/* ============================================
   Guías — Biblioteca de Recursos
   Paleta: #f4f9f9 · #ffffff · #000a0c · #01d1fe · #00aab2
   ============================================ */

*,
*::before,
*::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

.gu-page {
    background-color: #f4f9f9;
    color: #000a0c;
    font-family: 'Raleway', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.gu-page img { max-width: 100%; height: auto; display: block; }
.gu-page a { text-decoration: none; color: inherit; }

/* ── Container ── */
.gu-container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ── Buttons ── */
.gu-btn {
    display: inline-block;
    background-color: #01d1fe;
    color: #000a0c;
    font-family: 'Oswald', sans-serif;
    font-weight: 700;
    font-size: 14px;
    letter-spacing: 0.10em;
    text-transform: uppercase;
    padding: 14px 36px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.25s ease, transform 0.2s ease, box-shadow 0.25s ease, color 0.25s ease;
}

.gu-btn:hover {
    background-color: #00aab2;
    color: #ffffff;
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 10px 32px rgba(1, 209, 254, 0.35);
}

.gu-btn--ghost {
    background-color: transparent;
    color: #000a0c;
    border: 2px solid #b0c4c6;
    padding: 12px 28px;
}

.gu-btn--ghost:hover {
    border-color: #01d1fe;
    color: #01d1fe;
    background-color: rgba(1, 209, 254, 0.06);
    box-shadow: 0 4px 16px rgba(1, 209, 254, 0.15);
    transform: translateY(-3px);
}

.gu-btn--small {
    font-size: 12px;
    padding: 10px 24px;
    letter-spacing: 0.08em;
}

/* ── Back link ── */
.gu-back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: #000a0c99;
    transition: color 0.2s ease, box-shadow 0.25s ease, transform 0.2s ease;
    position: fixed;
    top: 28px;
    left: 28px;
    z-index: 100;
    background: rgba(244, 249, 249, 0.9);
    backdrop-filter: blur(6px);
    padding: 8px 16px;
    border-radius: 100px;
}

.gu-back:hover {
    color: #01d1fe;
    box-shadow: 0 2px 10px rgba(1, 209, 254, 0.15);
    transform: translateX(-2px);
}

/* ══════════════════════════════════════════════
   1. HERO
   ══════════════════════════════════════════════ */
.gu-hero {
    padding: 120px 0 64px;
    text-align: center;
    background: linear-gradient(180deg, #eaf6f6 0%, #f4f9f9 100%);
}

.gu-hero__title {
    font-family: 'Oswald', sans-serif;
    font-weight: 700;
    font-size: 54px;
    line-height: 1.08;
    letter-spacing: -0.02em;
    color: #000a0c;
    margin-bottom: 18px;
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

.gu-hero__subtitle {
    font-size: 18px;
    color: #1a2e30;
    line-height: 1.7;
    max-width: 580px;
    margin: 0 auto 14px;
}

.gu-hero__text {
    font-size: 15px;
    color: #3a5456;
    line-height: 1.6;
}

/* ══════════════════════════════════════════════
   2. FILTERS
   ══════════════════════════════════════════════ */
.gu-filters {
    padding: 32px 0 48px;
    text-align: center;
}

.gu-filters__list {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

.gu-filter {
    font-family: 'Oswald', sans-serif;
    font-weight: 600;
    font-size: 13px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #3a5456;
    background: #ffffff;
    border: 1px solid #c5d8da;
    border-radius: 100px;
    padding: 10px 24px;
    cursor: pointer;
    transition: all 0.25s ease, transform 0.2s ease;
    box-shadow: 0 1px 3px rgba(0, 10, 12, 0.04);
}

.gu-filter:hover {
    color: #01d1fe;
    border-color: #01d1fe;
    background: rgba(1, 209, 254, 0.06);
    box-shadow: 0 4px 14px rgba(1, 209, 254, 0.18);
    transform: translateY(-2px);
}

.gu-filter.active {
    background: #01d1fe;
    color: #000a0c;
    border-color: #01d1fe;
    box-shadow: 0 2px 10px rgba(1, 209, 254, 0.25);
}

/* ══════════════════════════════════════════════
   3. GRID DE GUÍAS
   ══════════════════════════════════════════════ */
.gu-grid {
    padding: 0 0 80px;
}

.gu-grid__wrap {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

/* Guide card */
.gu-card {
    background: #ffffff;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid #d6e5e7;
    box-shadow: 0 2px 8px rgba(0, 10, 12, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.gu-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 56px rgba(1, 209, 254, 0.18), 0 4px 12px rgba(0, 10, 12, 0.06);
    border-color: #01d1fe;
}

.gu-card__cover {
    width: 100%;
    aspect-ratio: 4 / 5;
    object-fit: cover;
    background: #e8f5f5;
}

.gu-card__body {
    padding: 24px 24px 28px;
}

.gu-card__cat {
    display: inline-block;
    font-family: 'Oswald', sans-serif;
    font-weight: 600;
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #00aab2;
    margin-bottom: 14px;
}

/* .gu-card__title, .gu-card__desc, .gu-card__meta — removed from render */

.gu-card__actions {
    display: flex;
    gap: 10px;
}

/* Hidden card for filter */
.gu-card--hidden {
    display: none;
}

/* ══════════════════════════════════════════════
   4. CTA FINAL
   ══════════════════════════════════════════════ */
.gu-cta {
    padding: 80px 0 100px;
    text-align: center;
}

.gu-cta__title {
    font-family: 'Oswald', sans-serif;
    font-weight: 700;
    font-size: 40px;
    line-height: 1.1;
    color: #000a0c;
    margin-bottom: 16px;
}

.gu-cta__text {
    font-size: 16px;
    color: #2d4547;
    margin-bottom: 36px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

/* ── Footer ── */
.gu-footer {
    text-align: center;
    padding: 32px 0;
    font-size: 13px;
    color: #5a7a7d;
    border-top: 1px solid #d6e5e7;
}

/* ══════════════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════════════ */
@media (max-width: 768px) {
    .gu-hero { padding: 100px 0 40px; }
    .gu-hero__title { font-size: 36px; }
    .gu-hero__subtitle { font-size: 16px; }

    .gu-grid__wrap {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .gu-card__body { padding: 16px; }
    .gu-card__title { font-size: 15px; }
    .gu-card__desc { font-size: 13px; margin-bottom: 12px; }
    .gu-card__meta { font-size: 11px; margin-bottom: 12px; }
    .gu-card__actions { flex-direction: column; gap: 8px; }
    .gu-btn--small { font-size: 11px; padding: 8px 16px; text-align: center; }

    .gu-cta__title { font-size: 30px; }
    .gu-back { top: 16px; left: 16px; }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .gu-hero__title { font-size: 42px; }

    .gu-grid__wrap {
        grid-template-columns: repeat(2, 1fr);
    }
}