:root {
    --bg-main: #ffffff; /* fondo blanco */
    --card-bg: #f9fafb; /* tarjetas suaves */
    --text-main: #0f172a; /* texto principal */
    --text-muted: #6b7280; /* texto secundario */

    --primary: #1da1f2; /* azul logo */
    --primary-dark: #0b4f7c; /* azul oscuro */
    --primary-light: #38bdf8; /* azul claro */

    --border-soft: #e5e7eb; /* bordes suaves */
}

/* ===== BASE ===== */
body {
    background: var(--bg-main);
    color: var(--text-main);
    padding-bottom: 80px; /* menú mobile */
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

/* ===== CARDS ===== */
.card {
    background: var(--card-bg);
    border: 1.5px solid var(--border-soft);
    border-radius: 18px;
}

/* ===== TÍTULOS ===== */
h5, h6 {
    font-weight: 800;
    color: var(--primary-dark);
}

/* ===== LABELS ===== */
label {
    font-weight: 700;
    color: var(--primary-dark);
}

/* ===== INPUTS ===== */
input.form-control {
    background: #ffffff;
    color: var(--text-main);
    font-size: 1.2rem;
    font-weight: 700;
    border-radius: 12px;
    border: 2px solid var(--border-soft);
}

    input.form-control:focus {
        border-color: var(--primary);
        box-shadow: 0 0 0 2px rgba(29,161,242,0.25);
    }

/* Placeholder */
::placeholder {
    color: #9ca3af;
}

/* ===== BOTÓN PRINCIPAL ===== */
.btn-primary {
    background: var(--primary);
    color: #ffffff;
    font-size: 1.2rem;
    font-weight: 800;
    border-radius: 14px;
    border: none;
}

    .btn-primary:hover {
        background: var(--primary-dark);
    }

/* ===== BOTÓN SALIR ===== */
.btn-outline-light {
    color: var(--primary-dark);
    border: 2px solid var(--primary-dark);
    font-weight: 700;
}

    .btn-outline-light:hover {
        background: var(--primary-dark);
        color: #ffffff;
    }

/* ===== LISTADO ===== */
.list-group-item {
    cursor: pointer;
    font-weight: 700;
    border: 1px solid var(--border-soft);
}

    .list-group-item:hover {
        background: var(--primary-light);
        color: #ffffff;
    }

/* ===== MENU MOBILE ===== */
.mobile-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 68px;
    background: #ffffff;
    display: flex;
    border-top: 2px solid var(--border-soft);
    z-index: 9999;
}

    .mobile-nav a {
        flex: 1;
        text-decoration: none;
        color: var(--primary-dark);
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        font-size: 1.2rem;
        font-weight: 800;
    }

        .mobile-nav a span {
            font-size: 0.75rem;
            margin-top: 2px;
        }

        .mobile-nav a.active {
            background: var(--primary);
            color: #ffffff;
        }

/* ===== ÚLTIMOS INGRESADOS ===== */
.ultimo-item {
    background: #ffffff;
    color: var(--primary-dark);
    font-weight: 700;
    border-left: 6px solid var(--primary);
}

    /* Hover (feedback táctil) */
    .ultimo-item:hover {
        background: var(--primary-light);
        color: #ffffff;
    }


/* Desktop: ocultar menú */
/*@media (min-width: 768px) {
    .mobile-nav {
        display: none;
    }
}*/