#start {
    display: grid;
    grid-template-areas:
        "article"
        "start_buttons"
        "access";
    gap: 20px;
    margin: 0 auto;
    width: 100%;
    padding: 10px;
    background: var(--color-gray-light-light);
    min-height: 100%;
    box-sizing: border-box;
    transition: background 0.3s ease, color 0.3s ease;
    justify-items: center;
}

.container-900 {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
}

#article,
#access {
    width: 100%;
    padding: 20px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(6px);
    border-radius: 16px;
    box-shadow: var(--shadow-soft);
    color: var(--color-gray-dark);
    box-sizing: border-box;
}

#article {
    grid-area: article;
}

#access {
    grid-area: access;
}

.article-title,
.access-lead {
    text-align: center;
    margin-bottom: 20px;
}

.article-title {
    font-size: 24px;
}

.article-lead,
.access-lead {
    font-size: 16px;
    color: #666;
}

/* блоки возможностей */
.article-content,
.access-info-block {
    display: flex;
    gap: 12px;
    margin-top: 15px;
    flex-wrap: wrap;
    justify-content: space-between;
}

.feature-block,
.access-card {
    flex: 1 1 calc(33.33% - 8px);
    background: #f8f9fa;
    border: 1px solid #ddd;
    border-radius: 12px;
    padding: 12px 15px;
    font-size: 0.92rem;
    line-height: 1.4;
    display: flex;
    flex-direction: column;
    box-sizing: border-box;
}

.feature-block b,
.access-card b {
    font-weight: 600;
    margin-bottom: 8px;
}

.feature-block ul,
.access-card ul {
    list-style: disc inside;
    padding-left: 5px;
    margin: 0;
}

/* модалка */
.modal {
    display: none;
    position: fixed;
    z-index: 9999;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(3px);
}

.modal-content {
    position: relative;
    margin: 5% auto;
    max-width: 900px;
    width: 90%;
    text-align: center;
}

.modal-content img {
    width: 100%;
    border-radius: 12px;
    max-height: 80vh;
    object-fit: contain;
}

.close {
    position: absolute;
    top: 10px;
    right: 25px;
    color: #fff;
    font-size: 30px;
    font-weight: bold;
    cursor: pointer;
}

.modal-nav {
    margin-top: 10px;
    display: flex;
    justify-content: center;
    gap: 10px;
}

.modal-nav button {
    padding: 10px 20px;
    font-size: 18px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    background: var(--color-primary);
    color: #fff;
}

/* кнопки */
#start_buttons {
    grid-area: start_buttons;
    display: flex;
    justify-content: center;
    gap: 20px;
    padding: 20px;
    flex-wrap: nowrap;
    max-width: 900px;
    margin: 0 auto;
    width: 100%;
    box-sizing: border-box;
}

.start_btns {
    flex: 1 1 calc(20% - 16px);
    min-width: 160px;
}

.start_btn {
    width: 100%;
    height: 140px;
    border-radius: 16px;
    padding: 18px;
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.3;
    border: 2px solid #ddd;
    cursor: pointer;
    transition: all 0.25s ease;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
}

.start_btn:hover {
    transform: translateY(-5px);
}

/* цвета */
#btn_com { background: #f3fbf7; border-color: #3bb273; }
#btn_pr { background: #f0f6ff; border-color: var(--color-primary); }
#btn_3p { background: #fff7ed; border-color: #ff9800; }
#btn_help { background: #f5f5f5; border-color: #6c757d; }
#btn_exam { background: #f9f5f5; border-color: #737d6c; }

@media (max-width: 768px) {
    .feature-block,
    .access-card {
        flex: 1 1 100%;
        min-width: 0; 
    }
    #start_buttons {
        flex-wrap: wrap;
    }

    .start_btn {
        height: 120px;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    #start {
        padding: 8px;
        gap: 15px;
    }

    #article,
    #access {
        padding: 15px;
    }

    .article-title {
        font-size: 20px;
    }

    .article-lead,
    .access-lead {
        font-size: 14px;
    }
    #start_buttons {
        flex-wrap: wrap;
        gap: 8px; 
        padding: 0 5px;
    }
    
    .start_btn {
        height: 100px;
        font-size: 0.85rem;
        padding: 12px;
    }

    .feature-block,
    .access-card {
        flex: 1 1 100%;
        min-width: 0;
        font-size: 0.85rem;
        padding: 10px 12px;
    }
}