* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', sans-serif;
    background: #000;
    color: white;
    -webkit-tap-highlight-color: transparent;
}

.hero-banner {
    position: relative;
}

.hero-banner img {
    width: 100%;
    height: auto;
    display: block;
}

.promo-banner {
    background: #000;
    padding: 35px 20px;
    text-align: center;
}

.promo-content h2 {
    font-size: 40px;
    font-weight: 800;
    margin-bottom: 8px;
}

.promo-number {
    color: #FF6B6B;
    font-size: 60px;
    font-weight: 900;
}

.promo-content p {
    font-size: 24px;
    font-weight: 600;
    color: #ccc;
    margin-bottom: 20px;
}

.action-btn {
    background: #4CAF50;
    color: white;
    border: none;
    font-weight: 800;
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.2s;
}

.action-btn:active {
    transform: scale(0.98);
    opacity: 0.9;
}

.redeem-btn {
    padding: 18px 50px;
    font-size: 20px;
    width: 100%;
    max-width: 360px;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2px;
    background: #000;
}

.gallery-item {
    aspect-ratio: 1;
    overflow: hidden;
    background: #1a1a1a;
    cursor: pointer;
    transition: transform 0.2s;
    position: relative;
}

.gallery-item:active {
    transform: scale(0.98);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.gallery-item.promo-item {
    background: linear-gradient(135deg, #FF6B6B 0%, #FF8E53 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.promo-overlay {
    text-align: center;
    color: white;
    padding: 20px 15px;
}

.promo-overlay h3 {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 6px;
}

.promo-number-sm {
    color: #FFD700;
    font-size: 42px;
    font-weight: 900;
}

.promo-overlay p {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 18px;
}

.redeem-btn-sm {
    padding: 12px 28px;
    font-size: 14px;
}

.bottom-buttons {
    background: #000;
    padding: 20px 15px;
}

.btn-row {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
}

.bottom-btn {
    flex: 1;
    padding: 18px;
    font-size: 16px;
}

.main-action-btn {
    width: 100%;
    padding: 22px;
    font-size: 20px;
}

.footer {
    background: #000;
    padding: 24px 15px;
    text-align: center;
}

.footer p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    margin-bottom: 6px;
}

.footer .copyright {
    color: rgba(255, 255, 255, 0.4);
    font-size: 12px;
}

@media (min-width: 768px) {
    .gallery-grid {
        grid-template-columns: repeat(4, 1fr);
        max-width: 1200px;
        margin: 0 auto;
    }

    .promo-banner {
        max-width: 1200px;
        margin: 0 auto;
    }

    .bottom-buttons {
        max-width: 1200px;
        margin: 0 auto;
    }
}