:root {
  --color-primary: #0057ff;
  --color-primary-hover: #0046cc;
  --color-primary-soft: #e6f0ff;
  --color-accent: #00b67a;
  --color-accent-soft: #e6f9f1;
  --color-text: #1a1a2e;
  --color-text-muted: #5a5a6e;
  --color-bg: #ffffff;
  --color-bg-soft: #f4f6fb;
  --color-border: #e2e6ee;
  --color-border-strong: #cdd3e0;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.5rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  --font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-md: 1.125rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;
  --line-height-base: 1.6;
  --line-height-heading: 1.2;
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --container-max: 1200px;
  --container-narrow: 720px;
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 3px solid var(--color-primary); outline-offset: 2px; }

.skip-link {
  position: absolute; top: -100%; left: var(--space-md); z-index: 100;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-primary); color: #fff;
  border-radius: var(--radius-sm); font-weight: 600;
}
.skip-link:focus { top: var(--space-md); }

.container { width: 100%; max-width: var(--container-max); margin-inline: auto; padding-inline: var(--space-lg); }
.container--narrow { max-width: var(--container-narrow); }

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.92); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 4rem; }

.logo { display: flex; align-items: center; gap: var(--space-sm); font-weight: 700; font-size: var(--font-size-lg); color: var(--color-text); }
.logo:hover { text-decoration: none; }
.logo-text--dim { color: var(--color-text-muted); font-weight: 500; }

.lang-switch { display: flex; align-items: center; gap: var(--space-xs); font-size: var(--font-size-sm); font-weight: 500; }
.lang-switch__btn {
  padding: var(--space-xs) var(--space-sm); border: none; background: transparent;
  color: var(--color-text-muted); font: inherit; cursor: pointer;
  border-radius: var(--radius-sm); transition: color var(--transition-fast), background-color var(--transition-fast);
  text-decoration: none;
}
.lang-switch__btn:hover { color: var(--color-text); background-color: var(--color-bg-soft); text-decoration: none; }
.lang-switch__btn.is-active { color: #fff; background-color: var(--color-primary); }
.lang-switch__divider { color: var(--color-border-strong); }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--space-sm); padding: 0.75rem 1.25rem;
  border: 1px solid transparent; border-radius: var(--radius-md);
  font: inherit; font-weight: 600; font-size: var(--font-size-base); line-height: 1.25;
  text-decoration: none; cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn--primary { background-color: var(--color-primary); color: #fff; }
.btn--primary:hover { background-color: var(--color-primary-hover); }
.btn--secondary { background-color: #fff; color: var(--color-text); border-color: var(--color-border-strong); }
.btn--secondary:hover { background-color: var(--color-bg-soft); }
.btn--large { padding: 1rem 2rem; font-size: var(--font-size-md); }

.hero {
  padding-block: var(--space-3xl) var(--space-2xl);
  background: linear-gradient(180deg, var(--color-primary-soft) 0%, var(--color-bg) 100%);
  overflow: hidden;
}
.hero__inner { display: grid; grid-template-columns: 1fr; gap: var(--space-2xl); align-items: center; }
.eyebrow { margin: 0 0 var(--space-sm); font-size: var(--font-size-sm); font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-primary); }
.hero h1 { margin: 0 0 var(--space-lg); font-size: var(--font-size-3xl); line-height: var(--line-height-heading); font-weight: 700; letter-spacing: -0.02em; }
.hero__lead { margin: 0 0 var(--space-xl); font-size: var(--font-size-md); color: var(--color-text-muted); max-width: 54ch; }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-md); margin-bottom: var(--space-xl); }
.hero__trust { display: grid; grid-template-columns: 1fr; gap: var(--space-sm); margin: 0; padding: 0; list-style: none; font-size: var(--font-size-sm); color: var(--color-text-muted); }

.hero__visual { display: flex; justify-content: center; }
.phone-card { width: 220px; height: 420px; padding: 0.75rem; background: var(--color-text); border-radius: var(--radius-xl); box-shadow: 0 24px 60px rgba(0,0,0,0.18); }
.phone-card__screen { position: relative; height: 100%; background: var(--color-bg-soft); border-radius: var(--radius-lg); overflow: hidden; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: var(--space-md); }
.phone-card__bar { position: absolute; top: 0; left: 50%; transform: translateX(-50%); width: 40%; height: 1.25rem; background: var(--color-text); border-bottom-left-radius: var(--radius-md); border-bottom-right-radius: var(--radius-md); }
.phone-card__signal { position: absolute; top: var(--space-md); right: var(--space-md); display: flex; align-items: flex-end; gap: 3px; }
.phone-card__signal span { width: 5px; background: var(--color-accent); border-radius: 1px; }
.phone-card__signal span:nth-child(1) { height: 6px; }
.phone-card__signal span:nth-child(2) { height: 10px; }
.phone-card__signal span:nth-child(3) { height: 14px; }
.phone-card__signal span:nth-child(4) { height: 18px; }
.phone-card__label { position: absolute; top: var(--space-md); left: var(--space-md); font-size: 0.75rem; font-weight: 700; color: var(--color-text-muted); }
.phone-card__flag { font-size: 4rem; line-height: 1; }
.phone-card__status { font-size: var(--font-size-lg); font-weight: 700; color: var(--color-accent); }

.article-section { padding-block: var(--space-2xl); }
.article-section__header { margin-bottom: var(--space-xl); }
.article-section h2, .faq-section h2, .cta-card h2 { margin: 0 0 var(--space-md); font-size: var(--font-size-2xl); line-height: var(--line-height-heading); font-weight: 700; letter-spacing: -0.01em; }
.article-section__intro { margin: 0; font-size: var(--font-size-md); color: var(--color-text-muted); }
.content-chunk { margin-bottom: var(--space-xl); }
.content-chunk h3 { margin: 0 0 var(--space-md); font-size: var(--font-size-xl); line-height: var(--line-height-heading); font-weight: 600; }
.content-chunk p, .content-chunk ul, .content-chunk ol { margin: 0 0 var(--space-md); color: var(--color-text-muted); }
.content-chunk p:last-child, .content-chunk ul:last-child, .content-chunk ol:last-child { margin-bottom: 0; }
.content-chunk ul, .content-chunk ol { padding-left: 1.25rem; }
.content-chunk li { margin-bottom: var(--space-sm); }
.content-chunk li strong { color: var(--color-text); }
.content-chunk a { color: var(--color-primary); }
.steps { counter-reset: step; list-style: none; padding-left: 0; }
.steps li { position: relative; padding-left: 2.5rem; }
.steps li::before { counter-increment: step; content: counter(step); position: absolute; left: 0; top: 0; width: 1.75rem; height: 1.75rem; display: flex; align-items: center; justify-content: center; background: var(--color-primary); color: #fff; font-size: var(--font-size-sm); font-weight: 700; border-radius: 50%; }
.info-box { padding: var(--space-md) var(--space-lg); background: var(--color-accent-soft); border-left: 4px solid var(--color-accent); border-radius: var(--radius-md); color: var(--color-text); }

.price-table { width: 100%; border-collapse: collapse; margin: var(--space-md) 0; font-size: var(--font-size-sm); }
.price-table th { background: var(--color-primary-soft); color: var(--color-primary); font-weight: 600; text-align: left; padding: var(--space-sm) var(--space-md); border-bottom: 2px solid var(--color-primary); }
.price-table td { padding: var(--space-sm) var(--space-md); border-bottom: 1px solid var(--color-border); color: var(--color-text-muted); }
.price-table tr:last-child td { border-bottom: none; }

.faq-section { padding-block: var(--space-2xl); background-color: var(--color-bg-soft); }
.faq { margin-bottom: var(--space-md); background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-md); overflow: hidden; }
.faq__question { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: var(--space-md); padding: var(--space-md) var(--space-lg); border: none; background: #fff; font: inherit; font-size: var(--font-size-base); font-weight: 600; text-align: left; color: var(--color-text); cursor: pointer; transition: background-color var(--transition-fast); }
.faq__question:hover { background-color: var(--color-bg-soft); }
.faq__question[aria-expanded="true"] { background-color: var(--color-primary-soft); }
.faq__icon { flex-shrink: 0; width: 1.5rem; height: 1.5rem; display: flex; align-items: center; justify-content: center; background: var(--color-primary); color: #fff; border-radius: 50%; font-size: var(--font-size-base); font-weight: 700; transition: transform var(--transition-base); }
.faq__question[aria-expanded="true"] .faq__icon { transform: rotate(45deg); }
.faq__answer { display: grid; grid-template-rows: 0fr; transition: grid-template-rows var(--transition-base); }
.faq__question[aria-expanded="true"] + .faq__answer { grid-template-rows: 1fr; }
.faq__answer > * { overflow: hidden; padding: 0 var(--space-lg) var(--space-md); margin: 0; color: var(--color-text-muted); }

.cta-section { padding-block: var(--space-2xl); }
.cta-card { padding: var(--space-2xl); text-align: center; background: linear-gradient(135deg, var(--color-primary) 0%, #003bb3 100%); color: #fff; border-radius: var(--radius-xl); box-shadow: 0 16px 48px rgba(0,87,255,0.22); }
.cta-card h2 { color: #fff; }
.cta-card p { margin: 0 auto var(--space-xl); max-width: 56ch; color: rgba(255,255,255,0.88); }
.cta-card .btn--primary { background: #fff; color: var(--color-primary); }
.cta-card .btn--primary:hover { background: var(--color-bg-soft); }
.cta-card__note { margin-top: var(--space-md) !important; font-size: var(--font-size-sm); color: rgba(255,255,255,0.7) !important; }

.site-footer { padding-block: var(--space-xl); border-top: 1px solid var(--color-border); text-align: center; font-size: var(--font-size-sm); color: var(--color-text-muted); }

@media (min-width: 768px) {
  .hero__inner { grid-template-columns: 1.1fr 0.9fr; }
  .hero h1 { font-size: 3rem; }
  .hero__trust { grid-template-columns: repeat(3, 1fr); }
  .article-section h2, .faq-section h2, .cta-card h2 { font-size: 2.25rem; }
}
@media (min-width: 1024px) {
  .hero h1 { font-size: 3.5rem; }
  .hero__lead { font-size: var(--font-size-lg); }
}
@media (max-width: 360px) {
  .hero h1 { font-size: var(--font-size-2xl); }
  .hero__actions { flex-direction: column; }
  .btn { width: 100%; }
}