:root {
    --color-principal: #00a86b; /* Verde césped */
    --color-secundario: #004d40; /* Verde oscuro */
    --color-acento: #039be5; /* Azul brillante */
    --color-fondo: #f0f2f5;
    --color-texto: #333;
    --color-blanco: #fff;
    --color-correcto: #28a745;
    --color-incorrecto: #dc3545;
    --sombra-caja: 0 4px 8px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--color-secundario);
    color: var(--color-texto);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 1rem;
}

#main-app-container {
    background-image: url('background.png');
    background-size: cover;
    background-position: center;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    width: 100%;
    max-width: 800px;
}

.container {
    width: 100%;
    max-width: 800px;
    background-color: var(--color-blanco);
    border-radius: 10px;
    box-shadow: var(--sombra-caja);
    overflow: hidden;
    padding: 0;
    text-align: center;
}

.logo {
    max-width: 150px;
    margin: 0 auto 1rem auto;
    display: block;
}

h1, h2, h3 {
    font-family: 'Bebas Neue', sans-serif;
    letter-spacing: 1.5px;
    color: var(--color-secundario);
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.screen {
    display: none;
    padding: 2rem;
}

.screen.active {
    display: block;
    animation: fadeIn 0.5s ease-in-out;
}

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

.btn {
    display: inline-block;
    background-color: var(--color-principal);
    color: var(--color-blanco);
    padding: 12px 24px;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    transition: background-color 0.3s, transform 0.2s;
    margin: 0.5rem;
}

.btn:hover {
    background-color: var(--color-secundario);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: #6c757d;
}
.btn-secondary:hover {
    background-color: #5a6268;
}

.btn-danger {
    background-color: var(--color-incorrecto);
}
.btn-danger:hover {
    background-color: #c82333;
}

/* --- Pantalla de Inicio (Estilo Futbolero) --- */
#start-screen {
    background: transparent;
    color: var(--color-secundario);
}

#start-screen h1 {
    font-size: 4.5rem;
    color: var(--color-secundario);
    text-transform: uppercase;
    text-shadow: none; /* Sombra más intensa */
    -webkit-text-stroke: 0; /* Borde para legibilidad */
    text-stroke: 0;
    margin-bottom: 0.5rem;
}

#start-screen p {
    color: var(--color-secundario);
    font-size: 1.2rem;
    margin-bottom: 2rem;
    text-shadow: none; /* Sombra para legibilidad */
}

/* --- Pantalla de Inicio --- */
.settings {
    margin: 2rem 0;
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    background: rgba(0, 77, 64, 0.6); /* Verde oscuro semitransparente */
    padding: 1.5rem;
    border-radius: 10px;
}
.setting-item label {
    margin-right: 0.5rem;
    font-weight: 700;
    color: var(--color-blanco);
    font-size: 1.1rem;
}
.setting-item select {
    padding: 10px 15px;
    border-radius: 50px;
    border: 2px solid var(--color-principal);
    font-size: 1rem;
    font-weight: 700;
    background-color: var(--color-blanco);
    color: var(--color-secundario);
    cursor: pointer;
}

/* --- Pantalla de Juego --- */
.game-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-secundario);
}
.options-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}
.option-btn {
    width: 100%;
    background-color: var(--color-blanco);
    border: 2px solid var(--color-acento);
    color: var(--color-acento);
    text-align: left;
    padding: 15px;
    font-size: 1rem;
}
.option-btn:hover:not([disabled]) {
    background-color: var(--color-acento);
    color: var(--color-blanco);
}
.option-btn.correct {
    background-color: var(--color-correcto);
    border-color: var(--color-correcto);
    color: var(--color-blanco);
}
.option-btn.incorrect {
    background-color: var(--color-incorrecto);
    border-color: var(--color-incorrecto);
    color: var(--color-blanco);
}
.option-btn:disabled {
    cursor: not-allowed;
}

/* --- Pantalla de Resultados y Ranking --- */
#final-score {
    font-size: 3rem;
    color: var(--color-principal);
    margin-bottom: 1.5rem;
}
.save-score-form {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 1rem;
}
.save-score-form input {
    padding: 10px;
    font-size: 1rem;
    border: 1px solid #ccc;
    border-radius: 5px;
    width: 60%;
    max-width: 300px;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
}
th, td {
    padding: 12px;
    border-bottom: 1px solid #ddd;
}
th {
    background-color: var(--color-secundario);
    color: var(--color-blanco);
}
tr:nth-child(even) {
    background-color: #f2f2f2;
}
tr:hover {
    background-color: #ddd;
}

/* --- ADMIN --- */
.admin-container {
    max-width: 1000px;
}
.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--color-fondo);
    padding-bottom: 1rem;
}
.admin-nav {
    margin-bottom: 1.5rem;
}
.admin-nav .nav-btn {
    background-color: #eee;
    color: var(--color-texto);
}
.admin-nav .nav-btn.active {
    background-color: var(--color-principal);
    color: var(--color-blanco);
}
#admin-logo {
    max-width: 80px;
    margin-bottom: 0;
    margin-right: 1rem;
}
.admin-section {
    display: none;
    text-align: left;
}
.admin-section.active {
    display: block;
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}
.stat-card {
    background-color: #fff;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: var(--sombra-caja);
    text-align: center;
}
.stat-card h4 {
    margin-bottom: 0.5rem;
}
.stat-card p {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-principal);
    margin-bottom: 0;
}
.ai-status {
    margin-top: 1.5rem;
    padding: 1rem;
    background-color: #f0f2f5;
    border-radius: 8px;
    border-left: 5px solid var(--color-acento);
}
.ai-status p {
    margin: 0;
    line-height: 1.5;
}
.ai-status .loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(0,0,0,0.1);
    border-radius: 50%;
    border-top-color: var(--color-acento);
    animation: spin 1s ease-in-out infinite;
    margin-right: 10px;
    vertical-align: middle;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}
.admin-form {
    max-width: 500px;
    margin: 0 auto;
    text-align: left;
}
.form-group {
    margin-bottom: 1rem;
}
.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 700;
}
.form-group input[type="text"],
.form-group input[type="password"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 1rem;
}
.error-message {
    color: var(--color-incorrecto);
    margin-top: 1rem;
}
.question-item {
    background: #fff;
    padding: 1rem;
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    margin-bottom: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.question-item-text {
    flex-grow: 1;
}
.question-item-actions button {
    margin-left: 0.5rem;
    padding: 5px 10px;
}
.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.active {
    display: flex;
    justify-content: center;
    align-items: center;
}
.modal-content {
    background-color: #fefefe;
    padding: 2rem;
    border-radius: 8px;
    width: 90%;
    max-width: 600px;
    position: relative;
}
.close-btn {
    color: #aaa;
    position: absolute;
    top: 10px;
    right: 20px;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}
.alert-modal-content {
    text-align: center;
    max-width: 400px;
}
.alert-modal-content h3 {
    margin-bottom: 1rem;
    color: var(--color-secundario);
}
.alert-modal-content p {
    margin-bottom: 1.5rem;
    white-space: pre-wrap; /* Para respetar saltos de línea en el mensaje */
}
.option-group {
    display: flex;
    align-items: center;
    margin-bottom: 0.5rem;
}
.option-group input[type="radio"] {
    margin-right: 10px;
}
.form-group-inline {
    display: flex;
    gap: 1rem;
}
.form-group-inline .form-group {
    flex: 1;
}

#admin-link {
    position: fixed;
    bottom: 10px;
    left: 10px;
    width: 20px;
    height: 20px;
    background-color: rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    z-index: 9999;
    transition: background-color 0.3s ease;
}

#admin-link:hover {
    background-color: rgba(255, 255, 255, 0.7);
}


/* --- Media Queries --- */
@media (min-width: 768px) {
    .options-grid {
        grid-template-columns: 1fr 1fr;
    }
}