:root {
  --color-bg: #f4f6f9;
  --color-surface: #ffffff;
  --color-border: #e0e4eb;
  --color-text: #1c2530;
  --color-text-muted: #667085;
  --color-primary: #2f6fed;
  --color-primary-dark: #1f4fc4;
  --color-danger: #d64545;
  --color-danger-dark: #b23636;
  --color-success: #1e8e5a;
  --color-warning: #b7791f;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(16, 24, 40, 0.08), 0 1px 2px rgba(16, 24, 40, 0.06);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 14px;
  line-height: 1.5;
}

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

h1, h2, h3 { margin: 0 0 12px; font-weight: 600; }
h1 { font-size: 22px; }
h2 { font-size: 18px; }
h3 { font-size: 15px; }

p { margin: 0 0 12px; }

/* Layout */
.app-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 20;
}
.app-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand { font-weight: 700; font-size: 16px; color: var(--color-text); }
.main-nav { display: flex; gap: 16px; flex: 1; }
.main-nav a { color: var(--color-text-muted); font-weight: 500; }
.main-nav a:hover { color: var(--color-text); text-decoration: none; }
.header-user { display: flex; align-items: center; gap: 10px; }
.username { font-weight: 600; }
.logout-form { display: inline; }

.app-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

.page-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  gap: 12px;
  flex-wrap: wrap;
}

.section {
  margin-bottom: 32px;
}

/* Card */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn:hover { background: #eef1f5; text-decoration: none; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); }
.btn-secondary { background: var(--color-surface); }
.btn-danger { background: var(--color-danger); border-color: var(--color-danger); color: #fff; }
.btn-danger:hover { background: var(--color-danger-dark); }
.btn-link { background: none; border: none; color: var(--color-primary); padding: 4px 6px; }
.btn-sm { padding: 5px 9px; font-size: 12px; }
.btn-icon { padding: 5px 8px; line-height: 1; }
.actions-cell { display: flex; gap: 6px; flex-wrap: wrap; }

/* Forms */
.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 5px; font-size: 13px; }
.form-group input[type=text],
.form-group input[type=password],
.form-group input[type=number],
.form-group input[type=url],
.form-group input[type=search],
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 13px;
  background: #fff;
  color: var(--color-text);
}
.form-group textarea { resize: vertical; min-height: 70px; }
.form-hint { font-size: 12px; color: var(--color-text-muted); margin-top: 4px; }
.form-row { display: flex; gap: 12px; }
.form-row .form-group { flex: 1; }

/* Alerts */
.alert { padding: 10px 14px; border-radius: 6px; margin-bottom: 16px; font-size: 13px; }
.alert-error { background: #fdecea; color: #7a1f1f; border: 1px solid #f3c1bd; }
.alert-success { background: #e8f7ef; color: #14532d; border: 1px solid #b7e4c7; }
.alert-info { background: #eaf1fd; color: #1a3e8f; border: 1px solid #c2d6f9; }

/* Table */
.table-wrap { overflow-x: auto; }
table.data-table { width: 100%; border-collapse: collapse; background: var(--color-surface); }
table.data-table th, table.data-table td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
  font-size: 13px;
}
table.data-table th { color: var(--color-text-muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
table.data-table tbody tr:hover { background: #f9fafc; }
.empty-row td { text-align: center; color: var(--color-text-muted); padding: 24px; }

/* Badges */
.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .03em; }
.badge-admin { background: #eee4fb; color: #5b21b6; }
.badge-user { background: #e0edfd; color: #1d4ed8; }
.badge-active { background: #e8f7ef; color: #14532d; }
.badge-inactive { background: #f3f4f6; color: #6b7280; }
.badge-view { background: #f3f4f6; color: #374151; }
.badge-edit { background: #fef3e2; color: #92400e; }
.role-badge { padding: 2px 8px; border-radius: 999px; font-size: 11px; font-weight: 700; text-transform: uppercase; background: #eee4fb; color: #5b21b6; }

/* Password cell */
.password-cell { display: flex; align-items: center; gap: 6px; font-family: "SFMono-Regular", Consolas, monospace; }
.password-mask { letter-spacing: 2px; }

/* Chips (shared-with) */
.chip-list { display: flex; flex-wrap: wrap; gap: 4px; }
.chip { background: #eef1f5; border-radius: 999px; padding: 2px 8px; font-size: 11px; display: inline-flex; align-items: center; gap: 4px; }
.chip button { border: none; background: none; cursor: pointer; color: var(--color-text-muted); font-weight: 700; padding: 0; }
.muted { color: var(--color-text-muted); }

/* Modal */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(16, 24, 40, .5);
  display: none; align-items: center; justify-content: center; z-index: 50; padding: 20px;
}
.modal-overlay.open { display: flex; }
.modal {
  background: var(--color-surface); border-radius: var(--radius); box-shadow: var(--shadow);
  width: 100%; max-width: 480px; max-height: 90vh; overflow-y: auto; padding: 20px;
}
.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.modal-close { background: none; border: none; font-size: 18px; cursor: pointer; color: var(--color-text-muted); }
.modal-footer { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }
.modal-error { display: none; }

/* Toasts */
.toast-container { position: fixed; bottom: 20px; right: 20px; display: flex; flex-direction: column; gap: 8px; z-index: 100; }
.toast { background: var(--color-text); color: #fff; padding: 10px 16px; border-radius: 6px; font-size: 13px; box-shadow: var(--shadow); opacity: 0; transform: translateY(6px); transition: opacity .2s, transform .2s; }
.toast.show { opacity: 1; transform: translateY(0); }
.toast.toast-error { background: var(--color-danger); }
.toast.toast-success { background: var(--color-success); }

/* Install / login shared shell */
.install-body, .login-body {
  background: linear-gradient(180deg, #eef2fb, var(--color-bg));
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
}
.install-wrap, .login-wrap { width: 100%; max-width: 460px; padding: 20px; }
.install-card, .login-card { padding: 28px; }
.install-title, .login-title { text-align: center; margin-bottom: 20px; }
.install-steps { display: flex; list-style: none; padding: 0; margin: 0 0 20px; border-bottom: 1px solid var(--color-border); }
.install-steps li { flex: 1; text-align: center; padding: 0 0 10px; font-size: 12px; font-weight: 600; color: var(--color-text-muted); border-bottom: 2px solid transparent; }
.install-steps li.active { color: var(--color-primary); border-color: var(--color-primary); }
.install-steps li.done { color: var(--color-success); }
.install-actions { display: flex; justify-content: space-between; gap: 8px; margin-top: 18px; }
.requirement-list { list-style: none; padding: 0; margin: 0 0 18px; }
.requirement-list li { display: flex; align-items: center; gap: 8px; padding: 6px 0; font-size: 13px; }
.requirement-list li.ok { color: var(--color-success); }
.requirement-list li.fail { color: var(--color-danger); }
.req-icon { font-weight: 700; width: 16px; text-align: center; }

.breadcrumbs { font-size: 13px; color: var(--color-text-muted); margin-bottom: 8px; }
.breadcrumbs a { color: var(--color-text-muted); }

@media (max-width: 720px) {
  .app-header-inner { flex-wrap: wrap; }
  .main-nav { order: 3; width: 100%; }
  .page-head { align-items: flex-start; flex-direction: column; }
  .form-row { flex-direction: column; }
}