:root {
  color-scheme: light dark;
  --bg: #f4f3ef;
  --card: #ffffff;
  --text: #1c1c1c;
  --muted: #6b6b6b;
  --accent: #d9633b;
  --accent-hover: #c1502b;
  --border: #e2e0da;
  --error: #b3261e;
  --success: #2e7d32;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17140f;
    --card: #221e18;
    --text: #f2ede4;
    --muted: #a89f90;
    --accent: #e8763f;
    --accent-hover: #f28a54;
    --border: #353026;
    --error: #ff6b60;
    --success: #6fcf76;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.card {
  width: 100%;
  max-width: 380px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

h1 {
  margin: 0 0 4px;
  font-size: 1.6rem;
}

.subtitle {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 0.95rem;
}

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

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--muted);
}

input {
  font-size: 1rem;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
}

input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

button {
  margin-top: 8px;
  padding: 12px;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  transition: background 0.15s ease;
}

button:hover {
  background: var(--accent-hover);
}

button:disabled {
  opacity: 0.6;
  cursor: default;
}

.result {
  margin-top: 18px;
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 0.9rem;
  line-height: 1.4;
}

.result.error {
  background: color-mix(in srgb, var(--error) 12%, transparent);
  color: var(--error);
}

.result.success {
  background: color-mix(in srgb, var(--success) 12%, transparent);
  color: var(--success);
}