/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --accent-color: #06b6d4;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --border-color: #e5e7eb;
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-heavy: 0 10px 25px rgba(0, 0, 0, 0.1);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Background Animation */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(120, 219, 255, 0.3) 0%, transparent 50%);
    z-index: -1;
    animation: backgroundShift 20s ease-in-out infinite;
}

@keyframes backgroundShift {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(-10px, -10px) scale(1.1); }
    50% { transform: translate(10px, -5px) scale(0.9); }
    75% { transform: translate(-5px, 10px) scale(1.05); }
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--bg-primary);
}

.nav-logo i {
    color: var(--accent-color);
}

.nav-menu {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-link {
    color: var(--bg-primary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--accent-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.download-btn {
    background: var(--gradient-accent);
    padding: 10px 20px;
    border-radius: 25px;
    color: white !important;
    font-weight: 600;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--bg-primary);
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--bg-primary);
}

.gradient-text {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 15px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient-accent);
    color: white;
    box-shadow: var(--shadow-medium);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-heavy);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--bg-primary);
    border: 2px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.btn-large {
    padding: 20px 40px;
    font-size: 1.1rem;
}

/* Window Demo */
.window-demo {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-heavy);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.window-titlebar {
    background: rgba(255, 255, 255, 0.2);
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--glass-border);
}

.window-buttons {
    display: flex;
    gap: 8px;
}

.window-buttons span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    cursor: pointer;
}

.btn-minimize { background: #ffbd2e; }
.btn-maximize { background: #28ca42; }
.btn-close { background: #ff5f57; }

.window-title {
    color: var(--bg-primary);
    font-weight: 500;
    font-size: 0.9rem;
}

.window-content {
    height: 300px;
    position: relative;
    overflow: hidden;
}

.glass-effect {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, transparent 70%);
    border-radius: 50%;
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.5; }
    50% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.8; }
}

/* Section Styles */
section {
    padding: 80px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--bg-primary);
    margin-bottom: 15px;
}

.section-header p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
}

/* Features Section */
.features {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.feature-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(15px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s ease;
}

.feature-card:hover::before {
    left: 100%;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-heavy);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 2rem;
    color: white;
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--bg-primary);
    margin-bottom: 15px;
}

.feature-card p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

/* Installation Section */
.installation-steps {
    display: flex;
    flex-direction: column;
    gap: 30px;
    max-width: 800px;
    margin: 0 auto 50px;
}

.step {
    display: flex;
    align-items: flex-start;
    gap: 25px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(15px);
    border: 1px solid var(--glass-border);
    border-radius: 15px;
    padding: 30px;
    transition: all 0.3s ease;
}

.step:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-medium);
}

.step-number {
    width: 50px;
    height: 50px;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}

.step-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--bg-primary);
    margin-bottom: 10px;
}

.step-content p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

.warning-box {
    background: rgba(255, 193, 7, 0.1);
    border: 1px solid rgba(255, 193, 7, 0.3);
    border-radius: 15px;
    padding: 25px;
    display: flex;
    align-items: flex-start;
    gap: 15px;
    max-width: 800px;
    margin: 0 auto;
}

.warning-box i {
    color: #ffc107;
    font-size: 1.5rem;
    margin-top: 5px;
}

.warning-box h4 {
    color: #ffc107;
    font-weight: 600;
    margin-bottom: 8px;
}

.warning-box p {
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.6;
}

/* Usage Section */
.usage {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
}

.usage-tabs {
    max-width: 1000px;
    margin: 0 auto;
}

.tab-buttons {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tab-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--glass-border);
    color: var(--bg-primary);
    padding: 15px 25px;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    backdrop-filter: blur(10px);
}

.tab-btn.active,
.tab-btn:hover {
    background: var(--gradient-accent);
    color: white;
    transform: translateY(-2px);
}

.tab-content {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(15px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 40px;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.setting-item {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 15px;
    padding: 25px;
    transition: all 0.3s ease;
}

.setting-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.setting-item h4 {
    color: var(--bg-primary);
    font-weight: 600;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.setting-item h4 i {
    color: var(--accent-color);
}

.setting-item p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.5;
}

/* Troubleshooting Section */
.troubleshooting-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.issue-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(15px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 30px;
    transition: all 0.3s ease;
}

.issue-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.issue-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.issue-header i {
    font-size: 1.5rem;
    color: var(--accent-color);
}

.issue-header h3 {
    color: var(--bg-primary);
    font-weight: 600;
}

.issue-card ul {
    list-style: none;
    padding: 0;
}

.issue-card li {
    color: rgba(255, 255, 255, 0.8);
    padding: 8px 0;
    position: relative;
    padding-left: 20px;
}

.issue-card li::before {
    content: '•';
    color: var(--accent-color);
    position: absolute;
    left: 0;
    font-weight: bold;
}

.error-messages {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(15px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 40px;
}

.error-messages h3 {
    color: var(--bg-primary);
    font-weight: 600;
    margin-bottom: 25px;
    text-align: center;
}

.error-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.error-item {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 15px;
    padding: 20px;
}

.error-item code {
    background: rgba(0, 0, 0, 0.3);
    color: #ff6b6b;
    padding: 5px 10px;
    border-radius: 5px;
    font-family: 'Courier New', monospace;
    font-weight: 600;
    display: block;
    margin-bottom: 10px;
}

.error-item p {
    color: rgba(255, 255, 255, 0.8);
    margin: 0;
}

/* Requirements Section */
.requirements {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
}

.requirements-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    max-width: 800px;
    margin: 0 auto;
}

.requirement-item {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(15px);
    border: 1px solid var(--glass-border);
    border-radius: 15px;
    padding: 25px;
    display: flex;
    align-items: center;
    gap: 15px;
    transition: all 0.3s ease;
}

.requirement-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

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

.requirement-item span {
    color: var(--bg-primary);
    font-weight: 500;
}

/* Download Section */
.download {
    text-align: center;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
}

.download-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--bg-primary);
    margin-bottom: 20px;
}

.download-content p {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.download-info {
    margin-top: 30px;
}

.download-info p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

/* Footer */
.footer {
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--glass-border);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3,
.footer-section h4 {
    color: var(--bg-primary);
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    display: block;
    margin-bottom: 10px;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--glass-border);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .installation-steps {
        gap: 20px;
    }
    
    .step {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }
    
    .tab-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .tab-btn {
        width: 100%;
        max-width: 300px;
    }
    
    .troubleshooting-grid {
        grid-template-columns: 1fr;
    }
    
    .requirements-list {
        grid-template-columns: 1fr;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .download-content h2 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 0.9rem;
    }
    
    .feature-card {
        padding: 30px 20px;
    }
    
    .step {
        padding: 20px;
    }
    
    .tab-content {
        padding: 25px;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Loading Animation */
.loading {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.loading.loaded {
    opacity: 1;
    transform: translateY(0);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-accent);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}