/**
 * Nebula · Knowledge 统一亮色 UI 主题
 * 供 login.php / dashboard.php / admin.php 引用
 */
:root {
  --primary:   #6a5acd;
  --primary-2: #8b7dff;
  --primary-3: #4b3fa8;
  --text:      #1e1f36;
  --text-2:    #4a4d6c;
  --muted:     #8b8fa8;
  --line:      #e6e8f2;
  --line-2:    #eef0f7;
  --bg:        #f5f6fb;
  --panel:     #ffffff;
  --panel-2:   #f8f9fd;
  --green:     #17b26a;
  --green-bg:  #ecfdf3;
  --red:       #d92d20;
  --red-bg:    #fef3f2;
  --blue:      #3a86ff;
  --blue-bg:   #eff6ff;
  --amber:     #f59e0b;
  --amber-bg:  #fffbeb;
  --pink:      #e83e8c;
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(circle at 15% 10%, rgba(106,90,205,.08), transparent 40%),
    radial-gradient(circle at 85% 20%, rgba(58,134,255,.06), transparent 45%),
    radial-gradient(circle at 50% 90%, rgba(232,62,140,.05), transparent 45%);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* -------- 通用按钮 -------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 20px; border-radius: 8px; border: none; cursor: pointer;
  background: linear-gradient(135deg, #8b7dff 0%, #6a5acd 100%);
  color: #fff; font-size: 14px; letter-spacing: .3px; font-weight: 500; text-decoration: none;
  box-shadow: 0 4px 12px rgba(106,90,205,.22);
  transition: all .15s;
  font-family: inherit;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(106,90,205,.32); text-decoration: none; color: #fff; }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: .55; cursor: not-allowed; transform: none; }
.btn.ghost {
  background: #fff; color: var(--text-2);
  border: 1px solid var(--line); box-shadow: none;
}
.btn.ghost:hover { border-color: var(--primary); color: var(--primary); background: #fafaff; }
.btn.sm { padding: 6px 14px; font-size: 12px; }
.btn.danger { background: linear-gradient(135deg, #f97066, #d92d20); box-shadow: 0 4px 12px rgba(217,45,32,.22); }

/* -------- 表单 -------- */
label {
  display: block; margin-bottom: 8px;
  font-size: 12px; color: var(--text-2);
  letter-spacing: .3px; font-weight: 500;
}
input[type=text], input[type=email], input[type=password], input[type=number],
input[type=search], textarea, select {
  width: 100%; padding: 11px 14px; border-radius: 8px;
  border: 1px solid var(--line); background: #fff;
  color: var(--text); font-size: 14px; outline: none;
  transition: all .15s; font-family: inherit;
}
input::placeholder, textarea::placeholder { color: #bfc3d4; }
input:focus, textarea:focus, select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(106,90,205,.12);
}
textarea { min-height: 100px; resize: vertical; line-height: 1.6; }
.field { margin-bottom: 16px; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

/* -------- 徽章 -------- */
.badge {
  display: inline-flex; align-items: center;
  padding: 3px 10px; border-radius: 20px;
  font-size: 11px; font-weight: 600; letter-spacing: .4px;
}
.badge.ok { background: var(--green-bg); color: var(--green); border: 1px solid #b6e9cd; }
.badge.no { background: var(--red-bg);   color: var(--red);   border: 1px solid #fdb4ab; }
.badge.info { background: var(--blue-bg); color: var(--blue); border: 1px solid #bfdbfe; }
.badge.warn { background: var(--amber-bg); color: var(--amber); border: 1px solid #fde68a; }

/* -------- 提示 -------- */
.alert {
  padding: 12px 16px; border-radius: 10px; margin-bottom: 16px;
  font-size: 13px; display: flex; gap: 10px;
  align-items: flex-start; line-height: 1.7;
}
.alert.err { background: var(--red-bg);   border: 1px solid #fdb4ab; color: #7a271a; }
.alert.ok  { background: var(--green-bg); border: 1px solid #b6e9cd; color: #054f31; }
.alert.info{ background: var(--blue-bg);  border: 1px solid #bfdbfe; color: #1e3a8a; }

/* -------- 卡片 -------- */
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(30, 31, 54, .03);
}
.card-title {
  padding: 16px 20px; border-bottom: 1px solid var(--line);
  font-size: 14px; font-weight: 600;
  display: flex; align-items: center; justify-content: space-between;
}
.card-body { padding: 20px; }

/* -------- 表格 -------- */
.tbl { width: 100%; border-collapse: collapse; }
.tbl th, .tbl td { padding: 12px 14px; text-align: left; font-size: 13px; }
.tbl thead th {
  background: var(--panel-2);
  color: var(--muted); font-weight: 600;
  font-size: 11px; letter-spacing: .6px; text-transform: uppercase;
  border-bottom: 1px solid var(--line);
}
.tbl tbody tr { border-bottom: 1px solid var(--line-2); transition: background .15s; }
.tbl tbody tr:hover { background: var(--panel-2); }
.tbl tbody tr:last-child { border-bottom: none; }
.tbl code { background: var(--panel-2); padding: 2px 6px; border-radius: 4px; font-size: 12px; color: var(--primary); font-family: "SFMono-Regular", Consolas, monospace; }

/* -------- 通用 -------- */
code { background: #f0f2fa; padding: 2px 8px; border-radius: 5px; font-size: 13px; color: var(--primary); font-family: "SFMono-Regular", Consolas, monospace; }
.muted { color: var(--muted); }
.hero-empty {
  text-align: center; padding: 60px 20px;
  color: var(--muted); font-size: 14px;
}
.hero-empty .ic {
  font-size: 42px; margin-bottom: 12px; opacity: .5;
}

/* 滚动条 */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: #d0d5e3; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary-2); }
::-webkit-scrollbar-track { background: transparent; }