:root {
  --bg: #f7f8fb;
  --surface: #ffffff;
  --surface-soft: #f1f5f9;
  --border: #e2e8f0;
  --text: #0f172a;
  --muted: #64748b;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --success: #15803d;
  --danger: #dc2626;
  --warning: #d97706;
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
  --radius: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, "Segoe UI", "PingFang SC", "Hiragino Sans GB", sans-serif;
  color: var(--text);
  background: var(--bg);
}

button, input, select, textarea { font: inherit; }
button { white-space: nowrap; }

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 248px 1fr;
}

.sidebar {
  padding: 20px 16px;
  background: #0f172a;
  color: #e2e8f0;
  display: flex;
  flex-direction: column;
  gap: 18px;
  position: sticky;
  top: 0;
  height: 100vh;
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 4px 4px 14px;
  border-bottom: 1px solid rgba(226, 232, 240, 0.12);
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: #2563eb;
  color: white;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.brand-title { font-size: 16px; font-weight: 700; }
.brand-subtitle { color: #94a3b8; font-size: 12px; }

.nav { display: grid; gap: 14px; }
.nav-group { display: grid; gap: 6px; }
.nav-group-title {
  padding: 0 10px;
  color: #94a3b8;
  font-size: 12px;
  line-height: 22px;
}

.nav button {
  border: 0;
  border-radius: 10px;
  padding: 10px 12px;
  background: transparent;
  color: #cbd5e1;
  text-align: left;
  cursor: pointer;
}

.nav button:hover,
.nav button.active {
  background: rgba(37, 99, 235, 0.18);
  color: white;
}

.sidebar-footer {
  margin-top: auto;
  display: grid;
  gap: 8px;
}

.main {
  min-width: 0;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
}

.topbar h1 { margin: 0; font-size: 26px; line-height: 1.2; }
.topbar p { margin: 4px 0 0; color: var(--muted); }
.topbar-actions { display: flex; gap: 10px; }

.status-bar { min-height: 22px; }
.status-bar .status {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.status.success { color: var(--success); }
.status.error { color: var(--danger); }
.status.info { color: var(--text); }

.content { display: grid; gap: 16px; }
.grid.two { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 14px;
}
.panel-title { margin: 0; font-size: 18px; }
.panel-subtitle { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
.panel-actions { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.panel-body { overflow-x: auto; }

.primary-button,
.secondary-button,
.ghost-button,
.danger-button {
  border-radius: 10px;
  padding: 9px 13px;
  border: 1px solid transparent;
  cursor: pointer;
  line-height: 1.2;
}
.primary-button { background: var(--primary); color: white; }
.primary-button:hover { background: var(--primary-dark); }
.secondary-button,
.ghost-button { background: white; border-color: var(--border); color: var(--text); }
.secondary-button:hover,
.ghost-button:hover { background: var(--surface-soft); }
.danger-button { background: #fee2e2; color: var(--danger); border-color: #fecaca; }
button:disabled { cursor: not-allowed; opacity: 0.45; }

.text-button,
.danger-link {
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--primary);
  cursor: pointer;
}
.danger-link { color: var(--danger); }
.text-button:hover,
.danger-link:hover { text-decoration: underline; }

.table { width: 100%; border-collapse: collapse; min-width: 760px; }
.table th,
.table td {
  padding: 12px 10px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  vertical-align: middle;
}
.table th { color: var(--muted); font-weight: 600; background: #f8fafc; }
.table tr:hover td { background: #f8fafc; }

.toolbar { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.toolbar input { max-width: 320px; }
.toolbar select { max-width: 150px; }
.toolbar input,
.toolbar select,
.form-grid input,
.form-grid select,
.form-grid textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: white;
  color: var(--text);
}

.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.form-grid .full { grid-column: 1 / -1; }
.field { display: flex; flex-direction: column; gap: 6px; font-size: 14px; }
.field span { color: var(--muted); }

.empty { color: var(--muted); padding: 18px; text-align: center; }
.empty.left { text-align: left; }
.small { font-size: 12px; color: var(--muted); }

.action-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.meta { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.tag,
.status-pill {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 3px 8px;
  font-size: 12px;
  border: 1px solid var(--border);
  color: var(--muted);
  background: var(--surface-soft);
}
.status-pill.active { color: var(--success); background: #dcfce7; border-color: #bbf7d0; }
.status-pill.muted { color: var(--muted); }

.card-list { display: grid; gap: 12px; }
.card-item { padding: 14px; background: #f8fafc; border: 1px solid var(--border); border-radius: 12px; }
.card-item h3 { margin: 0; font-size: 16px; }
.card-item p { margin: 6px 0 0; color: var(--muted); font-size: 14px; }

.pagination { display: flex; align-items: center; justify-content: flex-end; gap: 12px; margin-top: 14px; color: var(--muted); font-size: 14px; }

.subnav {
  display: flex;
  gap: 8px;
  padding: 4px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 12px;
  width: max-content;
  max-width: 100%;
  overflow-x: auto;
}
.subnav button {
  border: 0;
  border-radius: 9px;
  padding: 9px 14px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}
.subnav button.active { background: var(--primary); color: white; }

.login-overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(15, 23, 42, 0.42);
  backdrop-filter: blur(10px);
  z-index: 20;
}
.login-overlay.hidden { display: none; }
.login-card {
  width: min(420px, 100%);
  background: white;
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 24px 80px rgba(15, 23, 42, 0.22);
  padding: 24px;
}
.login-intro h2 { margin: 10px 0 8px; font-size: 24px; }
.login-intro p { margin: 0; color: var(--muted); line-height: 1.6; }
.login-form { display: grid; gap: 14px; margin-top: 20px; }
.login-form label { display: grid; gap: 6px; }
.login-form input { padding: 11px 13px; border-radius: 10px; border: 1px solid var(--border); }
.login-hint { margin: 14px 0 0; color: var(--muted); font-size: 13px; }
.eyebrow { display: inline-block; padding: 5px 9px; border-radius: 999px; background: #dbeafe; color: var(--primary); font-size: 12px; }

.dialog-overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(15, 23, 42, 0.44);
  backdrop-filter: blur(8px);
  z-index: 30;
}
.dialog-card {
  width: min(620px, 100%);
  max-height: min(760px, calc(100vh - 48px));
  overflow: auto;
  background: white;
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 24px 80px rgba(15, 23, 42, 0.24);
  padding: 20px;
}
.dialog-header { display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; margin-bottom: 16px; }
.dialog-header h2 { margin: 0; font-size: 20px; }
.dialog-header p { margin: 6px 0 0; color: var(--muted); }
.icon-button { border: 0; width: 32px; height: 32px; border-radius: 9px; background: var(--surface-soft); color: var(--text); cursor: pointer; font-size: 20px; line-height: 1; }
.dialog-actions,
.dialog-footer { display: flex; justify-content: flex-end; gap: 10px; margin-top: 4px; }
.detail-list { display: grid; gap: 10px; margin: 0; }
.detail-list div { padding: 12px; border: 1px solid var(--border); border-radius: 12px; background: #f8fafc; }
.detail-list dt { color: var(--muted); font-size: 12px; margin-bottom: 4px; }
.detail-list dd { margin: 0; }
.confirm-message { padding: 14px; border: 1px solid #fecaca; border-radius: 12px; background: #fef2f2; color: #991b1b; line-height: 1.6; }

@media (max-width: 1080px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; }
  .grid.two,
  .form-grid { grid-template-columns: 1fr; }
  .topbar { align-items: flex-start; flex-direction: column; }
}