* {
  box-sizing: border-box;
  font-family: "Calibri", Calibri, "Tahoma", sans-serif;
}

body {
  margin: 0;
  background-color: #f4f5f7;
  color: #1f1f1f;
}

.container {
  max-width: 1100px;
  margin: 40px auto;
  padding: 24px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

h1,
h2 {
  margin: 0;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 32px;
}

.logo {
  width: 374px;
  height: 82px;
  object-fit: contain;
}

.sections-grid {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.calculator {
  flex: 1;
  min-width: 280px;
  padding: 24px;
  border-radius: 16px;
  border: 1px solid #e2e8f0;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.02);
}

.calculator.crypto {
  background: #f8fafc;
}

.calculator.forex {
  background: #f5f3ff;
}

form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

label {
  display: flex;
  flex-direction: column;
  font-weight: 600;
  gap: 6px;
}

input,
select {
  padding: 10px 12px;
  border: 1px solid #d0d5dd;
  border-radius: 8px;
  font-size: 1rem;
}

button {
  padding: 12px;
  border: none;
  border-radius: 8px;
  background-color: #4f46e5;
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s ease;
}

button:hover {
  background-color: #4338ca;
}

.result {
  margin-top: 24px;
  padding: 12px;
  border-radius: 8px;
  background: #e0f2fe;
  color: #0f172a;
  text-align: center;
  font-weight: 700;
}

.error {
  margin-top: 24px;
  padding: 12px;
  border-radius: 8px;
  background: #fee2e2;
  color: #991b1b;
  text-align: center;
  font-weight: 600;
}