/* Ktby Educational Library — public interface */
:root {
    --ktby-green: #14a85a;
    --ktby-green-dark: #087c63;
    --ktby-teal: #0d9488;
    --ktby-ink: #172033;
    --ktby-muted: #667085;
    --ktby-line: #dce6e8;
    --ktby-soft: #f3f8f7;
    --ktby-white: #fff;
    --ktby-shadow: 0 18px 50px rgba(24, 73, 72, .10);
    --ktby-radius: 24px;
}

.ktby-library,
.ktby-library * { box-sizing: border-box; }
.ktby-library { direction: rtl; color: var(--ktby-ink); font-family: inherit; line-height: 1.75; margin: 0 auto; max-width: 1220px; padding: 18px 8px 46px; }
.ktby-library a { text-decoration: none; }

.ktby-hero {
    align-items: center;
    background: linear-gradient(135deg, #078f7a 0%, #19ad55 100%);
    border-radius: 30px;
    box-shadow: var(--ktby-shadow);
    color: #fff;
    display: grid;
    gap: 34px;
    grid-template-columns: minmax(0, 1.05fr) minmax(300px, .95fr);
    margin-bottom: 30px;
    overflow: hidden;
    padding: 42px;
    position: relative;
}
.ktby-hero::before,
.ktby-hero::after { border: 1px solid rgba(255,255,255,.14); border-radius: 50%; content: ""; position: absolute; }
.ktby-hero::before { height: 320px; left: -110px; top: -180px; width: 320px; }
.ktby-hero::after { bottom: -160px; height: 290px; right: 28%; width: 290px; }
.ktby-hero > * { position: relative; z-index: 1; }
.ktby-eyebrow { display: inline-block; font-size: 13px; font-weight: 800; letter-spacing: .04em; margin-bottom: 7px; opacity: .9; }
.ktby-hero h2 { color: #fff; font-size: clamp(28px, 4vw, 48px); line-height: 1.35; margin: 0 0 12px; }
.ktby-hero p { color: rgba(255,255,255,.9); font-size: 17px; margin: 0; max-width: 650px; }

.ktby-search { background: rgba(255,255,255,.96); border: 1px solid rgba(255,255,255,.7); border-radius: 22px; box-shadow: 0 15px 35px rgba(0,0,0,.12); padding: 18px; }
.ktby-search-label { color: var(--ktby-ink); display: block; font-size: 14px; font-weight: 800; margin-bottom: 8px; }
.ktby-search-row { display: flex; gap: 8px; }
.ktby-search input { background: #f6faf9; border: 1px solid #dbe8e6; border-radius: 14px; color: var(--ktby-ink); flex: 1; font: inherit; min-width: 0; outline: none; padding: 13px 15px; }
.ktby-search input:focus { border-color: var(--ktby-teal); box-shadow: 0 0 0 3px rgba(13,148,136,.12); }
.ktby-search button { background: var(--ktby-green); border: 0; border-radius: 14px; color: #fff; cursor: pointer; font: inherit; font-weight: 800; padding: 11px 22px; }
.ktby-search button:hover { background: var(--ktby-green-dark); }

.ktby-section { margin-top: 28px; }
.ktby-section-heading { align-items: center; display: flex; gap: 12px; justify-content: space-between; margin-bottom: 15px; }
.ktby-section-heading h2 { color: var(--ktby-ink); font-size: 23px; margin: 0; }
.ktby-section-heading span { background: #e9f8f1; border-radius: 999px; color: #087d55; font-size: 13px; font-weight: 800; padding: 5px 11px; }
.ktby-section-heading a { color: var(--ktby-teal); font-weight: 800; }

.ktby-library-grid { display: grid; gap: 16px; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.ktby-category-card { background: var(--ktby-white); border: 1px solid var(--ktby-line); border-radius: 22px; box-shadow: 0 8px 28px rgba(25,65,67,.06); overflow: hidden; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
.ktby-category-card:hover { border-color: #9bd8c6; box-shadow: 0 16px 38px rgba(25,65,67,.12); transform: translateY(-3px); }
.ktby-category-card > a { color: inherit; display: grid; grid-template-columns: 92px minmax(0,1fr); min-height: 116px; padding: 12px; }
.ktby-card-image { align-items: center; background: #eff8f7; border-radius: 16px; display: flex; grid-row: span 2; justify-content: center; min-height: 90px; overflow: hidden; }
.ktby-card-image img { height: 100%; object-fit: cover; width: 100%; }
.ktby-card-placeholder { color: var(--ktby-green); font-size: 36px; }
.ktby-card-title { align-self: end; font-size: 18px; font-weight: 900; padding: 5px 14px 0 8px; }
.ktby-card-description { color: var(--ktby-muted); font-size: 13px; padding: 0 14px 5px 8px; }

.ktby-resource-grid { display: grid; gap: 18px; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.ktby-resource-card { background: #fff; border: 1px solid var(--ktby-line); border-radius: 22px; box-shadow: 0 8px 28px rgba(25,65,67,.06); overflow: hidden; position: relative; transition: transform .2s ease, box-shadow .2s ease; }
.ktby-resource-card:hover { box-shadow: 0 17px 40px rgba(25,65,67,.14); transform: translateY(-4px); }
.ktby-resource-card > a { color: inherit; display: block; height: 100%; }
.ktby-resource-thumb { align-items: center; aspect-ratio: 4 / 3; background: linear-gradient(145deg,#eaf7f4,#f8fbfb); display: flex; justify-content: center; overflow: hidden; position: relative; }
.ktby-resource-thumb img { height: 100%; object-fit: cover; transition: transform .25s ease; width: 100%; }
.ktby-resource-card:hover img { transform: scale(1.035); }
.ktby-resource-placeholder { color: var(--ktby-teal); font-size: 52px; }
.ktby-resource-body { padding: 16px; }
.ktby-resource-body h3 { color: var(--ktby-ink); font-size: 17px; line-height: 1.55; margin: 0 0 9px; }
.ktby-resource-body p { color: var(--ktby-muted); font-size: 13px; margin: 0; }
.ktby-resource-ribbon { background: #087f6c; border-radius: 999px; color: #fff; font-size: 11px; font-weight: 900; left: 12px; padding: 5px 10px; position: absolute; top: 12px; z-index: 2; }
.ktby-resource-ribbon.solution { background: #2563eb; }
.ktby-resource-ribbon.exam { background: #d97706; }
.ktby-resource-ribbon.distribution { background: #7c3aed; }
.ktby-new-badge { background: #ef4444; border-radius: 999px; color: #fff; font-size: 10px; font-weight: 900; padding: 4px 8px; position: absolute; right: 12px; top: 12px; z-index: 2; }

.ktby-breadcrumbs { align-items: center; color: var(--ktby-muted); display: flex; flex-wrap: wrap; font-size: 13px; gap: 8px; margin: 4px 0 18px; }
.ktby-breadcrumbs a { color: var(--ktby-teal); font-weight: 700; }

.ktby-category-header,
.ktby-resource-header { align-items: center; background: linear-gradient(135deg,#eef8f6,#f8fbfb); border: 1px solid var(--ktby-line); border-radius: 26px; display: flex; gap: 24px; padding: 25px; }
.ktby-category-header img { background: #fff; border-radius: 18px; height: 110px; object-fit: cover; width: 110px; }
.ktby-category-header h2,
.ktby-resource-header h2 { color: var(--ktby-ink); font-size: clamp(25px,3vw,38px); line-height: 1.4; margin: 0 0 7px; }
.ktby-category-header p,
.ktby-resource-header p { color: var(--ktby-muted); margin: 0; }

.ktby-resource-page { max-width: 1080px; }
.ktby-resource-header { align-items: flex-start; }
.ktby-resource-cover { background: #fff; border: 1px solid var(--ktby-line); border-radius: 20px; flex: 0 0 190px; overflow: hidden; }
.ktby-resource-cover img { display: block; height: 245px; object-fit: cover; width: 100%; }
.ktby-resource-heading { flex: 1; padding-top: 6px; }
.ktby-type-pill { background: #dcfce7; border-radius: 999px; color: #087d55; display: inline-block; font-size: 12px; font-weight: 900; margin-bottom: 8px; padding: 5px 11px; }
.ktby-resource-meta { color: var(--ktby-muted); display: flex; flex-wrap: wrap; font-size: 12px; gap: 8px 18px; margin-top: 15px; }

.ktby-notice { background: #fff8e8; border: 1px solid #f4d99d; border-radius: 20px; margin-top: 20px; padding: 18px 20px; }
.ktby-notice-title { align-items: center; color: #9a5c00; display: flex; gap: 9px; }
.ktby-notice-title span { align-items: center; background: #f2b23f; border-radius: 50%; color: #fff; display: inline-flex; font-weight: 900; height: 26px; justify-content: center; width: 26px; }
.ktby-notice p { color: #744b10; margin: 9px 0 4px; }
.ktby-notice small { color: #936c35; }

.ktby-viewer-section { background: #fff; border: 1px solid var(--ktby-line); border-radius: 24px; box-shadow: var(--ktby-shadow); margin-top: 22px; overflow: hidden; }
.ktby-viewer-toolbar { align-items: center; background: #f4f9f8; border-bottom: 1px solid var(--ktby-line); display: flex; gap: 12px; justify-content: space-between; padding: 14px 17px; }
.ktby-viewer-toolbar > div { display: flex; flex-direction: column; }
.ktby-viewer-toolbar span { color: var(--ktby-muted); font-size: 11px; }
.ktby-download-button { background: var(--ktby-green); border-radius: 12px; color: #fff !important; font-size: 13px; font-weight: 900; padding: 9px 15px; }
.ktby-viewer { background: #29323c; height: var(--ktby-viewer-height,620px); position: relative; }
.ktby-viewer iframe { border: 0; height: 100%; opacity: 0; position: relative; transition: opacity .25s ease; width: 100%; z-index: 2; }
.ktby-viewer.is-loaded iframe { opacity: 1; }
.ktby-viewer-loading { align-items: center; color: #fff; display: flex; flex-direction: column; gap: 12px; inset: 0; justify-content: center; position: absolute; }
.ktby-viewer-loading span { animation: ktby-spin .8s linear infinite; border: 3px solid rgba(255,255,255,.25); border-radius: 50%; border-top-color: #fff; height: 34px; width: 34px; }
.ktby-viewer.is-loaded .ktby-viewer-loading { display: none; }
@keyframes ktby-spin { to { transform: rotate(360deg); } }
.ktby-files-list { border-top: 1px solid var(--ktby-line); padding: 16px; }
.ktby-files-list h3 { font-size: 16px; margin: 0 0 10px; }
.ktby-files-list > div { display: grid; gap: 8px; }
.ktby-files-list a { align-items: center; background: #f7faf9; border: 1px solid var(--ktby-line); border-radius: 13px; color: var(--ktby-ink); display: grid; gap: 10px; grid-template-columns: 30px 1fr auto; padding: 10px 12px; }
.ktby-files-list a > span { align-items: center; background: #dff5ed; border-radius: 8px; color: #087d55; display: flex; font-size: 12px; font-weight: 900; height: 28px; justify-content: center; }
.ktby-files-list small { color: var(--ktby-muted); }

.ktby-rich-content { background: #fff; border: 1px solid var(--ktby-line); border-radius: 22px; margin-top: 22px; overflow-wrap: anywhere; padding: 24px; }
.ktby-rich-content img { height: auto; max-width: 100%; }
.ktby-links-box { background: #fff; border: 1px solid var(--ktby-line); border-radius: 22px; margin-top: 20px; overflow: hidden; }
.ktby-links-header { align-items: center; background: #eff8f6; display: flex; gap: 10px; padding: 14px 18px; }
.ktby-links-header > span { align-items: center; background: var(--ktby-teal); border-radius: 10px; color: #fff; display: inline-flex; font-weight: 900; height: 34px; justify-content: center; width: 34px; }
.ktby-links-header h2 { font-size: 18px; margin: 0; }
.ktby-links-video .ktby-links-header { background: #fff1f1; }
.ktby-links-video .ktby-links-header > span { background: #ef4444; }
.ktby-links-notice { color: var(--ktby-muted); padding: 12px 18px 0; }
.ktby-link-buttons { display: grid; gap: 9px; grid-template-columns: repeat(2,minmax(0,1fr)); padding: 16px 18px 18px; }
.ktby-link-buttons a { background: #f4f8f7; border: 1px solid var(--ktby-line); border-radius: 13px; color: var(--ktby-ink); font-weight: 800; padding: 11px 14px; transition: border-color .2s ease, background .2s ease; }
.ktby-link-buttons a:hover { background: #eaf8f3; border-color: #9ddbc7; }

.ktby-search-page { background: #fff; border: 1px solid var(--ktby-line); border-radius: 24px; padding: 24px; }
.ktby-search-page > h2 { margin-top: 0; }
.ktby-search-page .ktby-search { border: 1px solid var(--ktby-line); box-shadow: none; margin-bottom: 24px; }
.ktby-search-help,
.ktby-empty { background: #f6faf9; border: 1px dashed #bad5cf; border-radius: 18px; color: var(--ktby-muted); padding: 28px; text-align: center; }
.ktby-message { margin-top: 35px; }
.ktby-message h2 { color: var(--ktby-ink); margin: 0 0 5px; }
.ktby-message p { margin: 0; }

@media (max-width: 980px) {
    .ktby-hero { grid-template-columns: 1fr; padding: 30px; }
    .ktby-library-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .ktby-resource-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
}

@media (max-width: 700px) {
    .ktby-library { padding: 10px 0 35px; }
    .ktby-hero { border-radius: 22px; gap: 22px; padding: 24px 18px; }
    .ktby-hero h2 { font-size: 29px; }
    .ktby-search-row { flex-direction: column; }
    .ktby-search button { width: 100%; }
    .ktby-library-grid { grid-template-columns: 1fr; }
    .ktby-resource-grid { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 11px; }
    .ktby-resource-card { border-radius: 17px; }
    .ktby-resource-body { padding: 12px; }
    .ktby-resource-body h3 { font-size: 14px; }
    .ktby-section-heading { align-items: flex-start; }
    .ktby-section-heading h2 { font-size: 19px; }
    .ktby-category-header,
    .ktby-resource-header { align-items: center; border-radius: 20px; flex-direction: column; padding: 20px; text-align: center; }
    .ktby-resource-cover { flex-basis: auto; width: 170px; }
    .ktby-resource-cover img { height: 220px; }
    .ktby-resource-meta { justify-content: center; }
    .ktby-viewer-toolbar { align-items: stretch; flex-direction: column; }
    .ktby-download-button { text-align: center; }
    .ktby-viewer { height: min(72vh,var(--ktby-viewer-height,620px)); }
    .ktby-link-buttons { grid-template-columns: 1fr; }
    .ktby-files-list a { grid-template-columns: 30px 1fr; }
    .ktby-files-list small { grid-column: 2; }
}

@media (max-width: 420px) {
    .ktby-resource-grid { grid-template-columns: 1fr 1fr; }
    .ktby-resource-thumb { aspect-ratio: 1 / 1; }
}

/* Resource card markup aliases */
.ktby-ribbon { background:#087f6c; border-radius:999px; color:#fff; font-size:11px; font-weight:900; left:12px; padding:5px 10px; position:absolute; top:12px; z-index:2; }
.ktby-ribbon-solution { background:#2563eb; }
.ktby-ribbon-exam { background:#d97706; }
.ktby-ribbon-distribution { background:#7c3aed; }
.ktby-ribbon-preparation { background:#0891b2; }
.ktby-ribbon-worksheet { background:#db2777; }
.ktby-ribbon-review { background:#4f46e5; }
.ktby-ribbon-summary { background:#475569; }
.ktby-ribbon-powerpoint { background:#ea580c; }
.ktby-ribbon-activity { background:#16a34a; }
.ktby-resource-title { color:var(--ktby-ink); font-size:16px; line-height:1.6; margin:0; min-height:72px; padding:15px 16px 17px; }
@media (max-width:700px) { .ktby-resource-title { font-size:13px; min-height:66px; padding:11px 11px 13px; } }
.ktby-card-placeholder svg,.ktby-resource-placeholder svg { fill:none; height:48px; stroke:currentColor; stroke-linecap:round; stroke-linejoin:round; stroke-width:3; width:48px; }
.ktby-resource-placeholder svg { height:58px; width:58px; }