/* ============================================================
   PYTEC — Variables y estilos base
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  /* Colores principales */
  --color-primary:     #1E2A3A;
  --color-accent:      #00B4D8;
  --color-accent-dark: #0096B5;
  --color-success:     #2ECC71;
  --color-warning:     #F39C12;
  --color-danger:      #E74C3C;
  --color-info:        #3498DB;

  /* Fondos */
  --color-bg:          #F4F6F8;
  --color-card:        #FFFFFF;
  --color-sidebar:     #1E2A3A;
  --color-sidebar-hover: #2C3E50;

  /* Textos */
  --color-text:        #2C3E50;
  --color-text-muted:  #7F8C8D;
  --color-text-light:  #FFFFFF;

  /* Bordes */
  --color-border:      #E0E6ED;
  --color-border-dark: #C8D3DC;

  /* Layout */
  --sidebar-width:     260px;
  --header-height:     64px;

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

  /* Espaciado */
  --radius-sm:         4px;
  --radius:            8px;
  --radius-lg:         12px;
  --shadow-sm:         0 1px 3px rgba(0,0,0,.08);
  --shadow:            0 4px 12px rgba(0,0,0,.10);
  --shadow-lg:         0 8px 24px rgba(0,0,0,.12);

  /* Transiciones */
  --transition:        150ms ease;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
}
a { color: var(--color-accent); text-decoration: none; }
a:hover { color: var(--color-accent-dark); }
img { max-width: 100%; display: block; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }

/* ============================================================
   Layout Principal
   ============================================================ */

.layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background: var(--color-sidebar);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,.1) transparent;
}

.sidebar-brand {
  padding: 24px 20px 20px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}

.sidebar-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 2px;
}

.sidebar-logo span {
  color: var(--color-accent);
}

.sidebar-subtitle {
  font-size: var(--font-size-xs);
  color: rgba(255,255,255,.4);
  margin-top: 2px;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 0;
}

.nav-section {
  padding: 8px 20px 4px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: rgba(255,255,255,.3);
  margin-top: 8px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  color: rgba(255,255,255,.7);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: 0;
  transition: background var(--transition), color var(--transition);
  position: relative;
  cursor: pointer;
}

.nav-item:hover, .nav-item.active {
  background: var(--color-sidebar-hover);
  color: #fff;
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--color-accent);
  border-radius: 0 2px 2px 0;
}

.nav-item i { width: 18px; text-align: center; font-size: 1rem; }

.nav-badge {
  margin-left: auto;
  background: var(--color-danger);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 10px;
  min-width: 18px;
  text-align: center;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,.08);
  font-size: var(--font-size-xs);
  color: rgba(255,255,255,.3);
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  color: rgba(255,255,255,.6);
  font-size: var(--font-size-sm);
  border-top: 1px solid rgba(255,255,255,.08);
}

.sidebar-user-name { font-weight: 500; color: rgba(255,255,255,.85); }
.sidebar-user-role { font-size: var(--font-size-xs); color: rgba(255,255,255,.4); }

/* Contenido principal */
.main {
  margin-left: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.topbar {
  height: var(--header-height);
  background: var(--color-card);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  padding: 0 28px;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 50;
}

.topbar-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-primary);
  flex: 1;
}

.topbar-actions { display: flex; align-items: center; gap: 12px; }

.content {
  flex: 1;
  padding: 28px;
}

/* ============================================================
   Cards
   ============================================================ */

.card {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.card-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.card-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-primary);
}

.card-body { padding: 24px; }
.card-footer {
  padding: 14px 24px;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* ============================================================
   Stats Cards
   ============================================================ */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  gap: 16px;
}

.stat-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.stat-icon.accent   { background: rgba(0,180,216,.12); color: var(--color-accent); }
.stat-icon.success  { background: rgba(46,204,113,.12); color: var(--color-success); }
.stat-icon.warning  { background: rgba(243,156,18,.12); color: var(--color-warning); }
.stat-icon.danger   { background: rgba(231,76,60,.12); color: var(--color-danger); }
.stat-icon.primary  { background: rgba(30,42,58,.12); color: var(--color-primary); }

.stat-value {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
}

.stat-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .5px;
  margin-top: 4px;
}

/* ============================================================
   Tablas
   ============================================================ */

.table-wrap { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

thead th {
  background: var(--color-bg);
  padding: 10px 16px;
  text-align: left;
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

tbody td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}

tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: rgba(0,180,216,.03); }

/* ============================================================
   Badges
   ============================================================ */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: var(--font-size-xs);
  font-weight: 600;
  white-space: nowrap;
}

.badge-success   { background: rgba(46,204,113,.12); color: #1e8b4e; }
.badge-warning   { background: rgba(243,156,18,.12); color: #b87a00; }
.badge-danger    { background: rgba(231,76,60,.12); color: #c0392b; }
.badge-info      { background: rgba(52,152,219,.12); color: #2471a3; }
.badge-secondary { background: rgba(127,140,141,.12); color: #5d6d6e; }
.badge-pulse     { animation: pulse 1.5s infinite; }

@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.5} }

/* ============================================================
   Botones
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: var(--radius);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  text-decoration: none;
}

.btn:disabled { opacity: .5; cursor: not-allowed; }

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

.btn-dark     { background: var(--color-primary); color: #fff; }
.btn-dark:hover     { background: #2c3e50; color: #fff; }

.btn-success  { background: var(--color-success); color: #fff; }
.btn-success:hover  { background: #27ae60; color: #fff; }

.btn-warning  { background: var(--color-warning); color: #fff; }
.btn-warning:hover  { background: #d68910; color: #fff; }

.btn-danger   { background: var(--color-danger); color: #fff; }
.btn-danger:hover   { background: #c0392b; color: #fff; }

.btn-outline  { background: transparent; border: 1px solid var(--color-border); color: var(--color-text); }
.btn-outline:hover  { background: var(--color-bg); }

.btn-sm { padding: 5px 12px; font-size: var(--font-size-xs); }
.btn-lg { padding: 12px 28px; font-size: var(--font-size-base); }

/* ============================================================
   Formularios
   ============================================================ */

.form-group { margin-bottom: 20px; }

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.form-label .required { color: var(--color-danger); margin-left: 2px; }

.form-control {
  width: 100%;
  padding: 9px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: #fff;
  color: var(--color-text);
  font-size: var(--font-size-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-control:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0,180,216,.12);
}

.form-control::placeholder { color: var(--color-text-muted); }
textarea.form-control { resize: vertical; min-height: 80px; }
select.form-control { cursor: pointer; }

.form-hint {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: 4px;
}

.form-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }

/* ============================================================
   Alertas / Flash
   ============================================================ */

.alert {
  padding: 12px 18px;
  border-radius: var(--radius);
  font-size: var(--font-size-sm);
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 20px;
  border: 1px solid transparent;
}

.alert-success { background: rgba(46,204,113,.1); border-color: rgba(46,204,113,.3); color: #1e8b4e; }
.alert-error   { background: rgba(231,76,60,.1); border-color: rgba(231,76,60,.3); color: #c0392b; }
.alert-warning { background: rgba(243,156,18,.1); border-color: rgba(243,156,18,.3); color: #b87a00; }
.alert-info    { background: rgba(52,152,219,.1); border-color: rgba(52,152,219,.3); color: #2471a3; }

/* ============================================================
   Paginación
   ============================================================ */

.pagination {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 16px 24px;
  border-top: 1px solid var(--color-border);
}

.page-btn {
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  background: #fff;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.page-btn:hover { background: var(--color-bg); }
.page-btn.active { background: var(--color-accent); border-color: var(--color-accent); color: #fff; }
.page-btn:disabled { opacity: .4; cursor: default; }

/* ============================================================
   Modales
   ============================================================ */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.4);
  backdrop-filter: blur(2px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.modal-overlay.open { opacity: 1; pointer-events: all; }

.modal {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title { font-weight: 600; font-size: var(--font-size-lg); }
.modal-close { background: none; border: none; cursor: pointer; font-size: 1.25rem; color: var(--color-text-muted); }
.modal-body  { padding: 24px; }
.modal-footer { padding: 16px 24px; border-top: 1px solid var(--color-border); display: flex; gap: 10px; justify-content: flex-end; }

/* ============================================================
   Utilidades
   ============================================================ */

.flex        { display: flex; }
.flex-col    { flex-direction: column; }
.items-center{ align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2       { gap: 8px; }
.gap-3       { gap: 12px; }
.gap-4       { gap: 16px; }
.mt-4        { margin-top: 16px; }
.mb-4        { margin-bottom: 16px; }
.mb-6        { margin-bottom: 24px; }
.text-muted  { color: var(--color-text-muted); }
.text-sm     { font-size: var(--font-size-sm); }
.text-xs     { font-size: var(--font-size-xs); }
.font-semibold { font-weight: 600; }
.truncate    { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.w-full      { width: 100%; }
.text-right  { text-align: right; }
.text-center { text-align: center; }
.code        { font-family: 'Courier New', monospace; font-size: 0.85em; background: var(--color-bg); padding: 2px 6px; border-radius: 4px; }

/* ============================================================
   Auth Pages
   ============================================================ */

.auth-page {
  min-height: 100vh;
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.auth-card {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  padding: 40px;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-lg);
}

.auth-logo {
  text-align: center;
  margin-bottom: 32px;
}

.auth-logo-text {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 3px;
}

.auth-logo-text span { color: var(--color-accent); }
.auth-logo-sub { font-size: var(--font-size-xs); color: var(--color-text-muted); margin-top: 4px; letter-spacing: 1px; text-transform: uppercase; }

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); transition: transform .2s ease; }
  .sidebar.open { transform: translateX(0); }
  .main { margin-left: 0; }
  .content { padding: 16px; }
  .form-grid-2, .form-grid-3 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}