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

html {
    background-color: #F8F8F8;
}

body {
    font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: linear-gradient(180deg, #FFFFFF 0%, #F8F8F8 100%);
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #000000;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background 0.3s ease, color 0.3s ease;
    padding-env: safe-area-inset-top safe-area-inset-right safe-area-inset-bottom safe-area-inset-left;
}

.container {
    width: 100%;
    max-width: 600px;
    padding: 40px 20px;
    text-align: center;
}

header {
    margin-bottom: 80px;
}

.title-logo {
    height: 20px;
    width: auto;
    transition: filter 0.3s ease;
}

main {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 40px;
}

.app-icon-container {
    width: 180px;
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.app-icon {
    width: 100%;
    height: 100%;
    border-radius: 40px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.app-icon:hover {
    transform: scale(1.05);
    box-shadow: 0 20px 40px rgba(202, 105, 220, 0.3);
}

.description {
    max-width: 450px;
}

.description h1 {
    font-size: 32px;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.description p {
    font-size: 20px;
    font-weight: 400;
    line-height: 1.4;
    color: #333333;
    letter-spacing: -0.01em;
    transition: color 0.3s ease;
}

.buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 20px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 28px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    min-width: 140px;
}

.btn-download {
    background: linear-gradient(135deg, #E300FF 0%, #D976CA 100%);
    color: #F2F2F6;
    border: 1.5px solid #F2F2F6;
    width: 45px;
    height: 45px;
    min-width: 45px;
    max-width: 45px;
    min-height: 45px;
    max-height: 45px;
    padding: 0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    aspect-ratio: 1 / 1;
}

.btn-download svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.btn-download:hover {
    background: linear-gradient(135deg, #E300FF 0%, #D976CA 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(227, 0, 255, 0.3);
}

.btn-support {
    background: #F2F2F6;
    color: #000000;
    border: 1.5px solid #000000;
}

.btn-support:hover {
    background: #E8E8EC;
    border-color: #000000;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 30px 20px;
    }
    
    header {
        margin-bottom: 60px;
    }
    
    .app-icon-container {
        width: 140px;
        height: 140px;
    }
    
    .description h1 {
        font-size: 28px;
    }
    
    .description p {
        font-size: 18px;
    }
    
    .buttons {
        width: 100%;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 15px;
    }
}

@media (max-width: 480px) {
    .app-icon-container {
        width: 120px;
        height: 120px;
    }
    
    .description h1 {
        font-size: 24px;
    }
    
    .description p {
        font-size: 16px;
    }
    
    .buttons {
        flex-direction: row;
        align-items: center;
        justify-content: center;
        gap: 16px;
    }
    
    .btn-download {
        width: 45px !important;
        height: 45px !important;
        min-width: 45px !important;
        max-width: 45px !important;
        min-height: 45px !important;
        max-height: 45px !important;
        flex-shrink: 0;
    }
    
    .btn-support {
        width: auto;
        min-width: 140px;
        flex-shrink: 0;
    }
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
    html {
        background-color: #0A0A0A;
    }

    body {
        background: linear-gradient(180deg, #0A0A0A 0%, #1A1A1A 100%);
        color: #F2F2F6;
    }
    
    .title-logo {
        filter: invert(1) brightness(0.95);
    }
    
    .description p {
        color: #B8B8B8;
    }
    
    .app-icon:hover {
        box-shadow: 0 20px 40px rgba(202, 105, 220, 0.4);
    }
    
    .btn-support {
        background: #2A2A2A;
        color: #F2F2F6;
        border: 1.5px solid #4A4A4A;
    }
    
    .btn-support:hover {
        background: #3A3A3A;
        border-color: #5A5A5A;
        box-shadow: 0 4px 12px rgba(255, 255, 255, 0.05);
    }
    
    .btn-download {
        border: 1.5px solid rgba(242, 242, 246, 0.3);
    }
    
    .btn-download:hover {
        box-shadow: 0 8px 20px rgba(227, 0, 255, 0.4);
    }
}