:root {
    --amarillo: #cc8800;
    --amarillo-claro: #ffd700;
    --gris-oscuro: #000000;
    --exito: #006400;
    --error: #8b0000;
}

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

body {
    font-family: Arial, Helvetica, sans-serif;
    background: #ffffff;
    color: #000000;
    line-height: 1.8;
    padding: 20px;
    min-height: 100vh;
    font-size: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

header {
    text-align: center;
    padding: 30px 0;
    margin-bottom: 30px;
    background: var(--amarillo);
    color: #000000;
    border-radius: 12px;
    border: 3px solid #000000;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    font-weight: bold;
}

.section {
    background: white;
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 30px;
    border: 3px solid #000000;
}

h2 {
    color: #000000;
    border-bottom: 4px solid var(--amarillo);
    padding-bottom: 15px;
    margin-bottom: 25px;
    font-size: 2rem;
}

.input-group {
    margin-bottom: 30px;
}

label {
    display: block;
    margin-bottom: 12px;
    font-weight: bold;
    color: #000000;
    font-size: 1.3rem;
}

input {
    width: 100%;
    padding: 18px;
    border: 3px solid #000000;
    border-radius: 10px;
    font-size: 1.3rem;
}

input:focus {
    border-color: var(--amarillo);
    outline: none;
    box-shadow: 0 0 0 4px rgba(204, 136, 0, 0.5);
}

.color-notice {
    background-color: rgba(204, 136, 0, 0.2);
    padding: 15px;
    border-radius: 10px;
    margin: 25px 0;
    border: 2px solid var(--amarillo);
    font-size: 1.2rem;
    text-align: center;
}

.action-btn {
    width: 100%;
    padding: 25px;
    background: var(--amarillo);
    border: 3px solid #000000;
    border-radius: 12px;
    color: #000000;
    font-weight: bold;
    font-size: 1.5rem;
    cursor: pointer;
    margin-top: 30px;
    min-height: 80px;
}

.action-btn:hover {
    background: var(--amarillo-claro);
}

.message {
    margin-top: 30px;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    font-weight: bold;
    font-size: 1.3rem;
    border: 3px solid;
}

.success {
    background-color: rgba(0, 100, 0, 0.3);
    color: var(--exito);
    border-color: var(--exito);
}

.error {
    background-color: rgba(139, 0, 0, 0.3);
    color: var(--error);
    border-color: var(--error);
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 25px;
    margin-top: 40px;
}

.stat-card {
    background: white;
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    border: 3px solid #000000;
}

.stat-value {
    font-size: 3rem;
    font-weight: bold;
    margin: 20px 0;
    color: var(--amarillo);
}

.stat-label {
    color: #000000;
    font-weight: bold;
    font-size: 1.3rem;
}

.controls {
    display: flex;
    gap: 25px;
    margin-top: 40px;
}

.control-btn {
    flex: 1;
    padding: 25px;
    background: var(--amarillo);
    border: 3px solid #000000;
    border-radius: 12px;
    color: #000000;
    font-weight: bold;
    font-size: 1.3rem;
    cursor: pointer;
    min-height: 80px;
}

.control-btn:hover {
    background: var(--amarillo-claro);
}

footer {
    text-align: center;
    margin-top: 50px;
    padding: 30px;
    color: #000000;
    font-size: 1.2rem;
    border-top: 3px solid #000000;
    font-weight: bold;
}

@media (max-width: 768px) {
    body {
        font-size: 22px;
    }
    
    .stats {
        grid-template-columns: 1fr;
    }
    
    .controls {
        flex-direction: column;
    }
    
    h1 {
        font-size: 2.2rem;
    }
}