:root {
    --primary-color: #6c5ce7;
    --secondary-color: #a29bfe;
    --background-dark: #0f0f13;
    --background-light: #1a1a24;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --border-color: #2a2a35;
    --success-color: #00b894;
    --error-color: #d63031;
    --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition-speed: 0.3s;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-dark);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header Styles */
header {
    background-color: var(--background-light);
    padding: 1rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.logo h1 {
    font-size: 1.8rem;
    color: var(--primary-color);
    font-weight: 700;
    letter-spacing: -0.5px;
    transition: transform var(--transition-speed);
}

.logo h1:hover {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: all var(--transition-speed);
}

.nav-links a:hover {
    color: var(--primary-color);
    background-color: rgba(108, 92, 231, 0.1);
}

.nav-links a.active {
    color: var(--primary-color);
    background-color: rgba(108, 92, 231, 0.1);
}

.search-container {
    max-width: 1200px;
    margin: 1rem auto;
    display: flex;
    gap: 0.5rem;
    padding: 0 1rem;
}

.search-container input {
    flex: 1;
    padding: 1rem 1.5rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--background-dark);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-speed);
}

.search-container input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.2);
}

.search-container button {
    padding: 1rem 2rem;
    background-color: var(--primary-color);
    border: none;
    border-radius: 8px;
    color: white;
    cursor: pointer;
    transition: all var(--transition-speed);
    font-weight: 600;
}

.search-container button:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
}

/* Main Content Styles */
main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
    flex: 1;
}

section {
    margin-bottom: 4rem;
    animation: fadeIn 0.5s ease-out;
}

h2 {
    margin-bottom: 2rem;
    color: var(--text-primary);
    font-size: 2rem;
    font-weight: 700;
    position: relative;
    padding-bottom: 0.5rem;
}

h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 4px;
    background-color: var(--primary-color);
    border-radius: 2px;
}

/* Featured Apps Grid */
.featured-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.app-card {
    background-color: var(--background-light);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all var(--transition-speed);
    position: relative;
    overflow: hidden;
    box-shadow: var(--card-shadow);
}

.app-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, transparent, rgba(108, 92, 231, 0.1));
    opacity: 0;
    transition: opacity var(--transition-speed);
}

.app-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
}

.app-card:hover::before {
    opacity: 1;
}

.app-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 1rem;
    transition: transform var(--transition-speed);
}

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

.app-card h3 {
    margin-bottom: 0.5rem;
    font-size: 1.4rem;
    font-weight: 600;
}

.app-card p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.app-meta {
    display: flex;
    gap: 1rem;
    margin: 1rem 0;
    color: var(--text-secondary);
}

.app-meta span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* All Apps Grid */
.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

/* App Details Page */
.app-details {
    max-width: 1000px;
    margin: 0 auto;
    animation: fadeIn 0.5s ease-out;
}

.app-header {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
    background-color: var(--background-light);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--card-shadow);
}

.app-icon {
    width: 150px;
    height: 150px;
    border-radius: 20px;
    object-fit: cover;
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-speed);
}

.app-icon:hover {
    transform: scale(1.05);
}

.app-info {
    flex: 1;
}

.app-info h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.app-meta {
    display: flex;
    gap: 2rem;
    margin: 1.5rem 0;
    color: var(--text-secondary);
}

.screenshot-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 1.5rem 0;
}

.screenshot-gallery img {
    width: 100%;
    border-radius: 12px;
    transition: transform var(--transition-speed);
    cursor: pointer;
}

.screenshot-gallery img:hover {
    transform: scale(1.05);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.info-item {
    background-color: var(--background-light);
    padding: 1rem;
    border-radius: 8px;
}

/* Upload Form Styles */
.upload-page {
    max-width: 800px;
    margin: 0 auto;
    animation: fadeIn 0.5s ease-out;
}

.upload-form {
    background-color: var(--background-light);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--card-shadow);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--background-dark);
    color: var(--text-primary);
    transition: all var(--transition-speed);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.2);
}

.form-group small {
    display: block;
    margin-top: 0.5rem;
    color: var(--text-secondary);
}

/* Button Styles */
.btn {
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-speed);
    text-decoration: none;
    display: inline-block;
    font-weight: 600;
    text-align: center;
}

.download-btn {
    background-color: var(--success-color);
    color: white;
    width: 100%;
    margin-top: 1rem;
}

.download-btn:hover {
    background-color: #00a884;
    transform: translateY(-2px);
}

.submit-btn {
    background-color: var(--primary-color);
    color: white;
    width: 100%;
    font-size: 1.1rem;
    padding: 1rem;
}

.submit-btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
}

/* Footer Styles */
footer {
    background-color: var(--background-light);
    padding: 2rem;
    text-align: center;
    margin-top: 3rem;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        transform: translateX(-100%);
    }
    to {
        transform: translateX(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 1rem;
    }

    .app-meta {
        justify-content: center;
        flex-wrap: wrap;
    }

    .nav-links {
        display: none;
    }

    .search-container {
        flex-direction: column;
    }

    .search-container button {
        width: 100%;
    }

    h2 {
        font-size: 1.5rem;
    }
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 50px;
    height: 50px;
    border: 3px solid var(--border-color);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Utility Classes */
.hidden {
    display: none;
}

.fade-in {
    animation: fadeIn 0.5s ease-out;
}

.slide-in {
    animation: slideIn 0.5s ease-out;
}