/* styles.css */
:root {
    /* Paleta Púrpura y Verde solicitada */
    --primary-color: #6B21A8; /* Púrpura oscuro */
    --secondary-color: #4C1D95; /* Púrpura intenso */
    --accent-color: #F3E8FF; /* Púrpura claro (fondos/tablas) */
    
    --success-color: #10B981; /* Verde esmeralda (Botones Correctos) */
    --success-hover: #059669; /* Verde oscuro (Hover) */
    
    --danger-color: #EF4444; /* Rojo para borrados/errores */
    --text-color: #1F2937; /* Texto oscuro */
    --bg-color: #F8FAFC; /* Gris muy claro de fondo */
    --white: #FFFFFF;
    
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
}

/* Header modificado: Fondo blanco para que el logo resalte */
header {
    background-color: var(--white);
    color: var(--primary-color);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    border-bottom: 3px solid var(--primary-color);
}

header .logo h2 {
    color: var(--primary-color);
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Botones en el header en modo invertido por el fondo blanco */
.header-controls .btn {
    background-color: var(--accent-color);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    font-weight: 600;
}

.header-controls .btn:hover {
    background-color: var(--primary-color);
    color: var(--white);
}

#logoutBtn {
    background: transparent;
    border: 1px solid var(--danger-color);
    color: var(--danger-color);
    padding: 5px 15px;
    border-radius: 4px;
    cursor: pointer;
    transition: 0.3s;
    font-weight: bold;
}

#logoutBtn:hover {
    background: var(--danger-color);
    color: var(--white);
}

.view-section {
    display: none;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.view-section.active {
    display: block;
    animation: fadeIn 0.4s ease-in-out;
}

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

/* Auth Login */
.login-container {
    max-width: 400px;
    margin: 100px auto;
    background: var(--white);
    padding: 2.5rem;
    border-radius: 8px;
    box-shadow: var(--card-shadow);
    border-top: 5px solid var(--primary-color);
}

.login-container h2 {
    margin-bottom: 20px;
    color: var(--primary-color);
    text-align: center;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--secondary-color);
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #CBD5E0;
    border-radius: 4px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus, .form-group select:focus {
    border-color: var(--primary-color);
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--white);
    background-color: var(--primary-color);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    text-align: center;
    transition: 0.3s;
    width: 100%;
}

.btn:hover {
    background-color: var(--secondary-color);
}

.btn-secondary { background-color: #6B7280; }
.btn-success { background-color: var(--success-color); }
.btn-success:hover { background-color: var(--success-hover); }
.btn-danger { background-color: var(--danger-color); }
.btn-danger:hover { background-color: #B91C1C; }

.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.kpi-card {
    background: var(--white);
    padding: 20px;
    border-radius: 8px;
    box-shadow: var(--card-shadow);
    border-left: 5px solid var(--primary-color);
}

.kpi-card.danger { border-left-color: var(--danger-color); }

.kpi-card h3 {
    font-size: 0.9rem;
    color: var(--text-color);
    margin-bottom: 10px;
    font-weight: 600;
}

.kpi-card .value {
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary-color);
}

.controls-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    background: var(--white);
    padding: 15px;
    border-radius: 8px;
    box-shadow: var(--card-shadow);
    flex-wrap: wrap;
    gap: 10px;
}

.grid-mediciones {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 15px;
    margin-top: 20px;
    margin-bottom: 20px;
}

.grid-mediciones input {
    text-align: center;
    font-size: 1.2rem;
    padding: 15px 10px;
}

.card {
    background: var(--white);
    border-radius: 8px;
    box-shadow: var(--card-shadow);
    padding: 20px;
    margin-bottom: 20px;
}

.chart-container {
    width: 100%;
    overflow-x: auto;
    background: var(--white);
    border-radius: 8px;
    box-shadow: var(--card-shadow);
    padding: 20px;
    margin-bottom: 30px;
}

canvas {
    max-width: 100%;
    height: 400px;
}

#toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 9999;
}

.toast {
    min-width: 250px;
    margin-top: 10px;
    padding: 15px 20px;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.3s ease-in-out;
}

.toast.show { opacity: 1; transform: translateX(0); }
.toast.error { background-color: var(--danger-color); }
.toast.success { background-color: var(--success-color); }

.flash-alert { animation: flashRed 1s infinite alternate; }
@keyframes flashRed {
    0% { background-color: var(--bg-color); }
    100% { background-color: #FCA5A5; }
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
    margin-bottom: 15px;
}

table th, table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--accent-color);
}

table th {
    background-color: var(--accent-color);
    color: var(--primary-color);
}

table tr:hover { background-color: rgba(243, 232, 255, 0.5); }

.modal {
    display: none; 
    position: fixed; 
    z-index: 1000; 
    left: 0; top: 0; width: 100%; height: 100%; 
    overflow: auto; 
    background-color: rgba(0,0,0,0.5); 
}

.modal-content {
    background-color: var(--white);
    margin: 3% auto; 
    padding: 20px;
    border-radius: 8px;
    width: 90%;
    max-width: 600px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

.close-modal {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close-modal:hover { color: var(--danger-color); }

/* Parametros Grid */
.config-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

@media (max-width: 768px) {
    header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    .header-controls {
        width: 100%;
        justify-content: space-between;
        flex-wrap: wrap;
    }
    .controls-bar {
        flex-direction: column;
        align-items: stretch;
    }
    .config-grid {
        grid-template-columns: 1fr;
    }
}