html, body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background: #f9fafb;
    height: 100%;
    -webkit-overflow-scrolling: touch;
}

/* Asosiy konteyner */
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px 16px;
    box-sizing: border-box;
    padding-bottom: calc(env(safe-area-inset-bottom, 20px) + 90px);
}

/* Kategoriyalar grid */
.categories {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 14px;
}
.category-card {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    border-radius: 12px;
    padding: 20px;
    font-weight: bold;
    color: white;
    font-size: 16px;
    text-decoration: none;
    height: 120px;
    transition: 0.2s;
    box-shadow: 0 2px 6px rgba(0,0,0,0.08);
}
.category-card:hover { transform: translateY(-4px); }

/* Rang variantlari */
.green { background: #34d399; }
.blue { background: #3b82f6; }
.pink { background: #ec4899; }
.orange { background: #f97316; }
.red { background: #ef4444; }
.purple { background: #a855f7; }
.brown { background: #92400e; }
.teal { background: #14b8a6; }
.yellow { background: #facc15; }
.darkgreen { background: #166534; }
.gray { background: #6b7280; }
.default { background: #9ca3af; }

/* 🔥 Promo (Aksiya mahsulotlari) maxsus dizayn */
.category-card.promo {
    background: linear-gradient(135deg, #ef4444, #f97316, #f59e0b);
    color: #fff;
    font-size: 16px;
    font-weight: bold;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(255, 0, 0, 0.4);
    animation: glow 2.5s infinite alternate;
}

/* Yonuvchi effekt */
@keyframes glow {
    0% { box-shadow: 0 0 8px rgba(239, 68, 68, 0.7), 0 0 12px rgba(249, 115, 22, 0.6); }
    50% { box-shadow: 0 0 20px rgba(239, 68, 68, 1), 0 0 30px rgba(249, 115, 22, 0.9); }
    100% { box-shadow: 0 0 8px rgba(239, 68, 68, 0.7), 0 0 12px rgba(249, 115, 22, 0.6); }
}

/* Markazdagi fire emoji */
.category-card.promo::before {
    content: "🔥";
    font-size: 28px;
    display: block;
    margin-bottom: 6px;
    animation: pulse 1.5s infinite;
}

/* Pulsatsiya effekt */
@keyframes pulse {
    0% { text-shadow: 0 0 5px #fff, 0 0 10px #ff4500; }
    50% { text-shadow: 0 0 15px #fff, 0 0 25px #ff6347; }
    100% { text-shadow: 0 0 5px #fff, 0 0 10px #ff4500; }
}

/* Mobil moslashuv */
@media (max-width: 768px) {
    .categories { grid-template-columns: repeat(2, 1fr); }
    .category-card {
        font-size: 14px;
        padding: 16px;
        height: 110px;
    }
}
@media (max-width: 480px) {
    .categories { grid-template-columns: 1fr; }
    .category-card {
        font-size: 13px;
        padding: 14px;
        height: 100px;
    }
}

/* Floating back button (iOS style) */
.back-btn {
    position: fixed;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0,0,0,0.6);
    padding: 10px 22px;
    border-radius: 20px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.2);
    z-index: 9999;
    backdrop-filter: blur(6px);
    color: #fff;
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
}
.back-btn:hover {
    background: rgba(0,0,0,0.75);
}