:root {
  color-scheme: dark;
  --bg: #0f1319;
  --panel: #171d26;
  --panel-2: #1e2631;
  --border: #2b3543;
  --text: #e6ebf2;
  --muted: #93a1b3;
  --accent: #4f9cff;
  --accent-2: #2f7ae0;
  --danger: #ff6b6b;
  --ok: #43c98a;
  --warn: #f0b45a;
  --radius: 10px;
  font-family: "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
}

* { box-sizing: border-box; }

/* 作者样式的 display 会覆盖浏览器对 hidden 的默认 display:none；
   登录页的 .login-wrap 尤其明显，必须强制隐藏，否则登录成功后卡片仍盖在应用界面上。 */
[hidden] { display: none !important; }

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(1200px 600px at 20% -10%, #1b2a3d 0%, var(--bg) 60%);
  color: var(--text);
  font-size: 14px;
}

a { color: var(--accent); }

h1, h2, h3 { margin: 0 0 12px; font-weight: 600; }
h1 { font-size: 20px; }
h2 { font-size: 16px; }
h3 { font-size: 14px; color: var(--muted); font-weight: 600; }

.login-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-card {
  width: min(380px, 100%);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, .45);
}

.login-card p.hint { color: var(--muted); margin: 0 0 20px; line-height: 1.6; }

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}

.brand-mark {
  width: 34px; height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), #6de3c2);
  display: grid; place-items: center;
  font-weight: 700; color: #08111c;
}

.brand small { display: block; color: var(--muted); font-size: 11px; letter-spacing: .08em; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 22px;
  border-bottom: 1px solid var(--border);
  background: rgba(15, 19, 25, .75);
  backdrop-filter: blur(12px);
  position: sticky; top: 0; z-index: 20;
}

.topbar .who { color: var(--muted); font-size: 12px; }

.layout { display: grid; grid-template-columns: 200px minmax(0, 1fr); min-height: calc(100vh - 62px); }

.sidebar {
  border-right: 1px solid var(--border);
  padding: 14px 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.tab-btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  text-align: left;
  padding: 10px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
}

.tab-btn:hover { background: var(--panel-2); color: var(--text); }
.tab-btn.active { background: var(--accent-2); color: #fff; }

.content { padding: 22px; overflow-x: auto; }

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 18px;
}

.grid { display: grid; gap: 12px; }
.grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

label.field { display: flex; flex-direction: column; gap: 6px; color: var(--muted); font-size: 12px; }

input, select, textarea {
  width: 100%;
  background: #0c1118;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 10px;
  font: inherit;
}

input:focus, select:focus, textarea:focus { outline: 2px solid rgba(79, 156, 255, .35); border-color: var(--accent); }

textarea { min-height: 76px; resize: vertical; }

button {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 8px;
  background: var(--accent-2);
  color: #fff;
  padding: 9px 14px;
  font: inherit;
  cursor: pointer;
}

button:hover { background: var(--accent); }
button.secondary { background: transparent; border-color: var(--border); color: var(--text); }
button.secondary:hover { background: var(--panel-2); }
button.danger { background: #8f2c2c; }
button.danger:hover { background: var(--danger); color: #1a0505; }
button.small { padding: 5px 9px; font-size: 12px; }
button:disabled { opacity: .55; cursor: not-allowed; }

.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.spacer { flex: 1; }
.w-220 { width: 220px; }
.w-140 { width: 140px; }
.w-170 { width: 170px; }
.mt-12 { margin-top: 12px; }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 12px; white-space: nowrap; }
tbody tr:hover { background: rgba(255, 255, 255, .025); }

code, .mono { font-family: "Cascadia Mono", Consolas, monospace; font-size: 12px; word-break: break-all; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 11px; border: 1px solid var(--border); color: var(--muted); }
.badge.ok { color: var(--ok); border-color: rgba(67, 201, 138, .45); }
.badge.warn { color: var(--warn); border-color: rgba(240, 180, 90, .45); }
.badge.danger { color: var(--danger); border-color: rgba(255, 107, 107, .45); }

.muted { color: var(--muted); }
.error { color: var(--danger); min-height: 18px; font-size: 12px; }
.success { color: var(--ok); font-size: 12px; }

.empty { color: var(--muted); padding: 18px 4px; text-align: center; }

.modal {
  position: fixed; inset: 0; z-index: 60;
  background: rgba(0, 0, 0, .72);
  display: grid; place-items: center;
  padding: 24px;
}
.modal[hidden] { display: none; }
.modal-box {
  width: min(1100px, 96vw);
  max-height: 92vh;
  overflow: auto;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}
.modal-box img { max-width: 100%; display: block; border-radius: 8px; background: #000; }

pre.json {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-all;
  background: #0c1118;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
  font-size: 12px;
  max-height: 300px;
  overflow: auto;
}

.toast {
  position: fixed; right: 20px; bottom: 20px; z-index: 80;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  padding: 10px 14px;
  max-width: 420px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, .5);
}
.toast[hidden] { display: none; }
.toast.error { border-left-color: var(--danger); }

.cards-issued { display: grid; gap: 6px; margin-top: 12px; }

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { flex-direction: row; overflow-x: auto; border-right: 0; border-bottom: 1px solid var(--border); }
  .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr; }
  .content { padding: 14px; }
}