:root {
  color-scheme: light;
  --bg: #f4f5f7;
  --sidebar: #17191e;
  --sidebar-text: #f5f5f4;
  --sidebar-muted: #a8a29e;
  --card: #fff;
  --ink: #1c1917;
  --muted: #57534e;
  --line: #e7e5e4;
  --accent: #0f766e;
  --accent-soft: #ccfbf1;
  --danger: #b91c1c;
  --ok: #047857;
  --warn: #b45309;
  --info: #1d4ed8;
  --shadow: 0 1px 2px rgba(28, 25, 23, 0.05), 0 10px 28px rgba(28, 25, 23, 0.05);
  --radius: 14px;
  --sidebar-w: 232px;
  --font: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font: 15px/1.5 var(--font);
  color: var(--ink);
  background: var(--bg);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

code, .mono { font-family: var(--mono); font-size: 0.86em; }

.shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  background: var(--sidebar);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  padding: 18px 12px 16px;
  position: sticky;
  top: 0;
  height: 100vh;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 8px 16px;
}

.mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: #f5f5f4;
  color: #17191e;
  font-weight: 700;
}

.brand strong { display: block; font-size: 0.98rem; }
.brand small { color: var(--sidebar-muted); }

.nav-toggle { position: absolute; opacity: 0; pointer-events: none; }
.menu {
  display: none;
  margin-left: auto;
  border: 1px solid #44403c;
  color: var(--sidebar-text);
  border-radius: 8px;
  padding: 4px 8px;
  font-size: 0.82rem;
  cursor: pointer;
}

.nav { display: flex; flex-direction: column; gap: 4px; }
.nav a {
  color: var(--sidebar-text);
  text-decoration: none;
  padding: 9px 12px;
  border-radius: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.nav a:hover { background: rgba(255, 255, 255, 0.06); }
.nav a.active { background: #fff; color: #17191e; font-weight: 650; }
.nav .hint { color: var(--sidebar-muted); font-size: 0.75rem; }
.nav a.active .hint { color: #78716c; }

.logout { margin-top: auto; padding: 12px 8px 0; }
.logout button {
  width: 100%;
  background: transparent;
  color: var(--sidebar-text);
  border: 1px solid #44403c;
}

.content {
  padding: 28px 28px 48px;
  max-width: 1180px;
}

.top { margin-bottom: 18px; }
.top h1 { margin: 0; font-size: 1.55rem; letter-spacing: -0.02em; }
.top p { margin: 6px 0 0; }

.muted { color: var(--muted); }
.notice, .error {
  border-radius: 12px;
  padding: 10px 12px;
  margin: 0 0 16px;
}
.notice { background: #ecfdf5; color: #065f46; }
.error { background: #fef2f2; color: #991b1b; }

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}
.stat {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px 16px;
}
.stat span { color: var(--muted); font-size: 0.85rem; }
.stat strong { display: block; font-size: 1.7rem; margin-top: 2px; letter-spacing: -0.03em; }

.card, .table-card, form.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  margin-bottom: 16px;
}
.card h2, form.card h2 { margin: 0 0 12px; font-size: 1.02rem; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td {
  text-align: left;
  padding: 10px 8px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th { font-size: 0.78rem; letter-spacing: 0.03em; color: var(--muted); font-weight: 650; }
tr:last-child td { border-bottom: 0; }

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

label { display: grid; gap: 4px; font-size: 0.88rem; color: var(--muted); }
input, select, textarea, button { font: inherit; color: var(--ink); }
input, select, textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid #d6d3d1;
  border-radius: 10px;
  background: #fff;
}
input[type="checkbox"] { width: auto; justify-self: start; }
textarea { min-height: 88px; resize: vertical; }
button, .button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--ink);
  color: #fff;
  border: 0;
  border-radius: 10px;
  padding: 8px 14px;
  cursor: pointer;
  text-decoration: none;
}
button.ghost, a.ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid #d6d3d1;
}
button.danger { background: transparent; color: var(--danger); border: 1px solid #fecaca; }
button:disabled { opacity: 0.5; cursor: not-allowed; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.inline { display: inline; }
.stack { display: grid; gap: 10px; }

.pill {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 2px 8px;
  font-size: 0.78rem;
  background: #f5f5f4;
  color: #44403c;
  white-space: nowrap;
}
.pill.ok { background: #d1fae5; color: var(--ok); }
.pill.warn { background: #fef3c7; color: var(--warn); }
.pill.bad { background: #fee2e2; color: var(--danger); }
.pill.info { background: #dbeafe; color: var(--info); }

.token {
  font-family: var(--mono);
  font-size: 0.95rem;
  word-break: break-all;
  background: #fafaf9;
  border: 1px dashed #d6d3d1;
  border-radius: 12px;
  padding: 12px;
}

.editor-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 16px; align-items: start; }
textarea.code { min-height: 320px; font-family: var(--mono); font-size: 13px; line-height: 1.45; }
.preview-wrap { background: #e7e5e4; border-radius: 12px; padding: 12px; }
.preview-wrap svg { width: 100%; height: auto; background: #fff; border-radius: 4px; display: block; }
#preview-error:not([hidden]) { display: block; }

.login-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.login {
  width: min(420px, 100%);
  background: var(--card);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 28px 24px;
}
.login h1 { margin: 0 0 8px; }
.login form { display: grid; gap: 12px; margin-top: 16px; }

.empty {
  padding: 8px 0 4px;
}

@media (max-width: 960px) {
  .stats, .grid-2 { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar { position: sticky; height: auto; z-index: 4; }
  .menu { display: inline-flex; }
  .nav { display: none; padding-bottom: 8px; }
  .nav-toggle:checked + .nav { display: flex; }
  .logout { margin-top: 0; }
  .content { padding: 18px 14px 36px; }
  .stats, .grid-2, .editor-grid { grid-template-columns: 1fr; }
}