:root {
  /* Colors - TrackGRP Theme (Dark Mode) */
  --bg-primary: #0f0f1a;
  --bg-card: #1a1a2e;
  --bg-input: #22223a;
  --bg-hover: #1e1e35;
  
  --text-primary: #e8e8f0;
  --text-secondary: #9494b0;
  --text-muted: #606080;
  
  --primary-color: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: #818cf8;
  
  --success-color: #10b981;
  --success-bg: rgba(16, 185, 129, 0.1);
  
  --warning-color: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.1);
  
  --danger-color: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.1);
  
  --info-color: #3b82f6;
  --info-bg: rgba(59, 130, 246, 0.1);
  
  --border-color: rgba(255, 255, 255, 0.08);
  
  /* Metrics */
  --sidebar-width: 260px;
  --sidebar-collapsed-width: 80px;
  --header-height: 70px;
  
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  font-size: 15px;
}

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

/* ==================
   LAYOUT
   ================== */

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background-color: var(--bg-card);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  transition: width 0.3s ease;
  z-index: 1000;
}

.sidebar.collapsed {
  width: var(--sidebar-collapsed-width);
}

.sidebar-brand {
  height: var(--header-height);
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  border-bottom: 1px solid var(--border-color);
  overflow: hidden;
  white-space: nowrap;
}

.brand-icon {
  color: var(--primary-color);
  min-width: 32px;
  display: flex;
  justify-content: center;
}
.brand-icon svg { width: 28px; height: 28px; }

.brand-text {
  margin-left: 1rem;
  display: flex;
  flex-direction: column;
  transition: opacity 0.2s;
}
.sidebar.collapsed .brand-text { opacity: 0; pointer-events: none; }

.brand-name { font-weight: 700; font-size: 1.125rem; letter-spacing: -0.5px; }
.brand-sub { font-size: 0.75rem; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 1px; }

.sidebar-nav {
  flex: 1;
  padding: 1.5rem 1rem;
  overflow-y: auto;
  overflow-x: hidden;
}

.nav-section-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin: 1.5rem 0 0.5rem 1rem;
  font-weight: 600;
  transition: opacity 0.2s;
}
.sidebar.collapsed .nav-section-label { opacity: 0; }

/* ── Nav toggle (Registro Actividades) ── */
.nav-item-toggle {
  width: 100%;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  color: inherit;
}
.nav-chevron {
  width: 14px;
  height: 14px;
  margin-left: auto;
  flex-shrink: 0;
  transition: transform 0.2s ease;
  color: var(--text-muted);
}
.nav-item-toggle.open .nav-chevron { transform: rotate(180deg); }

/* ── Nav group (collapsible children) ── */
.nav-group {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.25s ease;
}
.nav-group.open { max-height: 300px; }

/* ── Sub-items inside a group ── */
.nav-item-sub {
  padding-left: 1rem;
  font-size: 0.875rem;
}
.sidebar.collapsed .nav-item-sub { padding-left: 0.75rem; }

.nav-sub-prefix {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-right: 6px;
  flex-shrink: 0;
}
.sidebar.collapsed .nav-sub-prefix { display: none; }

.nav-item {
  display: flex;
  align-items: center;
  padding: 0.75rem 1rem;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  margin-bottom: 0.25rem;
  transition: all 0.2s;
  white-space: nowrap;
  position: relative;
}

.nav-item:hover, .nav-item.active {
  background-color: var(--primary-light);
  color: var(--primary-color);
  text-decoration: none;
}

.nav-icon {
  width: 20px;
  height: 20px;
  min-width: 20px;
  margin-right: 1rem;
}
.sidebar.collapsed .nav-icon { margin-right: 0; }
.sidebar.collapsed .nav-item span:not(.badge-count) { display: none; }
.sidebar.collapsed .nav-item { justify-content: center; padding: 0.75rem 0; }

.badge-count {
  background: var(--danger-color);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.1rem 0.5rem;
  border-radius: var(--radius-full);
  margin-left: auto;
}
.sidebar.collapsed .badge-count {
  position: absolute;
  top: 5px;
  right: 15px;
  padding: 0 4px;
  font-size: 10px;
}

.sidebar-footer {
  padding: 1rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  overflow: hidden;
}

.user-card {
  display: flex;
  align-items: center;
  white-space: nowrap;
}

.user-avatar {
  width: 36px;
  height: 36px;
  min-width: 36px;
  border-radius: var(--radius-full);
  background: var(--primary-color);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
}

.user-info {
  margin-left: 0.75rem;
  display: flex;
  flex-direction: column;
}
.sidebar.collapsed .user-info { display: none; }

.user-name { font-size: 0.875rem; font-weight: 600; }
.user-role-badge { font-size: 0.7rem; padding: 2px 6px; border-radius: 4px; display: inline-block; width: fit-content; margin-top: 2px; }
.role-admin, .role-administrador, .role-Administrador { background: var(--info-bg); color: var(--info-color); }
.role-Tecnico { background: var(--success-bg); color: var(--success-color); }
.role-tecnico { background: var(--success-bg); color: var(--success-color); }
.role-Colaborador, .role-colaborador { background: rgba(139,92,246,.15); color: #7c3aed; }

.btn-logout {
  color: var(--text-muted);
  padding: 0.5rem;
  border-radius: var(--radius-md);
  transition: all 0.2s;
}
.btn-logout:hover { color: var(--danger-color); background: var(--danger-bg); }
.btn-logout svg { width: 20px; height: 20px; }
.sidebar.collapsed .btn-logout { display: none; }

/* MAIN WRAPPER */
.main-wrapper {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  transition: margin-left 0.3s ease;
  display: flex;
  flex-direction: column;
}
.main-wrapper.expanded {
  margin-left: var(--sidebar-collapsed-width);
}

.top-bar {
  height: var(--header-height);
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  padding: 0 2rem;
  position: sticky;
  top: 0;
  z-index: 900;
}

.sidebar-toggle-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  margin-right: 1.5rem;
  display: flex;
  align-items: center;
}
.sidebar-toggle-btn svg { width: 24px; height: 24px; }
.sidebar-toggle-btn:hover { color: var(--text-primary); }

.page-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0;
}

.top-bar-actions {
  margin-left: auto;
  display: flex;
  gap: 1rem;
}

.content-area {
  padding: 2rem;
  flex: 1;
}

/* ==================
   COMPONENTS
   ================== */

.panel {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.panel-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0;
}

/* Dashboard Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  display: flex;
  align-items: center;
  box-shadow: var(--shadow-sm);
}

.stat-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 1.25rem;
}
.stat-icon svg { width: 28px; height: 28px; }

.stat-info { display: flex; flex-direction: column; }
.stat-label { color: var(--text-secondary); font-size: 0.875rem; font-weight: 500; }
.stat-value { font-size: 1.75rem; font-weight: 700; color: var(--text-primary); line-height: 1.2; }

.dashboard-panels {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1.5rem;
}
@media (max-width: 1024px) { .dashboard-panels { grid-template-columns: 1fr; } }

/* Forms */
.form-group { margin-bottom: 1.5rem; }
.form-label { display: block; margin-bottom: 0.5rem; font-size: 0.875rem; font-weight: 500; color: var(--text-secondary); }
.form-control {
  width: 100%;
  padding: 0.625rem 1rem;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.875rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.form-control:focus { outline: none; border-color: var(--primary-color); box-shadow: 0 0 0 3px var(--primary-light); }
textarea.form-control { resize: vertical; min-height: 100px; }
select.form-control { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2394A3B8'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 1rem center; background-size: 1em; padding-right: 2.5rem; }
.form-control:disabled, .form-control[readonly] { background-color: var(--bg-hover); opacity: 0.7; cursor: not-allowed; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
@media(max-width: 768px) { .form-row { grid-template-columns: 1fr; } }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
  text-decoration: none;
}
.btn svg { width: 18px; height: 18px; }
.btn-primary { background-color: var(--primary-color); color: white; }
.btn-primary:hover { background-color: var(--primary-hover); text-decoration: none;}
.btn-secondary { background-color: transparent; border-color: var(--border-color); color: var(--text-primary); }
.btn-secondary:hover { background-color: var(--bg-hover); text-decoration: none;}
.btn-success { background-color: var(--success-color); color: white; }
.btn-success:hover { background-color: #059669; text-decoration: none;}
.btn-danger { background-color: var(--danger-bg); color: var(--danger-color); border-color: rgba(239, 68, 68, 0.2); }
.btn-danger:hover { background-color: var(--danger-color); color: white; text-decoration: none;}
.btn-sm { padding: 0.375rem 0.75rem; font-size: 0.75rem; }

/* Tables */
.table-responsive { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; text-align: left; }
.table th { padding: 1rem; border-bottom: 1px solid var(--border-color); color: var(--text-secondary); font-weight: 600; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; background: rgba(0,0,0,0.1); }
.table td { padding: 1rem; border-bottom: 1px solid var(--border-color); vertical-align: middle; }
.table tbody tr:hover { background-color: rgba(255,255,255,0.02); }
.table tbody tr:last-child td { border-bottom: none; }

/* Badges */
.badge { display: inline-flex; align-items: center; padding: 0.25rem 0.625rem; border-radius: var(--radius-full); font-size: 0.75rem; font-weight: 600; }
.badge-success { background-color: var(--success-bg); color: var(--success-color); }
.badge-warning { background-color: var(--warning-bg); color: var(--warning-color); }
.badge-danger { background-color: var(--danger-bg); color: var(--danger-color); }
.badge-info { background-color: var(--info-bg); color: var(--info-color); }
.badge-secondary { background-color: var(--bg-hover); color: var(--text-secondary); }
.badge-outline { background: transparent; border: 1px solid var(--border-color); color: var(--text-secondary); }

.badge.green { background-color: var(--success-bg); color: var(--success-color); }
.badge.amber { background-color: var(--warning-bg); color: var(--warning-color); }
.badge.blue { background-color: var(--info-bg); color: var(--info-color); }
.badge.red { background-color: var(--danger-bg); color: var(--danger-color); }

/* Alerts / Flash Messages */
.alert { padding: 1rem; border-radius: var(--radius-md); margin-bottom: 1.5rem; display: flex; justify-content: space-between; align-items: center; border: 1px solid transparent; }
.alert-success { background-color: var(--success-bg); color: var(--success-color); border-color: rgba(16, 185, 129, 0.2); }
.alert-error { background-color: var(--danger-bg); color: var(--danger-color); border-color: rgba(239, 68, 68, 0.2); }
.alert-close { background: none; border: none; color: inherit; font-size: 1.25rem; cursor: pointer; opacity: 0.7; }
.alert-close:hover { opacity: 1; }

/* Utils */
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 0.5rem; }
.gap-4 { gap: 1rem; }
.mt-4 { margin-top: 1rem; }
.mb-4 { margin-bottom: 1rem; }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-xs { font-size: 0.75rem; line-height: 1rem; }
.text-sm { font-size: 0.875rem; line-height: 1.25rem; }
.text-success { color: var(--success-color); }
.text-danger { color: var(--danger-color); }
.font-mono { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; font-size: 0.875rem; }

/* Filter Bar */
.filter-bar { display: flex; gap: 1rem; background: var(--bg-card); padding: 1rem; border-radius: var(--radius-lg); border: 1px solid var(--border-color); margin-bottom: 1.5rem; align-items: flex-end; flex-wrap: wrap;}
.filter-bar .form-group { margin-bottom: 0; flex: 1; min-width: 200px;}