:root {
  color-scheme: light;
  --page: #f7f8fa;
  --surface: #ffffff;
  --border: #d7dee8;
  --border-strong: #aeb9c8;
  --text: #18212f;
  --muted: #5c6878;
  --accent: #3b82f6;
  --danger: #b42318;
  --shadow: 0 10px 30px rgba(24, 33, 47, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 14px;
}

.login-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-card {
  width: min(380px, 100%);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow);
  padding: 28px 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.login-card h1 {
  margin: 0;
  font-size: 18px;
  letter-spacing: 0;
}

.login-subtitle {
  margin: -8px 0 4px;
  color: var(--muted);
}

.login-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.login-field span {
  color: var(--muted);
  font-size: 13px;
}

.login-field input {
  height: 40px;
  padding: 0 12px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
}

.login-field input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.18);
}

.login-error {
  margin: 0;
  color: var(--danger);
  font-size: 13px;
}

#login-button {
  height: 40px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

#login-button:hover:not(:disabled) {
  background: #2f6fd6;
}

#login-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}