:root {
    --bg-color: #0b0f19;
    --primary-color: #00d2c4;
    --primary-hover: #00b4a6;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: rgba(0, 210, 196, 0.4); /* Borde turquesa elegante */
    --card-bg: rgba(15, 23, 42, 0.85);       /* Fondo oscuro semitransparente */
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg-color);
    background-image: 
        linear-gradient(rgba(7, 10, 18, 0.6), rgba(7, 10, 18, 0.75)), 
        url('imagenes/FONDO.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-repeat: no-repeat;
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

header {
    width: 100%;
    padding: 20px 0;
    text-align: center;
    background-color: rgba(7, 10, 18, 0.75);
    backdrop-filter: blur(10px);
}

main {
    flex: 1;
    max-width: 900px;
    margin: 30px auto;
    width: 90%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

/* 🌟 ESTILO DE LAS CAJAS FLOTANTES (REPORTES / TARJETAS) */
.report-card, .card, .container {
    background: var(--card-bg) !important;
    backdrop-filter: blur(12px);
    border: 2px solid var(--border-color) !important;
    border-radius: 16px;
    padding: 35px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.6), 0 0 15px rgba(0, 210, 196, 0.15);
    width: 100%;
    margin-bottom: 20px;
}

/* Botón llamativo estilo tecnológico */
.btn-primary {
    background-color: var(--primary-color);
    color: #070a12;
    font-weight: bold;
    padding: 12px 28px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 0 15px rgba(0, 210, 196, 0.4);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 0 25px rgba(0, 210, 196, 0.7);
    transform: translateY(-2px);
}

footer {
    width: 100%;
    padding: 15px 0;
    text-align: center;
    background-color: rgba(7, 10, 18, 0.75);
    backdrop-filter: blur(10px);
    font-size: 0.85rem;
    color: var(--text-muted);
}