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

:root {
    --primary-color: #00875F;
    --primary-hover: #007050;
    --secondary-color: #E8F5E9;
    --text-primary: #202124;
    --text-secondary: #5f6368;
    --border-color: #e0e0e0;
    --background-light: #fff;
    --rating-color: #00875F;
}

body {
    font-family: "Google Sans", "Roboto", Arial, sans-serif;
    line-height: 1.6;
    background-color: var(--background-light);
    color: var(--text-primary);
    padding-bottom: 56px;
}

/* Header Styles */
.top-header {
    background-color: var(--background-light);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    height: 60px;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    color: var(--text-secondary);
}

.logo-section img {
    height: 26px;
}

.nav-actions {
    display: flex;
    gap: 28px;
    color: var(--text-secondary);
}

.nav-actions .material-icons {
    cursor: pointer;
    font-size: 26px;
}

/* Main Content */
.main-content {
    margin-top: 60px;
    padding: 20px;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

/* App Container */
.app-wrapper {
    background-color: var(--background-light);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

/* App Header */
.app-header-section {
    display: flex;
    gap: 28px;
    margin-bottom: 28px;
}

.app-logo {
    width: 72px;
    height: 72px;
    border-radius: 16px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.app-details {
    flex: 1;
}

.app-title {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.developer {
    color: var(--primary-color);
    font-size: 0.875rem;
    margin-bottom: 4px;
}

.app-info {
    color: var(--text-secondary);
    font-size: 0.75rem;
}

/* App Metrics */
.app-metrics {
    display: flex;
    gap: 36px;
    margin-bottom: 16px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.metric-box .rating,
.metric-box .downloads,
.metric-box .age {
    font-size: 0.938rem;
    font-weight: 500;
    margin-bottom: 2px;
    color: var(--rating-color);
}

.metric-box .count,
.metric-box .label {
    color: var(--text-secondary);
    font-size: 0.75rem;
}

/* Action Buttons */
.action-section {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.primary-btn {
    flex: 1;
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 24px;
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background-color 0.2s;
}

.secondary-btn {
    flex: 1;
    background-color: var(--background-light);
    color: var(--primary-color);
    border: 1px solid var(--border-color);
    padding: 12px 20px;
    border-radius: 24px;
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background-color 0.2s;
}

.primary-btn:hover {
    background-color: var(--primary-hover);
}

.secondary-btn:hover {
    background-color: var(--secondary-color);
}

/* Share Buttons */
.share-buttons {
    display: flex;
    gap: 28px;
    padding: 16px 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 16px;
}

.share-btn,
.wishlist-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.9rem;
    padding: 8px 0;
}

.share-btn:hover,
.wishlist-btn:hover {
    color: var(--primary-color);
}

/* Device Section */
.device-section {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 0;
    color: var(--text-secondary);
}

.device-icon {
    font-size: 24px;
}

.device-message {
    font-size: 0.9rem;
}

/* Screenshots */
.screenshots-container {
    margin: 16px 0;
    padding: 20px 0;
}

.screenshot-scroll {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    gap: 20px;
    padding: 8px 4px;
    scrollbar-width: none;
}

.screenshot-scroll::-webkit-scrollbar {
    display: none;
}

.screenshot {
    flex: 0 0 auto;
    height: 420px;
    border-radius: 12px;
    scroll-snap-align: start;
    object-fit: cover;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

/* Section Headers */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-top: 1px solid var(--border-color);
    margin-bottom: 12px;
}

.section-header h2 {
    font-size: 1.125rem;
    font-weight: 500;
}

/* About Section */
.about-content {
    padding: 16px 0;
}

.about-content p {
    color: var(--text-primary);
    font-size: 0.875rem;
    line-height: 1.5;
    margin-bottom: 16px;
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 24px;
    font-size: 0.875rem;
    line-height: 1.8;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.feature-item .material-icons {
    color: var(--primary-color);
    font-size: 24px;
}

.feature-item span:last-child {
    color: var(--text-primary);
    font-size: 0.95rem;
}

.update-info {
    margin: 20px 0;
}

.update-info h3 {
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 4px;
}

.update-info p {
    font-size: 0.813rem;
    color: var(--text-secondary);
    margin: 0;
}

.tags-section {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
}

.tag {
    background-color: var(--secondary-color);
    color: var(--primary-color);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.813rem;
}

/* Safety Section */
.safety-content {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
    margin-bottom: 20px;
}

.safety-items {
    margin-top: 28px;
}

.safety-item {
    display: flex;
    gap: 20px;
    padding: 20px 0;
    border-top: 1px solid var(--border-color);
}

.safety-item:first-child {
    border-top: none;
}

.safety-item .material-icons {
    color: var(--primary-color);
    font-size: 28px;
}

.item-text h3 {
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 2px;
}

.item-text p,
.learn-more {
    font-size: 0.813rem;
    color: var(--text-secondary);
}

.learn-more {
    color: var(--primary-color);
    text-decoration: none;
}

.learn-more:hover {
    text-decoration: underline;
}

/* Reviews Section */
.ratings-summary {
    display: flex;
    gap: 40px;
    padding: 0 0 20px;
    border-bottom: 1px solid var(--border-color);
}

.rating-big {
    display: flex;
    flex-direction: column;
    min-width: 90px;
}

.rating-number {
    font-size: 3rem;
    font-weight: 500;
    line-height: 1;
    color: var(--text-primary);
}

.rating-stars {
    margin: 8px 0;
    color: var(--rating-color);
    display: flex;
    gap: 2px;
}

.rating-stars .material-icons {
    font-size: 14px;
}

.total-reviews {
    color: var(--text-secondary);
    font-size: 0.813rem;
}

.rating-bars {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 8px;
    padding-top: 8px;
}

.rating-bar-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.bar-label {
    color: var(--text-secondary);
    font-size: 0.813rem;
    min-width: 8px;
}

.bar-container {
    flex: 1;
    height: 8px;
    background-color: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.bar-fill {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    background-color: var(--rating-color);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.bar-percentage {
    color: var(--text-secondary);
    font-size: 0.813rem;
    margin-left: 8px;
    min-width: 32px;
}

/* Review Items */
.review-item {
    padding: 24px 0;
    border-top: 1px solid var(--border-color);
}

.review-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 12px;
}

.reviewer-info {
    display: flex;
    gap: 16px;
}

.avatar {
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
}

.reviewer-name {
    font-weight: 500;
    margin-bottom: 2px;
}

.review-date {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.review-rating {
    margin-bottom: 12px;
}

.review-rating .material-icons {
    color: var(--rating-color);
    font-size: 16px;
}

.review-content {
    color: var(--text-primary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 20px;
}

.review-helpful {
    margin-bottom: 20px;
}

.helpful-text {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-bottom: 10px;
}

.helpful-buttons {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.helpful-btn {
    padding: 8px 20px;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    background: none;
    color: var(--text-primary);
    font-size: 0.85rem;
    cursor: pointer;
}

.helpful-btn:hover {
    background-color: var(--secondary-color);
}

/* Developer Reply */
.developer-reply {
    background-color: var(--secondary-color);
    padding: 20px;
    border-radius: 12px;
    margin-top: 20px;
}

.reply-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
}

.developer-name {
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.9rem;
}

.reply-date {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.reply-content {
    color: var(--text-primary);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Footer */
.footer-navigation {
    background-color: var(--background-light);
    padding: 48px 20px 24px;
    margin-top: 40px;
    border-top: 1px solid var(--border-color);
}

.footer-group {
    margin-bottom: 36px;
}

.footer-group h3 {
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 20px;
}

.footer-group ul {
    list-style: none;
}

.footer-group ul li {
    margin-bottom: 14px;
}

.footer-group ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.footer-group ul li a:hover {
    color: var(--primary-color);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 28px;
    margin-bottom: 36px;
    padding-bottom: 28px;
    border-bottom: 1px solid var(--border-color);
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.footer-bottom a:hover {
    color: var(--primary-color);
}

/* Bottom Navigation */
.bottom-navigation {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--background-light);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-around;
    padding: 6px 0;
    z-index: 1000;
}

.nav-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.8rem;
    padding: 8px 0;
    min-width: 72px;
}

.nav-link span {
    display: block;
}

.nav-link .material-icons {
    font-size: 24px;
    margin-bottom: 4px;
}

.nav-link.active {
    color: var(--primary-color);
}

@media (max-width: 768px) {
    .screenshot {
        height: 240px;
    }

    .app-header-section {
        gap: 16px;
        margin-bottom: 20px;
    }

    .app-logo {
        width: 56px;
        height: 56px;
        border-radius: 12px;
    }

    .app-title {
        font-size: 1.125rem;
        line-height: 1.3;
        margin-bottom: 4px;
    }

    .developer {
        font-size: 0.813rem;
        margin-bottom: 4px;
    }

    .app-info {
        font-size: 0.75rem;
    }

    .app-metrics {
        justify-content: flex-start;
        overflow-x: auto;
    }

    .action-section {
        flex-direction: column;
    }

    .share-buttons {
        justify-content: space-around;
    }

    .footer-navigation {
        padding: 32px 16px 16px;
    }

    .features-list {
        gap: 12px;
    }

    .feature-item {
        gap: 12px;
    }

    .feature-item .material-icons {
        font-size: 20px;
    }

    .ratings-summary {
        gap: 24px;
        padding: 0 0 16px;
        margin-bottom: 16px;
    }

    .rating-big {
        min-width: 80px;
    }

    .rating-number {
        font-size: 2.5rem;
    }

    .rating-stars .material-icons {
        font-size: 12px;
    }

    .rating-bars {
        gap: 6px;
    }

    .bar-container {
        height: 6px;
        border-radius: 3px;
    }

    .bar-fill {
        border-radius: 3px;
    }
}

@media (min-width: 768px) {
    .footer-navigation {
        padding: 48px 64px 24px;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }

    .footer-links,
    .footer-bottom {
        grid-column: 1 / -1;
    }
}

@media (min-width: 1024px) {
    .footer-navigation {
        grid-template-columns: repeat(3, 1fr);
    }
}