* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: #f4f7f4;
  color: #1a1a1a;
}

.hidden { display: none !important; }

.login-box {
  max-width: 380px;
  margin: 60px auto;
  padding: 24px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

h1 { color: #1b5e20; font-size: 24px; margin: 0 0 4px; }
.sub { color: #666; margin: 0 0 20px; }

label { display: block; margin: 12px 0 4px; font-weight: 600; }

input {
  width: 100%;
  padding: 12px;
  font-size: 16px;
  border: 1px solid #bbb;
  border-radius: 8px;
}

button {
  width: 100%;
  margin-top: 18px;
  padding: 14px;
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  background: #1b5e20;
  border: 0;
  border-radius: 8px;
}

button:disabled { opacity: 0.6; }

.error { color: #c62828; margin-top: 12px; min-height: 20px; }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: #1b5e20;
  color: #fff;
}

.topbar button {
  width: auto;
  margin: 0;
  padding: 8px 14px;
  background: #fff;
  color: #1b5e20;
}

.content { padding: 16px; }