* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, sans-serif;
}

body {
  background-color: #0f172a;
  color: #e2e8f0;
  line-height: 1.5;
}

header {
  background-color: #1e293b;
  padding: 15px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid #334155;
}

.brand {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-title {
  font-size: 18px;
  font-weight: bold;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-sub {
  font-size: 12px;
  color: #94a3b8;
}

.lang-switcher {
  flex-shrink: 0;
  display: flex;
  gap: 5px;
}

.lang-btn {
  background: #334155;
  border: none;
  color: #94a3b8;
  padding: 4px 8px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
}

.lang-btn.active {
  background: #38bdf8;
  color: #fff;
}

.container {
  max-width: 600px;
  margin: 0 auto;
  padding: 20px;
}

.card {
  background: #1e293b;
  border-radius: 8px;
  padding: 15px;
  margin-bottom: 15px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.card-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 10px;
  color: #38bdf8;
}

.form-row {
  display: flex;
  gap: 10px;
}

input, select, textarea {
  min-width: 0;
}

.form-input {
  flex: 1;
  background: #0f172a;
  border: 1px solid #334155;
  color: #fff;
  padding: 8px;
  border-radius: 4px;
  outline: none;
}

.form-input:focus {
  border-color: #38bdf8;
}

.btn {
  background: #38bdf8;
  color: #0f172a;
  border: none;
  border-radius: 4px;
  font-weight: bold;
  cursor: pointer;
}

.btn:hover {
  background: #0ea5e9;
}