:root {
    --color-primario-ugel: #2C3E50;
    --color-secundario-ugel: #A93226;
    --color-acento-ugel: #f39c12;
    --color-fondo: #f4f6f9;
    --color-texto: #34495E;
    --color-blanco: #FFFFFF;
    --sombra-card: 0 6px 20px rgba(0, 0, 0, 0.08);
    --radio-borde: 12px;
}
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--color-fondo);
    color: var(--color-texto);
    line-height: 1.6;
}
.top-bar {
    background-color: var(--color-primario-ugel);
    color: rgba(255,255,255,0.8);
    font-size: 0.8rem;
    padding: 0.5rem 2rem;
    text-align: center;
}
.site-header {
    background-color: var(--color-blanco);
    padding: 1rem 2rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    border-bottom: 4px solid var(--color-secundario-ugel);
}
.header-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.header-info h1 {
    font-size: 2rem;
    color: var(--color-primario-ugel);
    margin: 0;
    font-weight: 700;
}
.header-info span {
    font-size: 1rem;
    color: #7f8c8d;
}
.logo {
    height: 80px;
    width: auto;
    transition: transform 0.3s ease;
}
.logo:hover {
    transform: scale(1.05);
}
.main-content {
    max-width: 1200px;
    margin: 2.5rem auto;
    padding: 0 20px;
}
.card {
    background: var(--color-blanco);
    border-radius: var(--radio-borde);
    box-shadow: var(--sombra-card);
    padding: 30px;
    margin-bottom: 2.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}
.intro-section {
    text-align: center;
    margin-bottom: 2.5rem;
}
.intro-section h2 {
    font-size: 2.8rem;
    color: var(--color-primario-ugel);
}
.intro-section p {
    font-size: 1.2rem;
    color: #566573;
}
.ranking-section h3 {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    text-align: center;
    font-size: 2rem;
    color: var(--color-primario-ugel);
    margin-bottom: 2rem;
}
.ranking-section h3 img {
    height: 35px;
    width: auto;
}
.ranking-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}
.ranking-card h4 {
    font-size: 1.4rem;
    color: var(--color-secundario-ugel);
    padding-bottom: 10px;
    border-bottom: 2px solid #f0f0f0;
    margin-bottom: 15px;
    font-weight: 600;
}
.ranking-list {
    list-style: none;
    padding: 0;
}
.ranking-list li {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 12px 5px;
    border-bottom: 1px solid #f0f0f0;
}
.ranking-list li:last-child {
    border-bottom: none;
}
.puesto-numero {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--color-acento-ugel);
    width: 30px;
    text-align: center;
}
.estudiante-info {
    flex-grow: 1;
}
.estudiante-info .nombre {
    display: block;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--color-primario-ugel);
}
.estudiante-info .ie {
    display: block;
    font-size: 0.8rem;
    color: #7f8c8d;
}
.puntaje {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-secundario-ugel);
}
.search-card form {
    display: flex;
    gap: 10px;
    margin-top: 1rem;
}
.search-card input[type="text"] {
    flex-grow: 1;
    padding: 12px 15px;
    border: 1px solid #ccc;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.search-card input[type="text"]:focus {
    outline: none;
    border-color: var(--color-primario-ugel);
    box-shadow: 0 0 0 3px rgba(44, 62, 80, 0.1);
}
.search-card button {
    padding: 12px 25px;
    background-color: var(--color-primario-ugel);
    color: var(--color-blanco);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: background-color 0.2s, transform 0.2s;
}
.search-card button:hover {
    background-color: #1F2D3D;
    transform: translateY(-2px);
}
#search-results {
    margin-top: 2rem;
}
.results-title {
    text-align: center;
    margin-bottom: 1rem;
    color: var(--color-primario-ugel);
}
.resultado-item {
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: var(--radio-borde);
    padding: 20px;
    margin-bottom: 1rem;
}
.resultado-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    border-bottom: 1px solid #e5e7eb;
    padding-bottom: 10px;
    margin-bottom: 10px;
}
.nombre-resultado {
    font-weight: 600;
    font-size: 1.2rem;
}
.dni-resultado {
    font-size: 0.9rem;
    color: #566573;
}
.resultado-body {
    display: flex;
    flex-direction: column;
    gap: 5px;
    font-size: 0.9rem;
}
.resultado-puntaje {
    margin-top: 15px;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 15px;
    font-weight: 600;
}
.resultado-puntaje span {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-secundario-ugel);
}
.no-results, .no-results-search {
    text-align: center;
    color: #777;
    font-style: italic;
    padding: 20px 0;
}
.site-footer {
    text-align: center;
    padding: 2rem;
    margin-top: 2rem;
    background: var(--color-primario-ugel);
    color: rgba(255,255,255,0.8);
    font-size: 0.9rem;
}
.site-footer p {
    margin: 5px 0;
}
.error-box {
    background-color: #fee2e2;
    color: #9b2c2c;
    border: 1px solid #ef4444;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
}
@media (max-width: 768px) {
    .site-header { padding: 0.5rem 1rem; }
    .header-container { flex-direction: column; text-align: center; gap: 10px; padding: 10px 0; }
    .logo { height: 60px; }
    .header-info h1 { font-size: 1.5rem; }
    .main-content { margin: 1.5rem auto; padding: 0 15px; }
    .intro-section h2 { font-size: 2rem; }
    .intro-section p { font-size: 1rem; }
    .search-card form { flex-direction: column; }
}