/*
|--------------------------------------------------------------------------
| Configuración general
|--------------------------------------------------------------------------
*/

:root {
    --book-color: #1769aa;
    --text-color: #172033;
    --secondary-text: #617087;
    --surface-color: rgba(255, 255, 255, 0.96);
    --soft-background: #f7faff;
    --border-color: #dce5ef;
    --shadow-color: rgba(16, 43, 76, 0.18);
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
    background:
        linear-gradient(
            145deg,
            var(--book-color) 0%,
            #ffffff 78%
        );
    background-attachment: fixed;
    background-size: cover;
}

body {
    min-height: 100vh;
    margin: 0;
    padding: 32px 18px;
    color: var(--text-color);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 16px;
}

.resources-page {
    width: min(1120px, 100%);
    margin: 0 auto;
}


/*
|--------------------------------------------------------------------------
| Encabezado
|--------------------------------------------------------------------------
*/

.site-header {
    display: flex;
    justify-content: center;
    min-height: 100px;
}

.site-logo {
    display: block;
    /* width: 150px; */
    max-width: 280px;
    height: auto;
    margin: 0 auto 26px;
    object-fit: contain;
}


/*
|--------------------------------------------------------------------------
| Panel principal
|--------------------------------------------------------------------------
*/

.resources-panel {
    padding: 32px;
    border: 1px solid rgba(255, 255, 255, 0.75);
    border-radius: 24px;
    background: var(--surface-color);
    box-shadow: 0 20px 55px var(--shadow-color);
    backdrop-filter: blur(8px);
}

.panel-heading {
    margin-bottom: 28px;
    text-align: center;
}

.resource-label {
    display: inline-block;
    margin-bottom: 10px;
    padding: 6px 12px;
    border-radius: 999px;
    background: color-mix(
        in srgb,
        var(--book-color) 14%,
        white
    );
    color: var(--book-color);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.panel-heading h1 {
    margin: 0 0 8px;
    color: var(--text-color);
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    line-height: 1.15;
}

.unit-name {
    margin: 0 0 8px;
    color: var(--book-color);
    font-size: 15px;
    font-weight: 700;
}

.resource-instructions {
    margin: 0;
    color: var(--secondary-text);
    font-size: 16px;
    line-height: 1.5;
}


/*
|--------------------------------------------------------------------------
| Cuadrícula de recursos
|--------------------------------------------------------------------------
*/

.resource-grid {
    display: grid;
    grid-template-columns: repeat(
        auto-fit,
        minmax(min(100%, 260px), 1fr)
    );
    gap: 24px;
}


/*
|--------------------------------------------------------------------------
| Tarjeta individual
|--------------------------------------------------------------------------
*/

.resource-card {
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow: hidden;
    border: 1px solid var(--border-color);
    border-radius: 18px;
    background: #ffffff;
    box-shadow: 0 12px 25px rgba(16, 43, 76, 0.12);
    transition:
        transform 180ms ease,
        border-color 180ms ease,
        box-shadow 180ms ease;
}

.resource-card:hover {
    transform: translateY(-4px);
    border-color: var(--book-color);
    box-shadow: 0 18px 35px rgba(16, 43, 76, 0.18);
}


/*
|--------------------------------------------------------------------------
| Portada individual
|--------------------------------------------------------------------------
*/

.cover-column {
    display: flex;
    justify-content: center;
    padding: 20px 20px 0;
}

.book-cover {
    display: block;
    width: 100%;
    max-width: 235px;
    height: auto;
    border-radius: 10px;
    object-fit: contain;
    box-shadow: 0 12px 25px rgba(10, 31, 56, 0.22);
}


/*
|--------------------------------------------------------------------------
| Información y botón
|--------------------------------------------------------------------------
*/

.resource-information {
    display: flex;
    flex: 1;
    flex-direction: column;
    padding: 20px;
}

.resource-information h2 {
    margin: 0 0 18px;
    color: var(--text-color);
    font-size: 17px;
    line-height: 1.4;
    overflow-wrap: anywhere;
}

.download-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    min-height: 52px;
    margin-top: auto;
    padding: 10px 16px;
    border: 1px solid var(--book-color);
    border-radius: 12px;
    background: var(--soft-background);
    color: var(--text-color);
    font-size: 15px;
    font-weight: 700;
    text-decoration: none;
    transition:
        color 160ms ease,
        background-color 160ms ease,
        box-shadow 160ms ease;
}

.download-icon {
    display: grid;
    place-items: center;
    flex: 0 0 34px;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--book-color);
    color: #ffffff;
    font-size: 18px;
}

.download-link:hover {
    background: var(--book-color);
    color: #ffffff;
    box-shadow: 0 8px 18px rgba(18, 61, 105, 0.16);
}

.download-link:hover .download-icon {
    background: #ffffff;
    color: var(--book-color);
}

.download-link:focus-visible {
    outline: 3px solid color-mix(
        in srgb,
        var(--book-color) 30%,
        transparent
    );
    outline-offset: 3px;
}


/*
|--------------------------------------------------------------------------
| Mensaje sin recursos
|--------------------------------------------------------------------------
*/

.empty-message {
    padding: 24px;
    border: 1px dashed var(--border-color);
    border-radius: 14px;
    background: var(--soft-background);
    color: var(--secondary-text);
    font-size: 16px;
    line-height: 1.5;
    text-align: center;
}


/*
|--------------------------------------------------------------------------
| Pie de página
|--------------------------------------------------------------------------
*/

.site-footer {
    display: flex;
    justify-content: center;
}

.editorial-logo {
    display: block;
    width: 54px;
    height: auto;
    margin: 28px auto 0;
    object-fit: contain;
}


/*
|--------------------------------------------------------------------------
| Tabletas
|--------------------------------------------------------------------------
*/

@media (max-width: 800px) {
    .resources-panel {
        padding: 26px 22px;
    }

    .resource-grid {
        grid-template-columns: repeat(
            2,
            minmax(0, 1fr)
        );
    }
}


/*
|--------------------------------------------------------------------------
| Celulares
|--------------------------------------------------------------------------
*/

@media (max-width: 560px) {
    body {
        padding: 22px 14px;
    }

    .site-header {
        min-height: 85px;
    }

    .site-logo {
        width: 130px;
        margin-bottom: 20px;
    }

    .resources-panel {
        padding: 22px 16px;
        border-radius: 20px;
    }

    .panel-heading {
        margin-bottom: 22px;
    }

    .resource-grid {
        grid-template-columns: 1fr;
    }

    .resource-card {
        display: grid;
        grid-template-columns: 110px minmax(0, 1fr);
    }

    .cover-column {
        align-items: center;
        padding: 14px 0 14px 14px;
    }

    .book-cover {
        max-width: 110px;
    }

    .resource-information {
        justify-content: center;
        padding: 14px;
    }

    .resource-information h2 {
        margin-bottom: 12px;
        font-size: 14px;
    }

    .download-link {
        min-height: 46px;
        padding: 8px 10px;
        font-size: 14px;
    }

    .download-icon {
        flex-basis: 30px;
        width: 30px;
        height: 30px;
    }
}


/*
|--------------------------------------------------------------------------
| Celulares muy pequeños
|--------------------------------------------------------------------------
*/

@media (max-width: 380px) {
    body {
        padding-inline: 10px;
    }

    .resource-card {
        grid-template-columns: 90px minmax(0, 1fr);
    }

    .cover-column {
        padding-left: 10px;
    }

    .book-cover {
        max-width: 90px;
    }

    .download-text {
        font-size: 13px;
    }
}