:root {
    --color-negro: #121212;
    --color-naranja: #FF5722;
    --color-gris-claro: #f5f5f5;
    --color-blanco: #ffffff;
}

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

body {
    background-color: var(--color-negro);
    color: var(--color-blanco);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    background-color: var(--color-negro);
    padding: 1.5rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.breadcrumb {
    display: flex;
    margin-bottom: 2rem;
    color: #aaa;
    flex-wrap: wrap;
}

.breadcrumb a {
    color: var(--color-naranja);
    text-decoration: none;
}

.breadcrumb span {
    margin: 0 0.5rem;
}

.subject-header {
    background-color: #1E1E1E;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    margin-bottom: 3rem;
    padding: 2rem;
}

.subject-header h1 {
    font-size: 2rem;
    color: var(--color-naranja);
    margin-bottom: 0.5rem;
}

.subject-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    color: #aaa;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.subject-description {
    margin-bottom: 1.5rem;
}

.tabs {
    display: flex;
    border-bottom: 2px solid #333;
    margin-bottom: 2rem;
}

.tab {
    padding: 1rem 2rem;
    cursor: pointer;
    transition: all 0.3s;
}

.tab.active {
    color: var(--color-naranja);
    border-bottom: 2px solid var(--color-naranja);
    margin-bottom: -2px;
}

.tab:hover:not(.active) {
    background-color: #222;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Estilos para el generador de test */
.test-generator {
    background-color: #1E1E1E;
    border-radius: 10px;
    padding: 2rem;
    margin-bottom: 3rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.generator-title {
    font-size: 1.8rem;
    color: var(--color-naranja);
    margin-bottom: 1.5rem;
    text-align: center;
}

.generator-description {
    margin-bottom: 2rem;
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.generator-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.form-label {
    font-size: 1.1rem;
    color: var(--color-blanco);
    font-weight: 500;
}

.form-description {
    font-size: 0.9rem;
    color: #aaa;
    margin-bottom: 0.5rem;
}

.theme-selection {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
    margin-top: 0.5rem;
    justify-content: center;
}

.theme-checkbox {
    display: none;
}

.theme-label {
    display: flex;
    align-items: center;
    padding: 0.8rem 1rem;
    background-color: #222;
    border-radius: 8px;
    border: 1px solid #333;
    transition: all 0.3s;
    cursor: pointer;
}

.theme-label:hover {
    background-color: #282828;
}

.theme-checkbox:checked + .theme-label {
    background-color: rgba(255, 87, 34, 0.2);
    border-color: var(--color-naranja);
}

.theme-checkbox:checked + .theme-label .theme-checkbox-icon {
    background-color: var(--color-naranja);
}

.theme-checkbox-icon {
    width: 18px;
    height: 18px;
    background-color: #333;
    border-radius: 4px;
    margin-right: 10px;
    position: relative;
    transition: background-color 0.3s;
}

.theme-checkbox:checked + .theme-label .theme-checkbox-icon::after {
    content: "✓";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--color-blanco);
    font-size: 12px;
}

.form-input {
    width: 100%;
    padding: 0.8rem 1rem;
    background-color: #222;
    border: 1px solid #333;
    border-radius: 5px;
    color: var(--color-blanco);
    font-size: 1rem;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-naranja);
}

.form-footer {
    display: flex;
    justify-content: center;
    margin-top: 1rem;
}

.form-button {
    display: inline-block;
    background-color: var(--color-naranja);
    color: var(--color-blanco);
    padding: 1rem 2rem;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.3s;
    margin-top: 1rem;
    align-self: center;
}

.form-button:hover {
    background-color: #e64a19;
    transform: translateY(-3px);
}

/* Nueva estructura de formulario centrada */
.form-row {
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 800px;
    margin: 0 auto;
}

.form-column {
    width: 100%;
    margin-bottom: 2rem;
}

footer {
    background-color: #0A0A0A;
    padding: 2rem 0;
    text-align: center;
    margin-top: auto;
}

@media (max-width: 768px) {
    .test-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .test-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .test-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
    
    .summary-cards {
        grid-template-columns: 1fr;
    }
    
    .chart {
        height: 200px;
    }
    
    .theme-selection {
        grid-template-columns: 1fr;
    }
}