.contact-hero-pattern {
    background-image:
      radial-gradient(circle at 10% 40%, rgba(57, 170, 230, 0.12) 0%, transparent 40%),
      radial-gradient(circle at 90% 60%, rgba(57, 170, 230, 0.08) 0%, transparent 35%);
  }
  .channel-card {
    transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
  }
  .channel-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(10, 35, 66, 0.12);
  }
  .channel-icon {
    width: 48px; height: 48px; border-radius: 14px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.15rem; flex-shrink: 0;
    transition: transform .3s ease;
  }
  .channel-card:hover .channel-icon { transform: scale(1.1); }
  .form-input {
    width: 100%;
    border: 1.5px solid #e2e8f0;
    border-radius: 12px;
    padding: 12px 16px;
    font-size: 14px;
    color: #1e293b;
    background: #fff;
    transition: border-color .25s ease, box-shadow .25s ease;
    outline: none;
  }
  .form-input::placeholder { color: #94a3b8; }
  .form-input:focus {
    border-color: #39AAE6;
    box-shadow: 0 0 0 3px rgba(57, 170, 230, 0.12);
  }
  .form-input.error {
    border-color: #ef4444;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
  }
  .form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: #334155;
    margin-bottom: 6px;
  }
  .form-error-msg {
    font-size: 12px;
    color: #ef4444;
    margin-top: 4px;
    display: none;
  }
  .form-error-msg.show { display: block; }
  .toast {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 9999;
    padding: 16px 24px;
    border-radius: 14px;
    font-size: 14px;
    font-weight: 600;
    box-shadow: 0 12px 40px rgba(0,0,0,0.15);
    transform: translateX(120%);
    transition: transform .4s cubic-bezier(.4,0,.2,1);
    max-width: 400px;
  }
  .toast.show { transform: translateX(0); }
  .toast-success { background: #065f46; color: #d1fae5; }
  .toast-error { background: #991b1b; color: #fecaca; }
  @keyframes spin-small {
    to { transform: rotate(360deg); }
  }
  .spinner {
    display: inline-block;
    width: 16px; height: 16px;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spin-small .6s linear infinite;
    vertical-align: middle;
    margin-right: 6px;
  }