/* ============================================================
   assets/css/main.css
   Sistema de Sueldos — Hoja de estilos principal
   ============================================================ */

/* ── Variables de diseño ─────────────────────────────────── */
:root {
  /* Paleta de colores */
  --c-primary:      #2563EB;
  --c-primary-dark: #1D4ED8;
  --c-primary-light:#EFF6FF;
  --c-success:      #16A34A;
  --c-success-bg:   #F0FDF4;
  --c-warning:      #D97706;
  --c-warning-bg:   #FFFBEB;
  --c-danger:       #DC2626;
  --c-danger-bg:    #FEF2F2;
  --c-info:         #0891B2;
  --c-info-bg:      #ECFEFF;

  /* Grises */
  --c-gray-50:  #F8FAFC;
  --c-gray-100: #F1F5F9;
  --c-gray-200: #E2E8F0;
  --c-gray-300: #CBD5E1;
  --c-gray-400: #94A3B8;
  --c-gray-500: #64748B;
  --c-gray-600: #475569;
  --c-gray-700: #334155;
  --c-gray-800: #1E293B;
  --c-gray-900: #0F172A;

  /* Tipografía */
  --font:        'Inter', system-ui, -apple-system, sans-serif;
  --fs-xs:       0.75rem;
  --fs-sm:       0.875rem;
  --fs-base:     1rem;
  --fs-lg:       1.125rem;
  --fs-xl:       1.25rem;
  --fs-2xl:      1.5rem;
  --fs-3xl:      1.875rem;

  /* Layout */
  --sidebar-w:   260px;
  --topbar-h:    64px;
  --radius:      0.5rem;
  --radius-lg:   0.75rem;
  --shadow-sm:   0 1px 3px rgba(0,0,0,.08);
  --shadow:      0 4px 12px rgba(0,0,0,.10);
  --shadow-lg:   0 10px 30px rgba(0,0,0,.12);
  --transition:  0.2s ease;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font);
  font-size:   var(--fs-base);
  color:       var(--c-gray-800);
  background:  var(--c-gray-100);
  display:     flex;
  min-height:  100vh;
}

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

img { max-width: 100%; display: block; }

/* ── Sidebar ─────────────────────────────────────────────── */
.sidebar {
  width:           var(--sidebar-w);
  min-height:      100vh;
  background:      var(--c-gray-900);
  color:           var(--c-gray-300);
  display:         flex;
  flex-direction:  column;
  position:        fixed;
  top:             0; left: 0;
  z-index:         100;
  transition:      transform var(--transition);
  overflow-y:      auto;
}

.sidebar-logo {
  display:         flex;
  align-items:     center;
  gap:             0.75rem;
  padding:         1.5rem 1.25rem;
  border-bottom:   1px solid rgba(255,255,255,.08);
}
.logo-icon  { font-size: 1.5rem; }
.logo-text  { font-size: var(--fs-lg); font-weight: 700; color: #fff; letter-spacing: -.3px; }

.sidebar-nav { flex: 1; padding: 1rem 0; }

.nav-section { margin-bottom: 1.5rem; }
.nav-label {
  display:      block;
  font-size:    var(--fs-xs);
  font-weight:  600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color:        var(--c-gray-500);
  padding:      0 1.25rem 0.5rem;
}

.nav-link {
  display:       flex;
  align-items:   center;
  gap:           0.6rem;
  padding:       0.55rem 1.25rem;
  font-size:     var(--fs-sm);
  color:         var(--c-gray-400);
  border-radius: 0;
  transition:    background var(--transition), color var(--transition);
  text-decoration: none;
}
.nav-link:hover, .nav-link.active {
  background: rgba(255,255,255,.08);
  color: #fff;
  text-decoration: none;
}
.nav-link.active { border-left: 3px solid var(--c-primary); }
.nav-icon { font-size: 1rem; width: 1.2rem; }

.sidebar-user {
  display:        flex;
  align-items:    center;
  gap:            0.75rem;
  padding:        1rem 1.25rem;
  border-top:     1px solid rgba(255,255,255,.08);
  margin-top:     auto;
}
.user-info   { display: flex; align-items: center; gap: 0.6rem; flex: 1; min-width: 0; }
.user-avatar {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--c-primary);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: var(--fs-sm); font-weight: 700;
  flex-shrink: 0;
}
.user-name  { font-size: var(--fs-xs); font-weight: 600; color: #fff; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-role  { font-size: var(--fs-xs); color: var(--c-gray-500); text-transform: capitalize; }
.btn-logout { color: var(--c-gray-500); font-size: 1.2rem; transition: color var(--transition); }
.btn-logout:hover { color: var(--c-danger); text-decoration: none; }

/* ── Main content ────────────────────────────────────────── */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-w);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Topbar ──────────────────────────────────────────────── */
.topbar {
  height:          var(--topbar-h);
  background:      #fff;
  border-bottom:   1px solid var(--c-gray-200);
  display:         flex;
  align-items:     center;
  gap:             1rem;
  padding:         0 1.5rem;
  position:        sticky;
  top:             0;
  z-index:         50;
  box-shadow:      var(--shadow-sm);
}
.btn-sidebar-toggle { display: none; background: none; border: none; font-size: 1.4rem; cursor: pointer; color: var(--c-gray-600); }
.topbar-title  { font-size: var(--fs-lg); font-weight: 600; color: var(--c-gray-800); flex: 1; }
.topbar-actions { display: flex; align-items: center; gap: 1rem; }
.topbar-date { font-size: var(--fs-sm); color: var(--c-gray-500); }

/* ── Page content ────────────────────────────────────────── */
.page-content { padding: 1.5rem; flex: 1; }

/* ── Cards ───────────────────────────────────────────────── */
.card {
  background:    #fff;
  border-radius: var(--radius-lg);
  border:        1px solid var(--c-gray-200);
  box-shadow:    var(--shadow-sm);
  overflow:      hidden;
}
.card-header {
  padding:     1rem 1.25rem;
  border-bottom: 1px solid var(--c-gray-200);
  display:     flex;
  align-items: center;
  justify-content: space-between;
  gap:         1rem;
}
.card-title  { font-size: var(--fs-base); font-weight: 600; color: var(--c-gray-800); }
.card-body   { padding: 1.25rem; }
.card-footer { padding: 1rem 1.25rem; border-top: 1px solid var(--c-gray-200); background: var(--c-gray-50); }

/* ── Stats cards (dashboard) ─────────────────────────────── */
.stats-grid {
  display:               grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap:                   1rem;
  margin-bottom:         1.5rem;
}
.stat-card {
  background:    #fff;
  border-radius: var(--radius-lg);
  padding:       1.25rem;
  border:        1px solid var(--c-gray-200);
  box-shadow:    var(--shadow-sm);
  display:       flex;
  align-items:   flex-start;
  gap:           1rem;
}
.stat-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}
.stat-icon.blue    { background: var(--c-primary-light); }
.stat-icon.green   { background: var(--c-success-bg); }
.stat-icon.yellow  { background: var(--c-warning-bg); }
.stat-icon.red     { background: var(--c-danger-bg); }
.stat-icon.cyan    { background: var(--c-info-bg); }

.stat-body      { flex: 1; min-width: 0; }
.stat-label     { font-size: var(--fs-xs); color: var(--c-gray-500); font-weight: 500; text-transform: uppercase; letter-spacing: .04em; }
.stat-value     { font-size: var(--fs-2xl); font-weight: 700; color: var(--c-gray-900); line-height: 1.2; margin-top: .2rem; }
.stat-delta     { font-size: var(--fs-xs); color: var(--c-gray-500); margin-top: .25rem; }
.stat-delta.up  { color: var(--c-success); }
.stat-delta.dn  { color: var(--c-danger); }

/* ── Tablas ──────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }
table.table {
  width: 100%; border-collapse: collapse;
  font-size: var(--fs-sm);
}
.table th {
  padding: .6rem 1rem;
  text-align: left;
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--c-gray-500);
  background: var(--c-gray-50);
  border-bottom: 2px solid var(--c-gray-200);
  white-space: nowrap;
}
.table td {
  padding: .75rem 1rem;
  border-bottom: 1px solid var(--c-gray-100);
  color: var(--c-gray-700);
  vertical-align: middle;
}
.table tbody tr:hover { background: var(--c-gray-50); }
.table tbody tr:last-child td { border-bottom: none; }
.table .col-num { text-align: right; font-variant-numeric: tabular-nums; font-family: 'Courier New', monospace; }
.table .col-center { text-align: center; }

/* ── Formularios ─────────────────────────────────────────── */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}
.form-group { display: flex; flex-direction: column; gap: .35rem; }
.form-group.full { grid-column: 1 / -1; }

label { font-size: var(--fs-sm); font-weight: 500; color: var(--c-gray-700); }
label .req { color: var(--c-danger); margin-left: 2px; }

.form-control, .form-select {
  width: 100%;
  padding: .55rem .85rem;
  font-size: var(--fs-sm);
  font-family: var(--font);
  color: var(--c-gray-800);
  background: #fff;
  border: 1.5px solid var(--c-gray-300);
  border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}
.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%2364748B' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2rem;
}
.form-control:focus, .form-select:focus {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}
.form-hint { font-size: var(--fs-xs); color: var(--c-gray-500); }
.form-error { font-size: var(--fs-xs); color: var(--c-danger); }

/* ── Botones ─────────────────────────────────────────────── */
.btn {
  display:         inline-flex;
  align-items:     center;
  gap:             .4rem;
  padding:         .55rem 1.1rem;
  font-size:       var(--fs-sm);
  font-weight:     500;
  font-family:     var(--font);
  border:          1.5px solid transparent;
  border-radius:   var(--radius);
  cursor:          pointer;
  transition:      background var(--transition), border-color var(--transition), color var(--transition), box-shadow var(--transition);
  text-decoration: none;
  white-space:     nowrap;
  line-height:     1.4;
}
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn-primary   { background: var(--c-primary);     color: #fff; border-color: var(--c-primary); }
.btn-primary:hover   { background: var(--c-primary-dark); border-color: var(--c-primary-dark); text-decoration: none; color: #fff; }
.btn-success   { background: var(--c-success);     color: #fff; border-color: var(--c-success); }
.btn-success:hover   { background: #15803d; text-decoration: none; color: #fff; }
.btn-danger    { background: var(--c-danger);      color: #fff; border-color: var(--c-danger); }
.btn-danger:hover    { background: #b91c1c; text-decoration: none; color: #fff; }
.btn-outline   { background: transparent; color: var(--c-primary); border-color: var(--c-primary); }
.btn-outline:hover   { background: var(--c-primary-light); text-decoration: none; }
.btn-ghost     { background: transparent; color: var(--c-gray-600); border-color: var(--c-gray-300); }
.btn-ghost:hover     { background: var(--c-gray-100); text-decoration: none; }
.btn-sm        { padding: .35rem .75rem; font-size: var(--fs-xs); }
.btn-lg        { padding: .75rem 1.5rem; font-size: var(--fs-base); }

/* ── Badges / Pills ──────────────────────────────────────── */
.badge {
  display:      inline-flex;
  align-items:  center;
  padding:      .2rem .6rem;
  font-size:    var(--fs-xs);
  font-weight:  600;
  border-radius: 9999px;
}
.badge-blue    { background: var(--c-primary-light); color: var(--c-primary); }
.badge-green   { background: var(--c-success-bg);    color: var(--c-success); }
.badge-yellow  { background: var(--c-warning-bg);    color: var(--c-warning); }
.badge-red     { background: var(--c-danger-bg);     color: var(--c-danger); }
.badge-gray    { background: var(--c-gray-100);      color: var(--c-gray-600); }

/* ── Alerts / Flash messages ─────────────────────────────── */
.flash-message {
  display:       flex;
  align-items:   center;
  justify-content: space-between;
  padding:       .75rem 1.25rem;
  border-radius: var(--radius);
  margin:        1rem 1.5rem 0;
  font-size:     var(--fs-sm);
  font-weight:   500;
}
.flash-success { background: var(--c-success-bg); color: var(--c-success); border: 1px solid #bbf7d0; }
.flash-error   { background: var(--c-danger-bg);  color: var(--c-danger);  border: 1px solid #fecaca; }
.flash-warning { background: var(--c-warning-bg); color: var(--c-warning); border: 1px solid #fde68a; }
.flash-close   { background: none; border: none; cursor: pointer; font-size: 1.1rem; color: inherit; opacity: .7; }
.flash-close:hover { opacity: 1; }

/* ── Pagination ──────────────────────────────────────────── */
.pagination {
  display:     flex;
  align-items: center;
  gap:         .4rem;
  flex-wrap:   wrap;
}
.page-link {
  padding:       .35rem .65rem;
  border:        1.5px solid var(--c-gray-300);
  border-radius: var(--radius);
  font-size:     var(--fs-sm);
  color:         var(--c-gray-600);
  transition:    background var(--transition);
}
.page-link:hover    { background: var(--c-gray-100); text-decoration: none; }
.page-link.active   { background: var(--c-primary); border-color: var(--c-primary); color: #fff; }
.page-link.disabled { opacity: .4; pointer-events: none; }

/* ── Modal ───────────────────────────────────────────────── */
.modal-backdrop {
  display:         none;
  position:        fixed;
  inset:           0;
  background:      rgba(0,0,0,.5);
  z-index:         200;
  align-items:     center;
  justify-content: center;
}
.modal-backdrop.open { display: flex; }
.modal {
  background:    #fff;
  border-radius: var(--radius-lg);
  box-shadow:    var(--shadow-lg);
  width:         90%;
  max-width:     600px;
  max-height:    90vh;
  overflow-y:    auto;
  animation:     slideUp .2s ease;
}
@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}
.modal-header {
  padding:       1rem 1.25rem;
  border-bottom: 1px solid var(--c-gray-200);
  display:       flex;
  align-items:   center;
  justify-content: space-between;
}
.modal-title  { font-size: var(--fs-base); font-weight: 600; }
.modal-close  { background: none; border: none; font-size: 1.4rem; cursor: pointer; color: var(--c-gray-500); }
.modal-body   { padding: 1.25rem; }
.modal-footer { padding: 1rem 1.25rem; border-top: 1px solid var(--c-gray-200); display: flex; justify-content: flex-end; gap: .6rem; }

/* ── Recibo de sueldo ────────────────────────────────────── */
.recibo-wrapper { max-width: 820px; margin: 0 auto; }
.recibo {
  background: #fff;
  border: 1px solid var(--c-gray-200);
  border-radius: var(--radius);
  padding: 1.5rem;
  font-size: var(--fs-sm);
  color: var(--c-gray-800);
  box-shadow: var(--shadow);
}
.recibo-header { border-bottom: 2px solid var(--c-primary); padding-bottom: 1rem; margin-bottom: 1rem; }
.recibo-empresa h2 { font-size: var(--fs-xl); font-weight: 700; color: var(--c-primary); }
.recibo-empleado-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .5rem 1.5rem;
  background: var(--c-gray-50);
  border-radius: var(--radius);
  padding: .75rem 1rem;
  margin: .75rem 0;
  font-size: var(--fs-xs);
}
.recibo-fila { display: flex; flex-direction: column; }
.recibo-fila strong { font-weight: 600; color: var(--c-gray-500); text-transform: uppercase; font-size: 10px; letter-spacing: .05em; }
.recibo-conceptos th { background: var(--c-primary); color: #fff; border-bottom: none; }
.recibo-total-row td { font-weight: 700; background: var(--c-gray-50); }
.recibo-neto {
  background: var(--c-primary);
  color: #fff;
  text-align: center;
  padding: 1rem;
  border-radius: var(--radius);
  margin-top: 1rem;
}
.recibo-neto .neto-label { font-size: var(--fs-xs); text-transform: uppercase; letter-spacing: .06em; opacity: .85; }
.recibo-neto .neto-value { font-size: var(--fs-3xl); font-weight: 700; }
.recibo-firma-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--c-gray-300);
}
.firma-box { text-align: center; }
.firma-line { border-top: 1px solid var(--c-gray-400); padding-top: .4rem; font-size: var(--fs-xs); color: var(--c-gray-600); margin-top: 2.5rem; }

/* ── Dashboard chart area ────────────────────────────────── */
.chart-placeholder {
  background:  var(--c-gray-50);
  border:      2px dashed var(--c-gray-200);
  border-radius: var(--radius);
  height:      220px;
  display:     flex;
  align-items: center;
  justify-content: center;
  color:       var(--c-gray-400);
  font-size:   var(--fs-sm);
}
.chart-bars {
  display:     flex;
  align-items: flex-end;
  gap:         .5rem;
  height:      180px;
  padding:     0 1rem;
}
.chart-bar-wrap { display: flex; flex-direction: column; align-items: center; gap: .4rem; flex: 1; }
.chart-bar {
  width:         100%;
  background:    var(--c-primary);
  border-radius: 4px 4px 0 0;
  min-height:    4px;
  transition:    height .4s ease;
  position:      relative;
}
.chart-bar:hover { background: var(--c-primary-dark); }
.chart-bar-label { font-size: 10px; color: var(--c-gray-500); white-space: nowrap; }
.chart-bar-val { font-size: 10px; color: var(--c-gray-600); font-weight: 600; }

/* ── Utilidades ──────────────────────────────────────────── */
.flex         { display: flex; }
.flex-col     { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: .25rem; }
.gap-2 { gap: .5rem; }
.gap-3 { gap: .75rem; }
.gap-4 { gap: 1rem; }
.mt-1  { margin-top: .25rem; }
.mt-2  { margin-top: .5rem; }
.mt-4  { margin-top: 1rem; }
.mt-6  { margin-top: 1.5rem; }
.mb-2  { margin-bottom: .5rem; }
.mb-4  { margin-bottom: 1rem; }
.mb-6  { margin-bottom: 1.5rem; }
.text-sm   { font-size: var(--fs-sm); }
.text-xs   { font-size: var(--fs-xs); }
.text-muted { color: var(--c-gray-500); }
.text-right { text-align: right; }
.font-bold  { font-weight: 700; }
.font-mono  { font-family: 'Courier New', monospace; }
.w-full { width: 100%; }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); box-shadow: var(--shadow-lg); }
  .main-content { margin-left: 0; }
  .btn-sidebar-toggle { display: block; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .form-grid { grid-template-columns: 1fr; }
  .recibo-empleado-grid { grid-template-columns: 1fr; }
  .recibo-firma-section { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .page-content { padding: 1rem .75rem; }
}

/* ── Login page ──────────────────────────────────────────── */
.login-page {
  min-height: 100vh;
  background: linear-gradient(135deg, var(--c-gray-900) 0%, #1a2744 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.login-card {
  background:    #fff;
  border-radius: var(--radius-lg);
  padding:       2.5rem;
  width:         100%;
  max-width:     420px;
  box-shadow:    var(--shadow-lg);
}
.login-logo { text-align: center; margin-bottom: 1.5rem; }
.login-logo .emoji { font-size: 2.5rem; }
.login-logo h1 { font-size: var(--fs-2xl); font-weight: 700; color: var(--c-gray-900); margin-top: .5rem; }
.login-logo p  { font-size: var(--fs-sm); color: var(--c-gray-500); }

/* ── Print styles ────────────────────────────────────────── */
@media print {
  .sidebar, .topbar, .btn, .nav-link, .flash-message, .no-print { display: none !important; }
  .main-content { margin-left: 0 !important; }
  .recibo { box-shadow: none; border: 1px solid #ccc; }
  body { background: #fff; }
}