:root {
  color-scheme: dark;
  --bg: #040813;
  --bg-2: #0a1123;
  --text: #f5f7ff;
  --muted: #90a0bb;
  --accent: #7fb3ff;
  --accent-2: #8b8cff;
  --glass: rgba(11, 17, 33, 0.76);
  --glass-strong: rgba(17, 24, 42, 0.9);
  --border: rgba(255,255,255,0.13);
  --shadow: 0 24px 70px rgba(2, 6, 23, 0.42);
  --radius: 28px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  line-height: 1.6;
  background:
    radial-gradient(circle at 10% 20%, rgba(127, 179, 255, 0.18), transparent 24%),
    radial-gradient(circle at 90% 10%, rgba(139, 140, 255, 0.16), transparent 26%),
    linear-gradient(135deg, var(--bg) 0%, var(--bg-2) 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(255,255,255,0.06) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.45), transparent 82%);
}

img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
.container { width: min(1180px, calc(100% - 2rem)); margin: 0 auto; }
.topbar { position: sticky; top: 0; z-index: 30; padding: 1rem 0; }
.topbar-inner {
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
  padding: 0.8rem 1rem; border-radius: 999px;
  background: var(--glass);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
}
.brand { display: flex; align-items: center; gap: 0.7rem; font-weight: 700; letter-spacing: -0.01em; }
.brand-mark {
  width: 42px; height: 42px; border-radius: 14px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: white;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.25);
}
.brand-mark svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linejoin: round; stroke-linecap: round; }
.header-actions { display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; }
.lang-switcher {
  display: inline-flex; gap: 0.3rem; padding: 0.3rem; border-radius: 999px; background: rgba(255,255,255,0.06); border: 1px solid var(--border);
}
.lang-btn {
  border: none; background: transparent; color: var(--muted); padding: 0.5rem 0.7rem; border-radius: 999px; cursor: pointer; transition: all 180ms ease;
}
.lang-btn.active, .lang-btn:hover { color: white; background: rgba(127,179,255,0.22); }
.swap-btn, .chip, .button {
  border: 1px solid var(--border); background: var(--glass-strong); color: var(--text); border-radius: 999px; cursor: pointer;
  transition: transform 220ms cubic-bezier(.2,.9,.25,1), box-shadow 220ms ease, border-color 220ms ease, background 220ms ease;
}
.swap-btn:hover, .chip:hover, .button:hover { transform: translateY(-2px) scale(1.01); box-shadow: 0 10px 24px rgba(127,179,255,0.18); border-color: rgba(127,179,255,0.4); }
.button { padding: 0.7rem 0.95rem; display: inline-flex; align-items: center; justify-content: center; gap: 0.45rem; text-decoration: none; }
.button.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: white; border-color: transparent; }
.button.secondary { background: rgba(255,255,255,0.05); }
.page { padding: 1.2rem 0 3rem; }
.hero { display: grid; grid-template-columns: 1.02fr 0.98fr; gap: 1.25rem; align-items: center; padding: 1rem 0 1.4rem; }
.hero-copy { padding: 1rem 0; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 0.45rem; margin-bottom: 0.75rem; padding: 0.38rem 0.7rem; border-radius: 999px;
  background: rgba(127,179,255,0.14); color: var(--accent); font-size: 0.76rem; letter-spacing: 0.2em; text-transform: uppercase; font-weight: 700;
}
.hero-copy h1 { margin: 0 0 0.8rem; font-size: clamp(2.1rem, 3.4vw, 3.1rem); line-height: 1.05; letter-spacing: -0.04em; max-width: 12ch; }
.hero-copy p { margin: 0 0 1rem; color: var(--muted); max-width: 58ch; font-size: 1rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-bottom: 1rem; }
.hero-badges { display: flex; flex-wrap: wrap; gap: 0.55rem; }
.pill, .status-pill {
  display: inline-flex; align-items: center; gap: 0.4rem; border-radius: 999px; padding: 0.45rem 0.7rem; background: rgba(127,179,255,0.14); color: var(--accent); font-size: 0.86rem; font-weight: 600;
}
.pill svg, .feature-icon svg, .input-shell svg, .swap-btn svg {
  width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round;
}
.glass-card {
  position: relative; overflow: hidden;
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
  animation: glassRise 700ms cubic-bezier(.2,.9,.25,1);
}
.glass-card::before {
  content: "";
  position: absolute; inset: -1px; border-radius: inherit; padding: 1px; background: linear-gradient(135deg, rgba(255,255,255,0.28), rgba(255,255,255,0)); -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0); -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none;
}
.converter-card { padding: 1.1rem; }
.card-head { display: flex; justify-content: space-between; align-items: center; gap: 1rem; margin-bottom: 1rem; }
.card-label { margin: 0 0 0.2rem; font-size: 0.8rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--accent); font-weight: 700; }
.card-head h2 { margin: 0; font-size: 1.1rem; }
.converter-form { display: grid; gap: 0.8rem; }
.field { display: flex; flex-direction: column; gap: 0.4rem; }
.field span { font-size: 0.9rem; color: var(--muted); }
.input-shell {
  position: relative; display: flex; align-items: center; gap: 0.6rem;
  padding: 0.78rem 0.9rem; border-radius: 16px; border: 1px solid var(--border); background: rgba(255,255,255,0.05);
}
.input-shell svg { color: var(--muted); }
.input, select { width: 100%; border: none; outline: none; background: transparent; color: var(--text); padding: 0; }
.input::placeholder { color: var(--muted); }
.suggestions {
  position: absolute; z-index: 10; top: calc(100% + 0.35rem); left: 0; right: 0; display: none;
  padding: 0.45rem; border-radius: 18px; background: var(--glass-strong); border: 1px solid var(--border); box-shadow: var(--shadow);
  opacity: 0; transform: translateY(6px); transition: opacity 180ms ease, transform 180ms ease;
}
.suggestions.is-open { display: grid; gap: 0.4rem; opacity: 1; transform: translateY(0); }
.picker-toolbar { display: flex; justify-content: space-between; align-items: center; gap: 0.6rem; padding: 0.25rem 0.1rem 0.35rem; }
.picker-tabs { display: flex; gap: 0.35rem; }
.picker-tab {
  border: none; padding: 0.38rem 0.62rem; border-radius: 999px; background: rgba(255,255,255,0.06); color: var(--muted); cursor: pointer; transition: all 180ms ease;
}
.picker-tab.active, .picker-tab:hover { background: rgba(127,179,255,0.2); color: white; }
.picker-list { display: grid; gap: 0.35rem; max-height: 280px; overflow-y: auto; padding-right: 0.15rem; }
.picker-item {
  display: flex; justify-content: space-between; align-items: center; gap: 0.8rem; width: 100%; padding: 0.7rem 0.72rem; border-radius: 12px;
  background: transparent; border: none; text-align: left; color: var(--text); cursor: pointer; transition: background 180ms ease, transform 180ms ease;
}
.picker-item:hover { background: rgba(127,179,255,0.16); transform: translateX(2px); }
.picker-item-main { display: flex; flex-direction: column; gap: 0.06rem; }
.picker-item-code { font-weight: 700; }
.picker-item-name { font-size: 0.86rem; color: var(--muted); }
.picker-item-type { font-size: 0.78rem; color: var(--accent); background: rgba(127,179,255,0.12); padding: 0.3rem 0.5rem; border-radius: 999px; }
.empty-state { padding: 0.8rem; border-radius: 12px; color: var(--muted); background: rgba(255,255,255,0.04); }
.swap-btn { width: 44px; height: 44px; display: grid; place-items: center; margin: 0.1rem auto 0; }
.result-box {
  margin-top: 1rem; padding: 0.95rem 1rem; border-radius: 18px; background: linear-gradient(135deg, rgba(127,179,255,0.16), rgba(139,140,255,0.1)); border: 1px solid rgba(127,179,255,0.18);
}
.result-label { font-size: 0.78rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted); }
.result-value { font-size: clamp(1.35rem, 2.2vw, 1.8rem); font-weight: 700; margin: 0.2rem 0; }
.result-meta { color: var(--muted); font-size: 0.92rem; }
.quick-pairs { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.85rem; }
.chip { padding: 0.55rem 0.75rem; font-size: 0.9rem; }
.info-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.8rem; margin-top: 0.8rem; }
.feature-card { padding: 1rem; min-height: 190px; }
.feature-icon {
  width: 44px; height: 44px; border-radius: 14px; display: grid; place-items: center; margin-bottom: 0.8rem;
  background: linear-gradient(135deg, rgba(127,179,255,0.2), rgba(139,140,255,0.16)); color: var(--accent);
}
.feature-card h3 { margin: 0 0 0.35rem; font-size: 1rem; }
.feature-card p { margin: 0; color: var(--muted); }
[data-animate] { opacity: 0; transform: translateY(10px); transition: opacity .35s ease, transform .35s ease; }
[data-animate].is-visible { opacity: 1; transform: translateY(0); }
body.lang-switching .hero-copy,
body.lang-switching .glass-card,
body.lang-switching .feature-card,
body.lang-switching .pill,
body.lang-switching .button,
body.lang-switching .lang-btn {
  opacity: 0.66;
  transform: translateY(6px);
  transition: opacity 180ms ease, transform 180ms ease;
}
@keyframes glassRise { from { opacity: 0; transform: translateY(16px) scale(.98); } to { opacity: 1; transform: translateY(0) scale(1); } }
@media (max-width: 900px) { .hero, .info-grid { grid-template-columns: 1fr; } }
@media (max-width: 640px) {
  .topbar-inner { border-radius: 20px; }
  .header-actions { width: 100%; justify-content: flex-end; }
  .hero-copy h1 { max-width: none; font-size: 2rem; }
  .hero-actions { flex-direction: column; }
}