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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Segoe UI Variable', system-ui, -apple-system, sans-serif;
    background-color: #0A0B10;
    color: #FFFFFF;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

a {
    text-decoration: none;
    color: inherit;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    padding: 1.25rem 0;
    background: rgba(10, 11, 16, 0.75);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-back-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.5rem 1.1rem;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: #FFFFFF;
    transition: all 0.3s;
}

.nav-back-btn:hover {
    border-color: rgba(168, 85, 247, 0.4);
    background: rgba(168, 85, 247, 0.08);
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    transition: opacity 0.3s;
}

.logo:hover {
    opacity: 0.8;
}

.logo span {
    color: #A855F7;
}

.download-hero {
    padding: 10rem 0 3rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.download-glow {
    position: absolute;
    top: -30%;
    left: 50%;
    transform: translateX(-50%);
    width: 700px;
    height: 700px;
    background: radial-gradient(circle at center, rgba(168, 85, 247, 0.1) 0%, transparent 60%);
    pointer-events: none;
}

.download-hero-content {
    position: relative;
    z-index: 1;
}

.download-hero .tag {
    display: inline-block;
    padding: 0.35rem 1.1rem;
    border-radius: 100px;
    background: rgba(168, 85, 247, 0.08);
    border: 1px solid rgba(168, 85, 247, 0.15);
    color: #A855F7;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    margin-bottom: 1.5rem;
}

.download-hero h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 900;
    letter-spacing: -0.04em;
    line-height: 1.1;
    margin-bottom: 1rem;
}

.download-hero h1 span {
    color: #A855F7;
}

.download-hero-desc {
    color: #94A3B8;
    font-size: 1.1rem;
    max-width: 500px;
    margin: 0 auto;
    line-height: 1.6;
}

.version-select {
    padding: 2rem 0 1rem;
}

.version-tabs {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.version-tab {
    padding: 0.5rem 1.25rem;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: transparent;
    color: #94A3B8;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s;
}

.version-tab:hover:not(:disabled) {
    border-color: rgba(168, 85, 247, 0.3);
    color: #FFFFFF;
}

.version-tab.active {
    background: rgba(168, 85, 247, 0.12);
    border-color: #A855F7;
    color: #A855F7;
}

.version-tab:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.version-new {
    display: inline-block;
    padding: 0.05rem 0.35rem;
    border-radius: 3px;
    font-size: 0.6rem;
    font-weight: 700;
    background: rgba(239, 68, 68, 0.15);
    color: #EF4444;
    margin-left: 0.3rem;
    vertical-align: middle;
    text-transform: uppercase;
}

.platforms {
    padding: 2rem 0 5rem;
}

.platforms-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
    max-width: 800px;
    margin: 0 auto;
}

.platform-card {
    background: #161822;
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: 16px;
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    transition: all 0.3s;
}

.platform-card.active {
    border-color: rgba(168, 85, 247, 0.15);
}

.platform-card.active:hover {
    border-color: rgba(168, 85, 247, 0.3);
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
}

.platform-card.coming-soon {
    opacity: 0.5;
}

.platform-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    color: #A855F7;
}

.platform-header h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: #FFFFFF;
    margin-bottom: 0.15rem;
}

.platform-badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    background: rgba(34, 197, 94, 0.12);
    color: #22C55E;
}

.badge-soon {
    background: rgba(234, 179, 8, 0.12);
    color: #EAB308;
}

.badge-alpha {
    background: rgba(239, 68, 68, 0.12);
    color: #EF4444;
}

.platform-desc {
    color: #94A3B8;
    font-size: 0.85rem;
    line-height: 1.5;
    margin-bottom: 1rem;
    flex: 1;
}

.platform-meta {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.platform-size,
.platform-arch {
    font-size: 0.75rem;
    color: #94A3B8;
    background: rgba(255, 255, 255, 0.04);
    padding: 0.2rem 0.55rem;
    border-radius: 4px;
}

.platform-btn {
    width: 100%;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.85rem 1.5rem;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    font-family: inherit;
    text-decoration: none;
}

.btn-primary {
    background: #A855F7;
    color: #FFFFFF;
    box-shadow: 0 4px 20px rgba(168, 85, 247, 0.25);
}

.btn-primary:hover {
    background: #7E22CE;
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(168, 85, 247, 0.35);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-disabled {
    background: rgba(255, 255, 255, 0.04);
    color: #94A3B8;
    cursor: not-allowed;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.download-info {
    padding: 0 0 6rem;
}

.info-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    max-width: 800px;
    margin: 0 auto;
}

.info-card {
    background: #161822;
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: 14px;
    padding: 1.5rem;
}

.info-card h4 {
    font-size: 0.9rem;
    font-weight: 700;
    color: #A855F7;
    margin-bottom: 0.75rem;
}

.info-card ul {
    list-style: none;
}

.info-card li {
    font-size: 0.85rem;
    color: #94A3B8;
    padding: 0.2rem 0;
    line-height: 1.5;
}

.info-card li::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: #A855F7;
    margin-right: 0.5rem;
    vertical-align: middle;
    opacity: 0.5;
}

.info-card a {
    color: #A855F7;
    text-decoration: none;
}

.info-card a:hover {
    text-decoration: underline;
}

.footer {
    padding: 2.5rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.04);
    text-align: center;
}

.footer p {
    color: #94A3B8;
    font-size: 0.85rem;
}

.footer a {
    color: #A855F7;
    text-decoration: none;
    transition: opacity 0.3s;
}

.footer a:hover {
    opacity: 0.8;
}

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

    .info-cards {
        grid-template-columns: 1fr;
    }

    .download-hero {
        padding: 7rem 0 2rem;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 1.25rem;
    }

    .version-tabs {
        gap: 0.35rem;
    }

    .version-tab {
        padding: 0.4rem 0.9rem;
        font-size: 0.8rem;
    }

    .platforms {
        padding: 1.5rem 0 3rem;
    }

    .platform-card {
        padding: 1.25rem;
    }

    .download-info {
        padding: 0 0 4rem;
    }
}