/* ── Reset & base ── */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-bg: #f8f9fb;
  --color-surface: #ffffff;
  --color-border: #e4e7ec;
  --color-border-hover: #c8ced9;
  --color-text: #111827;
  --color-text-muted: #6b7280;
  --color-accent: #2563eb;
  --color-accent-light: #eff6ff;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.08);
  --max-width: 720px;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ── Header ── */

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

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.lang-toggle {
  display: flex;
  align-items: center;
  padding: 0.3125rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.lang-toggle__divider {
  width: 1px;
  height: 1.25rem;
  background: var(--color-border);
  flex-shrink: 0;
}

.lang-btn {
  min-width: 2.75rem;
  padding: 0.4375rem 0.75rem;
  font-family: var(--font);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  background: transparent;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: color 0.2s, background 0.2s;
}

.lang-btn:hover:not(.active) {
  color: var(--color-text);
  background: var(--color-bg);
}

.lang-btn.active {
  color: var(--color-accent);
  background: var(--color-accent-light);
}

.lang-btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.logo__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #fff;
  background: var(--color-accent);
  border-radius: 8px;
}

.logo__text {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* ── Intro ── */

.main {
  padding: 3rem 0 4rem;
}

.intro {
  margin-bottom: 2rem;
}

.intro__badge {
  display: inline-block;
  margin-bottom: 0.75rem;
  padding: 0.35rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: var(--color-accent-light);
  border-radius: 999px;
}

.intro__title {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.intro__text {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 520px;
}

.intro__note {
  margin-top: 1rem;
  padding: 1rem 1.25rem;
  max-width: 520px;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* ── Site cards ── */

.sites {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.site {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}

.site:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-hover);
  transform: translateY(-1px);
}

.site:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.site__icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--color-accent-light);
  color: var(--color-accent);
}

.site__icon svg {
  width: 22px;
  height: 22px;
}

.site__content {
  flex: 1;
  min-width: 0;
}

.site__name {
  display: block;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.site__desc {
  display: block;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: 0.125rem;
}

.site__url {
  display: block;
  font-size: 0.8125rem;
  color: var(--color-accent);
  margin-top: 0.25rem;
}

.site__arrow {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  color: var(--color-text-muted);
  transition: color 0.2s, transform 0.2s;
}

.site__arrow svg {
  width: 18px;
  height: 18px;
}

.site:hover .site__arrow {
  color: var(--color-accent);
  transform: translate(2px, -2px);
}

/* ── Footer ── */

.footer {
  padding: 1.5rem 0;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.footer__text {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* ── Responsive ── */

@media (max-width: 480px) {
  .main {
    padding: 2rem 0 3rem;
  }

  .intro__title {
    font-size: 1.5rem;
  }

  .site {
    padding: 0.875rem 1rem;
    gap: 0.875rem;
  }

  .site__icon {
    width: 40px;
    height: 40px;
  }
}