:root {
    --bg-color: #0b0c10;
    --card-bg: #1f2833;
    --text-color: #c5c6c7;
    --text-muted: #8b929a;
    --accent-blue: #ff6b00; /* Naranja Metropolis */
    --accent-blue-transparent: rgba(255, 107, 0, 0.2);
    --accent-purple: #ff007f; /* Magenta/Fucsia Metropolis */
    --accent-purple-transparent: rgba(255, 0, 127, 0.2);
    --success: #00e676;
    --danger: #ff1744;
    --border-color: rgba(255, 255, 255, 0.1);
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 250px;
    height: 100vh;
    background-color: var(--card-bg);
    border-right: 1px solid var(--border-color);
    padding: 20px 0;
    z-index: 100;
}

.brand {
    padding: 0 20px 20px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 20px;
}

.brand h2 {
    font-size: 1.5rem;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
}

.nav-menu {
    list-style: none;
}

.nav-menu li {
    margin-bottom: 5px;
}

.nav-menu a {
    display: block;
    padding: 12px 20px;
    color: var(--text-color);
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.nav-menu a:hover, .nav-menu a.active {
    background-color: rgba(255, 255, 255, 0.05);
    color: #fff;
    border-left-color: var(--accent-blue);
}

.main-content {
    margin-left: 250px;
    padding: 30px;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.header h1 {
    font-size: 2rem;
    color: #fff;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
    color: #fff;
}

.btn-primary:hover {
    box-shadow: 0 4px 15px var(--accent-blue-transparent);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--accent-blue);
    color: var(--accent-blue);
}

.btn-outline:hover {
    background: var(--accent-blue-transparent);
}

.card {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    border: 1px solid var(--border-color);
    margin-bottom: 25px;
}

/* DataTables Overrides */
.dataTables_wrapper .dataTables_filter input {
    background-color: rgba(255,255,255,0.05);
    border: 1px solid var(--border-color);
    color: #fff;
    border-radius: 6px;
    padding: 6px 12px;
    margin-left: 10px;
}

.dataTables_wrapper .dataTables_length select {
    background-color: rgba(255,255,255,0.05);
    border: 1px solid var(--border-color);
    color: #fff;
    border-radius: 6px;
    padding: 6px;
}

table.dataTable {
    border-collapse: collapse !important;
    width: 100% !important;
    color: var(--text-color);
}

table.dataTable thead th {
    border-bottom: 1px solid var(--border-color) !important;
    padding: 15px 10px;
    color: #fff;
}

table.dataTable tbody tr {
    background-color: transparent !important;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.2s;
}

table.dataTable tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.02) !important;
}

table.dataTable tbody td {
    padding: 12px 10px;
    vertical-align: middle;
}

.dataTables_wrapper .dataTables_paginate .paginate_button {
    color: var(--text-color) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: 6px;
    margin-left: 5px;
}

.dataTables_wrapper .dataTables_paginate .paginate_button.current {
    background: var(--accent-blue) !important;
    color: #000 !important;
    border-color: var(--accent-blue) !important;
}

/* Badges */
.badge {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-activo { background: rgba(255, 107, 0, 0.1); color: var(--accent-blue); border: 1px solid var(--accent-blue-transparent); }
.badge-clasificado { background: rgba(0, 230, 118, 0.1); color: var(--success); border: 1px solid rgba(0, 230, 118, 0.2); }
.badge-eliminado { background: rgba(255, 23, 68, 0.1); color: var(--danger); border: 1px solid rgba(255, 23, 68, 0.2); }

/* Switches for attendance */
.switch {
  position: relative;
  display: inline-block;
  width: 46px;
  height: 24px;
}

.switch input { 
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(255,255,255,0.1);
  transition: .4s;
  border-radius: 24px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: var(--text-muted);
  transition: .4s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--success);
}

input:checked + .slider:before {
  transform: translateX(22px);
  background-color: #fff;
}

.action-select {
    background: #ffffff !important;
    border: 1px solid var(--border-color);
    color: #000000 !important;
    padding: 5px;
    border-radius: 4px;
    font-family: 'Outfit';
    font-weight: 600;
}

.action-select option {
    background-color: #ffffff !important;
    color: #000000 !important;
}

/* Layout Eventos */
.eventos-layout {
    display: flex;
    gap: 20px;
}

/* RESPONSIVE DESIGN - CELULARES Y TABLETS */
@media (max-width: 768px) {
    .sidebar {
        position: static;
        width: 100%;
        height: auto;
        padding: 15px 10px;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .brand {
        padding: 0 0 15px 0;
        margin-bottom: 15px;
        text-align: center;
    }
    
    .nav-menu {
        display: flex;
        justify-content: space-around;
        flex-wrap: wrap;
        gap: 8px;
    }
    
    .nav-menu li {
        margin-bottom: 0;
    }
    
    .nav-menu a {
        padding: 8px 12px;
        border-left: none;
        border-bottom: 3px solid transparent;
        border-radius: 4px;
        font-size: 0.9rem;
        display: flex;
        align-items: center;
        gap: 5px;
    }
    
    .nav-menu a:hover, .nav-menu a.active {
        border-left-color: transparent;
        border-bottom-color: var(--accent-blue);
    }
    
    .main-content {
        margin-left: 0;
        padding: 15px;
    }
    
    .header {
        flex-direction: column;
        align-items: stretch;
        gap: 15px;
        text-align: center;
    }
    
    .header h1 {
        font-size: 1.6rem;
    }
    
    .header > div {
        display: flex;
        flex-direction: column;
        align-items: center;
        width: 100%;
    }
    
    /* Contenedor de filtros en participantes (index.php) */
    .header-filters {
        flex-direction: column !important;
        width: 100%;
        gap: 10px !important;
    }
    
    .header-filters select, .header-filters button {
        width: 100% !important;
        text-align: center;
    }
    
    .user-info {
        justify-content: center;
        border-top: 1px solid var(--border-color);
        padding-top: 15px;
        width: 100%;
    }
    
    .card {
        padding: 15px;
        overflow-x: auto; /* Permite scroll horizontal en las tablas en pantallas pequeñas */
    }
    
    .eventos-layout {
        flex-direction: column !important;
    }
    
    /* Módulo Importación Manual */
    .columns-container {
        flex-direction: column !important;
    }
    
    .col-box {
        width: 100% !important;
    }
    
    .col-box textarea {
        height: 150px !important; /* Más bajas en móviles */
    }
}


/* LIGHT MODE */
body.light-mode {
    --bg-color: #f0f2f5;
    --card-bg: #ffffff;
    --text-color: #1a1a1a;
    --text-muted: #6b7280;
    --border-color: rgba(0, 0, 0, 0.1);
}
body.light-mode .header h1,
body.light-mode .brand h2,
body.light-mode .nav-menu a:hover,
body.light-mode .nav-menu a.active {
    color: #000;
}
body.light-mode table.dataTable thead th {
    color: #000;
}
body.light-mode .dataTables_wrapper .dataTables_filter input,
body.light-mode .dataTables_wrapper .dataTables_length select {
    color: #000;
    background-color: #fff;
    border: 1px solid #ccc;
}
body.light-mode .btn-outline {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}
body.light-mode .btn-outline:hover {
    background: var(--accent-blue-transparent);
    color: #000;
}
body.light-mode .action-select {
    background-color: #f9f9f9 !important;
}

body.light-mode .slider {
    background-color: rgba(0,0,0,0.2);
}
body.light-mode .slider:before {
    background-color: #ffffff;
    box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}
body.light-mode input:checked + .slider {
  background-color: var(--success);
}