/*
 * VolumeLogic shared site system
 * Load after page-specific styles so these shared primitives stay consistent.
 * No font, image or framework requests: the layer is intentionally lightweight.
 */

:root {
    color-scheme: dark;
    --vl-bg: #000;
    --vl-surface: #0a0a0a;
    --vl-surface-raised: #141414;
    --vl-surface-hover: #1a1a1a;
    --vl-text: #fff;
    --vl-text-soft: #d9e1ea;
    --vl-text-muted: #a3a3a3;
    --vl-border: #292929;
    --vl-border-strong: #3a3a3a;
    --vl-brand: #0096ff;
    --vl-brand-hover: #35adff;
    --vl-brand-ink: #00131f;
    --vl-success: #22c55e;
    --vl-focus: #66c2ff;

    --vl-font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
        "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --vl-text-xs: 0.78rem;
    --vl-text-sm: 0.9rem;
    --vl-text-base: 1rem;
    --vl-text-lg: clamp(1.05rem, 1.5vw, 1.18rem);
    --vl-heading-3: clamp(1.15rem, 2vw, 1.4rem);
    --vl-heading-2: clamp(1.55rem, 3.2vw, 2.35rem);
    --vl-heading-1: clamp(2.25rem, 6.2vw, 4.75rem);

    --vl-space-1: 0.25rem;
    --vl-space-2: 0.5rem;
    --vl-space-3: 0.75rem;
    --vl-space-4: 1rem;
    --vl-space-5: 1.5rem;
    --vl-space-6: 2rem;
    --vl-space-7: 3rem;
    --vl-space-8: 4.5rem;
    --vl-radius-sm: 8px;
    --vl-radius-md: 12px;
    --vl-radius-lg: 16px;
    --vl-shadow-sm: 0 10px 28px rgba(0, 0, 0, 0.3);
    --vl-shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.42);

    --vl-shell: 1180px;
    --vl-content-wide: 1120px;
    --vl-content-editorial: 940px;
    --vl-content-reading: 760px;
    --vl-gutter: 16px;

    /* Backwards-compatible aliases for existing pages. */
    --bg: var(--vl-bg);
    --surface: var(--vl-surface);
    --card: var(--vl-surface-raised);
    --text: var(--vl-text);
    --text-muted: var(--vl-text-muted);
    --muted: var(--vl-text-muted);
    --border: var(--vl-border);
    --brand: var(--vl-brand);
    --brand-strong: var(--vl-brand-hover);
    --radius: var(--vl-radius-sm);
    --shadow-sm: var(--vl-shadow-sm);
    --shadow-md: var(--vl-shadow-lg);
}

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

body {
    min-width: 320px;
    font-family: var(--vl-font-sans);
    color: var(--vl-text);
    background-color: var(--vl-bg);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

img,
svg {
    max-width: 100%;
}

/* One outer alignment for every page; content can narrow inside it. */
.site-shell {
    width: min(var(--vl-shell), calc(100% - (var(--vl-gutter) * 2)));
    margin-inline: auto;
}

/*
 * Existing pages intentionally use different content measures (for example
 * 760px FAQ copy and 940px guides). Keep those measures, but let the shared
 * navigation break out to the same site-wide alignment as the homepage.
 */
.site-page-shell {
    margin-inline: auto;
}

.site-page-shell > .site-nav {
    width: min(var(--vl-shell), calc(100vw - (var(--vl-gutter) * 2)));
    margin-left: 50%;
    transform: translateX(-50%);
}

.content-wide,
.content-editorial,
.content-reading {
    width: 100%;
    margin-inline: auto;
}

.content-wide { max-width: var(--vl-content-wide); }
.content-editorial { max-width: var(--vl-content-editorial); }
.content-reading { max-width: var(--vl-content-reading); }

.section-space {
    padding-block: clamp(var(--vl-space-7), 7vw, var(--vl-space-8));
}

.flow > * { margin-block: 0; }
.flow > * + * { margin-block-start: var(--flow-space, var(--vl-space-4)); }

/* Type roles keep headings consistent without overriding SEO-friendly semantics. */
.display-title,
.page-title {
    max-width: 18ch;
    margin: 0;
    font-size: var(--vl-heading-1);
    font-weight: 760;
    line-height: 0.99;
    letter-spacing: -0.045em;
    text-wrap: balance;
}

.section-title {
    margin: 0;
    font-size: var(--vl-heading-2);
    font-weight: 720;
    line-height: 1.08;
    letter-spacing: -0.025em;
    text-wrap: balance;
}

.card-title {
    margin: 0;
    font-size: var(--vl-heading-3);
    line-height: 1.2;
    letter-spacing: -0.015em;
}

.lead {
    max-width: 65ch;
    color: var(--vl-text-soft);
    font-size: var(--vl-text-lg);
    line-height: 1.65;
}

.eyebrow {
    color: #c9e9ff;
    font-size: var(--vl-text-xs);
    font-weight: 760;
    letter-spacing: 0.055em;
    text-transform: uppercase;
}

/* Accessible interaction defaults. */
:where(a, button, input, select, textarea, summary):focus-visible {
    outline: 3px solid var(--vl-focus);
    outline-offset: 3px;
}

.skip-link {
    position: fixed;
    z-index: 1000;
    top: var(--vl-space-3);
    left: var(--vl-space-3);
    padding: 0.65rem 0.9rem;
    border-radius: var(--vl-radius-sm);
    color: var(--vl-brand-ink);
    background: var(--vl-brand-hover);
    font-weight: 750;
    transform: translateY(calc(-100% - 2rem));
}

.skip-link:focus { transform: translateY(0); }

/* Shared navigation: quiet text links, with one optional conversion action. */
.site-nav {
    display: flex;
    position: relative;
    z-index: 100;
    align-items: center;
    justify-content: space-between;
    gap: var(--vl-space-5);
    min-height: 68px;
    margin: 0;
    padding-block: var(--vl-space-3);
}

.site-nav .brand {
    display: inline-flex;
    flex: 0 0 auto;
    align-items: center;
    gap: 0.6rem;
    color: var(--vl-text);
    font-size: 1rem;
    font-weight: 760;
    text-decoration: none;
    letter-spacing: -0.015em;
}

.site-nav .brand img {
    display: block;
    width: 30px;
    height: 30px;
    border-radius: 7px;
}

.site-nav .menu {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.1rem;
    margin-left: auto;
}

.site-nav .nav-item {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0.55rem 0.72rem;
    border: 0;
    border-radius: var(--vl-radius-sm);
    color: var(--vl-text-soft);
    background: transparent;
    font: inherit;
    font-size: var(--vl-text-sm);
    font-weight: 650;
    line-height: 1.15;
    text-decoration: none;
    white-space: nowrap;
    cursor: pointer;
    transition: color 160ms ease, background-color 160ms ease;
}

.site-nav .nav-item:hover,
.site-nav .nav-item[aria-current="page"] {
    color: var(--vl-text);
    background: rgba(255, 255, 255, 0.07);
}

.site-nav .nav-item[aria-current="page"] {
    box-shadow: inset 0 -2px var(--vl-brand);
}

.site-nav .nav-cta,
.site-nav .nav-download,
.site-nav [data-nav-cta] {
    margin-left: 0.35rem;
    padding-inline: 1rem;
    color: var(--vl-brand-ink);
    background: var(--vl-brand);
    font-weight: 780;
}

.site-nav .nav-cta:hover,
.site-nav .nav-download:hover,
.site-nav [data-nav-cta]:hover {
    color: var(--vl-brand-ink);
    background: var(--vl-brand-hover);
}

.site-nav summary.nav-item {
    list-style: none;
}

.site-nav summary.nav-item::-webkit-details-marker { display: none; }

.site-nav summary.nav-item::after {
    content: "";
    width: 0.38rem;
    height: 0.38rem;
    margin: -0.2rem 0 0 0.5rem;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: rotate(45deg);
}

.site-nav .nav-group { position: relative; }

.site-nav .nav-group[open] > summary.nav-item {
    color: var(--vl-text);
    background: rgba(255, 255, 255, 0.07);
}

.site-nav .nav-group[open] > summary.nav-item::after {
    margin-top: 0.2rem;
    transform: rotate(225deg);
}

.site-nav .nav-drop {
    display: flex;
    position: absolute;
    top: calc(100% + 0.35rem);
    left: 0;
    flex-direction: column;
    gap: 0.1rem;
    min-width: 250px;
    max-height: min(70vh, 480px);
    padding: var(--vl-space-2);
    overflow-y: auto;
    border: 1px solid var(--vl-border-strong);
    border-radius: var(--vl-radius-md);
    background: rgba(14, 14, 14, 0.98);
    box-shadow: var(--vl-shadow-lg);
}

.site-nav .nav-drop a {
    padding: 0.62rem 0.72rem;
    border-radius: 7px;
    color: var(--vl-text-soft);
    font-size: var(--vl-text-sm);
    line-height: 1.25;
    text-decoration: none;
    white-space: nowrap;
}

.site-nav .nav-drop a:hover,
.site-nav .nav-drop a[aria-current="page"] {
    color: var(--vl-text);
    background: rgba(0, 150, 255, 0.13);
}

.site-nav .menu-toggle {
    display: none;
    position: relative;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    border: 1px solid var(--vl-border-strong);
    border-radius: var(--vl-radius-sm);
    color: var(--vl-text);
    background: var(--vl-surface-raised);
    cursor: pointer;
}

.site-nav .menu-toggle span,
.site-nav .menu-toggle::before,
.site-nav .menu-toggle::after {
    content: "";
    position: absolute;
    width: 19px;
    height: 2px;
    border-radius: 2px;
    background: currentColor;
    transition: transform 180ms ease, opacity 180ms ease;
}

.site-nav .menu-toggle::before { transform: translateY(-6px); }
.site-nav .menu-toggle::after { transform: translateY(6px); }
.site-nav.is-open .menu-toggle span { opacity: 0; }
.site-nav.is-open .menu-toggle::before { transform: rotate(45deg); }
.site-nav.is-open .menu-toggle::after { transform: rotate(-45deg); }

/* Shared conversion controls. */
.button,
.cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0.72rem 1.15rem;
    border: 1px solid transparent;
    border-radius: var(--vl-radius-sm);
    color: var(--vl-brand-ink);
    background: var(--vl-brand);
    font: inherit;
    font-weight: 780;
    line-height: 1.15;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: transform 160ms ease, background-color 160ms ease,
        border-color 160ms ease;
}

.button:hover,
.cta:hover {
    color: var(--vl-brand-ink);
    background: var(--vl-brand-hover);
    transform: translateY(-1px);
}

.button.secondary,
.cta.secondary {
    border-color: rgba(0, 150, 255, 0.45);
    color: var(--vl-text);
    background: rgba(0, 150, 255, 0.12);
}

.button.secondary:hover,
.cta.secondary:hover {
    color: var(--vl-text);
    background: rgba(0, 150, 255, 0.22);
}

.store-badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--vl-space-3);
}

.store-btn {
    display: inline-flex;
    align-items: center;
    min-width: 174px;
    min-height: 58px;
    padding: 0.55rem 0.9rem;
    border: 1px solid var(--vl-border-strong);
    border-radius: var(--vl-radius-sm);
    color: var(--vl-text);
    background: #050505;
    box-shadow: var(--vl-shadow-sm);
    text-decoration: none;
    transition: transform 160ms ease, background-color 160ms ease,
        border-color 160ms ease;
}

.store-btn:hover {
    color: var(--vl-text);
    border-color: rgba(0, 150, 255, 0.72);
    background: var(--vl-surface-raised);
    transform: translateY(-1px);
}

.store-btn svg {
    flex: 0 0 auto;
    width: 28px;
    height: 28px;
    margin-right: 0.75rem;
    fill: currentColor;
}

.store-btn > div {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.store-btn span {
    margin-bottom: 0.16rem;
    font-size: 0.64rem;
    line-height: 1;
}

.store-btn strong {
    font-size: 1rem;
    font-weight: 720;
    line-height: 1;
}

.store-note {
    color: var(--vl-text-muted);
    font-size: var(--vl-text-sm);
}

@media (max-width: 860px) {
    :root { --vl-gutter: 12px; }

    .site-page-shell > .site-nav {
        width: 100%;
        margin-left: 0;
        transform: none;
    }

    html.vl-nav-ready { overflow-x: hidden; }
    html.vl-nav-ready .site-nav .menu-toggle {
        z-index: 110;
        display: inline-flex;
    }

    html.vl-nav-ready .site-nav .menu {
        display: flex;
        position: fixed;
        z-index: 90;
        top: 0;
        right: 0;
        bottom: 0;
        flex-direction: column;
        flex-wrap: nowrap;
        align-items: stretch;
        justify-content: flex-start;
        gap: var(--vl-space-2);
        width: min(86vw, 340px);
        margin: 0;
        padding: 5.25rem var(--vl-space-4) var(--vl-space-5);
        overflow-y: auto;
        border-left: 1px solid var(--vl-border);
        background: rgba(7, 7, 7, 0.99);
        box-shadow: -18px 0 48px rgba(0, 0, 0, 0.55);
        transform: translateX(104%);
        visibility: hidden;
        transition: transform 200ms ease, visibility 200ms step-end;
    }

    html.vl-nav-ready .site-nav .menu > * {
        flex: 0 0 auto;
        min-width: 0;
    }

    html.vl-nav-ready .site-nav.is-open .menu {
        transform: translateX(0);
        visibility: visible;
        transition: transform 200ms ease, visibility 0ms step-start;
    }

    .site-nav .nav-item {
        justify-content: space-between;
        width: 100%;
        min-height: 46px;
        padding-inline: var(--vl-space-3);
        background: rgba(255, 255, 255, 0.04);
    }

    .site-nav .nav-item[aria-current="page"] {
        background: rgba(0, 150, 255, 0.13);
        box-shadow: inset 3px 0 var(--vl-brand);
    }

    .site-nav .nav-cta,
    .site-nav .nav-download,
    .site-nav [data-nav-cta] {
        margin: var(--vl-space-2) 0 0;
        color: var(--vl-brand-ink);
        background: var(--vl-brand);
    }

    .site-nav .nav-group {
        position: static;
        width: 100%;
    }

    .site-nav .nav-drop {
        position: static;
        width: 100%;
        min-width: 0;
        max-height: none;
        margin-top: var(--vl-space-1);
        border-color: var(--vl-border);
        background: rgba(255, 255, 255, 0.025);
        box-shadow: none;
    }

    .site-nav .nav-drop a { white-space: normal; }

    body.vl-menu-open { overflow: hidden; }

    .store-badges { width: 100%; }
    .store-btn { flex: 1 1 174px; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto !important; }

    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    :where(.button, .cta, .store-btn):hover { transform: none; }
}