:root {
    --cecati-red: #8e0202;
    --cecati-blue: #0d3b66;
    --cecati-yellow: #f9c74f;
    --ink: #1f2933;
    --muted: #6b7280;
    --panel: #f4f7fb;
    --card: #ffffff;
    --border: #dfe7ef;
    --shadow: 0 14px 32px rgba(15, 23, 42, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: linear-gradient(180deg, #eef5ff 0%, #ffffff 100%);
    color: var(--ink);
}

.catalogo-shell {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem 3rem;
}

.catalogo-header {
    text-align: center;
    margin-bottom: 1.25rem;
}

.catalogo-header h1 {
    margin: 0;
    color: var(--cecati-blue);
    font-size: clamp(2rem, 4vw, 3.2rem);
}

.catalogo-header p {
    margin: .6rem 0 0;
    color: var(--muted);
    font-size: 1.05rem;
}

.filter-bar {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: .75rem;
    margin: 1.5rem 0 2rem;
}

.filter-btn {
    border: 1px solid var(--border);
    background: var(--card);
    color: var(--ink);
    padding: .7rem 1.15rem;
    border-radius: 999px;
    font-weight: 700;
    cursor: pointer;
    transition: all .2s ease;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--cecati-blue);
    border-color: var(--cecati-blue);
    color: #fff;
}

.catalogo-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.5rem;
}

.course-card {
    position: relative;
    overflow: hidden;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: var(--shadow);
    transition: transform .2s ease, box-shadow .2s ease;
    display: flex;
    flex-direction: column;
}

.course-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 18px 28px rgba(15, 23, 42, 0.12);
}

.course-image-wrap {
    position: relative;
    overflow: hidden;
    background: #e5edf7;
}

.course-image-wrap img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.35s ease;
}

.course-card:hover .course-image-wrap img {
    transform: scale(1.2);
}

.course-card.full .course-image-wrap::before {
    content: 'Curso Lleno';
    position: absolute;
    top: 50%;
    left: -30%;
    z-index: 2;
    width: 160%;
    padding: 1rem 0;
    background: rgba(255, 255, 255, 0.97);
    color: var(--cecati-red);
    border-top: 3px solid var(--cecati-red);
    border-bottom: 3px solid var(--cecati-red);
    font-weight: 800;
    letter-spacing: .1em;
    text-transform: uppercase;
    font-size: 1.35rem;
    text-align: center;
    transform: translateY(-50%) rotate(-45deg);
    text-shadow: 0 1px 0 rgba(255, 255, 255, 0.8);
    box-shadow: 0 4px 14px rgba(142, 2, 2, 0.38);
}

.course-card.full .course-image-wrap::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(142, 2, 2, 0.08), rgba(142, 2, 2, 0.22));
    pointer-events: none;
}

.course-card[data-estado="cerrado"] {
    display: none;
}

.course-body {
    padding: 1.2rem 1.2rem 1.4rem;
    display: flex;
    flex-direction: column;
    gap: .75rem;
    flex: 1;
}

.course-tag {
    display: inline-flex;
    align-self: flex-start;
    padding: .4rem .65rem;
    background: #eaf1ff;
    color: var(--cecati-blue);
    border-radius: 999px;
    font-size: .72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .04em;
}

.course-body h3 {
    margin: 0;
    font-size: 1.38rem;
    color: var(--cecati-blue);
    line-height: 1.35;
}

.course-body p {
    margin: 0;
    color: var(--muted);
    font-size: .95rem;
    line-height: 1.55;
}

.course-actions {
    margin-top: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: .8rem;
}

.course-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 0;
    background: var(--cecati-blue);
    color: #fff;
    text-decoration: none;
    border-radius: 10px;
    padding: .7rem 1rem;
    font-weight: 700;
    transition: opacity .2s ease;
}

.course-link:hover {
    opacity: .92;
}

.course-link.is-disabled {
    background: #9ca3af;
    cursor: not-allowed;
    opacity: .7;
}

.course-link.is-disabled:hover {
    opacity: .7;
}

.course-status {
    display: inline-block;
    font-size: .72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .04em;
    padding: .45rem .65rem;
    border-radius: 999px;
}

.course-status.full {
    background: rgba(142, 2, 2, 0.12);
    color: var(--cecati-red);
}

.course-status.active {
    background: rgba(46, 125, 50, 0.12);
    color: #2e7d32;
}

.course-temas {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    margin-top: auto;
    padding-top: .2rem;
}

.topic-pill {
    background: #f8f9fc;
    border: 1px solid var(--border);
    color: var(--ink);
    padding: .4rem .7rem;
    border-radius: 999px;
    font-size: .74rem;
    line-height: 1.2;
}

.empty-state {
    grid-column: 1 / -1;
    background: #fff3cd;
    border: 1px solid #ffe69c;
    color: #664d03;
    padding: 1rem 1.25rem;
    border-radius: 12px;
    font-weight: 600;
}

@media (max-width: 1000px) {
    .catalogo-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 760px) {
    .catalogo-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 560px) {
    .catalogo-grid {
        grid-template-columns: 1fr;
    }

    .catalogo-shell {
        padding-left: .75rem;
        padding-right: .75rem;
    }

    .course-image-wrap {
        aspect-ratio: 16 / 9;
    }
}