/* Базовая тема — по умолчанию тёмная */
:root {
  --bg: #0f0f12;
  --bg-elev: #15151a;
  --text: #f2f3f5;
  --muted: #a0a3ab;
  --accent: #5ac8fa;
  --accent-contrast: #061118;
  --ring: 0 0 0 8px rgb(90 200 250 / 12%);
  --logo-height: clamp(40px, 8vw, 72px);
  --logo-max-width: min(60vw, 420px);
  /* Тёмная тема: делаем чёрный логотип светлым */
  --logo-filter: invert(1) brightness(1.15) contrast(1.05);
}

/* Светлая тема */
.light {
  --bg: #ffffff; 
  --bg-elev: #f6f7f9; 
  --text: #0d0f13; 
  --muted: #5b6270; 
  --accent: #007aff; 
  --accent-contrast: #ffffff; 
  /* Светлая тема: оставляем исходный чёрный логотип */
  --logo-filter: none;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  background: radial-gradient(1200px 800px at 80% -10%, rgba(90,200,250,.08), transparent 60%), var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden; /* предотвращаем горизонтальную прокрутку на маленьких iPhone */
}

.container {
  max-width: 920px;
  margin: 0 auto;
  padding: 48px 20px 28px;
  display: grid;
  gap: 32px;
}

.header { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.brand { flex: 1 1 auto; min-width: 0; }
.lang-switch { margin-left: auto; display: inline-flex; background: var(--bg-elev); border-radius: 12px; padding: 4px; border: 1px solid color-mix(in oklab, var(--text) 12%, transparent); }
.lang-btn { appearance: none; border: 0; background: transparent; color: var(--text); font-weight: 700; padding: 8px 10px; border-radius: 8px; cursor: pointer; }
.lang-btn[aria-pressed="true"] { background: var(--accent); color: var(--accent-contrast); }

.theme-toggle {
  appearance: none;
  border: 1px solid color-mix(in oklab, var(--text) 12%, transparent);
  background: var(--bg-elev);
  color: var(--text);
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  cursor: pointer;
  margin-left: 12px;
  transition: transform .06s ease, background .2s ease, border-color .2s ease;
}
.theme-toggle:hover { transform: translateY(-1px); }
.theme-toggle:focus-visible { outline: none; box-shadow: var(--ring); }
.logo-img {
  height: var(--logo-height);
  width: auto;
  max-width: var(--logo-max-width);
  object-fit: contain;
  image-rendering: -webkit-optimize-contrast;
  filter: var(--logo-filter);
}
img, svg { max-width: 100%; height: auto; }
.logo {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-weight: 700;
  letter-spacing: .5px;
  color: var(--accent-contrast);
  background: linear-gradient(160deg, var(--accent), #8fd9ff);
  box-shadow: 0 10px 30px rgba(90,200,250,.2);
}

.brand .name { 
  margin: 0; 
  font-size: clamp(28px, 5vw, 40px);
  line-height: 1.1;
}
.roles { 
  margin: 6px 0 0; 
  color: var(--muted); 
  font-size: clamp(14px, 2.6vw, 18px);
}

.hero {
  position: relative;
  border-radius: 18px;
  background: linear-gradient(180deg, color-mix(in oklab, var(--accent) 12%, transparent), transparent 60%),
              url('./hero.jpg') center/cover no-repeat,
              var(--bg-elev);
  min-height: clamp(160px, 30vh, 360px);
  display: grid;
  align-items: end;
  overflow: hidden;
  border: 1px solid color-mix(in oklab, var(--text) 12%, transparent);
}
.hero-content { padding: 20px; backdrop-filter: blur(2px); }
.hero-title { margin: 0; font-size: clamp(22px, 4.8vw, 36px); }
.hero-sub { margin: 6px 0 0; color: var(--muted); max-width: 60ch; }

.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  appearance: none;
  border: 1px solid color-mix(in oklab, var(--text) 14%, transparent);
  color: var(--text);
  text-decoration: none;
  padding: 12px 16px;
  border-radius: 12px;
  font-weight: 600;
  transition: transform .06s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease;
  background: var(--bg-elev);
}
.btn:hover { transform: translateY(-1px); }
.btn:focus-visible { outline: none; box-shadow: var(--ring); }
.btn.primary { 
  background: var(--accent);
  color: var(--accent-contrast);
  border-color: transparent;
}
.btn.primary:hover { filter: saturate(1.1) brightness(1.05); }

.footer {
  margin-top: 8px;
  display: grid;
  gap: 4px;
  color: var(--muted);
  font-size: 14px;
}

@media (min-width: 800px) {
  .container { padding-top: 72px; }
}