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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #ffffff;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 10px;
}

.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

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

.nav-logo h2 {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    font-size: 1.5rem;
}

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

.nav-menu a {
    text-decoration: none;
    color: #666;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: #667eea;
}


.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

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

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: #666;
    margin-bottom: 1.5rem;
    font-weight: 400;
}

.hero-description {
    font-size: 1.1rem;
    color: #555;
    line-height: 1.8;
    margin-bottom: 2rem;
}

.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 15px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.4);
}

.app-mockup {
    position: relative;
    perspective: 1000px;
}

.mockup-screen {
    width: 300px;
    height: 600px;
    background: #1a1a1a;
    border-radius: 40px;
    padding: 20px;
    box-shadow: 
        0 20px 60px rgba(0, 0, 0, 0.3),
        inset 0 0 0 1px rgba(255, 255, 255, 0.1);
    transform: rotateY(-5deg) rotateX(5deg);
    transition: transform 0.3s ease;
}

.app-mockup:hover .mockup-screen {
    transform: rotateY(0deg) rotateX(0deg);
}

.screen-content {
    background: #2d2d2d;
    height: 100%;
    border-radius: 30px;
    padding: 30px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    text-align: center;
}

.ai-avatar {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    margin-bottom: 20px;
    position: relative;
}

.ai-avatar::after {
    content: '🤖';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2rem;
}

.message-bubble {
    background: rgba(102, 126, 234, 0.2);
    padding: 15px 20px;
    border-radius: 20px;
    margin-top: 15px;
    border: 1px solid rgba(102, 126, 234, 0.3);
}

.features {
    padding: 80px 0;
    background: #f8f9fa;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.features-list {
    list-style: none;
    max-width: 600px;
    margin: 0 auto;
}

.features-list li {
    background: white;
    padding: 20px;
    margin-bottom: 15px;
    border-radius: 15px;
    font-size: 1.1rem;
    font-weight: 500;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.features-list li:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.screenshots {
    padding: 80px 0;
}

.screenshot-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.screenshot-item {
    text-align: center;
}

.screenshot-mockup {
    width: 250px;
    height: 500px;
    background: #1a1a1a;
    border-radius: 30px;
    margin: 0 auto 1rem;
    padding: 15px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
}

.mockup-header {
    height: 40px;
    background: #2d2d2d;
    border-radius: 20px 20px 0 0;
    margin-bottom: 15px;
}

.mockup-content {
    height: calc(100% - 55px);
    background: #2d2d2d;
    border-radius: 0 0 20px 20px;
    padding: 20px;
    color: white;
}

.chat-interface .chat-message {
    background: rgba(102, 126, 234, 0.3);
    padding: 10px 15px;
    border-radius: 15px;
    margin-bottom: 10px;
    font-size: 0.9rem;
}

.chat-interface .chat-message.user {
    background: rgba(255, 255, 255, 0.1);
    margin-left: 20px;
}

.chat-interface .chat-message.ai {
    background: rgba(102, 126, 234, 0.3);
    margin-right: 20px;
}

.task-interface .task-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 12px 15px;
    border-radius: 10px;
    margin-bottom: 10px;
    font-size: 0.9rem;
}

.settings-interface .setting-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 12px 15px;
    border-radius: 10px;
    margin-bottom: 10px;
    font-size: 0.9rem;
}

.download {
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
}

.download .section-title {
    color: white;
    -webkit-text-fill-color: white;
    background: none;
}

.download-description {
    font-size: 1.2rem;
    margin-bottom: 3rem;
    opacity: 0.9;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.download-button {
    display: inline-flex;
    background: #000;
    padding: 0;
    border-radius: 18px;
    text-decoration: none;
    color: #333;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    box-shadow: 
        0 12px 35px rgba(0, 0, 0, 0.18),
        0 3px 10px rgba(0, 0, 0, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.6);
    overflow: hidden;
    position: relative;
    backdrop-filter: blur(10px);
}

.download-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.6), 
        rgba(255, 255, 255, 0.3), 
        transparent);
    transition: left 0.8s ease;
    z-index: 1;
}

.download-button:active {
    transform: translateY(-1px) scale(1.01);
    transition: all 0.1s ease;
}

.button-content {
    display: flex;
    align-items: center;
    padding: 10px 20px;
    gap: 10px;
    position: relative;
    z-index: 2;
}

.button-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    padding: 10px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.button-icon::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.6s ease;
}


.button-icon svg {
    width: 28px;
    height: 28px;
    filter: 
        drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3))
        brightness(1.1);
    transition: all 0.3s ease;
}

.download-button:hover .button-icon svg {
    filter: 
        drop-shadow(0 3px 6px rgba(0, 0, 0, 0.4))
        brightness(1.2);
}

.button-text {
    display: flex;
    flex-direction: column;
    text-align: left;
    line-height: 1.15;
    gap: 2px;
}

.small-text {
    font-size: 0.7rem;
    opacity: 0.9;
    font-weight: 600;
    letter-spacing: 0.8px;
    text-transform: uppercase;
    color: #fff;
    transition: all 0.3s ease;
}



.large-text {
    font-size: 1.5rem;
    font-weight: 800;
    background-clip: text;
    letter-spacing: -0.5px;
    transition: all 0.3s ease;
    color: #fff;
}


.footer {
    background: #1a1a1a;
    color: white;
    padding: 40px 0 20px;
}

.footer-content {
    display: flex;
    justify-content: center;
    align-items: center;
}

.footer-section h3 {
    color: #667eea;
    margin-bottom: 0.5rem;
}

.footer-section p {
    opacity: 0.7;
    line-height: 1.6;
    margin: 0;
}

@media (max-width: 768px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .nav-menu {
        display: none;
    }
    
    .screenshot-grid {
        grid-template-columns: 1fr;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .mockup-screen {
        width: 250px;
        height: 500px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
}