ff-daynight__stars--near {
  --ff-dn-tw: 2.8s; --ff-dn-tw-shift: -1.3s; --ff-dn-tw-min: 0.55;
  background-image:
    radial-gradient(8px 8px at 22% 18%, #fff 0%, #fff9 16%, #fff0 62%),
    radial-gradient(6px 6px at 41% 7%, #fff 0%, #fff9 18%, #fff0 65%),
    radial-gradient(9px 9px at 62% 27%, #fff 0%, #fff8 14%, #fff0 60%),
    radial-gradient(6px 6px at 81% 14%, #fff 0%, #fff9 18%, #fff0 65%),
    radial-gradient(7px 7px at 93% 39%, #fff 0%, #fff8 16%, #fff0 62%);
}
@keyframes ffDayNightTwinkle {
  from { opacity: var(--ff-dn-tw-min, 0.4); }
  to { opacity: 1; }
}

.ff-daynight__spark {
  --ff-dn-spark: 28px;
  position: absolute;
  width: var(--ff-dn-spark);
  height: var(--ff-dn-spark);
  margin-left: calc(var(--ff-dn-spark) / -2);
  margin-top: calc(var(--ff-dn-spark) / -2);
  background: radial-gradient(closest-side, #fffd, #fff6 22%, #fff0 70%);
  animation: ffDayNightSparkle 3.6s ease-in-out infinite;
}
.ff-daynight__spark::before,
.ff-daynight__spark::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: linear-gradient(to right, #fff0, #fffe 50%, #fff0);
}
.ff-daynight__spark::before { width: 100%; height: 1.5px; }
.ff-daynight__spark::after { width: 1.5px; height: 100%; background: linear-gradient(to bottom, #fff0, #fffe 50%, #fff0); }
.ff-daynight__spark--a { --ff-dn-spark: 30px; left: 17%; top: 21%; animation-delay: -0.4s; }
.ff-daynight__spark--b { --ff-dn-spark: 22px; left: 76%; top: 14%; animation-delay: -1.9s; }
.ff-daynight__spark--c { --ff-dn-spark: 17px; left: 47%; top: 38%; animation-delay: -2.8s; }
@keyframes ffDayNightSparkle {
  0%, 100% { opacity: 0.3; transform: scale(0.7) rotate(0deg); }
  50% { opacity: 1; transform: scale(1) rotate(18deg); }
}

.ff-daynight__meteor {
  position: absolute;
  left: 46%;
  top: 11%;
  width: 16vw;
  min-width: 100px;
  height: 2px;
  border-radius: 2px;
  opacity: 0;
  transform-origin: 100% 50%;
  background: linear-gradient(to right, #fff0, #fff4 45%, #fffe);
}
.ff-daynight--to-dark .ff-daynight__meteor {
  animation: ffDayNightMeteor var(--ff-dn-meteor, 850ms) cubic-bezier(0.3, 0, 0.6, 1) var(--ff-dn-meteor-delay, 880ms) both;
}
@keyframes ffDayNightMeteor {
  0% { opacity: 0; transform: rotate(24deg) translateX(-6vw) scaleX(0.3); }
  25%, 70% { opacity: 1; }
  100% { opacity: 0; transform: rotate(24deg) translateX(34vw) scaleX(1); }
}

.ff-daynight__orbit {
  position: absolute;
  left: 50%;
  top: calc(100vh + var(--ff-dn-drop));
  width: 0;
  height: 0;
  transform-origin: 0 0;
  animation: ffDayNightSweep var(--ff-dn-arc, 1600ms) cubic-bezier(0.75, 0.03, 0.15, 1) both;
}
@keyframes ffDayNightSweep {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.ff-daynight__orb {
  position: absolute;
  left: 0;
  top: calc(-1 * var(--ff-dn-radius));
  width: var(--ff-dn-orb);
  height: var(--ff-dn-orb);
  margin-left: calc(var(--ff-dn-orb) / -2);
  margin-top: calc(var(--ff-dn-orb) / -2);
  border-radius: 50%;
  transition: opacity var(--ff-dn-swap, 320ms) ease-in-out var(--ff-dn-swap-delay, 640ms);
}
.ff-daynight__orb--sun {
  background: radial-gradient(circle at 36% 32%, #fffdf0 0%, #ffee94 42%, #ffd45e 100%);
  box-shadow: 0 0 30px 6px rgba(255, 238, 148, 0.85), 0 0 90px 28px rgba(255, 190, 84, 0.4);
}
.ff-daynight__orb--moon {
  box-shadow: calc(var(--ff-dn-orb) * -0.3) calc(var(--ff-dn-orb) * 0.3) 0 calc(var(--ff-dn-orb) * 0.035) #fdfdff;
  filter: drop-shadow(0 0 16px rgba(255, 255, 255, 0.5));
}
/* Resting state: the incoming orb is hidden (to-dark starts with sun,
   to-light starts with moon); .is-shifting swaps them mid-arc */
.ff-daynight--to-dark .ff-daynight__orb--moon,
.ff-daynight--to-light .ff-daynight__orb--sun { opacity: 0; }
.ff-daynight--to-dark.is-shifting .ff-daynight__orb--sun,
.ff-daynight--to-light.is-shifting .ff-daynight__orb--moon { opacity: 0; }
.ff-daynight--to-dark.is-shifting .ff-daynight__orb--moon,
.ff-daynight--to-light.is-shifting .ff-daynight__orb--sun { opacity: 1; }

@media (max-width: 640px) {
  .ff-daynight { --ff-dn-orb: 4.2rem; --ff-dn-apex: 7vh; }
}

@media (prefers-reduced-motion: reduce) {
  .ff-daynight { display: none; }
}