/* Estilos Generales */
body {
    font-family: 'Roboto', sans-serif;
    margin: 0;
    background-color: #f0f2f5;
    color: #333;
    line-height: 1.6;
}

/* Encabezado */
header {
    background-color: #0A2A4E;
    color: #FFFFFF;
    padding: 2rem 1rem;
    border-bottom: 5px solid #F58220;
}
.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
}
.logo {
    height: 90px;
    width: auto;
    flex-shrink: 0;
}
.header-titles {
    text-align: center;
    flex-grow: 1;
    padding: 0 1rem;
}
header h1 {
    font-family: 'Montserrat', sans-serif;
    font-size: 2.5rem;
    margin: 0;
    margin-bottom: 0.5rem;
}
header h2 {
    font-family: 'Roboto', sans-serif;
    font-size: 1.3rem;
    font-weight: 400;
    margin: 0;
    opacity: 0.9;
    margin-bottom: 0.5rem;
}
header p {
    font-size: 1rem;
    margin: 0;
    opacity: 0.8;
}

/* Contenido Principal */
main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}
.parcial {
    background-color: #FFFFFF;
    margin-bottom: 2rem;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}
.parcial h2 {
    font-family: 'Montserrat', sans-serif;
    font-size: 2rem;
    color: #0A2A4E;
    border-bottom: 2px solid #F58220;
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}
.welcome-section p {
    font-size: 1.1rem;
    text-align: center;
}

/* Rejilla de Apuntes (Tomos) */
.tomo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}
.tomo-card {
    background-color: #f8f9fa;
    border: 1px solid #ddd;
    border-left: 5px solid #0A2A4E;
    padding: 1.5rem;
    border-radius: 5px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
    height: 100%;
    box-sizing: border-box;
}
.tomo-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}
.tomo-card h3 {
    font-family: 'Montserrat', sans-serif;
    margin-top: 0;
    color: #333;
}
.tomo-card p {
    margin-bottom: 0;
    font-size: 0.95rem;
}
.tomo-card.project {
    background-color: #FFF3E0;
    border-left-color: #F58220;
}
.card-link {
    text-decoration: none;
    color: inherit;
    display: flex;
}

/* Pie de Página */
footer {
    text-align: center;
    padding: 2rem 1rem;
    background-color: #343a40;
    color: #FFFFFF;
    margin-top: 2rem;
}

/* --- ESTILOS RESPONSIVOS --- */
@media (max-width: 768px) {
    header h1 { font-size: 2rem; }
    header h2 { font-size: 1.1rem; }
    .logo { height: 70px; }
    .parcial h2 { font-size: 1.8rem; }
}
@media (max-width: 480px) {
    .header-container { flex-direction: column; gap: 1rem; }
    header h1 { font-size: 1.8rem; }
    header h2 { font-size: 1rem; }
    .logo { height: 60px; }
    main { padding: 0 0.5rem; }
    .parcial { padding: 1rem; }
    .parcial h2 { font-size: 1.5rem; }
    .tomo-grid { grid-template-columns: 1fr; }
}