/* ═══════════════════════════════════════════════════════════
   PÁGINA MATERIAIS — Reciprocidalismo
   ═══════════════════════════════════════════════════════════ */

/* ── HERO ── */
.materiais-hero {
    padding: 7rem 0 4rem;
    text-align: center;
}

.materiais-hero-inner {
    max-width: 640px;
    margin: 0 auto;
}

.materiais-hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2.25rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: var(--color-primary);
    margin: var(--s-3) 0 var(--s-5);
    margin-bottom: 10px;
}

.materiais-hero-desc {
    font-size: var(--fs-base);
    line-height: var(--lh-relaxed);
    color: var(--color-text-soft);
    margin: 0;
}

/* ── FILTROS + BUSCA ── */
.materiais-filters-wrap {
    padding: 0 0 var(--s-8);
    margin-bottom: var(--s-8);
    position: relative;
    z-index: 30;
}

.materiais-filters-layout {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--s-5);
}

/* ── BUSCA ── */
.materiais-search-wrap {
    flex-shrink: 0;
}

.materiais-search {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--color-bg-cream);
    border: 1.5px solid var(--color-line-soft);
    border-radius: var(--radius);
    padding: 0 0.75rem;
    min-width: 400px;
    transition: border-color var(--dur-fast) var(--ease-out);
}

.materiais-search:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(27, 54, 41, 0.1);
}

.materiais-search svg {
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.materiais-search-input {
    border: none;
    background: transparent;
    outline: none;
    padding: 0.55rem 0.6rem;
    font-family: var(--font-sans);
    font-size: var(--fs-sm);
    color: var(--color-text);
    width: 100%;
    min-width: 0;
}

.materiais-search-input::placeholder {
    color: var(--color-text-muted);
}

.materiais-search-clear {
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 0 0.25rem;
    line-height: 1;
    transition: color var(--dur-fast) var(--ease-out);
}

.materiais-search-clear:hover {
    color: var(--color-primary);
}

/* ── FILTROS ── */
.materiais-filters {
    display: flex;
    align-items: flex-start;
    gap: var(--s-4);
    flex-wrap: wrap;
    position: relative;
}

.materiais-filter-group {
    display: flex;
    align-items: center;
    gap: var(--s-3);
    flex-wrap: wrap;
    position: relative;
}

.materiais-filter-pills {
    display: flex;
    align-items: center;
    gap: var(--s-2);
    flex-wrap: wrap;
}

/* Botão de filtro */
.materiais-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.45rem 1rem;
    font-family: var(--font-sans);
    font-size: var(--fs-xs);
    font-weight: 500;
    color: var(--color-text-soft);
    background: #ffffffcc;
    border: 1px solid var(--color-line-soft);
    border-radius: 8px;
    text-decoration: none;
    white-space: nowrap;
    cursor: pointer;
    transition: all var(--dur-fast) var(--ease-out);
}

.materiais-pill:hover {
    color: var(--color-primary);
    border-color: var(--color-line-strong);
    background: var(--color-surface-alt);
}

.materiais-pill.is-active {
    color: var(--color-bg-cream);
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.materiais-pill.is-active:hover {
    background: var(--color-primary-800);
    border-color: var(--color-primary-800);
    color: var(--color-bg-cream);
}

.materiais-pill:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* ═══════════════════════════════════════════════════════════
   SELECT CUSTOM (escondido no desktop)
   ═══════════════════════════════════════════════════════════ */
.materiais-mobile-select-wrap {
    display: none;
}

/* ═══════════════════════════════════════════════════════════
   GRID DE MATERIAIS + LOADING
   ═══════════════════════════════════════════════════════════ */
.materiais-posts-section {
    position: relative;
    padding-top: 0;
    min-height: 500px;
}

.materiais-posts-container {
    transition: opacity 200ms var(--ease-out);
    will-change: opacity;
}

/* ── LOADING OVERLAY ── */
.materiais-loading-overlay {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    padding-top: 4rem;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    z-index: 10;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 240ms var(--ease-out),
                visibility 240ms var(--ease-out);
}

.materiais-posts-section.is-loading .materiais-loading-overlay {
    opacity: 1;
    visibility: visible;
}

.materiais-posts-section.is-loading .materiais-posts-container {
    opacity: 0.35;
    pointer-events: none;
}

.materiais-loading-spinner {
    width: 44px;
    height: 44px;
    border: 3px solid var(--color-line-soft);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: materiais-spin 0.8s linear infinite;
}

@keyframes materiais-spin {
    to { transform: rotate(360deg); }
}

/* ── ESTADO VAZIO ── */
.materiais-empty {
    text-align: center;
    padding: var(--s-12) 0;
    max-width: 480px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.materiais-empty svg,
.materiais-empty .icon {
    color: var(--color-text-light);
    margin-bottom: var(--s-5);
}

.materiais-empty h2 {
    font-family: var(--font-serif);
    font-size: var(--fs-lg);
    color: var(--color-primary);
    margin-bottom: var(--s-3);
}

.materiais-empty p {
    font-size: var(--fs-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--s-6);
}


/* ═══════════════════════════════════════════════════════════
   RESPONSIVO
   ═══════════════════════════════════════════════════════════ */

/* ── Tablet / Desktop pequeno (até 1024px) ── */
@media (max-width: 1024px) {
    .materiais-hero {
        padding: 7rem 0 3rem;
    }

    .materiais-filters-layout {
        flex-direction: column;
        align-items: center;
        gap: var(--s-4);
    }

    .materiais-search-wrap {
        width: 100%;
        max-width: 400px;
    }

    .materiais-filters {
        gap: var(--s-4);
    }
}

/* ── Mobile landscape / Tablet portrait (até 768px) ── */
@media (max-width: 768px) {
    .section {
        padding-top: 0 !important;
    }

    .materiais-hero {
        padding: 5.5rem 0 2rem;
    }

    .materiais-hero-title {
        font-size: clamp(1.6rem, 6vw, 2.25rem);
        margin-bottom: 8px;
    }

    .materiais-hero-desc {
        font-size: var(--fs-sm);
        max-width: 480px;
    }

    .materiais-filters-wrap {
        padding-bottom: var(--s-5);
        margin-bottom: var(--s-5);
    }

    .materiais-filters-layout {
        flex-direction: column;
        align-items: center;
        gap: var(--s-3);
    }

    .materiais-search-wrap {
        width: 100%;
        max-width: 100%;
    }

    .materiais-filters {
        flex-direction: row;
        align-items: flex-start;
        gap: var(--s-3);
        width: 100%;
    }

    .materiais-filter-group {
        width: auto;
        flex: 1;
        justify-content: center;
    }

    .materiais-filter-pills {
        justify-content: center;
    }

    /* Esconde pills, mostra selects no mobile */
    .materiais-filter-group-pills .materiais-filter-pills {
        display: none;
    }

    .materiais-mobile-select-wrap {
        display: block;
        width: 100%;
        position: relative;
        z-index: 40;
    }

    .materiais-mobile-label {
        display: block;
        font-family: var(--font-sans);
        font-size: 0.6rem;
        font-weight: 600;
        letter-spacing: 0.06em;
        text-transform: uppercase;
        color: var(--color-text-muted);
        margin-bottom: 4px;
    }

    .materiais-select-custom {
        position: relative;
        width: 100%;
        background: var(--color-bg-cream);
        border: 1.5px solid var(--color-line-soft);
        border-radius: var(--radius);
        cursor: pointer;
        user-select: none;
        transition: border-color var(--dur-fast) var(--ease-out);
        z-index: 40;
    }

    .materiais-select-custom:hover {
        border-color: var(--color-line-strong);
    }

    .materiais-select-custom.is-open {
        border-color: var(--color-primary);
        box-shadow: 0 0 0 3px rgba(27, 54, 41, 0.1);
        z-index: 100;
    }

    .materiais-select-current {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0.55rem 0.75rem;
        font-family: var(--font-sans);
        font-size: var(--fs-xs);
        font-weight: 500;
        color: var(--color-text);
        line-height: 1.3;
    }

    .materiais-select-arrow {
        position: absolute;
        right: 0.75rem;
        top: 50%;
        transform: translateY(-50%);
        color: var(--color-text-muted);
        pointer-events: none;
        transition: transform var(--dur-fast) var(--ease-out);
    }

    .materiais-select-custom.is-open .materiais-select-arrow {
        transform: translateY(-50%) rotate(180deg);
    }

    .materiais-select-options {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        margin: 4px 0 0;
        padding: 4px 0;
        background: var(--color-surface);
        border: 1px solid var(--color-line-soft);
        border-radius: var(--radius);
        box-shadow: var(--shadow-lg);
        list-style: none;
        z-index: 200;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-6px);
        transition: opacity var(--dur-fast) var(--ease-out),
                    visibility var(--dur-fast) var(--ease-out),
                    transform var(--dur-fast) var(--ease-out);
        max-height: 260px;
        overflow-y: auto;
    }

    .materiais-select-custom.is-open .materiais-select-options {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .materiais-select-option {
        padding: 0.5rem 0.75rem;
        font-family: var(--font-sans);
        font-size: var(--fs-xs);
        color: var(--color-text-soft);
        cursor: pointer;
        transition: background var(--dur-fast) var(--ease-out),
                    color var(--dur-fast) var(--ease-out);
    }

    .materiais-select-option:hover {
        background: var(--color-surface-alt);
        color: var(--color-primary);
    }

    .materiais-select-option.is-selected {
        font-weight: 600;
        color: var(--color-primary);
        background: rgba(27, 54, 41, 0.06);
    }

    .materiais-posts-section {
        min-height: 400px;
    }

    /* Cards horizontais no mobile */
    .cards-grid {
        grid-template-columns: 1fr;
    }

    .card-material {
        flex-direction: row;
    }

    .card-material .card-media {
        width: 140px;
        min-height: 100px;
        aspect-ratio: auto;
        flex-shrink: 0;
    }

    .card-material .card-body {
        flex: 1;
        min-width: 0;
        padding: var(--s-4) var(--s-5);
    }

    .card-material .card-excerpt {
        display: none;
    }

    .card-material .card-title {
        font-size: var(--fs-sm);
    }
}

/* ── Mobile pequeno (até 480px) ── */
@media (max-width: 480px) {
    .materiais-hero {
        padding: 4.5rem 0 1.5rem;
    }

    .materiais-hero-inner {
        max-width: 100%;
    }

    .materiais-hero-title {
        font-size: clamp(1.4rem, 7vw, 1.85rem);
        margin-bottom: 6px;
    }

    .materiais-hero-desc {
        font-size: var(--fs-xs);
        line-height: 1.6;
    }

    .materiais-filters-wrap {
        padding-bottom: var(--s-4);
        margin-bottom: var(--s-4);
    }

    .materiais-filters {
        gap: var(--s-3);
    }

    .materiais-mobile-label {
        font-size: 0.55rem;
        margin-bottom: 3px;
    }

    .materiais-select-current {
        padding: 0.45rem 0.65rem;
        font-size: 0.7rem;
    }

    .materiais-select-option {
        padding: 0.45rem 0.65rem;
        font-size: 0.7rem;
    }

    .materiais-filter-pills {
        gap: 6px;
    }

    .materiais-pill {
        padding: 0.35rem 0.7rem;
        font-size: 0.7rem;
        border-radius: 6px;
    }

    .materiais-empty {
        padding: var(--s-8) 0;
    }

    .materiais-empty h2 {
        font-size: var(--fs-base);
    }

    .materiais-loading-spinner {
        width: 36px;
        height: 36px;
    }

    .card-material {
        flex-direction: column;
    }

    .card-material .card-media {
        width: 100%;
        min-height: auto;
        aspect-ratio: 16 / 9;
    }

    .card-material .card-body {
        padding: var(--s-4);
    }

    .card-material .card-title {
        font-size: var(--fs-sm);
    }

    .materiais-search {
        min-width: 0;
    }
}

/* ── Mobile muito pequeno (até 360px) ── */
@media (max-width: 360px) {
    .materiais-hero {
        padding: 4rem 0 1.25rem;
    }

    .materiais-hero-title {
        font-size: 1.3rem;
    }

    .materiais-filter-pills {
        gap: 4px;
    }

    .materiais-pill {
        padding: 0.3rem 0.6rem;
        font-size: 0.65rem;
    }

    .card-material .card-media {
        height: 120px;
    }

    .card-play-icon {
        width: 44px;
        height: 44px;
    }

    .card-play-icon svg {
        width: 18px;
        height: 18px;
    }
}

/* ═══════════════════════════════════════════════════════════
   REDUCED MOTION
   ═══════════════════════════════════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
    .materiais-loading-spinner {
        animation-duration: 2s;
    }

    .materiais-posts-container,
    .materiais-loading-overlay {
        transition: none;
    }
}