:root {
  --primary: #00897B;
  --primary-light: #26A69A;
  --primary-soft: #E0F2F1;
  --bg: #0D1B1A;
  --surface: #132A27;
  --card: #162F2B;
  --border: #234038;
  --text: #E6F4F1;
  --text-muted: #9BB8B2;
  --danger: #E57373;
  --warn: #FFB74D;
  --ok: #66BB6A;
  --radius: 12px;
  --shadow: 0 4px 16px rgba(0,0,0,.35);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

/* ── 登录页 ── */
.auth-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.auth-card {
  width: 100%;
  max-width: 380px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  box-shadow: var(--shadow);
}
.auth-card h1 {
  font-size: 22px;
  margin-bottom: 6px;
}
.auth-sub {
  color: var(--text-muted);
  font-size: 13px;
  margin-bottom: 24px;
}
.field { margin-bottom: 16px; }
.field label {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 6px;
}
.field input {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 14px;
  outline: none;
}
.field input:focus { border-color: var(--primary); }
.captcha-row { display: flex; gap: 10px; align-items: center; }
.captcha-row input { flex: 1; }
.captcha-img {
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  background: #fff;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity .15s;
}
.btn:hover { opacity: .88; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: #fff; width: 100%; }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-ghost { background: transparent; color: var(--primary-light); border: 1px solid var(--primary); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-ok { background: var(--ok); color: #fff; }

.err-box {
  background: rgba(229,115,115,.12);
  border: 1px solid var(--danger);
  color: var(--danger);
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 16px;
  display: none;
}

/* ── 主布局 ── */
.shell { display: flex; min-height: 100vh; }
.sidebar {
  width: 200px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 20px 12px;
  flex-shrink: 0;
}
.brand {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary-light);
  padding: 0 8px 20px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}
.nav-item {
  padding: 10px 12px;
  border-radius: 8px;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 4px;
  transition: background .15s;
}
.nav-item:hover { background: var(--card); }
.nav-item.active { background: var(--primary); color: #fff; }
.sidebar-foot {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.admin-name { font-size: 13px; color: var(--text-muted); margin-bottom: 10px; }
.logout-btn { width: 100%; }

.main { flex: 1; padding: 24px; overflow-x: hidden; }
.page-title { font-size: 20px; margin-bottom: 20px; }

/* ── 工具条 ── */
.toolbar {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.toolbar input[type="text"],
.toolbar select {
  padding: 8px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 14px;
  outline: none;
}
.toolbar input:focus, .toolbar select:focus { border-color: var(--primary); }
.toolbar .spacer { flex: 1; }

/* ── 表格 ── */
.table-wrap { overflow-x: auto; background: var(--surface); border-radius: var(--radius); border: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 12px 14px; text-align: left; white-space: nowrap; }
th { color: var(--text-muted); font-weight: 600; border-bottom: 1px solid var(--border); background: var(--card); }
tbody tr { border-bottom: 1px solid var(--border); }
tbody tr:hover { background: var(--card); }
tbody tr:last-child { border-bottom: none; }

/* ── 徽章/状态 ── */
.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}
.badge.active { background: rgba(102,187,106,.15); color: var(--ok); }
.badge.disabled, .badge.cancelled { background: rgba(229,115,115,.15); color: var(--danger); }
.badge.expired { background: rgba(255,183,77,.15); color: var(--warn); }

/* ── 分页 ── */
.pager {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-top: 16px;
  color: var(--text-muted);
  font-size: 13px;
}

/* ── 弹窗 ── */
.modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
}
.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  width: 100%;
  max-width: 460px;
  padding: 24px;
  box-shadow: var(--shadow);
}
.modal h3 { margin-bottom: 18px; font-size: 17px; }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; }
.plan-level-row {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 8px;
}
.plan-level-row select { flex: 1; padding: 8px; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; color: var(--text); }
.plan-level-row input[type="number"] { width: 90px; padding: 8px; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; color: var(--text); }

/* ── 通用 ── */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 18px;
  font-size: 14px;
  box-shadow: var(--shadow);
  z-index: 200;
  opacity: 0;
  transform: translateY(10px);
  transition: all .25s;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.ok { border-color: var(--ok); }
.toast.err { border-color: var(--danger); }
.muted { color: var(--text-muted); }
.empty { text-align: center; padding: 40px; color: var(--text-muted); }

@media (max-width: 640px) {
  .shell { flex-direction: column; }
  .sidebar { width: 100%; flex-direction: row; align-items: center; padding: 12px; }
  .brand { border-bottom: none; padding: 0 12px 0 0; margin-bottom: 0; border-right: 1px solid var(--border); }
  .nav-item { margin-bottom: 0; }
  .sidebar-foot { margin-top: 0; margin-left: auto; border-top: none; }
}