.white-line-bottom {
    margin-bottom: 40px;
}

.white-line-left_and_right {
    margin-left: 10%;
    margin-right: 10%;
}

:root {
    --primary: #4e6fff;
    --secondary: #ff6b8b;
    --accent: #6affd8;
    --light: #f8f9fa;
    --dark: #2d3748;
    --gray: #718096;
    --success: #48bb78;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/*body {
    background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
    color: var(--dark);
    line-height: 1.6;
    padding: 20px;
    min-height: 100vh;
}*/

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

header {
    text-align: center;
    padding: 30px 0;
    margin-bottom: 30px;
    animation: fadeInDown 0.8s ease;
}

.logo {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 20px rgba(78, 111, 255, 0.3);
}

    .logo i {
        font-size: 60px;
        color: white;
    }

h1 {
    font-size: 2.8rem;
    margin-bottom: 10px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.subtitle {
    font-size: 1.2rem;
    color: var(--gray);
    max-width: 600px;
    margin: 0 auto;
}

.version-selector {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin: 30px 0;
    flex-wrap: wrap;
}

.version-btn {
    padding: 10px 25px;
    background: white;
    border: 2px solid #e2e8f0;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

    .version-btn:hover {
        transform: translateY(-3px);
        box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
    }

    .version-btn.active {
        background: var(--primary);
        color: white;
        border-color: var(--primary);
        box-shadow: 0 6px 12px rgba(78, 111, 255, 0.3);
    }

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
    animation: fadeInUp 0.6s ease;
}

    .card:hover {
        transform: translateY(-10px);
        box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
    }

.card-header {
    padding: 25px;
    background: linear-gradient(135deg, var(--primary), #6a8cff);
    color: white;
}

    .card-header h2 {
        font-size: 1.8rem;
        display: flex;
        align-items: center;
        gap: 12px;
    }

.card-body {
    padding: 25px;
}

.version-info {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 10px 0;
    border-bottom: 1px solid #edf2f7;
}

    .info-item:last-child {
        border-bottom: none;
    }

    .info-item i {
        width: 40px;
        height: 40px;
        background: #ebf4ff;
        border-radius: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--primary);
        font-size: 18px;
    }

.info-content h3 {
    font-size: 1.1rem;
    margin-bottom: 3px;
}

.info-content p {
    color: var(--gray);
    font-size: 0.95rem;
}

.update-log {
    list-style: none;
}

    .update-log li {
        padding: 15px 0;
        border-bottom: 1px dashed #e2e8f0;
        display: flex;
        gap: 15px;
    }

        .update-log li:last-child {
            border-bottom: none;
        }

.update-icon {
    color: var(--success);
    font-size: 18px;
    flex-shrink: 0;
    margin-top: 3px;
}

.update-content h4 {
    font-size: 1.1rem;
    margin-bottom: 5px;
}

.update-content p {
    color: var(--gray);
    font-size: 0.95rem;
}

.download-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.download-item {
    display: flex;
    align-items: center;
    padding: 18px;
    background: #f8fafc;
    border-radius: 15px;
    transition: all 0.3s ease;
}

    .download-item:hover {
        background: #edf2f7;
        transform: translateX(5px);
    }

.os-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-right: 20px;
    flex-shrink: 0;
}

.windows .os-icon {
    background: #0078d7;
    color: white;
}

.mac .os-icon {
    background: #000000;
    color: white;
}

.linux .os-icon {
    background: #f1502f;
    color: white;
}

.download-info {
    flex-grow: 1;
}

    .download-info h4 {
        font-size: 1.2rem;
        margin-bottom: 5px;
    }

    .download-info p {
        color: var(--gray);
        font-size: 0.9rem;
    }

.download-btn {
    padding: 10px 25px;
    background: var(--primary);
    color: white;
    border-radius: 10px;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
}

    .download-btn:hover {
        background: #3a5af5;
        box-shadow: 0 5px 15px rgba(78, 111, 255, 0.3);
    }

.notes {
    background: white;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    margin-top: 20px;
    animation: fadeInUp 0.8s ease;
}

    .notes h2 {
        font-size: 1.5rem;
        margin-bottom: 20px;
        color: var(--primary);
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .notes ul {
        padding-left: 25px;
        margin-bottom: 20px;
    }

    .notes li {
        margin-bottom: 12px;
        color: var(--dark);
    }

    .notes p {
        color: var(--gray);
        line-height: 1.7;
    }

footer {
    text-align: center;
    padding: 30px 0;
    color: var(--gray);
    font-size: 0.95rem;
    margin-top: 30px;
    border-top: 1px solid #e2e8f0;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 768px) {
    .content-grid {
        grid-template-columns: 1fr;
    }

    h1 {
        font-size: 2.2rem;
    }

    .card {
        margin: 0 10px;
    }
}