/*
 * base.css — сброс, типографика, ссылки, фокус, скроллбары, служебные утилиты.
 */

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

html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    background-color: var(--bg);
    background-image:
        radial-gradient(var(--grain) 1px, transparent 1px),
        radial-gradient(var(--grain) 1px, transparent 1px);
    background-position: 0 0, 2px 2px;
    background-size: 4px 4px, 4px 4px;
    color: var(--text);
    font-family: var(--font-sans);
    font-size: var(--fs-base);
    line-height: var(--lh-normal);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
h4,
h5 {
    margin: 0 0 var(--sp-3);
    font-family: var(--font-serif);
    font-weight: 600;
    line-height: var(--lh-tight);
    letter-spacing: 0.005em;
    color: var(--text);
    overflow-wrap: anywhere;
}

h1 {
    font-size: var(--fs-2xl);
}

h2 {
    font-size: var(--fs-xl);
}

h3 {
    font-size: var(--fs-lg);
}

h4 {
    font-size: var(--fs-md);
}

p {
    margin: 0 0 var(--sp-3);
}

p:last-child {
    margin-bottom: 0;
}

ul,
ol {
    margin: 0 0 var(--sp-3);
    padding-left: 1.25em;
}

li {
    margin-bottom: var(--sp-1);
}

a {
    color: var(--accent);
    text-decoration: none;
    text-underline-offset: 3px;
}

a:hover {
    text-decoration: underline;
}

button {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

input,
textarea,
select {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

code,
kbd,
pre,
.mono {
    font-family: var(--font-mono);
    font-variant-numeric: tabular-nums;
}

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

hr,
.divider {
    border: 0;
    border-top: var(--hairline);
    margin: var(--sp-5) 0;
}

::selection {
    background: var(--accent-soft);
    color: var(--text);
}

:focus-visible {
    outline: 2px solid var(--focus);
    outline-offset: 2px;
    border-radius: var(--radius-xs);
}

.view:focus {
    outline: none;
}

/* Скроллбары */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--border-strong) transparent;
}

*::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

*::-webkit-scrollbar-thumb {
    background-color: var(--border-strong);
    border: 3px solid transparent;
    background-clip: content-box;
    border-radius: var(--radius-sm);
}

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

/* Служебные утилиты */
.kicker {
    display: block;
    font-family: var(--font-sans);
    font-size: var(--fs-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--track-kicker);
    color: var(--muted);
}

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

.pre-wrap {
    white-space: pre-wrap;
    overflow-wrap: anywhere;
}

.nowrap {
    white-space: nowrap;
}

.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

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

.skip-link {
    position: absolute;
    left: var(--sp-4);
    top: -3rem;
    z-index: 100;
    display: flex;
    align-items: center;
    min-height: var(--tap);
    padding: var(--sp-2) var(--sp-4);
    background: var(--surface);
    border: var(--hairline-strong);
    border-radius: var(--radius-sm);
    transition: top var(--dur-base) var(--ease);
}

.skip-link:focus {
    top: var(--sp-2);
}

.noscript {
    margin: var(--sp-6) auto;
    max-width: var(--narrow-max);
    padding: var(--sp-4);
    border: var(--hairline-strong);
    border-radius: var(--radius-md);
    background: var(--surface);
    text-align: center;
}

.stack {
    display: flex;
    flex-direction: column;
    gap: var(--sp-4);
}

.stack--tight {
    gap: var(--sp-2);
}

.cluster {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--sp-2);
}

.cluster--between {
    justify-content: space-between;
}

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

    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }
}