:root {
  --bg: #0f172a;
  --card: #111827;
  --text: #f9fafb;
  --muted: #cbd5e1;
  --border: #334155;
  --primary: #22c55e;
  --primary-dark: #16a34a;
  --secondary: #1f2937;
  --danger: #dc2626;
  --warning: #f59e0b;
  --info: #2563eb;
  --radius: 24px;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  min-height: 100%;
  font-family: Arial, Helvetica, sans-serif;
  background: linear-gradient(180deg, #020617 0%, #0f172a 100%);
  color: var(--text);
}

body {
  min-height: 100vh;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.card {
  width: min(100%, 480px);
  background: rgba(17, 24, 39, 0.92);
  border: 1px solid rgba(51, 65, 85, 0.8);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
}

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
}

.logo {
  font-size: 56px;
  line-height: 1;
}

.language-switcher {
  display: inline-flex;
  gap: 8px;
  padding: 4px;
  border: 1px solid rgba(51, 65, 85, 0.8);
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.72);
}

.language-button {
  min-height: 34px;
  width: 38px;
  padding: 0;
  border-radius: 999px;
  background: transparent;
  border: 1px solid transparent;
  font-size: 20px;
  line-height: 1;
}

.language-button.active {
  background: rgba(34, 197, 94, 0.18);
  border-color: rgba(34, 197, 94, 0.7);
}

h1 {
  font-size: 34px;
  margin: 0 0 8px;
}

.subtitle {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.45;
  margin: 0 0 20px;
}

.form {
  display: grid;
  gap: 14px;
}

.label {
  font-size: 18px;
  font-weight: 700;
}

input {
  width: 100%;
  padding: 18px 16px;
  border-radius: 18px;
  border: 2px solid var(--border);
  background: #0b1220;
  color: var(--text);
  font-size: 18px;
}

button, .secondary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 58px;
  border-radius: 18px;
  border: 0;
  font-size: 20px;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
}

.language-switcher .language-button {
  min-height: 34px;
  width: 38px;
  padding: 0;
  border-radius: 999px;
  background: transparent;
  border: 1px solid transparent;
  font-size: 20px;
  font-weight: 400;
  line-height: 1;
}

.language-switcher .language-button.active {
  background: rgba(34, 197, 94, 0.18);
  border-color: rgba(34, 197, 94, 0.7);
}

.primary-button {
  background: var(--primary);
  color: #04130a;
}
.primary-button:hover { background: var(--primary-dark); }

.secondary-button, .secondary-link {
  background: var(--secondary);
  color: var(--text);
  border: 1px solid var(--border);
}

.status {
  border-radius: 18px;
  padding: 16px;
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 16px;
}
.status.success { background: rgba(34, 197, 94, 0.18); border: 1px solid rgba(34, 197, 94, 0.45); }
.status.warning { background: rgba(245, 158, 11, 0.18); border: 1px solid rgba(245, 158, 11, 0.45); }
.status.error { background: rgba(220, 38, 38, 0.18); border: 1px solid rgba(220, 38, 38, 0.45); }
.status.info { background: rgba(37, 99, 235, 0.18); border: 1px solid rgba(37, 99, 235, 0.45); }
.hidden { display: none; }

.help-box {
  margin-top: 20px;
  border-top: 1px solid var(--border);
  padding-top: 16px;
  color: var(--muted);
  display: grid;
  gap: 6px;
  font-size: 16px;
}

@media (max-width: 480px) {
  .card { padding: 22px; }
  h1 { font-size: 30px; }
  .subtitle, .label, input { font-size: 17px; }
  button, .secondary-link, .status { font-size: 18px; }
}