* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --colorFondo1: #1E3C72;
    --colorFondo2: #2A5298;

    --colorGradiente: linear-gradient(135deg, var(--colorFondo1) 0%, var(--colorFondo2) 100%);

    --colorValido: #71D674;
    --colorInvalido: #F44336;

    --fondoValido: #4caf504d;
    --fondoInvalido: #f443364d;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--colorGradiente);
    color: #fff;
    padding: 20px;
    min-height: 100vh;
}

.contenedor {
    max-width: 1400px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

h1 {
    text-align: center;
    margin-bottom: 10px;
    font-size: 2.5em;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.subtitulo {
    text-align: center;
    margin-bottom: 15px;
    opacity: 0.9;
    font-size: 1.1em;
}

.infoPiloto {
    text-align: center;
    margin-bottom: 25px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 10px;
    font-size: 1.05em;
    border: 2px solid rgba(113, 214, 116, 0.3);
}

.controles {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
    background: rgba(255, 255, 255, 0.05);
    padding: 20px;
    border-radius: 15px;
}

.grupoControl {
    display: flex;
    flex-direction: column;
}

.grupoControl label {
    margin-bottom: 12px;
    font-weight: 600;
    font-size: 0.9em;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.grupoBotones {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.botonModoEntrada,
.botonValidador,
.botonSalida {
    padding: 12px 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    font-size: 0.95em;
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.botonModoEntrada:hover,
.botonValidador:hover,
.botonSalida:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.botonModoEntrada.activo,
.botonValidador.activo,
.botonSalida.activo {
    background: var(--colorValido);
    border-color: var(--colorValido);
    color: #fff;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(113, 214, 116, 0.4);
}

select,
input,
button {
    padding: 12px;
    border: none;
    border-radius: 8px;
    font-size: 1em;
}

input,
select {
    background: rgba(255, 255, 255, 0.9);
    color: #333;
    border: 2px solid transparent;
    transition: border-color 0.3s ease;
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--colorValido);
}

option {
    background: rgba(30, 60, 114, 0.9);
    color: #fff;
    padding: 10px;
}

button {
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
}

button:hover {
    transform: translateY(-2px);
}

button:active {
    transform: translateY(0);
}

.seccionFormulario {
    background: rgba(255, 255, 255, 0.08);
    padding: 25px;
    border-radius: 15px;
    margin-bottom: 25px;
}

.seccionFormulario h2 {
    margin-bottom: 20px;
    color: var(--colorValido);
    font-size: 1.5em;
}

.rejillaFormulario {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.campoFormulario {
    display: flex;
    flex-direction: column;
}

.campoFormulario label {
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 0.95em;
}

.campoFormulario input,
.campoFormulario select {
    padding: 12px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    border-radius: 8px;
}

.campoFormulario input::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

#entradaReducida,
#entradaExtendida {
    display: none;
}

.seccionAnalisis {
    text-align: center;
    margin: 30px 0;
    display: flex;
    gap: 20px;
    justify-content: center;
}

#botonAnalizar {
    padding: 15px 50px;
    font-size: 1.2em;
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 100%);
    color: white;
    letter-spacing: 1px;
    text-transform: uppercase;
}

#botonAnalizar:hover {
    box-shadow: 0 5px 20px rgba(255, 107, 107, 0.5);
}

#botonLimpiar {
    padding: 15px 50px;
    font-size: 1.2em;
    background: linear-gradient(135deg, #f7b731 0%, #f39c12 100%);
    color: white;
    letter-spacing: 1px;
    text-transform: uppercase;
}

#botonLimpiar:hover {
    box-shadow: 0 5px 20px rgba(247, 183, 49, 0.5);
}

.seccionResultados {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 25px;
}

#resultadoValidacion,
#salidaAmericana,
#salidaEuropea {
    display: none;
    background: rgba(255, 255, 255, 0.1);
    padding: 25px;
    border-radius: 15px;
    animation: aparecer 0.5s ease;
}

@keyframes aparecer {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.resultado {
    text-align: center;
    padding: 20px;
    border-radius: 10px;
    display: flex;
    justify-content: center;
    flex-direction: column;
    height: -webkit-fill-available;
}

.resultado.valido {
    background: var(--fondoValido);
    border: 2px solid var(--colorValido);
}

.resultado.invalido {
    background: var(--fondoInvalido);
    border: 2px solid var(--colorInvalido);
}

.emoticono {
    font-size: 4em;
    display: block;
    margin-bottom: 15px;
}

.resultado p {
    font-size: 1.1em;
    margin: 10px 0;
}

.resultado small {
    opacity: 0.8;
}

input.error,
select.error {
    border-color: var(--colorInvalido);
    background-color: var(--fondoInvalido);
}

#salidaAmericana h3,
#salidaEuropea h3 {
    color: var(--colorValido);
    margin-bottom: 20px;
    text-align: center;
    font-size: 1.5em;
}

#salidaAmericana p,
#salidaEuropea p {
    padding: 8px;
    margin: 8px 0;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 5px;
    border-left: 3px solid var(--colorValido);
}

#salidaAmericana strong,
#salidaEuropea strong {
    color: var(--colorValido);
    margin-right: 10px;
}

@media (max-width: 768px) {
    .contenedor {
        padding: 15px;
    }

    h1 {
        font-size: 1.8em;
    }

    .controles {
        grid-template-columns: 1fr;
    }

    .rejillaFormulario {
        grid-template-columns: 1fr;
    }

    .seccionResultados {
        grid-template-columns: 1fr;
    }
    
    .seccionAnalisis {
        flex-direction: column;
    }
}