/* Materials directory page: directory layout aligned with the Yuxincode knowledge-base pattern. */
.materials-directory-body {
    background: #f2f2f2;
}

.materials-directory-page,
.materials-directory-page * {
    box-sizing: border-box;
}

.materials-directory-page {
    color: #172033;
    background: #f2f2f2;
}

.materials-directory-container {
    width: 100%;
    max-width: 1480px;
    margin: 0 auto;
    padding-right: 80px;
    padding-left: 80px;
}

.materials-directory-hero {
    position: relative;
    display: flex;
    min-height: 620px;
    padding: 100px 0 88px;
    overflow: hidden;
    align-items: center;
    color: #fff;
    background: linear-gradient(135deg, #102033 0%, #1f6f78 48%, #d8f0f2 100%);
}

.materials-directory-hero::before {
    position: absolute;
    inset: 0;
    content: "";
    pointer-events: none;
    background: radial-gradient(circle at 82% 24%, rgba(255, 255, 255, 0.22), transparent 28%), linear-gradient(90deg, rgba(5, 18, 31, 0.78), rgba(5, 18, 31, 0.28));
}

.materials-directory-hero .materials-directory-container {
    position: relative;
    z-index: 1;
}

.materials-directory-hero-grid {
    display: grid;
    align-items: center;
    grid-template-columns: minmax(0, 1fr) 410px;
    gap: 70px;
}

.materials-directory-eyebrow {
    display: inline-flex;
    min-height: 34px;
    margin-bottom: 18px;
    padding: 6px 16px;
    align-items: center;
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.45);
    border-radius: 5px;
    font-size: 0.82rem;
    font-weight: 600;
    line-height: 1.4;
}

.materials-directory-hero h1 {
    margin: 0 0 18px;
    color: #fff;
    font-size: 3.2rem;
    line-height: 1.15;
}

.materials-directory-hero-copy > p {
    max-width: 760px;
    margin: 0;
    color: rgba(255, 255, 255, 0.92);
    font-size: 0.95rem;
    line-height: 1.85;
}

.materials-directory-hero-actions {
    display: flex;
    margin-top: 30px;
    flex-wrap: wrap;
    gap: 14px;
}

.materials-directory-hero-actions a {
    display: inline-flex;
    min-height: 42px;
    padding: 0 22px;
    align-items: center;
    justify-content: center;
    border-radius: 5px;
    font-size: 0.875rem;
    font-weight: 700;
    text-decoration: none;
}

.materials-directory-hero-actions .primary {
    color: #102033;
    background: #fff;
}

.materials-directory-hero-actions .secondary {
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.materials-directory-overview {
    padding: 24px;
    color: #142033;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.92);
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.22);
}

.materials-directory-overview h2 {
    margin: 0 0 18px;
    color: #142033;
    font-size: 1.05rem;
    line-height: 1.4;
}

.materials-directory-stats {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.materials-directory-stats > div {
    padding: 16px;
    border: 1px solid #dbe4ee;
    border-radius: 8px;
    background: #fff;
}

.materials-directory-stats strong {
    display: block;
    margin-bottom: 8px;
    color: #0b6673;
    font-size: 1.65rem;
    line-height: 1;
}

.materials-directory-stats span {
    display: block;
    color: #596777;
    font-size: 0.78rem;
    line-height: 1.45;
}

.materials-directory-main {
    padding: 100px 0;
}

.materials-directory-head {
    display: flex;
    margin-bottom: 28px;
    align-items: flex-end;
    justify-content: space-between;
    gap: 28px;
}

.materials-directory-head h2 {
    margin: 0 0 12px;
    color: #102033;
    font-size: 2rem;
    line-height: 1.3;
}

.materials-directory-head p {
    max-width: 920px;
    margin: 0;
    color: #475569;
    font-size: 0.875rem;
    line-height: 1.8;
}

.materials-directory-head p + p {
    margin-top: 4px;
}

.materials-directory-count {
    display: flex;
    padding: 12px 16px;
    flex: 0 0 auto;
    align-items: center;
    gap: 8px;
    color: #334155;
    border: 1px solid #dbe4ee;
    border-radius: 8px;
    background: #fff;
    font-size: 0.875rem;
}

.materials-directory-count strong {
    color: #102033;
    font-size: 1.2rem;
}

.materials-directory-filter {
    display: grid;
    margin-bottom: 26px;
    padding: 18px;
    grid-template-columns: 1fr 1fr 2fr auto;
    gap: 14px;
    border: 1px solid #dbe4ee;
    border-radius: 8px;
    background: #fff;
    box-shadow: 0 16px 36px rgba(15, 23, 42, 0.06);
}

.materials-directory-field {
    display: flex;
    min-width: 0;
    flex-direction: column;
    gap: 8px;
}

.materials-directory-field label {
    color: #334155;
    font-size: 0.8rem;
    font-weight: 700;
}

.materials-directory-field select,
.materials-directory-field input {
    width: 100%;
    height: 44px;
    padding: 0 12px;
    color: #102033;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    outline: none;
    background: #fff;
    font: inherit;
    font-size: 0.875rem;
}

.materials-directory-field select:focus,
.materials-directory-field input:focus {
    border-color: #1f6f78;
    box-shadow: 0 0 0 3px rgba(31, 111, 120, 0.12);
}

.materials-directory-reset {
    min-width: 110px;
    height: 44px;
    align-self: end;
    color: #000;
    border: 1px solid #000;
    border-radius: 8px;
    background: #fff;
    font: inherit;
    font-size: 0.875rem;
    cursor: pointer;
}

.materials-directory-reset:hover {
    color: #ffd400;
    background: #000;
}

.materials-directory-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
}

.materials-directory-card {
    display: flex;
    min-height: 410px;
    overflow: hidden;
    flex-direction: column;
    border: 1px solid #dbe4ee;
    border-radius: 8px;
    background: #fff;
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.materials-directory-card:hover {
    border-color: #9fb5c8;
    box-shadow: 0 18px 34px rgba(15, 23, 42, 0.08);
    transform: translateY(-2px);
}

.materials-directory-media {
    display: block;
    width: 100%;
    height: 225px;
    overflow: hidden;
    border-bottom: 1px solid #edf2f7;
    background: linear-gradient(135deg, #edf2f7, #f8fafc);
}

.materials-directory-media img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.25s ease;
}

.materials-directory-card:hover .materials-directory-media img {
    transform: scale(1.025);
}

.materials-directory-placeholder {
    display: flex;
    width: 100%;
    height: 100%;
    align-items: center;
    justify-content: center;
    color: #64748b;
    font-size: 0.875rem;
}

.materials-directory-card-body {
    display: flex;
    padding: 18px 20px 20px;
    flex: 1;
    flex-direction: column;
}

.materials-directory-card-top {
    display: flex;
    margin-bottom: 14px;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.materials-directory-badge {
    display: inline-flex;
    min-height: 28px;
    padding: 4px 10px;
    align-items: center;
    color: #334155;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    background: #f8fafc;
    font-size: 0.8rem;
    line-height: 1.2;
}

.materials-directory-type {
    overflow: hidden;
    color: #64748b;
    font-size: 0.8rem;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.materials-directory-card h3 {
    margin: 0 0 10px;
    color: #102033;
    font-size: 1.1rem;
    line-height: 1.45;
}

.materials-directory-card h3 a {
    color: inherit;
    text-decoration: none;
}

.materials-directory-card h3 a:hover {
    color: #0b6673;
}

.materials-directory-card p {
    display: -webkit-box;
    margin: 0 0 15px 0px;
    overflow: hidden;
    color: #475569;
    font-size: 0.8rem;
    line-height: 1.75;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 4;
}

.materials-directory-action {
    display: inline-flex;
    min-height: 36px;
    margin-top: auto;
    padding: 0 14px;
    align-items: center;
    justify-content: center;
    color: #102033;
    border: 1px solid #102033;
    border-radius: 5px;
    background: #fff;
    font-size: 0.875rem;
    font-weight: 700;
    text-decoration: none;
}

.materials-directory-action:hover {
    color: #ffd400;
    background: #102033;
}

.materials-directory-empty {
    display: none;
    padding: 40px;
    color: #475569;
    border: 1px solid #dbe4ee;
    border-radius: 8px;
    background: #fff;
    font-size: 0.875rem;
    text-align: center;
}

.materials-directory-empty.is-visible {
    display: block;
}

@media (max-width: 1200px) {
    .materials-directory-hero-grid {
        grid-template-columns: 1fr;
        gap: 34px;
    }

    .materials-directory-filter {
        grid-template-columns: 1fr 1fr;
    }

    .materials-directory-reset {
        align-self: auto;
    }

    .materials-directory-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 900px) {
    .materials-directory-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 700px) {
    .materials-directory-container {
        padding-right: 20px;
        padding-left: 20px;
    }

    .materials-directory-hero {
        min-height: auto;
        padding: 72px 0 64px;
    }

    .materials-directory-hero h1 {
        font-size: 2.35rem;
    }

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

    .materials-directory-main {
        padding: 68px 0;
    }

    .materials-directory-head {
        display: block;
    }

    .materials-directory-head h2 {
        font-size: 1.65rem;
    }

    .materials-directory-count {
        margin-top: 18px;
    }

    .materials-directory-filter,
    .materials-directory-grid {
        grid-template-columns: 1fr;
    }

    .materials-directory-card {
        min-height: 390px;
    }

    .materials-directory-media {
        height: 220px;
    }

}