:root {
  --ink: #10151a;
  --ink-soft: #4b5563;
  --ink-faint: #7c8590;
  --paper: #fafaf9;
  --paper-raised: #ffffff;
  --border: #e6e6e2;
  --accent: #0f6b57;
  --accent-strong: #0a4c3d;
  --accent-soft: #e4f2ee;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow-md: 0 8px 24px rgba(16, 21, 26, 0.07);
  --shadow-lg: 0 16px 48px rgba(16, 21, 26, 0.12);
  --font-body: "Open Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-display: "Poppins", var(--font-body);
  --gradient-accent: linear-gradient(135deg, #0080ff, #8b00ff);
  --glass-bg: rgba(255, 255, 255, 0.8);
  --glass-border: rgba(15, 107, 87, 0.14);
  --glass-shadow: 0 4px 24px rgba(15, 107, 87, 0.1);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, .brand {
  font-family: var(--font-display);
}

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

.site-header-bar {
  position: sticky;
  top: 16px;
  z-index: 40;
  padding: 0 16px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px 24px;
  gap: 20px;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  box-shadow: var(--glass-shadow);
}

.brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.brand span {
  color: var(--accent);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.9rem;
}

.site-nav a:hover {
  color: var(--ink);
}

.lang-switcher {
  position: relative;
}

.lang-switcher summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink-soft);
  background: var(--paper-raised);
  transition: border-color 0.15s ease;
}

.lang-switcher summary::-webkit-details-marker,
.lang-switcher summary::marker {
  display: none;
  content: "";
}

.lang-switcher[open] summary,
.lang-switcher summary:hover {
  border-color: var(--accent);
  color: var(--ink);
}

.lang-flag {
  display: inline-flex;
  line-height: 1;
}

.lang-flag svg {
  width: 20px;
  height: 14px;
  border-radius: 2px;
  display: block;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.08);
}

.lang-menu button .lang-flag svg {
  width: 18px;
  height: 13px;
}

.lang-menu {
  position: absolute;
  top: calc(100% + 8px);
  inset-inline-end: 0;
  background: var(--paper-raised);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  padding: 6px;
  display: flex;
  flex-direction: column;
  min-width: 170px;
  max-height: 320px;
  overflow-y: auto;
  z-index: 30;
}

.lang-menu button {
  display: flex;
  align-items: center;
  gap: 10px;
  background: none;
  border: none;
  padding: 9px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.88rem;
  color: var(--ink);
  text-align: left;
  width: 100%;
}

.lang-menu button:hover {
  background: var(--paper);
}

.lang-menu button[aria-current="true"] {
  font-weight: 700;
  color: var(--accent-strong);
}

.check-cta {
  border: none;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 0.85rem;
  padding: 9px 16px;
  border-radius: 999px;
  text-decoration: none;
  white-space: nowrap;
}

.check-cta:hover {
  background: var(--accent-strong);
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 24px 96px;
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--ink-faint);
  margin: 0 0 20px;
}

.breadcrumb a {
  color: var(--ink-faint);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--accent);
}

.category-tag {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 999px;
  margin: 0 0 14px;
}

h1 {
  font-size: clamp(1.7rem, 4vw, 2.3rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
}

.dek {
  font-size: 1.1rem;
  color: var(--ink-soft);
  margin: 0 0 36px;
}

article section {
  margin: 0 0 36px;
}

article h2 {
  font-size: 1.3rem;
  margin: 0 0 12px;
}

article p {
  font-size: 1rem;
  color: var(--ink-soft);
  line-height: 1.7;
  margin: 0 0 14px;
}

article ol, article ul {
  padding-left: 22px;
  color: var(--ink-soft);
  line-height: 1.7;
}

article li {
  margin: 0 0 10px;
}

article code {
  background: var(--accent-soft);
  color: var(--accent-strong);
  padding: 2px 6px;
  border-radius: 5px;
  font-size: 0.9em;
}

.fix-box {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  box-shadow: var(--glass-shadow);
  padding: 24px 26px;
}

.fix-box h2 {
  margin-top: 0;
}

.cta-card {
  margin-top: 48px;
  padding: 28px 26px;
  background: var(--accent-soft);
  border-radius: var(--radius-lg);
  text-align: center;
}

.cta-card h2 {
  margin: 0 0 8px;
  font-size: 1.2rem;
}

.cta-card p {
  margin: 0 0 18px;
  color: var(--ink-soft);
}

.cta-card a {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  padding: 12px 22px;
  border-radius: 999px;
  text-decoration: none;
}

.cta-card a:hover {
  background: var(--accent-strong);
}

.related {
  margin-top: 40px;
}

.related h2 {
  font-size: 1.05rem;
}

.related ul {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 8px;
}

.related a {
  text-decoration: none;
  font-weight: 600;
}

.related a:hover {
  text-decoration: underline;
}

.site-footer {
  text-align: center;
  color: var(--ink-faint);
  font-size: 0.85rem;
  padding: 32px 20px 48px;
  border-top: 1px solid var(--border);
  margin-top: 24px;
}

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 12px;
}

.footer-links a {
  color: var(--ink-faint);
  font-size: 0.82rem;
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--accent);
  text-decoration: underline;
}