/* =====================================================
   KNOWLEDGE BASE
   Part 1
===================================================== */

.knowledge-base{

    --primary:#17365d;
    --primary-light:#1e73be;

    --background:#f5f7fb;
    --card:#ffffff;

    --text:#1f2937;
    --text-light:#667085;

    --border:#e5e7eb;

    --radius:16px;

    --shadow:0 4px 16px rgba(0,0,0,.08);
    --shadow-hover:0 10px 28px rgba(0,0,0,.12);

    --transition:.25s ease;

    font-family:Arial, Helvetica, sans-serif;

    color:var(--text);

    line-height:1.6;

    background:var(--background);

    padding:25px 0;

}

/* ======================================
   Reset только внутри блока
====================================== */

.knowledge-base *,
.knowledge-base *::before,
.knowledge-base *::after{

    box-sizing:border-box;

}

/* ======================================
   Container
====================================== */
:root{
    --header-height:80px;
}

.knowledge-base{
    padding-top:calc(var(--header-height) + 20px);
}

.knowledge-base .kb-container{
    max-width:1200px;
    margin:auto;
    padding:0 20px;
}

/* ======================================
   Hero
====================================== */

.knowledge-base .kb-hero{
    background:linear-gradient(135deg,#17365d,#2c5d94);
    color:#fff;
    border-radius:20px;
    padding:25px 35px;
    margin-bottom:15px;
    text-align:center;
}

.knowledge-base .kb-hero h1{
    margin:0;
    font-size:42px;
    font-weight:700;
}

.knowledge-base .kb-hero p{
    max-width:760px;
    margin:20px auto 35px;
    opacity:.95;
    font-size:18px;
}

/* ======================================
   Search
====================================== */

.knowledge-base .kb-search{
    max-width:700px;
    margin:auto;
}

.knowledge-base .kb-search input{
    width:100%;
    padding:16px 22px;
    border:none;
    border-radius:50px;
    outline:none;
    font-size:16px;
    background:#fff;
    box-shadow:var(--shadow);
    transition:var(--transition);
}

.knowledge-base .kb-search input:focus{
    box-shadow:0 0 0 4px rgba(30,115,190,.2);
}

/* ======================================
   Sections
====================================== */

.knowledge-base .kb-section,
.knowledge-base .kb-categories{
    padding:40px 0;

}

.knowledge-base .kb-section-light{
    background:#fff;
    border-radius:18px;
    margin:30px 0;
}

/* ======================================
   Header
====================================== */

.knowledge-base .kb-section-header{
    display:flex;
    justify-content:space-between;
    align-items:center;
    gap:20px;
    margin-bottom:25px;
}

.knowledge-base .kb-section-header h2{
    margin:0;
    color:var(--primary);
    font-size:32px;
    font-weight:700;
}

.knowledge-base .kb-links{
    display:flex;
    align-items:center;
    gap:20px;
}

/* ======================================
   Links
====================================== */

.knowledge-base .kb-section-link,
.knowledge-base .kb-back-top{
    color:var(--primary-light);
    text-decoration:none;
    font-size:15px;
    font-weight:600;
    transition:var(--transition);
}

.knowledge-base .kb-section-link:hover,
.knowledge-base .kb-back-top:hover{
    color:var(--primary);
    text-decoration:underline;
}

/* =====================================================
     Категории и карточки материалов
===================================================== */


/* ======================================
   Категории
====================================== */

.knowledge-base .kb-category-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
    gap:20px;
}

.knowledge-base .kb-category-card{
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    text-align:center;
    text-decoration:none;
    background:var(--card);
    color:var(--text);
    padding:8px 20px;
    border-radius:var(--radius);
    box-shadow:var(--shadow);
    border:1px solid transparent;
    transition:var(--transition);
}

.knowledge-base .kb-category-card:hover{
    transform:translateY(-6px);
    border-color:#d7e3ef;
    box-shadow:var(--shadow-hover);
}

.knowledge-base .kb-category-card span{
    font-size:42px;
    margin-bottom:15px;
}

.knowledge-base .kb-category-card h3{
    margin:0 0 10px;
    color:var(--primary);
    font-size:20px;
}

.knowledge-base .kb-category-card p{
    margin:0;
    font-size:14px;
    color:var(--text-light);
}


/* ======================================
   Сетка материалов
====================================== */

.knowledge-base .kb-materials-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(300px,1fr));
    gap:24px;
}


/* ======================================
   Карточка материала
====================================== */

.knowledge-base .kb-material-card{
    display:flex;
    flex-direction:column;
    background:var(--card);
    padding:24px;
    border-radius:18px;
    border:1px solid transparent;
    box-shadow:var(--shadow);
    transition:var(--transition);
}

.knowledge-base .kb-material-card:hover{
    transform:translateY(-6px);
    border-color:#d7e3ef;
    box-shadow:var(--shadow-hover);
}


/* ======================================
   Бейдж
====================================== */

.knowledge-base .kb-badge{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:max-content;
    padding:6px 14px;
    border-radius:50px;
    font-size:13px;
    font-weight:700;
    margin-bottom:18px;
}

.knowledge-base .article{
    background:#e8f2ff;
    color:#1565c0;
}

.knowledge-base .instruction{
    background:#fff4df;
    color:#d97706;
}

.knowledge-base .template{
    background:#eaf8ee;
    color:#15803d;
}


/* ======================================
   Заголовок карточки
====================================== */

.knowledge-base .kb-material-card h3{
    margin:0 0 12px;
    color:var(--primary);
    font-size:22px;
    line-height:1.35;
}


/* ======================================
   Текст карточки
====================================== */

.knowledge-base .kb-material-card p{
    margin:0;
    color:var(--text-light);
    flex:1;
    font-size:15px;
}


/* ======================================
   Ссылка
====================================== */

.knowledge-base .kb-material-card a{
    display:inline-flex;
    align-items:center;
    gap:8px;
    margin-top:22px;
    color:var(--primary-light);
    text-decoration:none;
    font-weight:700;
    transition:var(--transition);
}

.knowledge-base .kb-material-card a:hover{
    color:var(--primary);
    transform:translateX(6px);
}


/* ======================================
   Анимация появления
====================================== */
.knowledge-base .kb-category-card,
.knowledge-base .kb-material-card{
    animation:kbFade .45s ease;
}

@keyframes kbFade{
    from{
        opacity:0;
        transform:translateY(12px);
    }

    to{
        opacity:1;
        transform:translateY(0);
    }
}

/*=====================================================
    FAQ
======================================================*/

.knowledge-base details{
    background:#fff;
    border-radius:16px;
    margin-bottom:16px;
    overflow:hidden;
    box-shadow:var(--shadow);
    border:1px solid var(--border);
    transition:var(--transition);
}

.knowledge-base details:hover{
    box-shadow:var(--shadow-hover);
}

.knowledge-base summary{
    list-style:none;
    cursor:pointer;
    padding:18px 22px;
    font-size:17px;
    font-weight:600;
    color:var(--primary);
    position:relative;
    user-select:none;
}

.knowledge-base summary::-webkit-details-marker{
    display:none;

}

.knowledge-base summary::after{
    content:"+";
    position:absolute;
    right:22px;
    top:50%;
    transform:translateY(-50%);
    font-size:26px;
    color:var(--primary-light);
    transition:.3s;
}

.knowledge-base details[open] summary::after{
    content:"−";
}

.knowledge-base details p{
    padding:0 22px 20px;
    margin:0;
    color:var(--text-light);
    line-height:1.7;
}

/*=====================================================
    Consultation
======================================================*/

.knowledge-base .kb-consultation{
    margin-top:50px;
    background:linear-gradient(135deg,#17365d,#295b93);
    border-radius:20px;
    color:#fff;
    text-align:center;
    padding:60px 30px;
}

.knowledge-base .kb-consultation h2{
    margin-bottom:18px;
    font-size:34px;
}

.knowledge-base .kb-consultation p{
    max-width:720px;
    margin:0 auto 30px;
    opacity:.95;
    font-size:17px;
}

.knowledge-base .kb-btn{
    display:inline-block;
    padding:15px 34px;
    background:#fff;
    color:var(--primary);
    text-decoration:none;
    border-radius:50px;
    font-weight:700;
    transition:var(--transition);
    box-shadow:0 8px 20px rgba(0,0,0,.18);
}

.knowledge-base .kb-btn:hover{
    background:#eef4fb;
    transform:translateY(-3px);
}

/*=====================================================
    Планшеты
======================================================*/

@media (max-width:992px){
.knowledge-base .kb-hero{
    padding:40px 25px;
}

.knowledge-base .kb-hero h1{
    font-size:36px;
}

.knowledge-base .kb-section-header{
    flex-direction:column;
    align-items:flex-start;
    gap:15px;
}

.knowledge-base .kb-links{
    width:100%;
    justify-content:space-between;
}

.knowledge-base .kb-materials-grid{
    grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
}

}

/*=====================================================
    Телефоны
======================================================*/

@media (max-width:768px){
.knowledge-base{
    padding:15px 0;
}

.knowledge-base .kb-container{
    padding:0 15px;
}

.knowledge-base .kb-hero{
    border-radius:14px;
    padding:30px 20px;
}

.knowledge-base .kb-hero h1{
    font-size:28px;
}

.knowledge-base .kb-hero p{
    font-size:16px;
}

.knowledge-base .kb-search input{
    padding:14px 18px;
    font-size:15px;
}

.knowledge-base .kb-section{
    padding:30px 0;
}

.knowledge-base .kb-section-header h2{
    font-size:26px;
}

.knowledge-base .kb-category-grid{
    grid-template-columns:repeat(2,1fr);
    gap:15px;
}

.knowledge-base .kb-category-card{
    padding:20px 15px;
}

.knowledge-base .kb-category-card span{
    font-size:34px;
}

.knowledge-base .kb-materials-grid{
    grid-template-columns:1fr;
}

.knowledge-base .kb-material-card{
    padding:20px;
}

.knowledge-base .kb-consultation{
    padding:45px 20px;
}

.knowledge-base .kb-consultation h2{
    font-size:28px;
}

.knowledge-base .kb-btn{
    width:100%;
    max-width:320px;
}

}

/*=====================================================
    Маленькие телефоны
======================================================*/

@media (max-width:480px){
.knowledge-base .kb-category-grid{
    grid-template-columns:1fr;
}

.knowledge-base .kb-links{
    flex-direction:column;
    align-items:flex-start;
    gap:8px;
}

.knowledge-base .kb-section-link,
.knowledge-base .kb-back-top{
    font-size:14px;
}

.knowledge-base .kb-material-card h3{
    font-size:20px;
}

.knowledge-base summary{
    font-size:16px;
}

}

/*=====================================================
    Поиск по странице
======================================================*/

.kb-no-results{
    display:none;
    margin-top:20px;
    text-align:center;
    padding:18px;
    border-radius:12px;
    background:#fff3cd;
    color:#856404;
    font-weight:600;
}

.kb-highlight{
    background:#ffe082;
    padding:1px 3px;
    border-radius:4px;
}