/* ---------------------------------------------------------------
   Design tokens — premium, modern palette (not the old app's
   default Bootstrap blue-and-grey look).
--------------------------------------------------------------- */
:root {
  --color-bg: #f6f7f9;
  --color-surface: #ffffff;
  --color-surface-muted: #f1f2f5;
  --color-border: #e5e7eb;
  --color-text: #1a1d23;
  --color-text-muted: #6b7280;
  --color-text-faint: #9aa0ab;

  --color-primary: #4f46e5;
  --color-primary-hover: #4338ca;
  --color-primary-soft: #eef2ff;
  --color-success: #16a34a;
  --color-success-soft: #ecfdf3;
  --color-danger: #dc2626;
  --color-danger-soft: #fef2f2;
  --color-warning: #d97706;
  --color-warning-soft: #fffbeb;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.05);
  --shadow-md: 0 4px 12px rgba(16, 24, 40, 0.08);
  --shadow-lg: 0 12px 32px rgba(16, 24, 40, 0.12);

  --font-sans: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  --sidebar-width: 248px;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 14.5px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  margin: 0;
}

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

/* ---------------------------------------------------------------
   App shell: fixed sidebar + top bar + content
--------------------------------------------------------------- */
.app-shell {
  display: flex;
  min-height: 100vh;
}

.app-sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  padding: 20px 14px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.app-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 10px 22px;
  font-weight: 700;
  font-size: 16px;
  color: var(--color-text);
}

.app-brand-mark {
  width: 30px;
  height: 30px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--color-primary), #7c3aed);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 14px;
}

.nav-section-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin: 18px 10px 6px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: 14px;
  margin-bottom: 2px;
  transition: background 0.12s ease, color 0.12s ease;
}

.nav-link:hover {
  background: var(--color-surface-muted);
  color: var(--color-text);
}

.nav-link.active {
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-weight: 600;
}

.app-main {
  flex: 1;
  min-width: 0;
}

.app-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 28px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.app-topbar h1 {
  font-size: 18px;
  font-weight: 700;
  margin: 0;
}

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

/* ---------------------------------------------------------------
   Cards, buttons, forms
--------------------------------------------------------------- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 22px;
}

.card + .card { margin-top: 18px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 9px 16px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.12s ease, border-color 0.12s ease, box-shadow 0.12s ease;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover { background: var(--color-primary-hover); color: #fff; }

.btn-secondary {
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text);
}
.btn-secondary:hover { background: var(--color-surface-muted); }

.btn-danger {
  background: var(--color-danger-soft);
  color: var(--color-danger);
}
.btn-danger:hover { background: #fde2e2; }

.btn-sm { padding: 6px 12px; font-size: 13px; }

.form-label {
  display: block;
  font-weight: 600;
  font-size: 13px;
  margin-bottom: 6px;
  color: var(--color-text);
}

.form-control, .form-select {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color 0.12s ease, box-shadow 0.12s ease;
}

.form-control:focus, .form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}

.form-group { margin-bottom: 16px; }

.text-danger { color: var(--color-danger); font-size: 13px; }
.text-muted { color: var(--color-text-muted); }

.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}
.badge-success { background: var(--color-success-soft); color: var(--color-success); }
.badge-warning { background: var(--color-warning-soft); color: var(--color-warning); }
.badge-muted { background: var(--color-surface-muted); color: var(--color-text-muted); }

.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th {
  text-align: left;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 10px 12px;
  border-bottom: 1px solid var(--color-border);
}

.data-table td {
  padding: 12px;
  border-bottom: 1px solid var(--color-border);
  font-size: 14px;
}

.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--color-surface-muted); }

.alert {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 14px;
  margin-bottom: 18px;
}
.alert-danger { background: var(--color-danger-soft); color: var(--color-danger); }
.alert-success { background: var(--color-success-soft); color: var(--color-success); }
.alert-warning { background: var(--color-warning-soft); color: var(--color-warning); }

/* ---------------------------------------------------------------
   Auth screens (login / change password)
--------------------------------------------------------------- */
.auth-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at top left, #eef2ff, var(--color-bg) 55%);
  padding: 20px;
}

.auth-card {
  width: 100%;
  max-width: 380px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 34px 32px;
}

.auth-card h1 {
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 4px;
}

.auth-card p.sub {
  color: var(--color-text-muted);
  font-size: 13.5px;
  margin: 0 0 24px;
}

.auth-card .btn { width: 100%; padding: 11px; margin-top: 6px; }

.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--color-text-muted);
}