* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Segoe UI', Arial, sans-serif;
  background: #0f1115;
  color: #e8e8e8;
}

.login-body {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-card {
  background: #1a1d24;
  padding: 40px;
  border-radius: 12px;
  width: 360px;
  text-align: center;
  box-shadow: 0 10px 40px rgba(0,0,0,0.4);
}

.login-card h1 { margin: 0 0 4px; font-size: 22px; }
.subtitle { color: #9aa0ab; margin-bottom: 24px; }

label { display: block; text-align: left; margin: 14px 0 6px; font-size: 14px; color: #b8bec9; }

input[type="text"], input[type="password"], input[type="url"] {
  width: 100%;
  padding: 12px;
  border-radius: 8px;
  border: 1px solid #2c313c;
  background: #12141a;
  color: #fff;
  font-size: 14px;
}

button {
  margin-top: 20px;
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 8px;
  background: linear-gradient(135deg, #ff6a00, #ee0979);
  color: #fff;
  font-weight: bold;
  font-size: 15px;
  cursor: pointer;
}
button:hover { opacity: 0.9; }

.error-box { background: #4a1919; color: #ff9d9d; padding: 10px; border-radius: 8px; margin-bottom: 10px; }
.success-box { background: #163d24; color: #86e6a5; padding: 12px 16px; border-radius: 8px; margin-bottom: 20px; }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 32px;
  background: #1a1d24;
  border-bottom: 1px solid #262a33;
}
.topbar h2 { margin: 0; font-size: 18px; }
.logout-btn {
  width: auto;
  margin: 0;
  padding: 8px 16px;
  background: #2c313c;
  font-size: 13px;
}

.container { max-width: 720px; margin: 32px auto; padding: 0 20px; }

.card {
  background: #1a1d24;
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 20px;
  border: 1px solid #262a33;
}
.card h3 { margin-top: 0; }
.hint { color: #9aa0ab; font-size: 13px; }
.optional { color: #6b7280; font-weight: normal; }

.api-box {
  display: inline-block;
  background: #12141a;
  padding: 8px 14px;
  border-radius: 6px;
  color: #ffb86b;
}

.preview-box { margin-top: 14px; }
.preloader-preview {
  max-width: 120px;
  max-height: 120px;
  border-radius: 8px;
  border: 1px solid #2c313c;
  padding: 8px;
  background: #000;
}