/* ==========================================================================
   СТИЛИ ДЛЯ СТРАНИЦЫ "ПРЕЗЕНТАЦИЯ" (presentation.php)
   ========================================================================== */

.page-presentation {
    padding: 40px 0 80px;
    background-color: #fdfdfd;
}

.pres-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 40px;
}

.pres-header h1 {
    font-size: 36px;
    color: #1f2937;
    margin: 0 0 15px;
    font-weight: 800;
}

.pres-header p {
    font-size: 18px;
    color: #6b7280;
    margin: 0;
}

.pres-content {
    max-width: 900px;
    margin: 0 auto;
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 4px 25px rgba(0,0,0,0.05);
    border: 1px solid #e5e7eb;
    overflow: hidden;
}

/* Блок с видео (сохраняет пропорции 16:9) */
.pres-video-wrap {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    background: #111;
}

.pres-video-wrap iframe,
.pres-video-wrap video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

/* Блок скачивания PDF */
.pres-download-box {
    padding: 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
    background: #f9fafb;
    border-top: 1px solid #e5e7eb;
}

.pres-info {
    display: flex;
    align-items: center;
    gap: 20px;
}

.pres-icon {
    width: 50px;
    height: 50px;
    color: #ef4444; /* Красный цвет, как у PDF */
    flex-shrink: 0;
}

.pres-text h3 {
    margin: 0 0 8px;
    color: #1f2937;
    font-size: 20px;
    font-weight: 700;
}

.pres-text p {
    margin: 0;
    color: #6b7280;
    font-size: 15px;
    line-height: 1.5;
}

.btn-download {
    background: #0377c0;
    color: #fff;
    padding: 14px 28px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: transform 0.2s, background 0.2s;
    white-space: nowrap;
}

.btn-download:hover {
    background: #025a92;
    transform: translateY(-2px);
}

/* Адаптивность для мобильных */
@media (max-width: 768px) {
    .pres-header h1 { font-size: 28px; }
    .pres-download-box { 
        flex-direction: column; 
        text-align: center; 
        padding: 30px 20px;
    }
    .pres-info { 
        flex-direction: column; 
        gap: 15px;
    }
    .btn-download { width: 100%; justify-content: center; }
}