/* Estructura general con Flexbox (Escritorio grande > 1200px) */
body {
    display: flex;
    min-height: 100vh;
    margin: 0;
    background-color: #f8fafc;
    font-family: system-ui, -apple-system, sans-serif;
}

aside {
    width: 260px;
    background-color: #1e3a8a;
    color: white;
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: width 0.3s ease, padding 0.3s ease;
    box-sizing: border-box;
    position: relative;
}

main {
    flex-grow: 1;
    padding: 30px;
    overflow-x: auto;
    box-sizing: border-box;
    min-width: 0;
}

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

.sidebar-title {
    font-size: 18px;
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    transition: opacity 0.2s ease;
}

.collapse-btn {
    background: rgba(255, 255, 255, 0.15);
    border: none;
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: background 0.2s;
    flex-shrink: 0;
}

.collapse-btn:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* Enlaces del menú con iconos */
aside nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

aside nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    color: #e2e8f0;
    text-decoration: none;
    padding: 10px 12px;
    border-radius: 6px;
    transition: background 0.2s, color 0.2s;
    white-space: nowrap;
    overflow: hidden;
}

aside nav a:hover, aside nav a.active {
    background-color: #2563eb;
    color: white;
}

.nav-icon {
    font-size: 18px;
    min-width: 24px;
    text-align: center;
    flex-shrink: 0;
}

.nav-text {
    transition: opacity 0.2s ease;
}

/* Estado Colapsado (Mini-barra lateral de 65px con iconos clicables en Escritorio) */
body.sidebar-collapsed aside {
    width: 65px !important;
    padding: 20px 10px !important;
}

body.sidebar-collapsed .sidebar-title,
body.sidebar-collapsed .nav-text {
    opacity: 0;
    pointer-events: none;
    display: none;
}

body.sidebar-collapsed .sidebar-header {
    justify-content: center;
    margin-bottom: 20px;
}

body.sidebar-collapsed aside nav a {
    justify-content: center;
    padding: 12px 0;
}

/* Tarjetas y formularios generales */
.card {
    background: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-weight: 500;
    font-size: 13px;
    color: #475569;
}

.form-group input, .form-group select {
    padding: 8px 12px;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    font-size: 14px;
    width: 100%;
    box-sizing: border-box;
}

button {
    background-color: #2563eb;
    color: white;
    border: none;
    padding: 10px 16px;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
}

button:hover {
    background-color: #1d4ed8;
}

button.danger {
    background-color: #dc2626;
}
button.danger:hover {
    background-color: #b91c1c;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
    font-size: 14px;
}

th {
    background-color: #f1f5f9;
    font-weight: 600;
    color: #334155;
}

/* Responsive para pantallas medianas, tablets y portátiles (<= 1200px) */
@media (max-width: 1200px) {
    body {
        flex-direction: column;
    }
    aside {
        width: 100% !important;
        height: auto;
        display: flex !important;
        opacity: 1 !important;
        pointer-events: auto !important;
    }
    .collapse-btn {
        display: none !important;
    }
    .sidebar-title {
        opacity: 1 !important;
        display: block !important;
    }
    .nav-text {
        opacity: 1 !important;
        display: inline !important;
    }
    aside nav {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 6px;
    }
    aside nav a {
        padding: 8px 12px;
        font-size: 13px;
    }
    .sidebar-header {
        margin-bottom: 12px;
    }
}