/**
 * Rubbers.ir - Production Material Single
 */

.rsk-material-page{
    --rsk-ink:#172229;
    --rsk-muted:#66747c;
    --rsk-border:#e2e7ea;
    --rsk-soft:#f6f8f9;
    --rsk-white:#fff;
    --rsk-accent:#c8272f;
    --rsk-accent-soft:#fff2f2;
    --rsk-radius:22px;
    --rsk-shadow:0 12px 35px rgba(23,34,41,.06);
    color:var(--rsk-ink);
    background:#fff;
}

.rsk-material-page *,
.rsk-material-page *::before,
.rsk-material-page *::after{
    box-sizing:border-box;
}

.rsk-material-container,
.rsk-material-shell{
    width:min(1180px,calc(100% - 40px));
    margin-inline:auto;
}

.rsk-material-hero{
    padding:24px 0 64px;
    background:
        radial-gradient(circle at 15% 20%,rgba(200,39,47,.07),transparent 28%),
        linear-gradient(180deg,#fff 0%,#f7f9fa 100%);
    border-bottom:1px solid var(--rsk-border);
}

.rsk-material-breadcrumb{
    margin-bottom:30px;
    color:var(--rsk-muted);
    font-size:13px;
}

.rsk-material-breadcrumb a{
    color:inherit;
    text-decoration:none;
}

.rsk-material-breadcrumb .rank-math-breadcrumb p{
    margin:0;
}

.rsk-material-hero-grid{
    display:grid;
    grid-template-columns:minmax(0,1.15fr) minmax(320px,.85fr);
    align-items:center;
    gap:54px;
}

.rsk-material-eyebrow{
    display:flex;
    flex-wrap:wrap;
    gap:8px;
    align-items:center;
    margin-bottom:18px;
}

.rsk-material-eyebrow span,
.rsk-material-eyebrow a{
    display:inline-flex;
    align-items:center;
    min-height:32px;
    padding:6px 11px;
    border:1px solid var(--rsk-border);
    border-radius:999px;
    background:#fff;
    color:#4b5961;
    font-size:12px;
    font-weight:700;
    text-decoration:none;
}

.rsk-material-eyebrow span{
    border-color:rgba(200,39,47,.2);
    background:var(--rsk-accent-soft);
    color:var(--rsk-accent);
}

.rsk-material-title{
    margin:0 !important;
    color:var(--rsk-ink) !important;
    font-size:clamp(34px,4.5vw,62px) !important;
    line-height:1.15 !important;
    font-weight:900 !important;
    letter-spacing:-.02em;
}

.rsk-material-identities{
    display:flex;
    flex-wrap:wrap;
    gap:8px;
    margin-top:16px;
}

.rsk-material-identities span{
    padding:7px 11px;
    border-radius:10px;
    background:#e9eef0;
    color:#334149;
    font-size:14px;
    font-weight:700;
}

.rsk-material-lead{
    max-width:760px;
    margin-top:23px;
    color:#4f5d65;
    font-size:17px;
    line-height:2;
}

.rsk-material-lead p{
    margin:0;
}

.rsk-material-aliases{
    display:flex;
    gap:8px;
    margin-top:14px;
    color:var(--rsk-muted);
    font-size:13px;
    line-height:1.8;
}

.rsk-material-aliases strong{
    color:#36434a;
}

.rsk-material-featured-note{
    margin-top:20px;
    padding:14px 16px;
    border-right:4px solid var(--rsk-accent);
    border-radius:12px;
    background:#fff;
    color:#3f4d55;
    box-shadow:0 7px 20px rgba(23,34,41,.04);
    line-height:1.9;
}

.rsk-material-meta-line{
    display:flex;
    flex-wrap:wrap;
    gap:15px;
    margin-top:18px;
    color:#7b878e;
    font-size:12px;
}

.rsk-material-hero-media{
    position:relative;
    min-height:390px;
    margin:0;
    overflow:hidden;
    border:1px solid rgba(255,255,255,.85);
    border-radius:28px;
    background:#e6eaec;
    box-shadow:0 24px 55px rgba(24,35,42,.13);
}

.rsk-material-hero-image{
    display:block;
    width:100%;
    height:100%;
    min-height:390px;
    object-fit:cover;
}

.rsk-material-hero-media--placeholder{
    display:flex;
    align-items:center;
    justify-content:center;
    background:
        linear-gradient(135deg,rgba(200,39,47,.95),rgba(117,21,27,.95)),
        #c8272f;
}

.rsk-material-hero-media--placeholder span{
    padding:30px;
    color:#fff;
    font-size:clamp(44px,7vw,88px);
    font-weight:900;
    text-align:center;
    opacity:.96;
}

.rsk-material-shell{
    padding:12px 0 90px;
}

.rsk-material-section{
    padding:70px 0;
    border-bottom:1px solid var(--rsk-border);
}

.rsk-material-section:last-child{
    border-bottom:0;
}

.rsk-material-section-head{
    max-width:780px;
    margin-bottom:30px;
}

.rsk-material-kicker{
    display:block;
    margin-bottom:8px;
    color:var(--rsk-accent);
    font-size:12px;
    font-weight:900;
}

.rsk-material-section-head h2{
    margin:0 !important;
    color:var(--rsk-ink) !important;
    font-size:clamp(26px,3vw,36px) !important;
    line-height:1.35 !important;
    font-weight:900 !important;
}

.rsk-material-section-head p{
    margin:11px 0 0;
    color:var(--rsk-muted);
    line-height:1.9;
}

.rsk-material-overview-grid{
    display:grid;
    grid-template-columns:minmax(0,1.35fr) minmax(300px,.65fr);
    gap:34px;
    align-items:start;
}

.rsk-material-prose{
    color:#3f4d55;
    font-size:16px;
    line-height:2.05;
}

.rsk-material-prose > :first-child{
    margin-top:0;
}

.rsk-material-prose h2,
.rsk-material-prose h3,
.rsk-material-prose h4{
    color:var(--rsk-ink) !important;
    font-weight:900 !important;
    line-height:1.5 !important;
}

.rsk-material-side-stack{
    display:grid;
    gap:16px;
}

.rsk-material-info-box{
    padding:24px;
    border:1px solid var(--rsk-border);
    border-radius:18px;
    background:var(--rsk-soft);
}

.rsk-material-info-box--warning{
    background:#fff9f1;
    border-color:#f0dfc5;
}

.rsk-material-info-box h3{
    margin:0 0 13px !important;
    color:var(--rsk-ink) !important;
    font-size:17px !important;
    font-weight:900 !important;
}

.rsk-material-info-box ul{
    margin:0;
    padding:0 20px 0 0;
}

.rsk-material-info-box li{
    margin:7px 0;
    color:#536169;
    line-height:1.8;
}

.rsk-material-property-grid{
    display:grid;
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:14px;
}

.rsk-material-property-card{
    min-height:130px;
    padding:22px;
    border:1px solid var(--rsk-border);
    border-radius:18px;
    background:#fff;
    box-shadow:0 7px 24px rgba(23,34,41,.035);
}

.rsk-material-property-label{
    display:block;
    margin-bottom:15px;
    color:var(--rsk-muted);
    font-size:13px;
    font-weight:700;
}

.rsk-material-property-value{
    display:block;
    color:var(--rsk-ink);
    font-size:23px;
    line-height:1.45;
    font-weight:900;
}

.rsk-material-resistance-list{
    overflow:hidden;
    border:1px solid var(--rsk-border);
    border-radius:20px;
    background:#fff;
}

.rsk-material-resistance-row{
    display:grid;
    grid-template-columns:1fr auto;
    align-items:center;
    gap:18px;
    min-height:66px;
    padding:14px 20px;
    border-bottom:1px solid var(--rsk-border);
}

.rsk-material-resistance-row:last-child{
    border-bottom:0;
}

.rsk-material-resistance-name{
    color:#344249;
    font-weight:800;
}

.rsk-material-resistance-status{
    min-width:116px;
    padding:8px 12px;
    border-radius:999px;
    text-align:center;
    font-size:12px;
    font-weight:900;
}

.rsk-material-resistance-status--excellent{
    background:#e9f8ef;
    color:#14773c;
}

.rsk-material-resistance-status--good{
    background:#edf7f2;
    color:#2c6f4a;
}

.rsk-material-resistance-status--fair{
    background:#fff7dd;
    color:#886619;
}

.rsk-material-resistance-status--poor{
    background:#fff0e7;
    color:#a55221;
}

.rsk-material-resistance-status--not-recommended{
    background:#ffeded;
    color:#a52d33;
}

.rsk-material-resistance-status--unknown{
    background:#eef1f3;
    color:#67747c;
}

.rsk-material-relations{
    display:grid;
    gap:38px;
}

.rsk-material-relation-group-head{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:15px;
    margin-bottom:16px;
}

.rsk-material-relation-group-head h3{
    margin:0 !important;
    color:var(--rsk-ink) !important;
    font-size:20px !important;
    font-weight:900 !important;
}

.rsk-material-relation-group-head > span{
    color:#7c888e;
    font-size:12px;
}

.rsk-material-relation-grid{
    display:grid;
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:15px;
}

.rsk-material-relation-card{
    border:1px solid var(--rsk-border);
    border-radius:18px;
    background:#fff;
    transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}

.rsk-material-relation-card:hover{
    transform:translateY(-3px);
    border-color:#d4dade;
    box-shadow:var(--rsk-shadow);
}

.rsk-material-relation-card-link{
    display:block;
    height:100%;
    padding:18px;
    color:inherit;
    text-decoration:none !important;
}

.rsk-material-relation-card-top{
    display:grid;
    grid-template-columns:64px minmax(0,1fr);
    gap:14px;
    align-items:center;
}

.rsk-material-relation-thumb{
    width:64px;
    height:64px;
    overflow:hidden;
    border-radius:13px;
    background:#eef1f3;
}

.rsk-material-relation-thumb img{
    width:100%;
    height:100%;
    object-fit:cover;
}

.rsk-material-relation-thumb--empty{
    display:flex;
    align-items:center;
    justify-content:center;
    background:var(--rsk-accent-soft);
    color:var(--rsk-accent);
    font-size:23px;
    font-weight:900;
}

.rsk-material-relation-card h4{
    margin:0 !important;
    color:var(--rsk-ink) !important;
    font-size:16px !important;
    line-height:1.6 !important;
    font-weight:900 !important;
}

.rsk-material-relation-english{
    display:block;
    margin-top:2px;
    color:#7b878e;
    font-size:12px;
}

.rsk-material-relation-card p{
    margin:15px 0 0;
    color:#66737b;
    font-size:13px;
    line-height:1.85;
}

.rsk-material-relation-more{
    display:inline-block;
    margin-top:15px;
    color:var(--rsk-accent);
    font-size:12px;
    font-weight:900;
}

.rsk-material-source-list{
    display:grid;
    gap:10px;
    margin:0;
    padding:0;
    list-style:none;
}

.rsk-material-source-list li{
    display:grid;
    grid-template-columns:36px minmax(0,1fr);
    gap:13px;
    align-items:start;
    padding:17px 18px;
    border:1px solid var(--rsk-border);
    border-radius:15px;
}

.rsk-material-source-index{
    display:flex;
    align-items:center;
    justify-content:center;
    width:34px;
    height:34px;
    border-radius:9px;
    background:var(--rsk-soft);
    color:#647178;
    font-size:12px;
    font-weight:900;
}

.rsk-material-source-list a,
.rsk-material-source-list strong{
    color:#243139;
    font-weight:800;
    text-decoration:none;
}

.rsk-material-source-list a:hover{
    color:var(--rsk-accent);
}

.rsk-material-source-list p{
    margin:5px 0 0;
    color:var(--rsk-muted);
    font-size:13px;
    line-height:1.75;
}

.rsk-material-faq-list{
    display:grid;
    gap:10px;
}

.rsk-material-faq-item{
    border:1px solid var(--rsk-border);
    border-radius:16px;
    background:#fff;
}

.rsk-material-faq-item summary{
    position:relative;
    padding:19px 52px 19px 20px;
    cursor:pointer;
    color:#26343b;
    font-weight:900;
    list-style:none;
}

.rsk-material-faq-item summary::-webkit-details-marker{
    display:none;
}

.rsk-material-faq-item summary::before{
    content:"+";
    position:absolute;
    right:20px;
    top:50%;
    transform:translateY(-50%);
    color:var(--rsk-accent);
    font-size:24px;
    line-height:1;
}

.rsk-material-faq-item[open] summary::before{
    content:"−";
}

.rsk-material-faq-answer{
    padding:0 20px 20px;
    color:#5d6a72;
    line-height:1.95;
}

.rsk-material-faq-answer p{
    margin:0;
}

@media (max-width:960px){
    .rsk-material-hero-grid,
    .rsk-material-overview-grid{
        grid-template-columns:1fr;
    }

    .rsk-material-hero-media{
        min-height:320px;
    }

    .rsk-material-hero-image{
        min-height:320px;
    }

    .rsk-material-property-grid,
    .rsk-material-relation-grid{
        grid-template-columns:repeat(2,minmax(0,1fr));
    }
}

@media (max-width:640px){
    .rsk-material-container,
    .rsk-material-shell{
        width:min(100% - 28px,1180px);
    }

    .rsk-material-hero{
        padding:16px 0 42px;
    }

    .rsk-material-breadcrumb{
        margin-bottom:22px;
        font-size:12px;
    }

    .rsk-material-hero-grid{
        gap:30px;
    }

    .rsk-material-title{
        font-size:34px !important;
    }

    .rsk-material-lead{
        font-size:15px;
    }

    .rsk-material-hero-media,
    .rsk-material-hero-image{
        min-height:250px;
    }

    .rsk-material-section{
        padding:48px 0;
    }

    .rsk-material-property-grid,
    .rsk-material-relation-grid{
        grid-template-columns:1fr;
    }

    .rsk-material-property-card{
        min-height:0;
    }

    .rsk-material-property-value{
        font-size:20px;
    }

    .rsk-material-resistance-status{
        min-width:102px;
    }

    .rsk-material-relation-group-head{
        align-items:flex-end;
    }
}