/* Tokens from C:\Repos\STYLE_GUIDE.md (App.* -> --app-*), light on :root, dark below. */
:root {
    --app-window-bg: #F3F3F3;
    --app-layer-bg: #FFFFFF;
    --app-layer-border: #E5E5E5;
    --app-bar-bg: #F7F7F7;
    --app-text: #1B1B1B;
    --app-subtle-text: #5F6368;
    --app-faint-text: #8C959F;
    --app-error: #C42B1C;
    --accent: #005FB8;
    --accent-hover: #0067C0;
    --accent-text: #FFFFFF;
    --alert-tip: #1A7F37;
    --alert-warning: #9A6700;
    --banner-bg: #FFF4CE;
    --banner-border: #E0C36A;
    --code-bg: #F6F8FA;
    --shadow: 0 4px 14px 0 #22000000;
    --radius: 8px;
    color-scheme: light;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --app-window-bg: #202020;
        --app-layer-bg: #272727;
        --app-layer-border: #1C1C1C;
        --app-bar-bg: #2B2B2B;
        --app-text: #F3F3F3;
        --app-subtle-text: #C5C5C5;
        --app-faint-text: #8B8B8B;
        --app-error: #FF99A4;
        --accent: #60CDFF;
        --accent-hover: #75D4FF;
        --accent-text: #000000;
        --alert-tip: #3FB950;
        --alert-warning: #D29922;
        --banner-bg: #433519;
        --banner-border: #8A6D1F;
        --code-bg: #1E1E1E;
        --shadow: 0 4px 14px 0 #66000000;
        color-scheme: dark;
    }
}

:root[data-theme="dark"] {
    --app-window-bg: #202020;
    --app-layer-bg: #272727;
    --app-layer-border: #1C1C1C;
    --app-bar-bg: #2B2B2B;
    --app-text: #F3F3F3;
    --app-subtle-text: #C5C5C5;
    --app-faint-text: #8B8B8B;
    --app-error: #FF99A4;
    --accent: #60CDFF;
    --accent-hover: #75D4FF;
    --accent-text: #000000;
    --alert-tip: #3FB950;
    --alert-warning: #D29922;
    --banner-bg: #433519;
    --banner-border: #8A6D1F;
    --code-bg: #1E1E1E;
    --shadow: 0 4px 14px 0 #66000000;
    color-scheme: dark;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--app-window-bg);
    color: var(--app-text);
    font-family: "Segoe UI", Inter, Arial, sans-serif;
    font-size: 15px;
    line-height: 1.55;
}

a { color: var(--accent); }

h1, h2, h3 { font-weight: 600; line-height: 1.25; margin: 0 0 10px; }
h1 { font-size: 40px; letter-spacing: -0.5px; }
h2 { font-size: 26px; }
h3 { font-size: 16px; }
p { margin: 0 0 12px; }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 560px; }

/* Header and footer bars */
.site-header {
    height: 56px;
    display: flex;
    align-items: center;
}
.site-header .wrap { display: flex; align-items: center; gap: 24px; width: 100%; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--app-text); text-decoration: none; font-size: 14px; }
.brand img { width: 24px; height: 24px; }
.site-header nav { margin-left: auto; display: flex; gap: 20px; font-size: 14px; }
.site-header nav a { color: var(--app-subtle-text); text-decoration: none; }
.site-header nav a:hover { color: var(--app-text); }

.layer {
    background: var(--app-layer-bg);
    border-top: 1px solid var(--app-layer-border);
    padding: 56px 0 72px;
}

/* Footer of the Vinvu Software site: the same navy in light and dark. */
.site-footer { padding-top: 64px; background: #092D47; color: #DCE9F1; font-size: 16px; line-height: 1.65; }
.footer-grid { display: grid; grid-template-columns: 1.7fr 1fr 1.25fr 1fr; gap: 40px; }
.footer-logo { display: block; width: 135px; height: auto; margin-bottom: 21px; filter: brightness(0) invert(1); }
.site-footer h2 { color: #FFFFFF; font-size: 13.6px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; }
.site-footer p { color: #BCD0DC; max-width: 40ch; }
.site-footer a { display: block; width: fit-content; margin-bottom: 9px; color: #E9F2F7; text-decoration: none; }
.site-footer a:hover { color: #FFFFFF; text-decoration: underline; }
.offices { display: grid; gap: 16px; margin-top: 16px; }
.offices strong { display: block; margin-bottom: 3px; color: #FFFFFF; font-size: 13px; }
.offices address { color: #BCD0DC; font-size: 14.4px; font-style: normal; line-height: 1.5; }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 6px 24px; margin-top: 48px; padding-block: 32px; border-top: 1px solid rgba(255, 255, 255, 0.15); color: #AAC1CF; font-size: 13.6px; }
.footer-bottom nav { display: flex; flex-wrap: wrap; gap: 6px 20px; }
.footer-bottom a { margin-bottom: 0; }
@media (max-width: 800px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) {
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { display: grid; }
}

/* Buttons */
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 36px;
    padding: 6px 18px;
    border-radius: 5px;
    border: 1px solid var(--app-layer-border);
    background: var(--app-layer-bg);
    color: var(--app-text);
    font: inherit;
    font-size: 14px;
    text-decoration: none;
    cursor: pointer;
}
.button:hover { background: var(--app-bar-bg); }
.button.accent { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.button.accent:hover { background: var(--accent-hover); }
.button.large { min-height: 42px; padding: 8px 24px; font-size: 15px; }

/* Landing page */
.hero { padding: 40px 0 48px; text-align: center; }
.hero .lead { font-size: 18px; color: var(--app-subtle-text); max-width: 640px; margin: 0 auto 24px; }
.hero .actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.hero .fine { margin-top: 14px; font-size: 13px; color: var(--app-faint-text); }

.screenshot {
    margin: 0;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--app-layer-border);
    box-shadow: var(--shadow);
    background: var(--app-layer-bg);
}
.screenshot img { display: block; width: 100%; height: auto; }
.screenshot .placeholder {
    aspect-ratio: 16 / 10;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 24px;
    color: var(--app-faint-text);
    font-size: 13px;
    background: repeating-linear-gradient(45deg, var(--app-bar-bg), var(--app-bar-bg) 12px, var(--app-layer-bg) 12px, var(--app-layer-bg) 24px);
}
.screenshot figcaption { padding: 10px 14px; font-size: 13px; color: var(--app-subtle-text); border-top: 1px solid var(--app-layer-border); }

.section-head { text-align: center; max-width: 640px; margin: 0 auto 32px; }
.section-head p { color: var(--app-subtle-text); }

.features { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px 32px; margin-bottom: 64px; }
.feature h3 { margin-bottom: 4px; }
.feature p { color: var(--app-subtle-text); font-size: 14px; margin: 0; }

.gallery { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; margin-bottom: 64px; }

/* Pricing */
.plans { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.plan {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 24px;
    border: 1px solid var(--app-layer-border);
    border-radius: var(--radius);
    background: var(--app-layer-bg);
}
.plan.featured { border: 2px solid var(--accent); padding: 23px; }
.plan .price { font-size: 32px; font-weight: 600; }
.plan .price small { font-size: 14px; font-weight: 400; color: var(--app-subtle-text); }
.plan ul { margin: 4px 0 12px; padding-left: 18px; color: var(--app-subtle-text); font-size: 14px; flex: 1; }
.badge { align-self: flex-start; font-size: 12px; padding: 1px 8px; border-radius: 10px; background: var(--accent); color: var(--accent-text); }

.faq { max-width: 720px; margin: 64px auto 0; }
.faq details { border-bottom: 1px solid var(--app-layer-border); padding: 12px 0; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq details p { margin: 8px 0 0; color: var(--app-subtle-text); }

/* Forms */
.card {
    background: var(--app-layer-bg);
    border: 1px solid var(--app-layer-border);
    border-radius: var(--radius);
    padding: 24px;
}
.field { display: flex; flex-direction: column; gap: 4px; margin-bottom: 16px; }
.field label, .label { font-size: 13px; font-weight: 600; }
.field .hint { font-size: 12.5px; color: var(--app-faint-text); }
.field-row { display: grid; grid-template-columns: 1fr 2fr; gap: 12px; }
@media (max-width: 480px) { .field-row { grid-template-columns: 1fr; gap: 0; } }
input[type=text], input[type=email], input[type=number], select {
    font: inherit;
    font-size: 14px;
    min-height: 34px;
    padding: 5px 10px;
    border: 1px solid var(--app-layer-border);
    border-bottom-color: var(--app-faint-text);
    border-radius: 4px;
    background: var(--app-layer-bg);
    color: var(--app-text);
    width: 100%;
}
input:focus { outline: none; border-bottom: 2px solid var(--accent); }
.error { color: var(--app-error); font-size: 13px; }
.checkbox { display: flex; gap: 10px; align-items: flex-start; font-size: 13.5px; color: var(--app-subtle-text); margin-bottom: 16px; }
.checkbox input { margin-top: 3px; }

.choices { display: grid; gap: 8px; margin-bottom: 20px; }
.choice {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 2px 12px;
    align-items: center;
    padding: 12px 14px;
    border: 1px solid var(--app-layer-border);
    border-radius: 6px;
    cursor: pointer;
}
.choice:has(input:checked) { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }
.choice input { grid-row: span 2; }
.choice .title { font-weight: 600; }
.choice .summary { grid-column: 2; font-size: 13px; color: var(--app-subtle-text); }
.choice .amount { grid-row: 1 / span 2; grid-column: 3; font-weight: 600; text-align: right; }

.total { display: flex; justify-content: space-between; align-items: baseline; padding: 14px 0; margin-bottom: 16px; border-top: 1px solid var(--app-layer-border); }
.total strong { font-size: 22px; }

.notice { padding: 12px 16px; border-left: 4px solid var(--alert-tip); background: var(--app-bar-bg); border-radius: 0 6px 6px 0; margin-bottom: 16px; }
.notice.warning { border-left-color: var(--alert-warning); }
.notice.error-box { border-left-color: var(--app-error); }

.page-title { margin-bottom: 6px; }
.page-lead { color: var(--app-subtle-text); margin-bottom: 24px; }

/* Help */
.help-layout { display: grid; grid-template-columns: 260px 1fr; gap: 48px; align-items: start; }
.help-toc { position: sticky; top: 16px; font-size: 13.5px; }
.help-toc .label { color: var(--app-faint-text); margin-top: 16px; }
.help-toc .label:first-child { margin-top: 0; }
.help-toc ul { list-style: none; margin: 4px 0 0; padding: 0; }
.help-toc li { padding: 3px 0; }
.help-toc a { color: var(--app-subtle-text); text-decoration: none; }
.help-toc a:hover { color: var(--accent); }
.help-body { min-width: 0; max-width: 720px; }
.help-body > h2 { margin: 48px 0 8px; padding-bottom: 8px; border-bottom: 1px solid var(--app-layer-border); }
.help-body > h2:first-child { margin-top: 0; }
.help-topic { padding: 16px 0 8px; scroll-margin-top: 16px; }
.help-topic h3 { font-size: 18px; }
.help-topic:target h3 { color: var(--accent); }
.help-topic ul, .help-topic ol { margin: 0 0 12px; padding-left: 22px; }
.help-topic li { margin-bottom: 4px; }
.help-topic dl { margin: 0 0 12px; }
.help-topic dt { font-weight: 600; font-family: Consolas, "Cascadia Mono", monospace; font-size: 13.5px; }
.help-topic dd { margin: 0 0 10px 0; color: var(--app-subtle-text); }
.help-topic .tip { padding: 10px 14px; border-left: 4px solid var(--alert-tip); background: var(--app-bar-bg); border-radius: 0 6px 6px 0; font-size: 14px; }
code { font-family: Consolas, "Cascadia Mono", monospace; font-size: 0.9em; padding: 1px 5px; border-radius: 4px; background: var(--code-bg); overflow-wrap: anywhere; }
@media (max-width: 800px) {
    .help-layout { grid-template-columns: 1fr; gap: 24px; }
    .help-toc { position: static; padding: 16px; border: 1px solid var(--app-layer-border); border-radius: var(--radius); }
}

[hidden] { display: none !important; }

@media (max-width: 640px) {
    h1 { font-size: 30px; }
    .site-header nav a.optional { display: none; }
    .layer { padding: 32px 0 48px; }
}