/* ============================================================
   公共设计系统
   ============================================================ */
:root{
  --bg:#eef1f6;
  --bg-canvas:#f4f6fa;
  --surface:#ffffff;
  --surface-2:#f7f9fc;
  --border:#e4e9f0;
  --border-strong:#d3dbe6;
  --text:#1f2733;
  --text-2:#6b7684;
  --text-3:#98a2b3;
  --accent:#4f6ef7;
  --accent-2:#3b57e6;
  --accent-soft:#eef1ff;
  --green:#16a97a;
  --green-soft:#e6f7f1;
  --amber:#f5a524;
  --amber-soft:#fff4e2;
  --red:#ef4444;
  --red-soft:#fdecec;
  --radius:12px;
  --radius-sm:8px;
  --shadow-sm:0 1px 2px rgba(16,24,40,.06);
  --shadow:0 2px 6px rgba(16,24,40,.08), 0 8px 24px rgba(16,24,40,.10);
  --shadow-lg:0 12px 40px rgba(16,24,40,.20);
  --font:-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;height:100%;}
body{
  font-family:var(--font);
  color:var(--text);
  background:var(--bg);
  font-size:14px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:var(--accent);text-decoration:none;}
a:hover{text-decoration:underline;}
button{font-family:inherit;}
input,select,textarea{font-family:inherit;font-size:14px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:7px 13px;border:1px solid var(--border);border-radius:var(--radius-sm);
  background:var(--surface);color:var(--text);font-size:13px;font-weight:500;
  cursor:pointer;transition:all .15s ease;white-space:nowrap;line-height:1.2;
  user-select:none;
}
.btn:hover{background:var(--surface-2);border-color:var(--border-strong);}
.btn:active{transform:translateY(1px);}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none;}
.btn svg{width:15px;height:15px;flex:none;}
.btn-primary{background:var(--accent);border-color:var(--accent);color:#fff;}
.btn-primary:hover{background:var(--accent-2);border-color:var(--accent-2);}
.btn-ghost{background:transparent;border-color:transparent;color:var(--text-2);}
.btn-ghost:hover{background:var(--surface-2);color:var(--text);}
.btn-danger{background:transparent;border-color:transparent;color:var(--red);}
.btn-danger:hover{background:var(--red-soft);}
.btn-danger-solid{background:var(--red);border-color:var(--red);color:#fff;}
.btn-danger-solid:hover{background:#dc2626;border-color:#dc2626;}
.btn-sm{padding:5px 9px;font-size:12px;border-radius:7px;}
.btn-icon{padding:7px;width:32px;height:32px;}
.btn-block{width:100%;}

/* ---------- 表单 ---------- */
.field{display:flex;flex-direction:column;gap:6px;}
.field label{font-size:12.5px;font-weight:600;color:var(--text-2);}
.input{
  padding:9px 12px;border:1px solid var(--border);border-radius:var(--radius-sm);
  background:var(--surface);color:var(--text);font-size:14px;transition:border .15s, box-shadow .15s;
  width:100%;
}
.input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft);}
.input::placeholder{color:var(--text-3);}
select.input{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2398a2b3' stroke-width='2.5'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:32px;}

/* ---------- 徽章 ---------- */
.badge{display:inline-flex;align-items:center;gap:4px;padding:2px 8px;border-radius:20px;font-size:11px;font-weight:600;line-height:1.5;}
.badge-admin{background:var(--accent-soft);color:var(--accent-2);}
.badge-user{background:var(--surface-2);color:var(--text-2);border:1px solid var(--border);}

/* ---------- 分隔线 / 工具条 ---------- */
.divider-v{width:1px;height:22px;background:var(--border);margin:0 4px;flex:none;}

/* ---------- 提示 toast ---------- */
#toast-root{position:fixed;left:50%;bottom:28px;transform:translateX(-50%);z-index:10000;display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none;}
.toast{
  display:flex;align-items:center;gap:8px;
  background:#1f2733;color:#fff;padding:10px 16px;border-radius:10px;
  font-size:13px;font-weight:500;box-shadow:var(--shadow-lg);
  opacity:0;transform:translateY(10px);transition:opacity .2s, transform .2s;max-width:80vw;
}
.toast.show{opacity:1;transform:translateY(0);}
.toast.success{background:#0f7a55;}
.toast.error{background:#c03030;}
.toast .dot{width:7px;height:7px;border-radius:50%;background:currentColor;flex:none;}

/* ---------- 模态 ---------- */
.overlay{pointer-events:none;
  position:fixed;inset:0;background:rgba(15,23,42,.45);backdrop-filter:blur(2px);
  z-index:9000;display:flex;align-items:center;justify-content:center;padding:24px;
  opacity:0;transition:opacity .18s;
}
.overlay.show{opacity:1;pointer-events:auto;}
.modal{
  background:var(--surface);border-radius:16px;box-shadow:var(--shadow-lg);
  width:100%;display:flex;flex-direction:column;overflow:hidden;
  transform:translateY(8px) scale(.99);transition:transform .18s;
}
.overlay.show .modal{transform:translateY(0) scale(1);}
.modal-head{display:flex;align-items:center;gap:12px;padding:16px 20px;border-bottom:1px solid var(--border);}
.modal-title{font-size:16px;font-weight:700;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.modal-body{padding:20px;overflow:auto;}
.modal-foot{display:flex;align-items:center;gap:10px;padding:14px 20px;border-top:1px solid var(--border);background:var(--surface-2);}
.icon-btn{
  width:30px;height:30px;display:inline-flex;align-items:center;justify-content:center;
  border:none;background:transparent;border-radius:8px;color:var(--text-2);cursor:pointer;transition:all .15s;
}
.icon-btn:hover{background:var(--surface-2);color:var(--text);}
.icon-btn svg{width:17px;height:17px;}

/* ---------- 工具提示 ---------- */
[title]{cursor:inherit;}

/* ---------- 滚动条 ---------- */
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-thumb{background:#cdd5e1;border-radius:10px;border:2px solid transparent;background-clip:content-box;}
::-webkit-scrollbar-thumb:hover{background:#b4bfce;background-clip:content-box;}
::-webkit-scrollbar-track{background:transparent;}

/* ---------- 空状态 ---------- */
.empty{display:flex;flex-direction:column;align-items:center;gap:10px;color:var(--text-3);padding:30px 0;text-align:center;}
.empty svg{width:34px;height:34px;opacity:.6;}