/* news.vseponemnogu.ru — internal design system
 *
 * The site uses a small semantic-token system that scopes colors,
 * typography, spacing, and layout widths to CSS custom properties.
 * No utility framework, no inline JS, no web fonts (system stack only).
 *
 * The CSS is intentionally readable as a single linear document so
 * future visual changes do not require a bundler or fingerprinting.
 */

:root {
  /* Colour tokens — neutral newsprint palette.  Foreground/background
   * values are tuned for WCAG-AA contrast on a white canvas. */
  --color-bg: #ffffff;
  --color-bg-subtle: #f7f8fa;
  --color-bg-muted: #eef1f5;
  --color-bg-card: #ffffff;
  --color-border: #d8dde4;
  --color-border-strong: #b9c1cc;
  --color-fg: #1a2230;
  --color-fg-muted: #4b5563;
  --color-fg-subtle: #6b7585;
  --color-fg-on-accent: #ffffff;
  --color-accent: #1f3b66;
  --color-accent-hover: #2c4f87;
  --color-link: #134b8a;
  --color-link-hover: #1a3666;
  --color-link-visited: #5b3a83;
  --color-focus-ring: #2563eb;
  --color-mark-bg: #fff4b8;

  /* Typography tokens */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PT Sans",
    "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Charter", "Iowan Old Style", "Source Serif Pro",
    "Georgia", "Times New Roman", serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Menlo", "Consolas",
    "Liberation Mono", monospace;

  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-md: 1.0625rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 1.875rem;
  --font-size-3xl: 2.25rem;
  --font-size-4xl: 2.75rem;

  --line-height-tight: 1.18;
  --line-height-snug: 1.32;
  --line-height-normal: 1.55;
  --line-height-relaxed: 1.7;

  /* Spacing tokens — 4-px scale. */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 2.5rem;
  --space-8: 3rem;
  --space-10: 4rem;
  --space-12: 5rem;

  /* Layout widths */
  --content-max-width: 72ch;
  --shell-max-width: 1180px;
  --card-max-width: 920px;

  /* Radii and shadows */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;
  --shadow-card: 0 1px 0 rgba(15, 23, 42, 0.04),
                 0 2px 4px rgba(15, 23, 42, 0.04);
  --shadow-card-hover: 0 1px 0 rgba(15, 23, 42, 0.06),
                       0 6px 16px rgba(15, 23, 42, 0.08);

  color-scheme: light;
}

/* -------------------------------------------------------------------------
 * Base
 * ------------------------------------------------------------------------- */

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

html {
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--color-bg-subtle);
  color: var(--color-fg);
  font-family: var(--font-sans);
  font-size: var(--font-size-md);
  line-height: var(--line-height-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-link);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--color-link-hover);
}

a:visited {
  color: var(--color-link-visited);
}

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

::selection {
  background: var(--color-mark-bg);
  color: var(--color-fg);
}

/* Skip link — appears only on keyboard focus. */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-3);
  background: var(--color-accent);
  color: var(--color-fg-on-accent);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  text-decoration: none;
  z-index: 100;
  transition: top 0.15s ease-in-out;
}

.skip-link:focus {
  top: var(--space-3);
  color: var(--color-fg-on-accent);
}

/* -------------------------------------------------------------------------
 * Site shell
 * ------------------------------------------------------------------------- */

.site-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-header {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  max-width: var(--shell-max-width);
  margin-inline: auto;
  padding: var(--space-4) var(--space-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  flex-wrap: wrap;
}

.site-brand {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-fg);
}

.site-brand__name {
  font-size: var(--font-size-lg);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.site-brand__tagline {
  font-size: var(--font-size-sm);
  color: var(--color-fg-muted);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
}

.site-nav__link {
  display: inline-block;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--color-fg-muted);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.site-nav__link:hover {
  background: var(--color-bg-muted);
  color: var(--color-fg);
}

.site-nav__link[aria-current="page"] {
  background: var(--color-bg-muted);
  color: var(--color-accent);
}

.site-main {
  flex: 1;
  max-width: var(--shell-max-width);
  margin-inline: auto;
  padding: var(--space-6) var(--space-5);
  width: 100%;
}

.site-footer {
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  margin-top: auto;
}

.site-footer__inner {
  max-width: var(--shell-max-width);
  margin-inline: auto;
  padding: var(--space-5);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.site-footer__brand {
  color: var(--color-fg-muted);
  font-size: var(--font-size-sm);
}

.site-footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.site-footer__link {
  color: var(--color-fg-muted);
  font-size: var(--font-size-sm);
  text-decoration: none;
}

.site-footer__link:hover {
  color: var(--color-fg);
  text-decoration: underline;
}

/* -------------------------------------------------------------------------
 * Breadcrumbs
 * ------------------------------------------------------------------------- */

.breadcrumbs {
  font-size: var(--font-size-sm);
  color: var(--color-fg-muted);
  margin-bottom: var(--space-5);
}

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs__item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.breadcrumbs__sep {
  color: var(--color-fg-subtle);
}

.breadcrumbs__link {
  color: var(--color-fg-muted);
  text-decoration: none;
}

.breadcrumbs__link:hover {
  color: var(--color-fg);
  text-decoration: underline;
}

.breadcrumbs__current {
  color: var(--color-fg);
  font-weight: 500;
}

/* -------------------------------------------------------------------------
 * Section headings
 * ------------------------------------------------------------------------- */

.section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.section-heading__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  line-height: var(--line-height-snug);
  margin: 0;
  letter-spacing: -0.01em;
}

.section-heading__meta {
  color: var(--color-fg-muted);
  font-size: var(--font-size-sm);
}

/* -------------------------------------------------------------------------
 * Homepage
 * ------------------------------------------------------------------------- */

.page-home__lead {
  margin-bottom: var(--space-7);
}

.page-home__lead-title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  line-height: var(--line-height-tight);
  margin: 0 0 var(--space-3);
  letter-spacing: -0.02em;
}

.page-home__lead-description {
  font-size: var(--font-size-lg);
  color: var(--color-fg-muted);
  margin: 0;
  max-width: 60ch;
}

.article-list {
  display: grid;
  gap: var(--space-4);
}

.article-list--feature {
  grid-template-columns: 1fr;
}

.article-list__empty {
  padding: var(--space-7) var(--space-5);
  text-align: center;
  color: var(--color-fg-muted);
  background: var(--color-bg);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-lg);
}

@media (min-width: 880px) {
  .article-list--columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* -------------------------------------------------------------------------
 * Article card
 * ------------------------------------------------------------------------- */

.article-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-5);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.article-card:hover {
  box-shadow: var(--shadow-card-hover);
}

.article-card--feature {
  padding: var(--space-6);
  background: linear-gradient(180deg, var(--color-bg-card) 0%, var(--color-bg-subtle) 100%);
}

.article-card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--color-fg-muted);
}

.article-card__meta time {
  font-variant-numeric: tabular-nums;
}

.article-card__format {
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
  font-size: var(--font-size-xs);
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--color-bg-muted);
  color: var(--color-fg-muted);
}

.article-card__title {
  margin: 0;
  font-size: var(--font-size-xl);
  font-weight: 700;
  line-height: var(--line-height-snug);
  letter-spacing: -0.01em;
}

.article-card--feature .article-card__title {
  font-size: var(--font-size-2xl);
}

.article-card__link {
  color: var(--color-fg);
  text-decoration: none;
}

.article-card__link:hover {
  color: var(--color-link);
  text-decoration: underline;
  text-decoration-thickness: 2px;
}

.article-card__description {
  margin: 0;
  color: var(--color-fg-muted);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
}

/* -------------------------------------------------------------------------
 * Article page
 * ------------------------------------------------------------------------- */

.page-article {
  max-width: var(--card-max-width);
  margin-inline: auto;
}

.article {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-6);
  box-shadow: var(--shadow-card);
}

.article__back {
  margin-bottom: var(--space-4);
  font-size: var(--font-size-sm);
}

.article__back a {
  color: var(--color-fg-muted);
  text-decoration: none;
}

.article__back a:hover {
  color: var(--color-fg);
  text-decoration: underline;
}

.article__header {
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--color-border);
}

.article__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--color-fg-muted);
  margin-bottom: var(--space-4);
}

.article__meta time {
  font-variant-numeric: tabular-nums;
}

.article__format {
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
  font-size: var(--font-size-xs);
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--color-bg-muted);
  color: var(--color-fg-muted);
}

.article__title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  line-height: var(--line-height-tight);
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-3);
}

.article__description {
  font-size: var(--font-size-lg);
  color: var(--color-fg-muted);
  line-height: var(--line-height-snug);
  margin: 0;
  max-width: 56ch;
}

.article__body {
  font-family: var(--font-serif);
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
  color: var(--color-fg);
  max-width: var(--content-max-width);
}

.article__body p {
  margin: 0 0 var(--space-5);
}

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

.article__body a {
  word-break: break-word;
  overflow-wrap: anywhere;
}

.article__body h2 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  line-height: var(--line-height-snug);
  margin: var(--space-7) 0 var(--space-3);
  letter-spacing: -0.01em;
}

.article__body h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin: var(--space-6) 0 var(--space-2);
}

.article__body blockquote {
  margin: var(--space-5) 0;
  padding: var(--space-3) var(--space-5);
  border-left: 3px solid var(--color-border-strong);
  color: var(--color-fg-muted);
  font-style: italic;
}

.article__body ul,
.article__body ol {
  margin: 0 0 var(--space-5);
  padding-left: var(--space-6);
}

.article__body li {
  margin-bottom: var(--space-2);
}

.article__body code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--color-bg-muted);
  padding: 0.1em 0.35em;
  border-radius: var(--radius-sm);
  word-break: break-word;
}

.article__body pre {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-snug);
  background: var(--color-bg-muted);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  overflow-x: auto;
  white-space: pre;
  margin: 0 0 var(--space-5);
}

.article__body pre code {
  background: transparent;
  padding: 0;
  white-space: inherit;
}

/* -------------------------------------------------------------------------
 * Sources
 * ------------------------------------------------------------------------- */

.sources {
  margin-top: var(--space-7);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}

.sources__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin: 0 0 var(--space-4);
  letter-spacing: -0.01em;
}

.sources__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.sources__item {
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  word-break: break-word;
  overflow-wrap: anywhere;
}

.sources__name {
  display: block;
  font-weight: 600;
  color: var(--color-fg);
  margin-bottom: var(--space-1);
}

.sources__url {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-fg-muted);
  word-break: break-all;
  overflow-wrap: anywhere;
}

/* -------------------------------------------------------------------------
 * Empty state
 * ------------------------------------------------------------------------- */

.empty-state {
  padding: var(--space-7) var(--space-5);
  text-align: center;
  color: var(--color-fg-muted);
  background: var(--color-bg);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-lg);
}

.empty-state__title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-fg);
  margin: 0 0 var(--space-2);
}

.empty-state__body {
  margin: 0;
}

/* -------------------------------------------------------------------------
 * Mobile / responsive
 * ------------------------------------------------------------------------- */

@media (max-width: 720px) {
  .site-main {
    padding: var(--space-5) var(--space-4);
  }

  .site-header__inner {
    padding: var(--space-3) var(--space-4);
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .site-nav {
    width: 100%;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: var(--space-1);
  }

  .site-nav__link {
    white-space: nowrap;
  }

  .article {
    padding: var(--space-5) var(--space-4);
    border-radius: var(--radius-md);
    box-shadow: none;
  }

  .article-card {
    padding: var(--space-4);
  }

  .article-card--feature {
    padding: var(--space-5) var(--space-4);
  }

  .article__title {
    font-size: var(--font-size-2xl);
  }

  .article__body {
    font-size: var(--font-size-md);
  }

  .page-home__lead-title {
    font-size: var(--font-size-2xl);
  }

  .page-home__lead-description {
    font-size: var(--font-size-md);
  }

  .site-footer__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-5) var(--space-4);
  }
}

@media (max-width: 480px) {
  body {
    font-size: var(--font-size-base);
  }

  .article__body {
    font-size: 1rem;
  }

  .article__title {
    font-size: var(--font-size-xl);
  }

  .section-heading {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
  }
}