/* Modern Reset & Custom Properties */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #8b5cf6;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #06b6d4;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-dark: #0f172a;
    
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    width: 90%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

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

a:hover {
    color: var(--primary-dark);
}

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

h1, h2, h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 700;
    letter-spacing: -0.025em;
}

ul {
    list-style-position: inside;
}

/* Header & Navigation */
header {
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1e293b 100%);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-lg);
}

header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header .logo {
    font-size: 1.75rem;
    font-weight: 800;
    background: linear-gradient(135deg, #ffffff 0%, #a5b4fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.05em;
    transition: var(--transition);
}

header .logo:hover {
    transform: scale(1.05);
    text-decoration: none;
}

header ul {
    list-style: none;
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

header ul li a {
    color: #cbd5e1;
    padding: 0.625rem 1rem;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: var(--transition);
    position: relative;
}

header ul li a:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
    text-decoration: none;
    transform: translateY(-1px);
}

header ul li a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 80%;
    height: 2px;
    background: var(--primary-light);
    transition: transform 0.3s ease;
}

header ul li a:hover::before {
    transform: translateX(-50%) scaleX(1);
}

/* Main Content */
main.container {
    padding-top: 2rem;
    padding-bottom: 4rem;
    min-height: calc(100vh - 180px);
}

/* Footer */
footer {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: #94a3b8;
    text-align: center;
    padding: 2rem 0;
    margin-top: 4rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Modern Buttons */
.btn-primary, .btn-secondary, .btn-download, .btn-link, .btn-view-details, .btn-admin {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.9375rem;
    font-weight: 600;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    text-decoration: none;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

.btn-download {
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
    color: white;
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-link {
    background: linear-gradient(135deg, var(--info) 0%, #0891b2 100%);
    color: white;
}

.btn-link:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-view-details {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    font-weight: 500;
}

.btn-view-details:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Forms */
.styled-form fieldset {
    border: 2px solid var(--border-light);
    padding: 2rem;
    margin-bottom: 2rem;
    border-radius: var(--radius-lg);
    background: var(--bg-primary);
    box-shadow: var(--shadow-md);
}

.styled-form legend {
    font-weight: 700;
    padding: 0 1rem;
    color: var(--text-primary);
    font-size: 1.125rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9375rem;
}

.form-group input[type="text"],
.form-group input[type="url"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: var(--transition);
    background: var(--bg-primary);
    color: var(--text-primary);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.form-group .required {
    color: var(--danger);
}

.login-form {
    max-width: 440px;
    margin: 3rem auto;
    padding: 2.5rem;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

/* Messages */
.message {
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
    border-left: 4px solid;
    font-weight: 500;
}

.error-message {
    color: #991b1b;
    background-color: #fee2e2;
    border-color: var(--danger);
}

.success-message {
    color: #065f46;
    background-color: #d1fae5;
    border-color: var(--success);
}

.info-message {
    color: #155e75;
    background-color: #cffafe;
    border-color: var(--info);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 4rem 2rem;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
    border-radius: var(--radius-xl);
    margin-bottom: 3rem;
    border: 1px solid var(--border-light);
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.search-form {
    display: flex;
    max-width: 600px;
    margin: 2rem auto 0;
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.search-form input[type="search"] {
    flex-grow: 1;
    padding: 1rem 1.5rem;
    border: 2px solid var(--border-color);
    border-right: none;
    border-radius: var(--radius-lg) 0 0 var(--radius-lg);
    font-size: 1rem;
    background: var(--bg-primary);
}

.search-form input[type="search"]:focus {
    outline: none;
    border-color: var(--primary);
}

.search-form button {
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    border: none;
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

.search-form button:hover {
    transform: scale(1.02);
}

/* App Sections */
.app-section {
    margin-bottom: 4rem;
}

.app-section h2 {
    font-size: 2rem;
    padding-bottom: 1rem;
    margin-bottom: 2rem;
    position: relative;
    display: inline-block;
}

.app-section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 2px;
}

.app-section h2 i {
    margin-right: 0.75rem;
    color: var(--primary);
}

/* App Grid */
.app-grid, .search-results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.app-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.app-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.app-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.app-card:hover::before {
    transform: scaleX(1);
}

.app-card .app-logo-small {
    width: 72px;
    height: 72px;
    object-fit: contain;
    margin-bottom: 1rem;
    border-radius: var(--radius-md);
    padding: 0.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
}

.app-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    font-weight: 700;
}

.app-card h3 a {
    color: var(--text-primary);
    transition: var(--transition);
}

.app-card h3 a:hover {
    color: var(--primary);
}

.app-card .short-desc {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    flex-grow: 1;
    margin-bottom: 1.25rem;
    line-height: 1.6;
}

.app-card .price {
    font-weight: 700;
    color: var(--success);
    font-size: 1.125rem;
    margin-bottom: 1rem;
}

.app-card .btn-view-details {
    margin-top: auto;
    width: 100%;
}

/* Newly Listed Grid */
.newly-listed-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 1.25rem;
}

.newly-listed-item {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.newly-listed-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.newly-listed-item img {
    width: 64px;
    height: 64px;
    object-fit: contain;
    margin: 0 auto 0.75rem;
    border-radius: var(--radius-md);
    padding: 0.5rem;
    background: var(--bg-secondary);
}

.newly-listed-item span {
    display: block;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Category Grid */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
}

.category-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.category-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
}

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

.category-card h3 {
    position: relative;
    z-index: 1;
    margin-bottom: 0;
}

.category-card h3 a {
    color: var(--primary);
    font-size: 1.375rem;
    font-weight: 700;
}

.category-card p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
    position: relative;
    z-index: 1;
}

/* App Detail Page */
.app-detail-container {
    background: var(--bg-primary);
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-light);
}

.app-detail-top-section .category-info {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    margin-bottom: 2rem;
    border: 1px solid var(--border-light);
}

.app-detail-top-section .category-info h2 {
    color: var(--primary);
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

.app-detail-top-section .category-info p {
    font-size: 1rem;
    color: var(--text-secondary);
}

.app-detail-main {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2.5rem;
    margin-bottom: 2.5rem;
}

.app-info-card-detail .app-logo-large {
    width: 140px;
    height: 140px;
    object-fit: contain;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--bg-secondary);
    box-shadow: var(--shadow-md);
    float: left;
    margin-right: 2rem;
}

.app-info-card-detail h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.app-info-card-detail .short-description-detail {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    clear: left;
    line-height: 1.8;
}

.app-links a {
    margin-right: 1rem;
    margin-bottom: 1rem;
}

.app-links a i {
    margin-right: 0.5rem;
}

.app-stats-cards {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.stat-card {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border: 1px solid var(--border-light);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.stat-card:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.stat-card i {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 0.75rem;
    display: block;
}

.stat-card span {
    display: block;
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.stat-card strong {
    display: block;
    font-size: 1.5rem;
    color: var(--text-primary);
    font-weight: 700;
    margin-top: 0.25rem;
}

.app-description-card, .developer-info-card, .admin-actions-card {
    background: var(--bg-secondary);
    padding: 2rem;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
}

.app-description-card h2, .developer-info-card h2, .admin-actions-card h2 {
    font-size: 1.625rem;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
}

.app-description-card div, .developer-info-card p {
    line-height: 1.8;
    color: var(--text-secondary);
    font-size: 1rem;
}

.app-description-card ul {
    margin-left: 1.5rem;
    margin-top: 1rem;
}

.app-description-card li {
    margin-bottom: 0.5rem;
}

.category-page-header {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    padding: 2.5rem 2rem;
    margin-bottom: 3rem;
    border-left: 6px solid var(--primary);
    box-shadow: var(--shadow-md);
}

.category-page-header h1 {
    margin-top: 0;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-size: 2.5rem;
}

.category-page-header h1 i {
    margin-right: 1rem;
    color: var(--primary);
}

.category-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* Admin Actions */
.admin-actions-card .btn-admin {
    margin-right: 0.75rem;
    margin-bottom: 0.75rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.9375rem;
}

.admin-actions-card .btn-admin.active {
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

.admin-actions-card select {
    padding: 0.625rem 1rem;
    font-size: 0.9375rem;
    margin-right: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
}

.admin-actions-card button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.admin-actions-card .meta-info {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 1.5rem;
    background: var(--bg-tertiary);
    padding: 1rem;
    border-left: 3px solid var(--primary);
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 3rem;
}

.pagination a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1rem;
    text-decoration: none;
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: var(--transition);
    min-width: 42px;
}

.pagination a:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.pagination a.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    border-color: transparent;
}

.pagination a.disabled {
    opacity: 0.5;
    pointer-events: none;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .app-grid, .search-results-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    }
    
    .app-detail-main {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    header nav {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    header ul {
        flex-direction: column;
        width: 100%;
        gap: 0.5rem;
    }
    
    header ul li {
        width: 100%;
    }
    
    header ul li a {
        display: block;
        width: 100%;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .app-grid, .search-results-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
    
    .category-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .container {
        width: 95%;
        padding: 0 1rem;
    }
    
    .hero {
        padding: 2.5rem 1.5rem;
    }
    
    .hero h1 {
        font-size: 1.75rem;
    }
    
    .app-grid, .search-results-grid, .newly-listed-grid {
        grid-template-columns: 1fr;
    }
    
    .search-form {
        flex-direction: column;
    }
    
    .search-form input[type="search"] {
        border-radius: var(--radius-lg);
        border-right: 2px solid var(--border-color);
        margin-bottom: 0.75rem;
    }
    
    .search-form button {
        border-radius: var(--radius-lg);
    }
    
    .app-detail-container {
        padding: 1.5rem;
    }
    
    .app-info-card-detail .app-logo-large {
        float: none;
        margin: 0 auto 1.5rem;
    }
}


/* Captcha Specific Styles */
.captcha-group {
    display: grid;
    grid-template-columns: auto auto 1fr;
    gap: 1rem;
    align-items: center;
}

.captcha-group label {
    grid-column: 1 / -1;
    margin-bottom: 0.5rem;
}

.captcha-group img {
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.5rem;
    background: var(--bg-secondary);
    box-shadow: var(--shadow-sm);
    height: 50px;
    width: auto;
}

.captcha-group #refreshCaptcha {
    padding: 0.75rem 1rem;
    height: 50px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 50px;
}

.captcha-group #refreshCaptcha:hover {
    transform: rotate(180deg);
    transition: transform 0.4s ease;
}

.captcha-group input[type="text"] {
    max-width: 200px;
}

@media (max-width: 768px) {
    .captcha-group {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    
    .captcha-group img {
        justify-self: start;
    }
    
    .captcha-group #refreshCaptcha {
        width: 100%;
    }
    
    .captcha-group input[type="text"] {
        max-width: 100%;
    }
}