/* ===== VKMuX Site Styles ===== */
/* Premium dark design. Royal Blue accent (#4169e1). */

* {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 5rem;
}

body {
    margin: 0;
    overflow-x: hidden;
}

::selection {
    background: rgba(65, 105, 225, 0.3);
    color: white;
}

/* ===== Navbar ===== */
#navbar {
    background: rgba(9, 9, 11, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

/* ===== Scroll animations ===== */
.js-reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.js-reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== OS selector buttons ===== */
.os-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    color: #71717a;
    padding: 0.625rem 1.25rem;
    border-radius: 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.15s ease;
}

.os-btn:hover {
    background: rgba(255, 255, 255, 0.06);
    color: #a1a1aa;
}

.os-btn.active {
    background: rgba(65, 105, 225, 0.15);
    border-color: rgba(65, 105, 225, 0.3);
    color: #a3bffa;
}

/* ===== Download panels ===== */
.download-panel.hidden {
    display: none;
}

/* ===== Monospace font ===== */
.font-mono {
    font-family: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
}

/* ===== Scroll indicator bounce ===== */
@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(4px); }
}

/* ===== Download links availability (set by JS) ===== */
a[data-download][data-ready="false"] {
    opacity: 0.55;
    pointer-events: none;
    cursor: not-allowed;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.15);
}

/* ===== Code blocks ===== */
code {
    font-family: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
    font-size: 0.85em;
    background: rgba(255, 255, 255, 0.05);
    padding: 0.15em 0.4em;
    border-radius: 4px;
    color: #a3bffa;
    word-break: break-word;
}

pre {
    margin: 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

pre code {
    display: block;
    padding: 0.875rem 1rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 10px;
    font-size: 0.75rem;
    line-height: 1.6;
    color: #d4d4d8;
    white-space: pre;
    word-break: normal;
    overflow-x: auto;
}

/* ===== Page transition ===== */
main {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ===== Mobile responsive ===== */

/* --- Up to 768px (tablets + large phones) --- */
@media (max-width: 768px) {
    .os-btn {
        padding: 0.5rem 0.875rem;
        font-size: 0.8125rem;
    }

    pre code {
        font-size: 0.7rem;
        padding: 0.75rem;
    }
}

/* --- Up to 640px (phones) --- */
@media (max-width: 640px) {
    /* Kill glow backgrounds on mobile */
    .glow-bg {
        display: none !important;
    }

    /* Prevent ANY child from expanding page */
    * {
        max-width: 100%;
    }

    /* Sections must not overflow */
    section, footer {
        overflow: hidden;
    }

    /* Navbar */
    #navbar .px-6 {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    /* Sections */
    .site-section {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    /* OS tabs */
    #osSelector {
        flex-wrap: wrap;
        gap: 0.375rem;
    }

    .os-btn {
        padding: 0.5rem 0.75rem;
        font-size: 0.75rem;
        border-radius: 0.625rem;
        gap: 0.375rem;
    }

    .os-btn svg {
        width: 14px;
        height: 14px;
    }

    /* Download panels */
    .download-panel {
        padding: 1rem !important;
        border-radius: 1rem !important;
    }

    .download-panel .dl-grid {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
    }

    .download-panel .dl-item {
        padding: 0.75rem !important;
        gap: 0.75rem !important;
    }

    .download-panel .dl-icon {
        width: 2.25rem !important;
        height: 2.25rem !important;
    }

    .download-panel .dl-icon svg {
        width: 1rem;
        height: 1rem;
    }

    /* Pre blocks: clip inside parent */
    pre {
        overflow-x: auto;
        max-width: 100%;
    }

    /* Flex children must be able to shrink */
    .flex > div {
        min-width: 0;
    }

    /* Code blocks */
    pre code {
        font-size: 0.6875rem;
        padding: 0.625rem 0.75rem;
        border-radius: 0.625rem;
    }

    /* Footer */
    footer .flex {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    footer .gap-6 {
        gap: 0.75rem;
    }
}

/* --- Up to 400px (small phones) --- */
@media (max-width: 400px) {
    #osSelector {
        gap: 0.25rem;
    }

    .os-btn {
        padding: 0.4rem 0.6rem;
        font-size: 0.6875rem;
    }

    .download-panel {
        padding: 0.75rem !important;
    }

    .download-panel .dl-item {
        padding: 0.625rem !important;
    }
}