/* ── 字符解码器 · 样式 ── */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
body{
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  font-size:14px;line-height:1.6;color:var(--text-primary);
  background-color:var(--bg-body);
  background-image:var(--bg-pattern,radial-gradient(circle,var(--border) 1px,transparent 1px));
  background-size:var(--bg-pattern-size,18px 18px);min-height:100vh;padding:20px;
}
body[data-theme="3"]{background-image:linear-gradient(135deg,#e8f0fe,#f3e8ff,#fce7f3,#e0f2fe)}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}

/* ── 布局 ── */
.app-layout{display:flex;min-height:100vh}
.sidebar{
  width:260px;min-width:260px;position:fixed;top:0;left:0;bottom:0;
  background:var(--bg-panel);border-right:1px solid var(--border);
  padding:20px 14px;display:flex;flex-direction:column;
  z-index:100;overflow-y:auto;
}
.sidebar-brand{font-family:Georgia,'Times New Roman',serif;font-size:1rem;font-weight:bold;color:var(--text-primary);text-decoration:none;margin-bottom:16px;display:flex;align-items:center;gap:8px}
.sidebar-nav{list-style:none;flex:1}
.sidebar-nav li{margin-bottom:2px}
.sidebar-nav a{display:flex;align-items:center;gap:8px;padding:6px 10px;border-radius:2px;color:var(--text-secondary);text-decoration:none;font-size:.8rem;transition:all .15s}
.sidebar-nav a:hover{background:var(--button-bg);color:var(--text-primary)}
.sidebar-nav a.active{background:var(--button-bg);color:var(--accent);font-weight:600}
.sidebar-divider{height:1px;background:var(--border);margin:16px 0}
.main-content{margin-left:260px;flex:1;padding:20px 24px}

/* ── 导航 ── */
.navbar{
  background:var(--bg-panel);border:1px solid var(--border);
  padding:10px 20px;display:flex;flex-wrap:wrap;align-items:center;
  justify-content:space-between;gap:10px;border-radius:2px;margin-bottom:16px;
}
.navbar-brand{font-family:Georgia,'Times New Roman',serif;font-size:1.05rem;font-weight:bold;color:var(--text-primary);text-decoration:none;white-space:nowrap}
.navbar-links{display:flex;flex-wrap:wrap;gap:2px;list-style:none}
.navbar-links a{display:inline-block;padding:6px 12px;border-radius:2px;color:var(--text-secondary);text-decoration:none;font-size:.82rem;font-weight:500}
.navbar-links a:hover{background:var(--button-bg);color:var(--text-primary)}
.navbar-links a.active{color:var(--accent);background:var(--button-bg)}
.navbar-controls{display:flex;align-items:center;gap:8px;flex-wrap:wrap}

/* ── 主题按钮 ── */
.theme-toggle{background:var(--button-bg);border:1px solid var(--border);color:var(--text-primary);border-radius:2px;width:36px;height:36px;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:1rem}
.theme-toggle:hover{background:var(--button-hover)}

/* ── 面板 ── */
.panel{background:var(--bg-panel);border:1px solid var(--border);border-radius:2px;padding:20px;margin-bottom:16px}
.panel-header{font-family:Georgia,'Times New Roman',serif;font-size:.95rem;font-weight:bold;color:var(--text-primary);margin-bottom:12px;padding-bottom:8px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:6px}

/* ── 网格 ── */
.main-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}

/* ── 输入控件 ── */
textarea,input[type="text"],input[type="number"],input[type="search"],select{
  background:var(--bg-body);color:var(--text-primary);border:1px solid var(--border);
  border-radius:2px;padding:10px 12px;font-family:'Courier New',Courier,monospace;
  font-size:.88rem;width:100%;outline:none;
}
textarea:focus,input:focus,select:focus{border-color:var(--accent);background:var(--bg-panel)}
textarea{resize:vertical;min-height:100px}.textarea-large{min-height:200px}

/* ── 按钮 ── */
.btn{background:var(--button-bg);color:var(--text-primary);border:1px solid var(--border);border-radius:2px;padding:6px 14px;font-size:.82rem;font-family:inherit;cursor:pointer;display:inline-flex;align-items:center;gap:5px;white-space:nowrap;box-shadow:inset 0 -2px 0 rgba(0,0,0,0.06);text-decoration:none}
.btn:hover{background:var(--button-hover)}
.btn:active{transform:translateY(1px);box-shadow:inset 0 -1px 0 rgba(0,0,0,0.06)}
.btn-primary{background:var(--accent);color:#fff;border:1px solid var(--accent)}
.btn-primary:hover{background:var(--accent-hover)}
.btn-sm{padding:4px 10px;font-size:.76rem}
.btn-group{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}

/* ── Tab ── */
.tab-container{display:flex;border-bottom:1px solid var(--border);gap:0;margin-bottom:14px;overflow-x:auto}
.tab-btn{padding:8px 16px;background:transparent;border:1px solid transparent;border-bottom:none;font-size:.84rem;font-weight:500;color:var(--text-secondary);cursor:pointer;border-radius:2px 2px 0 0;font-family:inherit;white-space:nowrap;flex-shrink:0}
.tab-btn:hover{background:var(--button-bg);color:var(--text-primary)}
.tab-btn.active{color:var(--accent);border:1px solid var(--border);border-bottom:1px solid var(--bg-panel);background:var(--bg-panel);margin-bottom:-1px}
.tab-panel{display:none}
.tab-panel.active{display:block}

.tab-content{display:none}.tab-content.active{display:block}
/* ── 结果区 ── */
.output-area{background:var(--bg-body);border:1px solid var(--border);border-radius:2px;padding:14px;min-height:80px;max-height:400px;overflow:auto;font-family:'Courier New',Courier,monospace;font-size:.84rem;white-space:pre-wrap;word-break:break-all;line-height:1.5;color:var(--text-primary)}

/* ── 字符卡片 ── */
.char-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px}
.char-card{background:var(--bg-body);border:1px solid var(--border);border-radius:2px;padding:12px;font-family:'Courier New',Courier,monospace;font-size:.82rem}
.char-card .char-display{font-size:3rem;text-align:center;padding:10px 0;border-bottom:1px solid var(--border);margin-bottom:8px}
.char-card .char-info{display:grid;grid-template-columns:auto 1fr;gap:4px 8px}
.char-card .char-label{color:var(--text-secondary);font-size:.72rem}
.char-card .char-value{color:var(--text-primary);font-size:.78rem;word-break:break-all}

/* ── 信息表格 ── */
.info-table{width:100%;border-collapse:collapse;font-size:.82rem;margin-top:6px}
.info-table th{background:var(--button-bg);color:var(--text-primary);padding:8px 10px;text-align:left;font-weight:600;border-bottom:2px solid var(--border)}
.info-table td{padding:6px 10px;border-bottom:1px solid var(--border);color:var(--text-secondary)}
.info-table tr:hover td{background:var(--button-hover)}
.info-table .mono{font-family:'Courier New',Courier,monospace;font-size:.8rem}

/* ── 分段表格 ── */
.segment-table{width:100%;border-collapse:collapse;font-size:.8rem;margin-top:8px}
.segment-table th{background:var(--button-bg);color:var(--text-primary);padding:6px 8px;text-align:center;font-weight:600;border-bottom:2px solid var(--border);font-size:.74rem}
.segment-table td{padding:5px 8px;text-align:center;border-bottom:1px solid var(--border);font-family:'Courier New',Courier,monospace}
.segment-table td.orig{font-size:1.2rem;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif}
.segment-table tr:hover td{background:var(--button-hover)}

/* ── 复制按钮 ── */
.copy-btn{background:none;border:none;color:var(--accent);cursor:pointer;font-size:.8rem;padding:2px 6px;border-radius:2px;opacity:.7}
.copy-btn:hover{opacity:1;background:var(--button-bg)}

/* ── 响应式 ── */
@media(max-width:768px){
  body{padding:10px}
  .main-grid{grid-template-columns:1fr}
  .sidebar{width:240px;min-width:240px;padding:14px 10px}
  .sidebar-nav a{font-size:.74rem;padding:5px 8px}
  .main-content{margin-left:240px;padding:16px 14px}
  .char-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}
}
@media(max-width:560px){
  .sidebar{position:relative;width:100%;min-width:100%;max-height:130px;flex-direction:row;flex-wrap:wrap;align-items:center;gap:6px;padding:8px 12px;border-right:none;border-bottom:1px solid var(--border)}
  .sidebar-brand{margin-bottom:0;font-size:.9rem}
  .sidebar-nav{display:flex;flex-wrap:wrap;gap:2px;flex:none}
  .sidebar-nav li{margin:0}
  .sidebar-nav a{padding:3px 6px;font-size:.7rem}
  .sidebar-divider{display:none}
  .app-layout{flex-direction:column}
  .main-content{margin-left:0;padding:12px}
}