:root {
  --primary:   #2563eb;
  --primary-d: #1d4ed8;
  --success:   #16a34a;
  --danger:    #dc2626;
  --warning:   #d97706;
  --bg:        #f1f5f9;
  --card:      #ffffff;
  --border:    #e2e8f0;
  --text:      #1e293b;
  --muted:     #64748b;
  --sidebar-w: 220px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Segoe UI', system-ui, sans-serif;
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
}

/* ── Login ── */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1e3a5f 0%, #2563eb 100%);
}
.login-card {
  background: var(--card);
  border-radius: 12px;
  padding: 2.5rem 2rem;
  width: 340px;
  box-shadow: 0 20px 60px rgba(0,0,0,.25);
}
.login-card .logo {
  text-align: center;
  margin-bottom: 1.5rem;
}
.login-card .logo h1 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
}
.login-card .logo p {
  font-size: .8rem;
  color: var(--muted);
}

/* ── Layout principal ── */
.app-layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-w);
  background: #1e293b;
  color: #cbd5e1;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}
.sidebar .brand {
  padding: 1.25rem 1rem;
  font-weight: 700;
  font-size: .95rem;
  color: #fff;
  border-bottom: 1px solid #334155;
}
.sidebar nav a {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .65rem 1rem;
  color: #94a3b8;
  text-decoration: none;
  font-size: .85rem;
  transition: background .15s, color .15s;
}
.sidebar nav a:hover,
.sidebar nav a.active {
  background: #334155;
  color: #fff;
}
.sidebar .user-info {
  margin-top: auto;
  padding: 1rem;
  border-top: 1px solid #334155;
  font-size: .78rem;
  color: #64748b;
}
.sidebar .user-info strong { color: #94a3b8; display: block; }

.main-content {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
}

/* ── Tarjetas ── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  margin-bottom: 1rem;
}
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}
.card-header h2 {
  font-size: 1rem;
  font-weight: 600;
}

/* ── Formulario ── */
.form-group {
  margin-bottom: .9rem;
}
.form-group label {
  display: block;
  font-size: .8rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: .3rem;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: .5rem .7rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: .88rem;
  color: var(--text);
  background: #fff;
  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,.12);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .75rem;
}
.form-row.three { grid-template-columns: 1fr 1fr 1fr; }

/* ── Botones ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .45rem 1rem;
  border: none;
  border-radius: 6px;
  font-size: .85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s, transform .1s;
}
.btn:active { transform: scale(.97); }
.btn-primary   { background: var(--primary);  color: #fff; }
.btn-primary:hover   { background: var(--primary-d); }
.btn-success   { background: var(--success);  color: #fff; }
.btn-danger    { background: var(--danger);   color: #fff; }
.btn-secondary { background: #e2e8f0; color: var(--text); }
.btn-sm { padding: .3rem .65rem; font-size: .78rem; }
.btn-full { width: 100%; justify-content: center; }

/* ── Tabla ── */
.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: .83rem;
}
thead th {
  background: #f8fafc;
  padding: .6rem .75rem;
  text-align: left;
  font-weight: 600;
  color: var(--muted);
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}
tbody td {
  padding: .55rem .75rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
tbody tr:hover { background: #f8fafc; }

/* ── Badges ── */
.badge {
  display: inline-block;
  padding: .15rem .5rem;
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 600;
}
.badge-green  { background: #dcfce7; color: #166534; }
.badge-yellow { background: #fef9c3; color: #854d0e; }
.badge-blue   { background: #dbeafe; color: #1e40af; }
.badge-red    { background: #fee2e2; color: #991b1b; }
.badge-gray   { background: #f1f5f9; color: #475569; }

/* ── Modal ── */
.modal-backdrop {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}
.modal-backdrop.hidden { display: none; }
.modal {
  background: var(--card);
  border-radius: 10px;
  padding: 1.5rem;
  width: min(700px, 96vw);
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 25px 60px rgba(0,0,0,.3);
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}
.modal-header h3 { font-size: 1.05rem; font-weight: 700; }
.modal-close {
  background: none; border: none; cursor: pointer;
  font-size: 1.3rem; color: var(--muted);
  line-height: 1;
}

/* ── Alertas ── */
.alert {
  padding: .7rem 1rem;
  border-radius: 6px;
  margin-bottom: .75rem;
  font-size: .85rem;
}
.alert-error   { background: #fee2e2; color: #991b1b; border: 1px solid #fca5a5; }
.alert-success { background: #dcfce7; color: #166534; border: 1px solid #86efac; }
.alert.hidden  { display: none; }

/* ── Checkboxes para tipos de examen ── */
.exam-types-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: .4rem;
  margin-top: .3rem;
}
.exam-type-check {
  display: flex;
  align-items: center;
  gap: .4rem;
  padding: .4rem .6rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.exam-type-check:hover { border-color: var(--primary); }
.exam-type-check input[type=checkbox] { cursor: pointer; }
.exam-type-check.selected {
  border-color: var(--primary);
  background: #eff6ff;
}

/* ── Tabs ── */
.tabs {
  display: flex;
  gap: .25rem;
  margin-bottom: 1rem;
  border-bottom: 2px solid var(--border);
}
.tab-btn {
  padding: .5rem 1rem;
  border: none;
  background: none;
  cursor: pointer;
  font-size: .85rem;
  color: var(--muted);
  font-weight: 600;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color .15s;
}
.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* ── Print badge en tabla ── */
.print-status { font-size: 1rem; }

/* ── Filtros ── */
.filters {
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
  align-items: flex-end;
  margin-bottom: 1rem;
}
.filters .form-group { margin-bottom: 0; }

/* ── Toast de impresión ── */
.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: #1e293b;
  color: #fff;
  padding: .75rem 1.25rem;
  border-radius: 8px;
  font-size: .85rem;
  box-shadow: 0 8px 24px rgba(0,0,0,.3);
  z-index: 200;
  transform: translateY(0);
  transition: opacity .3s, transform .3s;
}
.toast.hidden { opacity: 0; pointer-events: none; transform: translateY(10px); }

@media (max-width: 700px) {
  .sidebar { width: 56px; }
  .sidebar .brand, .sidebar nav a span, .sidebar .user-info { display: none; }
  .form-row, .form-row.three { grid-template-columns: 1fr; }
}