/* Global Styles */
:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --accent-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
    --text-color: #333;
    --text-light: #7f8c8d;
    --white: #fff;
    --shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
    overflow-x: hidden;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3, h4 {
    margin-bottom: 1rem;
    line-height: 1.2;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
    color: var(--dark-color);
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1rem;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: var(--transition);
}

a:hover {
    color: var(--accent-color);
}

img {
    max-width: 100%;
    height: auto;
}

.btn {
    display: inline-block;
    background: var(--primary-color);
    color: var(--white);
    padding: 0.8rem 1.8rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
    text-align: center;
}

.btn:hover {
    background: var(--accent-color);
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.section-subtitle {
    color: var(--text-light);
    margin-bottom: 2rem;
    font-size: 1.1rem;
    text-align: center;
}

/* Header Styles */
header {
    background-color: var(--white);
    box-shadow: var(--shadow);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
}

header.scrolled {
    padding: 0.5rem 0;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark-color);
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 2rem;
}

nav ul li a {
    color: var(--dark-color);
    font-weight: 600;
    position: relative;
}

nav ul li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    bottom: -5px;
    left: 0;
    transition: var(--transition);
}

nav ul li a:hover::after {
    width: 100%;
}

.hamburger {
    display: none;
    cursor: pointer;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--dark-color);
    margin: 5px 0;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    padding: 8rem 0 4rem;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}

.hero-content {
    flex: 1;
    min-width: 300px;
    padding-right: 2rem;
}

.hero-content h1 {
    color: var(--dark-color);
    margin-bottom: 1.5rem;
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.stores {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.store-btn {
    display: inline-block;
    height: 50px;
    transition: var(--transition);
}

.store-btn:hover {
    transform: translateY(-3px);
}

.store-btn img {
    height: 100%;
    width: auto;
    border-radius: 5px;
}

.hero-image {
    flex: 1;
    min-width: 300px;
    text-align: center;
    margin-top: 2rem;
}

/* Platforms Section */
.platforms-section {
    padding: 4rem 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.platforms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.platform-card {
    background: white;
    border-radius: 10px;
    padding: 2rem 1rem;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease, box-shadow 0.3s ease;
}

.platform-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.platform-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.platform-card i {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

/* Apps Section */
.apps-section {
    padding: 5rem 0;
    background-color: var(--white);
}

.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.app-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease, box-shadow 0.3s ease;
}

.app-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.app-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.app-image {
    height: 200px;
    overflow: hidden;
}

.app-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.app-card:hover .app-image img {
    transform: scale(1.05);
}

.app-content {
    padding: 1.5rem;
}

.app-content h3 {
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.app-description {
    color: var(--text-light);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.app-links {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.app-link {
    padding: 0.5rem 1rem;
    border-radius: 5px;
    font-size: 0.8rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.3rem;
    transition: var(--transition);
}

.app-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 10px rgba(0,0,0,0.1);
}

.app-link.ios {
    background-color: #000;
    color: white;
}

.app-link.android {
    background-color: #4285F4;
    color: white;
}

.app-link.xiaomi {
    background-color: #FF6700;
    color: white;
}

.app-link.huawei {
    background-color: #FF0000;
    color: white;
}

/* Platform Filter */
.platform-filter {
    display: flex;
    gap: 1rem;
    margin: 2rem 0;
    flex-wrap: wrap;
    justify-content: center;
}

.filter-btn {
    padding: 0.5rem 1.5rem;
    border: 2px solid var(--primary-color);
    background: transparent;
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
}

.filter-btn.active, .filter-btn:hover {
    background: var(--primary-color);
    color: white;
}

/* Stats Section */
.stats-section {
    padding: 5rem 0;
    background-color: var(--light-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.stat-card {
    background: white;
    border-radius: 10px;
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.stat-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.stat-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.stat-card h3 {
    font-size: 2.5rem;
    color: var(--dark-color);
}

/* About Section */
.about-section {
    padding: 5rem 0;
    background-color: #f9f9f9;
}

.about-section .container {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 3rem;
}

.about-content {
    flex: 1;
    min-width: 300px;
}

.about-image {
    flex: 1;
    min-width: 300px;
    text-align: center;
}

.about-image img {
    border-radius: 100%;
    box-shadow: var(--shadow);
    max-width: 100%;
    max-height: 400px;
    object-fit: cover;
}

.skills {
    margin-top: 2rem;
}

.skills ul {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    list-style: none;
    margin-top: 1rem;
}

.skills ul li {
    background: var(--primary-color);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
}

/* Contact Section */
.contact-section {
    padding: 5rem 0;
    background-color: var(--white);
}

.contact-content {
    display: flex;
    flex-wrap: wrap;
    gap: 3rem;
    margin-top: 2rem;
}

.contact-info {
    flex: 1;
    min-width: 300px;
}

.info-item {
    display: flex;
    align-items: center;
    margin-bottom: 1.5rem;
    gap: 1rem;
}

.info-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--light-color);
    border-radius: 50%;
    color: var(--dark-color);
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary-color);
    color: var(--white);
}

.contact-form {
    flex: 1;
    min-width: 300px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

/* Footer */
footer {
    background-color: var(--dark-color);
    color: var(--white);
    padding: 2rem 0;
    text-align: center;
}

footer p {
    margin-bottom: 0;
}

.footer-links {
    margin-top: 1rem;
}

.footer-links a {
    color: var(--light-color);
    margin: 0 0.5rem;
}

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

/* Responsive Styles */
@media (max-width: 768px) {
    nav ul {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--white);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        transition: var(--transition);
        z-index: 999;
    }

    nav ul.active {
        left: 0;
    }

    nav ul li {
        margin: 1rem 0;
    }

    .hamburger {
        display: block;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .hero .container {
        flex-direction: column;
        text-align: center;
    }

    .hero-content {
        padding-right: 0;
        margin-bottom: 2rem;
    }

    .stores {
        justify-content: center;
    }

    .about-section .container {
        flex-direction: column;
    }

    .about-content {
        order: 2;
    }

    .about-image {
        order: 1;
    }

    .contact-content {
        flex-direction: column;
    }

    .platforms-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .platforms-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}