body {
  font-family: 'Helvetica Neue', sans-serif;
  background: #f2f4f8;
  color: #333;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  background: #0047ab;
  color: white;
  padding: 1rem;
  text-align: center;
  font-size: 1.4rem;
  font-weight: bold;
  letter-spacing: 0.5px;
}

main {
  flex: 1;
  padding: 1.5rem 1.2rem;
  max-width: 700px;
  margin: 0 auto;
}

form.block {
  padding: 1rem;
  border-radius: 8px;
  background: white;
  box-shadow: 0 0 10px rgba(0,0,0,0.05);
}

textarea {
  width: 100%;
  font-size: 1rem;
  padding: 0.8rem;
  border-radius: 8px;
  border: 1px solid #ccc;
  resize: vertical;
  box-sizing: border-box;
  background: #fff;
  margin-bottom: 1rem;
}

input[type="email"],
input[type="password"],
input[type="text"] {
  width: 100%;
  font-size: 1rem;
  padding: 10px;
  border-radius: 6px;
  border: 1px solid #ccc;
  box-sizing: border-box;
}

button {
  background-color: #0047ab;
  color: white;
  border: none;
  padding: 0.7rem 1.2rem;
  border-radius: 6px;
  font-size: 1rem;
  cursor: pointer;
  margin: 0.2rem 0.5rem 1rem 0;
  transition: background 0.2s ease;
}

button:hover {
  background-color: #0058d9;
}

.block {
  background: #ffffff;
  border-radius: 8px;
  padding: 1rem;
  margin-top: 1.2rem;
  box-shadow: 0 0 10px rgba(0,0,0,0.05);
}

.label {
  font-weight: 600;
  margin: 0.5rem 0 0.3rem;
  display: block;
}

.feedback-icons {
  margin-top: 1rem;
  text-align: center;
}

.feedback-icons button {
  font-size: 1.4rem;
  background: none;
  border: none;
  cursor: pointer;
  margin-right: 1rem;
}

.linkbar {
  text-align: center;
  margin-top: 2rem;
}

.linkbar a {
  margin: 0 1rem;
  text-decoration: none;
  font-weight: 600;
  color: #0047ab;
}

footer {
  text-align: center;
  padding: 1rem 0;
  background: #f2f4f8;
  color: #999;
  font-size: 0.9rem;
}

.logo {
  display: block;
  margin: 2rem auto;
  width: 160px;
  height: 160px;
  background-image: url('logo-tands-500x500px-transparent.png');
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
  text-indent: -9999px;
  overflow: hidden;
  border-radius: 12px;
}

.loading-spinner {
      display: inline-block;
      width: 24px;
      height: 24px;
      border: 3px solid #ccc;
      border-top-color: #0047ab;
      border-radius: 50%;
      animation: spin 1s linear infinite;
      margin: 0 auto;
}
    @keyframes spin {
      to { transform: rotate(360deg); }
    }
    .error {
      border: 2px solid red !important;
    }
    .center-buttons {
      text-align: center;
      margin-top: 1rem;
    }
    textarea {
      box-sizing: border-box;
    }
    .overlay {
      position: fixed;
      top: 0; left: 0;
      width: 100%; height: 100%;
      background: rgba(255,255,255,0.9);
      display: flex;
      align-items: center;
      justify-content: center;
      z-index: 999;
      font-size: 2rem;
      font-weight: bold;
      color: green;
    }
    .overlay-icon {
      font-size: 4rem;
      margin-bottom: 1rem;
    }
    .feedback-icons button:disabled {
      opacity: 0.5;
      pointer-events: none;
    }