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

:root {
    --primary-color: #2563eb;
    --secondary-color: #7c3aed;
    --r18-color: #dc2626;
    --dark-bg: #1e293b;
    --light-bg: #f8fafc;
    --text-dark: #1e293b;
    --text-light: #64748b;
    --border-color: #e2e8f0;
}

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

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

/* Header & Navigation */
header {
    background: var(--dark-bg);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar {
    position: relative;
}

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

.logo h1 {
    font-size: 1.8rem;
    color: white;
    margin-bottom: 0.25rem;
}

.tagline {
    font-size: 0.85rem;
    color: #94a3b8;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    transition: color 0.3s;
    font-weight: 500;
}

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 6rem 0;
    text-align: center;
}

.hero-content h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero-content p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.btn {
    padding: 1rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
    display: inline-block;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

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

.btn-secondary {
    background: rgba(255,255,255,0.2);
    color: white;
    border: 2px solid white;
}

/* Features Section */
.features {
    padding: 5rem 0;
    background: var(--light-bg);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.07);
    transition: transform 0.3s, box-shadow 0.3s;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0,0,0,0.15);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.feature-card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.feature-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.r18-card {
    border-top: 4px solid var(--r18-color);
}

.r18-card .feature-link {
    color: var(--r18-color);
}

/* Apps Grid */
.apps-section {
    padding: 4rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.section-header .warning {
    color: var(--r18-color);
    font-weight: 600;
    font-size: 1.2rem;
}

.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.app-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.07);
    transition: transform 0.3s, box-shadow 0.3s;
}

.app-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0,0,0,0.15);
}

.app-screenshot {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: var(--light-bg);
}

.app-content {
    padding: 1.5rem;
}

.app-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

.app-content p {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.app-link {
    display: inline-block;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    margin-top: 1rem;
}

.app-link:hover {
    text-decoration: underline;
}

/* Contact Form */
.contact-section {
    padding: 4rem 0;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.07);
}

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

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

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

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

.btn-submit {
    background: var(--primary-color);
    color: white;
    padding: 1rem 2rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

.btn-submit:hover {
    background: #1d4ed8;
}

.alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #6ee7b7;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

/* Footer */
footer {
    background: var(--dark-bg);
    color: white;
    padding: 2rem 0;
    text-align: center;
    margin-top: 4rem;
}

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

/* Admin Styles */
.admin-header {
    background: var(--dark-bg);
    color: white;
    padding: 1.5rem 0;
    margin-bottom: 2rem;
}

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

.admin-nav ul {
    display: flex;
    list-style: none;
    gap: 1.5rem;
}

.admin-nav a {
    color: white;
    text-decoration: none;
}

.admin-section {
    padding: 2rem 0;
}

.admin-table {
    width: 100%;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.admin-table table {
    width: 100%;
    border-collapse: collapse;
}

.admin-table th,
.admin-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.admin-table th {
    background: var(--light-bg);
    font-weight: 600;
}

.admin-table img {
    max-width: 100px;
    height: auto;
    border-radius: 4px;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    margin-right: 0.5rem;
}

.btn-danger {
    background: var(--r18-color);
    color: white;
}

.btn-danger:hover {
    background: #b91c1c;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .feature-grid,
    .apps-grid {
        grid-template-columns: 1fr;
    }
}