/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary:     #2563eb;
  --primary-dk:  #1d4ed8;
  --success:     #16a34a;
  --danger:      #dc2626;
  --warning:     #d97706;
  --info:        #0891b2;
  --bg:          #f1f5f9;
  --surface:     #ffffff;
  --border:      #e2e8f0;
  --text:        #1e293b;
  --text-muted:  #64748b;
  --nav-bg:      #1e293b;
  --nav-text:    #cbd5e1;
  --nav-active:  #2563eb;
  --radius:      8px;
  --shadow:      0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:   0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
}

html { font-size: 16px; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

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

/* ── Auth Pages ── */
.auth-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1rem;
}

.auth-card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 2rem;
  width: 100%;
  max-width: 420px;
}

.auth-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  text-align: center;
  margin-bottom: .25rem;
}

.auth-subtitle {
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.auth-link { text-align: center; margin-top: 1rem; font-size: .875rem; }

/* ── Forms ── */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-size: .875rem; font-weight: 500; margin-bottom: .35rem; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: .6rem .75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: .9rem;
  color: var(--text);
  background: var(--surface);
  transition: border-color .15s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.15);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .6rem 1.25rem;
  border: none;
  border-radius: var(--radius);
  font-size: .9rem;
  font-weight: 500;
  cursor: pointer;
  transition: background .15s, opacity .15s;
  text-decoration: none;
}
.btn-primary   { background: var(--primary);   color: #fff; }
.btn-primary:hover { background: var(--primary-dk); text-decoration: none; }
.btn-success   { background: var(--success);   color: #fff; }
.btn-danger    { background: var(--danger);    color: #fff; }
.btn-secondary { background: var(--border);    color: var(--text); }
.btn-sm        { padding: .35rem .75rem; font-size: .8rem; }
.btn-block     { width: 100%; justify-content: center; }

/* ── Alerts ── */
.alert {
  padding: .75rem 1rem;
  border-radius: var(--radius);
  font-size: .875rem;
  margin-bottom: 1rem;
  border-left: 4px solid;
}
.alert-error   { background: #fef2f2; border-color: var(--danger);  color: #991b1b; }
.alert-success { background: #f0fdf4; border-color: var(--success); color: #166534; }
.alert-info    { background: #ecfeff; border-color: var(--info);    color: #164e63; }
.alert-warning { background: #fffbeb; border-color: var(--warning); color: #92400e; }

/* ── App Shell ── */
.app-shell {
  display: grid;
  grid-template-columns: 240px 1fr;
  grid-template-rows: 56px 1fr;
  min-height: 100vh;
}

/* Top bar */
.topbar {
  grid-column: 1 / -1;
  background: var(--nav-bg);
  display: flex;
  align-items: center;
  padding: 0 1rem;
  gap: 1rem;
  position: sticky;
  top: 0;
  z-index: 100;
}

.topbar-brand {
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  flex: 1;
}

.topbar-user {
  color: var(--nav-text);
  font-size: .875rem;
  display: flex;
  align-items: center;
  gap: .5rem;
}

.topbar-user img {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
}

.topbar-user .avatar-placeholder {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: .75rem;
  font-weight: 700;
}

.btn-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.4rem;
  cursor: pointer;
  padding: .25rem;
}

/* Sidebar */
.sidebar {
  background: var(--nav-bg);
  padding: 1rem 0;
  overflow-y: auto;
}

.sidebar-section {
  padding: .5rem 1rem .25rem;
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: #475569;
  font-weight: 600;
}

.sidebar nav a {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .6rem 1.25rem;
  color: var(--nav-text);
  font-size: .875rem;
  transition: background .15s, color .15s;
  text-decoration: none;
}

.sidebar nav a:hover,
.sidebar nav a.active {
  background: rgba(255,255,255,.07);
  color: #fff;
  text-decoration: none;
}

.sidebar nav a.active {
  border-left: 3px solid var(--nav-active);
}

/* Main content area */
.main-content {
  padding: 1.5rem;
  overflow-y: auto;
}

/* Page header */
.page-header { margin-bottom: 1.5rem; }
.page-header h1 { font-size: 1.4rem; font-weight: 700; }
.page-header p  { color: var(--text-muted); font-size: .875rem; margin-top: .25rem; }

/* ── Cards & Widgets ── */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.card-title {
  font-size: .95rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: .25rem;
}

.stat-card .stat-label { font-size: .8rem; color: var(--text-muted); font-weight: 500; }
.stat-card .stat-value { font-size: 1.75rem; font-weight: 700; color: var(--text); }
.stat-card .stat-sub   { font-size: .75rem; color: var(--text-muted); }

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1rem;
}

/* ── Tables ── */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .875rem; }
thead th { background: var(--bg); padding: .6rem .75rem; text-align: left; font-weight: 600; font-size: .8rem; color: var(--text-muted); }
tbody td { padding: .6rem .75rem; border-bottom: 1px solid var(--border); vertical-align: middle; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: #f8fafc; }

/* ── Badges ── */
.badge {
  display: inline-block;
  padding: .2rem .55rem;
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .02em;
}
.badge-success { background: #dcfce7; color: #166534; }
.badge-danger  { background: #fee2e2; color: #991b1b; }
.badge-warning { background: #fef9c3; color: #854d0e; }
.badge-info    { background: #e0f2fe; color: #075985; }
.badge-muted   { background: #f1f5f9; color: #475569; }

/* ── Error page ── */
.error-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.error-box  { text-align: center; }
.error-box h1 { font-size: 5rem; font-weight: 900; color: var(--text-muted); }
.error-box p  { margin: 1rem 0; color: var(--text-muted); }

/* ── Responsive ── */
@media (max-width: 768px) {
  .app-shell {
    grid-template-columns: 1fr;
    grid-template-rows: 56px 1fr;
  }

  .sidebar {
    position: fixed;
    top: 56px;
    left: -240px;
    width: 240px;
    height: calc(100vh - 56px);
    z-index: 99;
    transition: left .25s ease;
  }

  .sidebar.open { left: 0; }

  .btn-menu-toggle { display: block; }

  .main-content { padding: 1rem; }

  .stat-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 400px) {
  .stat-grid { grid-template-columns: 1fr; }
}

/* ── Print / PDF ── */
@media print {
  .topbar,
  .sidebar,
  .btn-menu-toggle,
  .page-actions,
  .no-print {
    display: none !important;
  }

  .app-shell {
    display: block !important;
  }

  .main-content {
    padding: 0 !important;
  }

  body {
    font-size: 11pt;
    color: #000;
    background: #fff;
  }

  .card {
    box-shadow: none !important;
    border: 1px solid #ccc;
    border-radius: 0;
    page-break-inside: avoid;
    margin-bottom: .75rem;
  }

  .stat-grid {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
  }

  .stat-card {
    border: 1px solid #ccc;
    flex: 1 1 120px;
    padding: .5rem;
    box-shadow: none;
  }

  .badge {
    border: 1px solid #999;
    background: transparent !important;
    color: #000 !important;
    print-color-adjust: exact;
  }

  a { color: #000; text-decoration: none; }

  thead th {
    background: #1e293b !important;
    color: #fff !important;
    print-color-adjust: exact;
  }

  .page-header h1 { font-size: 1.2rem; }
}