/* =========================================
   HERO BANNER CSS (SECTION 2)
   ========================================= */

.hero-banner {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    /* Có hình nền thật - không lỗi 404 */
    background-image: url('https://images.unsplash.com/photo-1512917774080-9991f1c4c750?auto=format&fit=crop&w=2000&q=80');
    background-size: cover;
    background-position: center bottom;
    color: var(--color-white);
}

/* Gradient overlay for readability */
.hero-bg-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, rgba(23, 41, 57, 0.9) 0%, rgba(23, 41, 57, 0.4) 50%, rgba(23, 41, 57, 0.1) 100%);
    z-index: 1;
}

.hero-container {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: end;
    padding-top: 100px;
    padding-bottom: 80px;
}

.hero-content {
    max-width: 700px;
}

.hero-title {
    font-size: clamp(3rem, 5vw, 5.5rem);
    line-height: 1.1;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
}

.hero-subtitle {
    font-size: 0.95rem;
    font-weight: 300;
    letter-spacing: 0.05em;
    line-height: 1.8;
    margin-bottom: 2.5rem;
    color: rgba(255, 255, 255, 0.85);
    max-width: 500px;
}

/* Video Thumbnail Box */
.hero-video-box {
    justify-self: end;
    width: 440px;
    margin-bottom: -150px; /* Overlap down like original design */
    position: relative;
    z-index: 3;
}

.video-thumbnail {
    position: relative;
    border-radius: 4px;
    padding: 16px 16px 70px 16px; /* Thick glass border + bottom area */
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border: 1px solid rgba(255, 255, 255, 0.35);
    box-shadow: 0 40px 80px rgba(0, 0, 0, 0.4);
    transition: transform 0.4s ease;
}

.video-thumbnail:hover {
    transform: translateY(-10px);
}

.video-thumbnail img {
    display: block;
    width: 100%;
    aspect-ratio: 16/10;
    object-fit: cover;
    border-radius: 2px;
}

/* Play button overlay */
.play-btn {
    position: absolute;
    top: calc(50% - 20px); /* Center relative to image height only, offset padding */
    left: 50%;
    transform: translate(-50%, -50%);
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 2;
}

.play-btn:hover {
    background: rgba(255, 255, 255, 0.5);
    transform: translate(-50%, -50%) scale(1.1);
}

.video-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--color-white);
    z-index: 2;
}

@media (max-width: 992px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .hero-video-box {
        justify-self: start;
        margin-bottom: 0;
        width: 100%;
        max-width: 500px;
    }
}