* {
  box-sizing: border-box;
  font-family: 'Segoe UI', sans-serif;
}

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
  display: flex;
  justify-content: center;
  align-items: center;
}

.auth-box {
  background: #fff;
  width: 100%;
  max-width: 900px;
  border-radius: 12px;
  display: flex;
  overflow: hidden;
  box-shadow: 0 15px 40px rgba(0,0,0,.3);
}

.auth-left {
  background: #1e3c72;
  color: #fff;
  padding: 40px;
  width: 40%;
}
.logo {
  width: 140px;          /* ukuran simbol */
  height: 140px;
  margin: 0 auto 20px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.logo img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;   /* PENTING: jaga proporsi */
}
.auth-left h2 {
  margin-top: 0;
}

.auth-right {
  padding: 40px;
  width: 60%;
}

.tabs {
  display: flex;
  margin-bottom: 20px;
}

.tabs button {
  flex: 1;
  padding: 12px;
  border: none;
  background: #eee;
  cursor: pointer;
  font-weight: bold;
}

.tabs button.active {
  background: #1e3c72;
  color: white;
}

form {
  display: none;
}

form.active {
  display: block;
}

input, select {
  width: 100%;
  padding: 10px;
  margin-bottom: 15px;
  border-radius: 6px;
  border: 1px solid #ccc;
}

button.submit {
  width: 100%;
  background: #1e3c72;
  color: white;
  border: none;
  padding: 12px;
  border-radius: 6px;
  cursor: pointer;
}

@media (max-width: 768px) {
  .auth-box {
    flex-direction: column;
  }
  .auth-left, .auth-right {
    width: 100%;
  }
}