/* Copied from assets/css/main.css at build time. */
/* 基础样式与响应式布局 - 儿童友好化设计 */
/* 浅色主题（默认，儿童友好风格） */
:root{
  --bg: linear-gradient(135deg, #F3F4F6 0%, #EFF6FF 100%);
  --card: #FFFFFF;
  --muted: #6B7280;
  --accent: #2563EB;
  --accent-2: #059669;
  --accent-3: #F59E0B;
  --danger: #DC2626;
  --warn: #D97706;
  --text: #111827;
  --success: #16A34A;
  --navbar-bg: rgba(255,255,255,0.92);
  --navbar-border: rgba(37,99,235,0.18);
  --card-bg: linear-gradient(145deg, #FFFFFF 0%, #F8FAFC 100%);
  --card-border: rgba(37,99,235,0.12);
  --card-shadow: 0 10px 25px rgba(17,24,39,0.06), 0 4px 10px rgba(0,0,0,0.05);
  --input-bg: #FFFFFF;
  --input-border: rgba(17,24,39,0.12);
  --input-focus: var(--accent);
  --nav-hover: rgba(37,99,235,0.08);
  --badge-bg: linear-gradient(135deg, #F3F4F6, #EFF6FF);
  --body-bg: var(--bg);
}

[data-theme="dark"]{
  --bg: linear-gradient(135deg, #0F172A 0%, #1F2937 100%);
  --card: #111827;
  --muted: #9CA3AF;
  --accent: #60A5FA;
  --accent-2: #34D399;
  --accent-3: #FBBF24;
  --danger: #F87171;
  --warn: #F59E0B;
  --text: #F9FAFB;
  --success: #86EFAC;
  --navbar-bg: rgba(17,24,39,0.9);
  --navbar-border: rgba(96,165,250,0.28);
  --card-bg: linear-gradient(145deg, #111827 0%, #1F2937 100%);
  --card-border: rgba(96,165,250,0.24);
  --card-shadow: 0 10px 25px rgba(0,0,0,0.35), 0 4px 10px rgba(0,0,0,0.3);
  --input-bg: #1F2937;
  --input-border: rgba(96,165,250,0.28);
  --input-focus: var(--accent);
  --nav-hover: rgba(96,165,250,0.18);
  --badge-bg: linear-gradient(135deg, rgba(17,24,39,0.85), rgba(31,41,55,0.85));
  --body-bg: var(--bg);
}
*{ box-sizing:border-box; }
html,body{ height:100%; }
body{ margin:0; font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif; background: var(--body-bg); color: var(--text); letter-spacing: 0.2px; line-height: 1.65; font-size: 16px; scroll-behavior: smooth; }
header,footer{ padding:16px 20px; background:transparent; }
#app-footer{ display:flex; justify-content:center; align-items:center; height:60px; color:var(--muted); font-size:14px; position: relative; }
#app-footer::before,#app-footer::after { content: ""; display: none; }
.navbar{ position:sticky; top:0; z-index:10; background:var(--navbar-bg); backdrop-filter:saturate(180%) blur(15px); border-bottom:2px solid var(--navbar-border); padding-left: calc(16px + env(safe-area-inset-left)); padding-right: calc(16px + env(safe-area-inset-right)); box-shadow: 0 4px 20px rgba(255,107,157,0.1); }
.navbar-inner{ display:flex; gap:12px; align-items:center; justify-content:space-between; max-width:1200px; margin:0 auto; padding:12px 16px; }
.brand{ display:flex; align-items:center; gap:12px; font-weight:700; color:var(--text); font-size:18px; transition: transform 0.2s ease; }
.brand:hover { transform: scale(1.05); }
.brand .logo{ width:36px; height:36px; border-radius:12px; background:linear-gradient(135deg,var(--accent),var(--accent-2)); box-shadow:0 4px 12px rgba(255,107,157,0.3), 0 0 0 3px rgba(255,255,255,0.8); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100%{transform:scale(1);} 50%{transform:scale(1.05);} }
@keyframes treeAppear { 0%{transform:scale(0) rotate(-10deg); opacity:0;} 50%{transform:scale(1.2) rotate(5deg); opacity:0.8;} 100%{transform:scale(1) rotate(0deg); opacity:1;} }
.nav{ display:flex; flex-wrap:wrap; gap:8px; }
.nav a{ color:var(--muted); text-decoration:none; padding:10px 16px; border-radius:12px; font-weight:600; font-size:16px; transition: all 0.3s ease; position: relative; overflow: hidden; }
.nav a::before { content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%; background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent); transition: left 0.5s; pointer-events: none; }
.nav a:hover::before { left: 100%; }
.nav a.active,.nav a:hover{ color:var(--text); background:var(--nav-hover); transform: none; box-shadow: none; }
.menu-toggle{ display: none; background: var(--card-bg); border: 2px solid var(--input-border); color: var(--text); padding: 10px 12px; border-radius: 12px; cursor: pointer; font-size: 18px; transition: all 0.3s ease; box-shadow: 0 2px 8px rgba(0,0,0,0.08); }
.menu-toggle:active{ transform: none; }
.theme-toggle{ background: linear-gradient(135deg, var(--accent-3), var(--accent-2)); border: 2px solid rgba(255,255,255,0.3); color: #FFFFFF; padding: 10px 12px; border-radius: 15px; cursor: pointer; font-size: 18px; margin-left: 12px; transition: all 0.3s ease; box-shadow: 0 4px 12px rgba(255,230,109,0.3); position: relative; overflow: hidden; }
.theme-toggle::before { content: ''; position: absolute; top: 50%; left: 50%; width: 0; height: 0; background: rgba(255,255,255,0.3); border-radius: 50%; transition: all 0.3s ease; transform: translate(-50%, -50%); pointer-events: none; }
.theme-toggle:hover { transform: none; box-shadow: none; }
.theme-toggle:hover::before { width: 100px; height: 100px; }
.theme-toggle:active { transform: none; }
.container{ max-width:1200px; margin:0 auto; padding:20px; }
.grid{ display:grid; grid-template-columns:repeat(12,1fr); gap:16px; }
.card{ background: var(--card-bg); border: 2px solid var(--card-border); border-radius: 20px; box-shadow: var(--card-shadow); padding: 24px; transition: all 0.3s ease; position: relative; overflow: hidden; }
.card::before { content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%; background: linear-gradient(45deg, transparent 30%, rgba(255,255,255,0.1) 50%, transparent 70%); transform: rotate(45deg); transition: all 0.6s ease; opacity: 0; pointer-events: none; }
@keyframes shimmer { 0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); } 100% { transform: translateX(100%) translateY(100%) rotate(45deg); } }
.card h2{ margin: 0 0 16px 0; font-size: 24px; color: var(--accent); font-weight: 700; position: relative; }
.card h2::after { content: ''; position: absolute; bottom: -4px; left: 0; width: 40px; height: 3px; background: linear-gradient(90deg, var(--accent), var(--accent-2)); border-radius: 2px; }
.card h3{ margin: 0 0 12px 0; font-size: 20px; color: var(--accent-2); font-weight: 600; }
.card p{ color: var(--text); line-height: 1.7; font-size: 16px; margin-bottom: 12px; }
.controls{ display: flex; flex-wrap: wrap; gap: 16px; margin: 20px 0; align-items: end; }
.input{ display: flex; flex-direction: column; gap: 8px; min-width: 160px; }
.input label { font-weight: 600; color: var(--accent); font-size: 14px; margin-bottom: 4px; }
.input input, .input select, .input button{ padding: 14px 16px; border-radius: 15px; border: 2px solid var(--input-border); background: var(--input-bg); color: var(--text); box-shadow: 0 2px 8px rgba(0,0,0,0.05) inset; font-size: 16px; transition: all 0.3s ease; }
.input input:focus, .input select:focus { outline: none; border-color: var(--input-focus); box-shadow: 0 0 0 3px rgba(255,107,157,0.2), 0 2px 8px rgba(0,0,0,0.05) inset; transform: scale(1.02); }
.input input[type=range]{ accent-color: var(--accent); height: 8px; background: linear-gradient(90deg, var(--accent), var(--accent-2)); border-radius: 10px; }
.btn{ cursor: pointer; border-radius: 15px; padding: 14px 20px; border: 2px solid var(--input-border); background: var(--card-bg); color: var(--text); box-shadow: 0 4px 12px rgba(0,0,0,0.1); font-size: 16px; font-weight: 600; transition: all 0.3s ease; position: relative; overflow: hidden; }
.btn::before { content: ''; position: absolute; top: 50%; left: 50%; width: 0; height: 0; background: rgba(255,255,255,0.3); border-radius: 50%; transition: all 0.3s ease; transform: translate(-50%, -50%); pointer-events: none; }
.btn:hover { transform: none; box-shadow: none; }
.btn:hover::before { width: 300px; height: 300px; }
.btn:active { transform: none; }
.btn.primary{ background: linear-gradient(135deg, var(--accent), var(--accent-2)); border: 0; color: #FFFFFF; box-shadow: 0 6px 20px rgba(255,107,157,0.4); text-shadow: 0 1px 2px rgba(0,0,0,0.2); }
[data-theme="dark"] .btn.primary{ box-shadow: 0 6px 20px rgba(244,114,182,0.4); }
.badge{ display: inline-flex; align-items: center; gap: 8px; padding: 10px 16px; border-radius: 20px; background: var(--badge-bg); color: var(--text); border: 2px solid var(--input-border); font-weight: 600; font-size: 14px; box-shadow: 0 4px 12px rgba(255,107,157,0.1); transition: all 0.3s ease; }
.hero{ display: grid; place-items: center; padding: 60px 0; text-align: center; }
.hero h1{ font-size: 36px; margin: 12px 0; background: linear-gradient(135deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; font-weight: 800; }
.hero p{ color: var(--muted); margin: 0; font-size: 18px; max-width: 600px; }
.mobile-cta{ display: none; }
@media (max-width: 767px){ .mobile-cta{ display: grid; grid-template-columns: 1fr 1fr; gap: 10px; width: 100%; max-width: 520px; margin: 4px auto 12px; } .hero{ padding: 20px 0 40px; } .mobile-cta .btn{ width: 100%; } }
@media (min-width: 768px){ .hero h1{ font-size: 48px; } .container { padding: 24px; } .card { padding: 32px; } .controls { gap: 20px; } }
@media (max-width: 767px){ header, footer{ padding-left: calc(16px + env(safe-area-inset-left)); padding-right: calc(16px + env(safe-area-inset-right)); } #app-footer{ padding-bottom: env(safe-area-inset-bottom); } .navbar-inner { padding: 8px 12px; position: relative; } .brand { font-size: 16px; } .brand .logo { width: 32px; height: 32px; } img, video{ max-width: 100%; height: auto; } .badge, .btn{ word-break: keep-all; overflow-wrap: anywhere; } .menu-toggle{ display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; } .nav{ position: absolute; top: 100%; right: 12px; left: 12px; display: none; flex-direction: column; gap: 8px; background: var(--navbar-bg); border: 2px solid var(--navbar-border); border-radius: 12px; padding: 8px; box-shadow: 0 8px 20px rgba(0,0,0,0.08); } .navbar-inner.is-open .nav{ display: flex; } .nav a{ padding: 12px 14px; font-size: 15px; } .grid{ grid-template-columns: 1fr; } .grid > * { grid-column: 1 / -1 !important; } .hero h1{ font-size: 28px; } .card h2{ font-size: 20px; } .card{ padding: 20px; } .btn, .nav a, .input input, .input select, .input button{ min-height: 44px; } .controls { flex-direction: column; align-items: stretch; } .input { min-width: auto; } #drag-area { height: 250px; margin: 0 -8px; } .draggable-tree { font-size: 20px; touch-action: none; } .card .input { margin-bottom: 12px; } #chat-history { max-height: 200px; font-size: 14px; } .chat-message { max-width: 90%; font-size: 14px; padding: 10px 12px; } #chat-input { font-size: 16px; padding: 12px; } #chat-controls { flex-direction: column; gap: 8px; } #chat-controls .btn { width: 100%; padding: 12px; font-size: 14px; } #drag-area .btn.small { padding: 8px 12px; font-size: 11px; } #status-display { font-size: 11px; padding: 6px 8px; } }
@media (max-width: 374px){ .hero h1{ font-size: 24px; } .card{ padding: 16px; } #drag-area { height: 200px; margin: 0 -4px; } .draggable-tree { font-size: 18px; } #chat-history { max-height: 150px; font-size: 13px; } .chat-message { font-size: 13px; padding: 8px 10px; } #chat-input { font-size: 16px; padding: 10px; } .input label { font-size: 13px; } .input input, .input select { font-size: 14px; padding: 8px; } }
.draggable-tree { transition: transform 0.2s ease, filter 0.2s ease; touch-action: none; }
.draggable-tree:hover { transform: scale(1.05) !important; }
.draggable-tree:active { transform: scale(0.95) !important; }
.chat-message { animation: slideIn 0.3s ease-out; }
@keyframes slideIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
#drag-area { position: relative; transition: background-color 0.3s ease; min-height: 300px; }
#drag-area:hover { background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%); }
.btn.small { padding: 6px 12px; font-size: 12px; border-radius: 6px; }
.input input:focus, .input select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1); }
#chat-history { border: 1px solid var(--border); border-radius: 8px; background: #f8fafc; }
#chat-input { border: 2px solid var(--border); border-radius: 8px; transition: border-color 0.2s ease, box-shadow 0.2s ease; }
#chat-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1); outline: none; }
.fun-decoration::before { content: ""; display: none; }
@keyframes twinkle { from {opacity:1} to {opacity:1} }
.success { color: var(--success) !important; font-weight: 600; }
.success::before { content: "🎉 "; }
.error { color: var(--danger) !important; font-weight: 600; }
.error::before { content: "🤔 "; }