:root {
    --primary: #01AD9C;
    --bg: #f9fafb;
    --text: #111827;
    --muted: #6b7280;
    --card: #ffffff;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    /* overscroll-behavior: none; */
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

header {
    background: var(--primary);
    color: white;
    padding: 48px 20px;
    text-align: center;
}

header h1 {
    margin: 0 0 12px;
    font-size: 2.2rem;
}

header p {
    margin: 0;
    font-size: 1.1rem;
    opacity: 0.95;
}

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

.section {
    margin-bottom: 48px;
}

.section h2 {
    font-size: 1.6rem;
    margin-bottom: 16px;
}

.card {
    background: var(--card);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
    margin-bottom: 16px;
}

.lang {
    margin-bottom: 12px;
}

ul {
    padding-left: 20px;
}

.buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 16px;
}

.button {
    background: var(--primary);
    color: white;
    text-decoration: none;
    padding: 12px 20px;
    border-radius: 10px;
    font-weight: 600;
    transition: background 0.2s ease;
}

.button:hover {
    background: #1e40af;
}

footer {
    text-align: center;
    padding: 24px 20px;
    color: var(--muted);
    font-size: 0.9rem;
}

@media (max-width: 600px) {
    header h1 {
        font-size: 1.8rem;
    }
}

/* Apple-style Slider */
.preview-section {
    margin: 0 auto;
    padding: 0;
    overflow: hidden;
}

.slider-wrapper {
    position: relative;
    margin: 0 -20px;
}

.slider {
    display: flex;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    gap: 12px;
    padding: 20px;
    padding-left: 20px;
    scroll-padding-left: 20px;
    touch-action: pan-y pan-x pinch-zoom;
    overscroll-behavior-x: contain;
    overscroll-behavior-y: auto;
}

.slider::-webkit-scrollbar {
    display: none;
}

.slide {
    flex-shrink: 0;
    width: 260px;
    scroll-snap-align: start;
    scroll-snap-stop: always;
}

.slide img {
    width: 100%;
    height: auto;
    border-radius: 22px;
    display: block;
    pointer-events: none;
    user-select: none;
    -webkit-user-drag: none;
    box-shadow:
        0 4px 12px rgba(0, 0, 0, 0.1),
        0 2px 4px rgba(0, 0, 0, 0.06);
}

.store-buttons {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    /* khoảng cách giữa 2 nút */
    flex-wrap: nowrap;
}

.store-btn img {
    height: 56px;
    width: auto;
    display: block;
}

.store-btn {
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.store-btn:hover {
    transform: translateY(-2px);
}

.store-btn:active {
    transform: scale(0.97);
}

/* Desktop specific */
@media (min-width: 768px) {
    .slider-wrapper {
        /* max-width: 900px; */
        margin: 0 0;
        overflow: visible;
        /* Thay vì hidden */
    }

    .slider {
        padding: 20px 0;
        cursor: grab;
        /* Thêm cursor để biết có thể kéo */
    }

    .slider:active {
        cursor: grabbing;
    }

    .slide {
        width: 280px;
    }

    /* Hiển thị scrollbar trên desktop */
    .slider::-webkit-scrollbar {
        display: block !important;
        height: 8px;
    }

    .slider::-webkit-scrollbar-track {
        background: #f1f1f1;
        border-radius: 10px;
    }

    .slider::-webkit-scrollbar-thumb {
        background: var(--primary);
        border-radius: 10px;
    }

    .slider::-webkit-scrollbar-thumb:hover {
        background: #018c7d;
    }

    .slider {
        scrollbar-width: thin !important;
        /* Firefox */
        scrollbar-color: var(--primary) #f1f1f1;
    }
}

/* Larger desktop */
@media (min-width: 1024px) {
    .slide {
        width: 300px;
    }
}

/* Small phones */
@media (max-width: 375px) {
    .slide {
        width: 240px;
    }
}

/* Mobile */
@media (max-width: 600px) {
    .store-btn img {
        height: 60px;
        /* to hơn cho mobile */
    }
}

@media (max-width: 480px) {
  .store-btn img {
    height: 50px;        /* nhỏ hơn để fit 1 dòng */
  }

  .store-buttons {
    gap: 6px;
  }
}