.brand-prism-scene {
    perspective: 1000px;
    -webkit-perspective: 1000px;
    width: 240px;
    height: 48px;
    margin-bottom: 12px;
    position: relative;
    user-select: none;
  }

  .brand-prism {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    -webkit-transform-style: preserve-3d;
    transform: translateZ(-24px) rotateX(0deg);
    cursor: pointer;
  }

  /* 2 saniyelik garantili 3D dönüş animasyonları */
  .brand-prism.is-flipping-up {
    animation: prismFlipUp 2s cubic-bezier(0.22, 1, 0.36, 1) forwards !important;
  }

  .brand-prism.is-flipping-down {
    animation: prismFlipDown 2s cubic-bezier(0.22, 1, 0.36, 1) forwards !important;
  }

  @keyframes prismFlipUp {
    0% {
      transform: translateZ(-24px) rotateX(0deg);
    }
    100% {
      transform: translateZ(-24px) rotateX(90deg);
    }
  }

  @keyframes prismFlipDown {
    0% {
      transform: translateZ(-24px) rotateX(90deg);
    }
    100% {
      transform: translateZ(-24px) rotateX(0deg);
    }
  }

  .prism-face {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    box-sizing: border-box;
    backface-visibility: visible !important;
    -webkit-backface-visibility: visible !important;
  }

  .prism-face-front {
    transform: rotateX(0deg) translateZ(24px);
    pointer-events: auto;
    z-index: 2;
    overflow: hidden;
  }

  .prism-face-bottom {
    transform: rotateX(-90deg) translateZ(24px);
    pointer-events: none;
    z-index: 1;
  }

  .brand-prism.is-flipping-up .prism-face-front {
    animation: frontFadeOut 2s ease forwards !important;
  }

  .brand-prism.is-flipping-down .prism-face-front {
    animation: frontFadeIn 2s ease forwards !important;
  }

  .brand-prism.is-flipped .prism-face-front {
    pointer-events: none;
    opacity: 0;
  }

  .brand-prism.is-flipped .prism-face-bottom,
  .brand-prism.is-flipping-up .prism-face-bottom {
    pointer-events: auto;
    z-index: 3;
  }

  @keyframes frontFadeOut {
    0%, 60% {
      opacity: 1;
    }
    100% {
      opacity: 0;
    }
  }

  @keyframes frontFadeIn {
    0% {
      opacity: 0;
    }
    40%, 100% {
      opacity: 1;
    }
  }

  .brand-name {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -1px;
    margin: 0;
    line-height: 1;
    background: linear-gradient(135deg, #007aff 0%, #0a84ff 50%, #5ac8fa 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .secret-input-wrapper {
    display: flex;
    align-items: center;
    width: 100%;
    height: 40px;
    background: rgba(255, 255, 255, 0.08);
    border: 1.5px solid rgba(0, 122, 255, 0.6);
    border-radius: 8px;
    padding: 0 10px;
    gap: 8px;
    transition: border-color 0.3s, box-shadow 0.3s;
  }

  .secret-input-wrapper:focus-within {
    border-color: #0a84ff;
    box-shadow: 0 0 12px rgba(10, 132, 255, 0.45);
  }

  .secret-terminal-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: inherit;
    font-size: 0.95rem;
    font-family: inherit;
    min-width: 0;
  }

  .secret-terminal-input::placeholder {
    color: rgba(255, 255, 255, 0.5);
  }

  .secret-close-btn {
    background: transparent;
    border: none;
    color: var(--muted, #888);
    font-size: 1.2rem;
    line-height: 1;
    cursor: pointer;
    padding: 0 4px;
    transition: color 0.2s;
  }

  .secret-close-btn:hover {
    color: #ff3b30;
  }

  .secret-input-wrapper.secret-success {
    border-color: #34c759 !important;
    box-shadow: 0 0 20px rgba(52, 199, 89, 0.75) !important;
  }

  .secret-input-wrapper.secret-error {
    animation: secretShake 0.4s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
    border-color: #ff3b30 !important;
    box-shadow: 0 0 15px rgba(255, 59, 48, 0.5) !important;
  }

  @keyframes secretShake {
    10%, 90% { transform: translate3d(-2px, 0, 0); }
    20%, 80% { transform: translate3d(3px, 0, 0); }
    30%, 50%, 70% { transform: translate3d(-4px, 0, 0); }
    40%, 60% { transform: translate3d(4px, 0, 0); }
  }