body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #0f0f23 0%, #1a1a2e 50%, #16213e 100%);
    color: #fff;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.8);
}

.container {
    max-width: 900px;
    margin: 20px;
    padding: 50px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
}

.container::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, #ff6b6b, #0c0d27, #1b145e, #5e5d94);
    border-radius: 22px;
    z-index: -1;
    animation: gradientShift 4s ease infinite;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

header {
    text-align: center;
    margin-bottom: 40px;
}

h1 {
    font-size: 3.5em;
    margin-bottom: 10px;
    text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.5), 0 0 20px rgba(255, 255, 255, 0.5);
    background: linear-gradient(45deg, #fff, #f0f0f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    -webkit-text-stroke: 2px rgba(0, 0, 0, 0.8);
    text-stroke: 2px rgba(0, 0, 0, 0.8);
}

header p {
    font-size: 1.3em;
    opacity: 0.9;
    font-weight: 300;
}

main {
    text-align: center;
}

.description {
    margin-bottom: 40px;
}

.description p {
    font-size: 1.2em;
    line-height: 1.7;
    margin-bottom: 25px;
    opacity: 0.95;
}

ul {
    list-style-type: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
    margin-bottom: 30px;
}

ul li {
    background: rgba(255, 255, 255, 0.1);
    padding: 15px;
    border-radius: 10px;
    font-size: 1em;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

ul li:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.download-btn {
    background: linear-gradient(45deg, #ff6b6b, #ee5a24);
    color: white;
    border: none;
    padding: 18px 40px;
    font-size: 1.3em;
    font-weight: bold;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(255, 107, 107, 0.4);
    margin: 30px 0;
    position: relative;
    overflow: hidden;
}

.download-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.download-btn:hover::before {
    left: 100%;
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(255, 107, 107, 0.6);
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature {
    background: rgba(255, 255, 255, 0.1);
    padding: 25px;
    border-radius: 15px;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature.fade-in {
    animation-play-state: running;
}

.feature h3 {
    font-size: 1.4em;
    margin-bottom: 10px;
    color: #4ecdc4;
}

.feature p {
    font-size: 1em;
    line-height: 1.5;
    opacity: 0.9;
}

footer {
    text-align: center;
    margin-top: 50px;
    opacity: 0.7;
    font-size: 0.9em;
}

@media (max-width: 768px) {
    .container {
        padding: 30px;
    }

    h1 {
        font-size: 2.5em;
    }

    ul {
        grid-template-columns: 1fr;
    }

    .features {
        grid-template-columns: 1fr;
    }
}