/* ===================================
   TEMA OSCURO ELEGANTE CON GRISES
   =================================== */

:root {
    /* Colores principales - Escala de grises */
    --dark-bg: #1a1a1a;           /* Fondo muy oscuro */
    --dark-secondary: #2d2d2d;    /* Fondo secundario */
    --dark-tertiary: #3a3a3a;     /* Fondo terciario */
    --dark-hover: #454545;        /* Hover */
    --dark-border: #404040;       /* Bordes */
    
    /* Textos */
    --text-primary: #f5f5f5;      /* Texto principal */
    --text-secondary: #b0b0b0;    /* Texto secundario */
    --text-muted: #808080;        /* Texto débil */
    
    /* Colores de énfasis */
    --accent-primary: #00d9ff;    /* Cyan brillante */
    --accent-secondary: #7c3aed;  /* Púrpura */
    --accent-success: #10b981;    /* Verde */
    --accent-warning: #f59e0b;    /* Naranja */
    --accent-danger: #ef4444;     /* Rojo */
}

/* Body y fondo general */
body {
    background-color: var(--dark-bg);
    color: var(--text-primary);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    overflow-x: hidden;
}

/* Scrollbar personalizada */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--dark-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--dark-tertiary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--dark-hover);
}

/* ===================================
   NAVBAR
   =================================== */

.navbar {
    background: linear-gradient(135deg, var(--dark-secondary) 0%, var(--dark-tertiary) 100%) !important;
    border-bottom: 2px solid var(--dark-border) !important;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5) !important;
}

.navbar-brand {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--accent-primary) !important;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.navbar-brand i {
    margin-right: 8px;
    color: var(--accent-primary);
}

.nav-link {
    color: var(--text-secondary) !important;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--accent-primary) !important;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-primary);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

/* ===================================
   CARDS
   =================================== */

.card {
    background-color: var(--dark-secondary);
    border: 1px solid var(--dark-border);
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.5);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.card-header {
    background: linear-gradient(135deg, var(--dark-tertiary) 0%, var(--dark-hover) 100%) !important;
    border-bottom: 2px solid var(--dark-border);
    border-radius: 11px 11px 0 0;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.card-header.bg-primary {
    background: linear-gradient(135deg, #1a5a7a 0%, #0d8aa8) !important;
}

.card-header.bg-info {
    background: linear-gradient(135deg, #0a5a6f 0%, #00838f) !important;
}

.card-header.bg-success {
    background: linear-gradient(135deg, #065f46 0%, #059669) !important;
}

.card-body {
    background-color: var(--dark-secondary);
    color: var(--text-primary);
}

/* ===================================
   BOTONES
   =================================== */

.btn {
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, #0d8aa8 0%, #0a6a8f);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #0f9dc0 0%, #0d8aa8);
    box-shadow: 0 4px 15px rgba(13, 170, 184, 0.4);
    transform: translateY(-2px);
}

.btn-success {
    background: linear-gradient(135deg, #059669 0%, #047857);
    color: white;
}

.btn-success:hover {
    background: linear-gradient(135deg, #10b981 0%, #059669);
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
    transform: translateY(-2px);
}

.btn-warning {
    background: linear-gradient(135deg, #d97706 0%, #b45309);
    color: white;
}

.btn-warning:hover {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706);
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.4);
}

.btn-danger {
    background: linear-gradient(135deg, #dc2626 0%, #b91c1c);
    color: white;
}

.btn-danger:hover {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626);
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.4);
}

.btn-info {
    background: linear-gradient(135deg, #0891b2 0%, #0e7490);
    color: white;
}

.btn-info:hover {
    background: linear-gradient(135deg, #06b6d4 0%, #0891b2);
    box-shadow: 0 4px 15px rgba(6, 182, 212, 0.4);
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.875rem;
}

/* ===================================
   INPUTS Y FORMULARIOS
   =================================== */

.form-control,
.form-select,
textarea {
    background-color: var(--dark-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--dark-border);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.form-control:focus,
.form-select:focus,
textarea:focus {
    background-color: var(--dark-tertiary);
    color: var(--text-primary);
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 0.2rem rgba(0, 217, 255, 0.25);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-label {
    color: var(--text-secondary);
    font-weight: 500;
}

/* ===================================
   TABLAS
   =================================== */

.table {
    color: var(--text-primary);
    border-color: var(--dark-border);
}

.table thead {
    background-color: var(--dark-tertiary);
    color: var(--text-secondary);
}

.table-light {
    background-color: var(--dark-tertiary) !important;
}

.table tbody tr {
    border-bottom: 1px solid var(--dark-border);
    transition: background-color 0.2s ease;
}

.table tbody tr:hover {
    background-color: var(--dark-hover);
}

.table tbody td {
    color: var(--text-primary);
    vertical-align: middle;
}

/* ===================================
   BADGES
   =================================== */

.badge {
    border-radius: 6px;
    padding: 0.4rem 0.8rem;
    font-weight: 600;
    font-size: 0.75rem;
}

.badge.bg-secondary {
    background-color: var(--dark-hover) !important;
    color: var(--text-secondary);
    border: 1px solid var(--dark-border);
}

.badge.bg-primary {
    background-color: rgba(13, 170, 184, 0.2) !important;
    color: #0d8aa8;
    border: 1px solid rgba(13, 170, 184, 0.3);
}

.badge.bg-success {
    background-color: rgba(16, 185, 129, 0.2) !important;
    color: #10b981;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge.bg-info {
    background-color: rgba(6, 182, 212, 0.2) !important;
    color: #06b6d4;
    border: 1px solid rgba(6, 182, 212, 0.3);
}

/* ===================================
   ALERTAS
   =================================== */

.alert {
    border-radius: 10px;
    border: 1px solid transparent;
    background-color: var(--dark-tertiary);
    color: var(--text-primary);
}

.alert-warning {
    background-color: rgba(245, 158, 11, 0.1) !important;
    border-color: rgba(245, 158, 11, 0.3) !important;
    color: #fbbf24 !important;
}

.alert-info {
    background-color: rgba(6, 182, 212, 0.1) !important;
    border-color: rgba(6, 182, 212, 0.3) !important;
    color: #22d3ee !important;
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.1) !important;
    border-color: rgba(16, 185, 129, 0.3) !important;
    color: #6ee7b7 !important;
}

.alert-danger {
    background-color: rgba(239, 68, 68, 0.1) !important;
    border-color: rgba(239, 68, 68, 0.3) !important;
    color: #fca5a5 !important;
}

/* ===================================
   MODALES
   =================================== */

.modal-content {
    background-color: var(--dark-secondary);
    border: 1px solid var(--dark-border);
    border-radius: 12px;
}

.modal-header {
    background: linear-gradient(135deg, var(--dark-tertiary) 0%, var(--dark-hover) 100%);
    border-bottom: 2px solid var(--dark-border);
    color: var(--text-primary);
}

.modal-header .modal-title {
    font-weight: 600;
    letter-spacing: 0.5px;
}

.modal-body {
    background-color: var(--dark-secondary);
    color: var(--text-primary);
}

.modal-footer {
    background-color: var(--dark-tertiary);
    border-top: 1px solid var(--dark-border);
}

.btn-close {
    filter: invert(1) brightness(1.2);
}

/* ===================================
   SPINNERS Y LOADERS
   =================================== */

.spinner-border {
    color: var(--accent-primary);
    border-color: var(--dark-hover);
    border-right-color: var(--accent-primary);
}

/* ===================================
   FONDOS Y ESTILOS ESPECIALES
   =================================== */

.bg-primary {
    background: linear-gradient(135deg, #1a5a7a 0%, #0d8aa8) !important;
}

.bg-info {
    background: linear-gradient(135deg, #0a5a6f 0%, #00838f) !important;
}

.bg-success {
    background: linear-gradient(135deg, #065f46 0%, #059669) !important;
}

.bg-dark {
    background-color: var(--dark-secondary) !important;
}

.text-muted {
    color: var(--text-muted) !important;
}

.text-secondary {
    color: var(--text-secondary) !important;
}

.text-light {
    color: var(--text-primary) !important;
}

.border {
    border-color: var(--dark-border) !important;
}

.border-bottom {
    border-bottom-color: var(--dark-border) !important;
}

/* ===================================
   ESTILOS ADICIONALES
   =================================== */

.container-fluid {
    background-color: var(--dark-bg);
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    font-weight: 600;
    letter-spacing: 0.5px;
}

h1 {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--dark-border);
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #00ffff;
    text-decoration: underline;
}

footer {
    background-color: var(--dark-secondary);
    border-top: 1px solid var(--dark-border);
    color: var(--text-muted);
    padding: 0.75rem 0;
    font-size: 0.85rem;
    margin-top: auto;
}

footer.sticky-bottom {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 100;
    box-shadow: 0 -4px 15px rgba(0, 0, 0, 0.3);
}

footer a {
    color: var(--accent-primary);
    text-decoration: none;
}

footer a:hover {
    color: #00ffff;
    text-decoration: underline;
}

footer small {
    font-size: 0.8rem;
    display: block;
}

/* ===================================
   TARJETAS DE PROYECTOS
   =================================== */

.list-group-item {
    background-color: var(--dark-secondary);
    border-color: var(--dark-border);
    color: var(--text-primary);
}

.list-group-item.list-group-item-action {
    transition: all 0.3s ease;
}

.list-group-item.list-group-item-action:hover {
    background-color: var(--dark-hover);
    border-color: var(--accent-primary);
}

/* ===================================
   ESTILOS DE FLEX Y LAYOUT
   =================================== */

.d-flex {
    display: flex;
}

.flex-wrap {
    flex-wrap: wrap;
}

.gap-2 {
    gap: 0.5rem;
}

/* ===================================
   RESPONSIVE
   =================================== */

@media (max-width: 768px) {
    .card {
        margin-bottom: 1rem;
    }

    .btn-group {
        display: flex;
        gap: 0.25rem;
    }

    .table {
        font-size: 0.875rem;
    }
}

/* ===================================
   ANIMACIONES
   =================================== */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    animation: fadeIn 0.3s ease;
}

.modal-content {
    animation: fadeIn 0.3s ease;
}

/* ===================================
   EFECTO GLOW EN ELEMENTOS
   =================================== */

.btn:not(.btn-secondary):hover {
    text-shadow: 0 0 10px rgba(0, 217, 255, 0.5);
}

.navbar-brand:hover {
    text-shadow: 0 0 20px rgba(0, 217, 255, 0.6);
}

/* ===================================
   INPUTS CON FOCUS
   =================================== */

.form-control:focus,
.form-select:focus {
    outline: none;
}

textarea.form-control:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 0.2rem rgba(0, 217, 255, 0.25);
}

/* ===================================
   EFFECT PARA PROYECTOS
   =================================== */

.card.flex-grow-1 {
    border: 1px solid var(--dark-border);
    transition: all 0.3s ease;
}

.card.flex-grow-1:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 4px 20px rgba(0, 217, 255, 0.2);
}