body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    background-color: #000;
    font-family: 'Inter', sans-serif;
    overflow: hidden;
}

.scroll-container {
    height: 100vh;
    width: 100vw;
    overflow-y: scroll;
    scroll-snap-type: y mandatory;
    scroll-behavior: smooth;
    scrollbar-width: none; 
    -ms-overflow-style: none;
}
.scroll-container::-webkit-scrollbar {
    display: none;
}

.video-section {
    height: 100vh;
    width: 100vw;
    scroll-snap-align: start;
    scroll-snap-stop: always;
    position: relative;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.video-bg {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    object-fit: cover;
    z-index: 1;
}

.overlay-gradient {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(0,0,0,0.3) 0%, rgba(0,0,0,0) 25%, rgba(0,0,0,0) 50%, rgba(0,0,0,0.7) 75%, rgba(0,0,0,0.95) 100%);
    z-index: 2;
    pointer-events: none;
}

.content-box {
    position: relative;
    z-index: 3;
    width: 100%;
    padding: 1.25rem;
    color: white;
}
@media (min-width: 768px) {
    .content-box {
        padding: 2rem;
    }
}

.st-title {
    font-family: 'Montserrat', sans-serif;
    text-transform: uppercase;
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 1s ease-out, transform 1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    text-shadow: 2px 4px 10px rgba(0,0,0,0.9);
    -webkit-text-stroke: 0.5px white; 
}
@media (min-width: 768px) {
    .st-title {
        -webkit-text-stroke: 1.2px white;
    }
}

.st-desc {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 1s ease-out 0.2s, transform 1s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.2s;
    text-shadow: 1px 2px 5px rgba(0,0,0,0.9);
}

.st-line {
    width: 0px;
    height: 3px;
    background: #ef4444;
    margin: 1rem 0;
    transition: width 1s ease-out 0.4s;
}
@media (min-width: 768px) {
    .st-line { height: 4px; margin: 1.5rem 0; }
}

.is-visible .st-title,
.is-visible .st-desc {
    opacity: 1;
    transform: translateY(0);
}

.is-visible .st-line {
    width: 50px; 
}
@media (min-width: 768px) {
    .is-visible .st-line { width: 80px; }
}

.pagination {
    position: fixed;
    right: 8px; 
    top: 50%;
    transform: translateY(-50%);
    z-index: 50;
    display: flex;
    flex-direction: column;
    gap: 8px; 
}
@media (min-width: 768px) {
    .pagination { right: 20px; gap: 12px; }
}

.dot {
    width: 6px; 
    height: 6px;
    border-radius: 50%;
    background: rgba(255,255,255,0.3);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 0 5px rgba(0,0,0,0.5);
}
@media (min-width: 768px) {
    .dot { width: 8px; height: 8px; }
}

.dot:hover {
    background: rgba(255,255,255,0.8);
}

.dot.active {
    background: white;
    transform: scale(1.5);
    box-shadow: 0 0 10px rgba(255,255,255,0.5);
}

.sound-btn {
    position: fixed;
    bottom: 20px; 
    right: 10px;
    z-index: 50;
    background: rgba(0,0,0,0.4);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.2);
    color: white;
    width: 40px; 
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
}
@media (min-width: 768px) {
    .sound-btn { bottom: 30px; right: 30px; width: 50px; height: 50px; }
}
.sound-btn svg {
    width: 20px; height: 20px;
}
@media (min-width: 768px) {
    .sound-btn svg { width: 24px; height: 24px; }
}

.sound-btn:hover {
    background: rgba(0,0,0,0.8);
    transform: scale(1.05);
}