html {
    font-size: 100%;
    scroll-behavior: smooth;
}

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

body {
    margin: 0;
    background:
        radial-gradient(circle at top left, rgba(37, 99, 235, 0.18), transparent 24rem),
        radial-gradient(circle at 85% 0, rgba(56, 189, 248, 0.12), transparent 18rem),
        linear-gradient(180deg, #111c32 0%, var(--mv-bg) 20rem, #0b1220 100%);
    color: var(--mv-text);
    font-family: var(--mv-font-ui);
    font-size: var(--mv-text-base);
    line-height: var(--mv-line-height);
    text-rendering: optimizeLegibility;
}

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

a {
    color: var(--mv-accent-strong);
    text-decoration: none;
}

a:hover,
a:focus-visible {
    color: #93c5fd;
}

button,
input,
select,
textarea {
    font: inherit;
}

button {
    color: inherit;
}

code,
pre,
.is-mono {
    font-family: var(--mv-font-mono);
}

h1,
h2,
h3,
h4 {
    margin: 0 0 var(--mv-space-4);
    color: var(--mv-heading);
    line-height: 1.15;
    letter-spacing: -0.03em;
}

h1 {
    font-size: clamp(2.4rem, 4vw, 2.625rem);
}

h2 {
    font-size: clamp(1.65rem, 3vw, 1.875rem);
}

h3 {
    font-size: clamp(1.25rem, 2vw, 1.5rem);
}

p,
ul,
ol,
dl,
table,
blockquote,
figure {
    margin: 0 0 var(--mv-space-5);
}

ul,
ol {
    padding-left: 1.4rem;
}

hr {
    margin: var(--mv-space-6) 0;
    border: 0;
    border-top: 1px solid rgba(148, 163, 184, 0.2);
}

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    text-align: left;
}

:focus-visible {
    outline: 2px solid var(--mv-accent-strong);
    outline-offset: 2px;
}

.motovintage-site {
    min-height: 100vh;
}

.site-shell {
    width: min(var(--mv-shell-max), calc(100% - (2 * var(--mv-shell-gutter))));
    margin: 0 auto;
}

.site-topbar {
    position: sticky;
    top: 0;
    z-index: 40;
    border-bottom: 1px solid rgba(148, 163, 184, 0.14);
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(18px);
}

.site-topbar__inner {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) minmax(16rem, 28rem) auto;
    align-items: center;
    gap: var(--mv-space-4);
    min-height: var(--mv-topbar-height);
}

.site-nav-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 2.75rem;
    height: 2.75rem;
    padding: 0;
    border: 1px solid rgba(148, 163, 184, 0.22);
    border-radius: var(--mv-radius-sm);
    background: rgba(30, 41, 59, 0.82);
    cursor: pointer;
}

.site-nav-toggle__line {
    position: relative;
    width: 1rem;
    height: 2px;
    border-radius: 999px;
    background: var(--mv-text);
}

.site-nav-toggle__line::before,
.site-nav-toggle__line::after {
    content: "";
    position: absolute;
    left: 0;
    width: 1rem;
    height: 2px;
    border-radius: 999px;
    background: var(--mv-text);
}

.site-nav-toggle__line::before {
    top: -0.35rem;
}

.site-nav-toggle__line::after {
    top: 0.35rem;
}

.site-brand {
    display: inline-flex;
    flex-direction: column;
    gap: 0.1rem;
    min-width: 0;
}

.site-brand__title {
    color: var(--mv-heading);
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.site-brand__subtitle,
.site-topbar__meta {
    color: var(--mv-text-muted);
    font-size: 0.84rem;
}

.mv-global-search {
    position: relative;
}

.mv-global-search__input {
    width: 100%;
    min-height: 3rem;
    padding: 0.8rem 3rem 0.8rem 2.9rem;
    border: 1px solid rgba(148, 163, 184, 0.16);
    border-radius: 999px;
    background: rgba(30, 41, 59, 0.92);
    color: var(--mv-text);
    transition: border-color 160ms ease, background-color 160ms ease;
}

.mv-global-search__input::placeholder {
    color: var(--mv-text-muted);
}

.mv-global-search__input:focus {
    border-color: rgba(96, 165, 250, 0.65);
    background: rgba(36, 50, 71, 0.96);
    outline: 0;
}

.mv-global-search__icon,
.mv-global-search__hint {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
}

.mv-global-search__icon {
    left: 1rem;
    width: 1rem;
    height: 1rem;
    color: var(--mv-text-muted);
}

.mv-global-search__hint {
    right: 0.95rem;
    color: var(--mv-text-faint);
    font-size: 0.75rem;
}

.mv-app-shell {
    display: grid;
    grid-template-columns: minmax(0, var(--mv-sidebar-width)) minmax(0, 1fr);
    gap: clamp(1.25rem, 2vw, 2rem);
    align-items: start;
    padding: var(--mv-space-5) 0 var(--mv-space-8);
}

.mv-sidebar {
    position: sticky;
    top: calc(var(--mv-topbar-height) + var(--mv-space-5));
    align-self: start;
    max-height: calc(100vh - var(--mv-topbar-height) - (2 * var(--mv-space-5)));
    padding: var(--mv-space-5);
    overflow: auto;
    border: 1px solid rgba(148, 163, 184, 0.16);
    border-radius: var(--mv-radius-xl);
    background:
        linear-gradient(180deg, rgba(51, 65, 85, 0.2), rgba(15, 23, 42, 0)),
        rgba(15, 23, 42, 0.82);
    box-shadow: var(--mv-shadow-panel);
}

.mv-sidebar-backdrop {
    display: none;
}

.site-main {
    min-width: 0;
}

.mv-content-frame {
    display: grid;
    gap: var(--mv-space-6);
}

.mv-panel,
.content-surface {
    border: 1px solid rgba(148, 163, 184, 0.14);
    border-radius: var(--mv-radius-xl);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0)),
        rgba(30, 41, 59, 0.88);
    box-shadow: var(--mv-shadow-soft);
}

.content-surface {
    padding: clamp(1.25rem, 2.5vw, 2rem);
}

.section-stack > * + * {
    margin-top: var(--mv-space-5);
}

.muted {
    color: var(--mv-text-muted);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.mv-page-header {
    display: grid;
    gap: var(--mv-space-5);
    padding: clamp(1.4rem, 2.5vw, 2rem);
}

.mv-page-header__meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--mv-space-3);
    align-items: center;
    color: var(--mv-text-muted);
    font-size: 0.95rem;
}

.mv-page-header__intro {
    max-width: 60rem;
    color: var(--mv-text-muted);
}

.mv-page-header__split {
    display: grid;
    grid-template-columns: minmax(0, 1.6fr) minmax(16rem, 0.9fr);
    gap: var(--mv-space-5);
}

.mv-page-footer {
    padding: var(--mv-space-6) 0 var(--mv-space-7);
    border-top: 1px solid rgba(148, 163, 184, 0.12);
    color: var(--mv-text-muted);
}

.mv-page-footer p {
    margin: 0;
}

@media (max-width: 1100px) {
    .site-topbar__inner {
        grid-template-columns: auto minmax(0, 1fr) minmax(12rem, 20rem);
    }

    .site-topbar__meta {
        display: none;
    }
}

@media (max-width: 920px) {
    .site-nav-toggle {
        display: inline-flex;
    }

    .site-topbar__inner {
        grid-template-columns: auto minmax(0, 1fr) minmax(0, 1fr);
    }

    .mv-app-shell {
        grid-template-columns: minmax(0, 1fr);
    }

    .mv-sidebar {
        position: fixed;
        top: calc(var(--mv-topbar-height) + 0.75rem);
        left: var(--mv-shell-gutter);
        bottom: var(--mv-shell-gutter);
        z-index: 45;
        width: min(22rem, calc(100vw - (2 * var(--mv-shell-gutter))));
        max-height: none;
        transform: translateX(calc(-100% - 2rem));
        transition: transform 180ms ease;
    }

    .has-sidebar-open .mv-sidebar {
        transform: translateX(0);
    }

    .mv-sidebar-backdrop {
        position: fixed;
        inset: 0;
        z-index: 44;
        background: var(--mv-overlay);
    }

    .has-sidebar-open .mv-sidebar-backdrop {
        display: block;
    }
}

@media (max-width: 720px) {
    body {
        font-size: 1rem;
    }

    .site-topbar__inner {
        grid-template-columns: auto minmax(0, 1fr);
    }

    .mv-global-search {
        grid-column: 1 / -1;
    }

    .mv-page-header__split {
        grid-template-columns: minmax(0, 1fr);
    }
}