:root {
        /* Brighter, elegant celestial palette for perfect logo visibility */
        --bg-color: #e7e3fb;
        --accent-start: #ff2a5f;
        --accent-end: #7928ca;
        --card-bg: #ffffff;
        --card-border: #e3ddf0;
        --text-primary: #1c1135;
        --text-secondary: #6d28d9;
        --text-muted: #6b6282;
      }

      * {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
      }

      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
        /* Rich, clean iridescent light radial gradient background */
        background: radial-gradient(circle at 50% 50%, #ffffff 0%, var(--bg-color) 100%);
        color: var(--text-primary);
        min-height: 100vh;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        align-items: center;
        padding: 3rem 1.5rem;
      }

      header {
        text-align: center;
        margin-bottom: 2.5rem;
      }

      .brand-logo {
        max-width: 150px;
        height: auto;
        margin-bottom: 1.2rem;
        transition: transform 0.3s ease;
      }

      .brand-logo:hover {
        transform: scale(1.05);
      }

      header h1 {
        font-size: 2.6rem;
        font-weight: 800;
        margin-bottom: 0.6rem;
        background: linear-gradient(135deg, var(--accent-start) 0%, #d53f8c 40%, var(--accent-end) 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        letter-spacing: -0.5px;
      }

      header p {
        color: var(--text-muted);
        font-size: 1rem;
        font-weight: 500;
      }

      /* Stacked container */
      .stacked-container {
        width: 100%;
        max-width: 530px;
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
      }

      /* Cards structure with refined light-mode shadows */
      .control-panel, .canvas-panel {
        background-color: var(--card-bg);
        border: 2px solid var(--card-border);
        padding: 2.2rem;
        border-radius: 24px;
        box-shadow: 0 15px 35px rgba(121, 40, 202, 0.05),
                    0 5px 15px rgba(0, 0, 0, 0.03);
        position: relative;
        overflow: hidden;
      }

      #quote-generator-form {
        display: flex;
        flex-direction: column;
        gap: 1.2rem;
      }

      #topic {
        width: 100%;
        padding: 1rem 1.2rem;
        border-radius: 14px;
        border: 2px solid var(--card-border);
        background-color: #faf9fd;
        color: var(--text-primary);
        font-size: 1rem;
        outline: none;
        transition: all 0.3s ease;
      }

      #topic:focus {
        border-color: var(--accent-start);
        box-shadow: 0 0 12px rgba(255, 42, 95, 0.15);
        background-color: #ffffff;
      }

      #submit-btn {
        width: 100%;
        padding: 1rem;
        border-radius: 14px;
        border: none;
        background: linear-gradient(135deg, var(--accent-start) 0%, var(--accent-end) 100%);
        color: white;
        font-size: 1.1rem;
        font-weight: 700;
        cursor: pointer;
        transition: all 0.3s ease;
        box-shadow: 0 4px 15px rgba(255, 42, 95, 0.25);
      }

      #submit-btn:hover {
        opacity: 0.95;
        transform: translateY(-1px);
        box-shadow: 0 6px 20px rgba(255, 42, 95, 0.35);
      }

      #submit-btn:active {
        transform: translateY(1px);
      }

      #submit-btn:disabled {
        background: #e1dbe6;
        color: var(--text-muted);
        cursor: not-allowed;
        box-shadow: none;
        transform: none;
      }

      /* Quick-pick Presets styling */
      .presets-container {
        margin-top: 1.2rem;
      }

      .presets-label {
        font-size: 0.8rem;
        color: var(--text-muted);
        margin-bottom: 0.6rem;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 0.5px;
      }

      .pills-grid {
        display: flex;
        flex-wrap: wrap;
        gap: 0.5rem;
      }

      .preset-pill {
        background-color: #f5f2fc;
        border: 1px solid var(--card-border);
        color: var(--text-secondary);
        padding: 0.5rem 0.9rem;
        border-radius: 20px;
        font-size: 0.85rem;
        cursor: pointer;
        transition: all 0.2s ease;
        font-weight: 500;
      }

      .preset-pill:hover {
        border-color: var(--accent-start);
        color: #ffffff;
        background: linear-gradient(135deg, var(--accent-start) 0%, var(--accent-end) 100%);
      }

      /* Dynamic Canvas & Output styling */
      .canvas-glow {
        position: absolute;
        top: -50%;
        left: -50%;
        width: 200%;
        height: 200%;
        background: radial-gradient(circle, rgba(121, 40, 202, 0.04) 0%, rgba(0, 0, 0, 0) 70%);
        pointer-events: none;
      }

      .quote-display {
        min-height: 120px;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        align-items: center;
        gap: 1.5rem;
        z-index: 1;
        position: relative;
      }

      #quote {
        font-size: 1.3rem;
        font-style: italic;
        line-height: 1.6;
        text-align: center;
        color: #2e1e55;
        text-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
        width: 100%;
        font-weight: 500;
      }

      .loading-text {
        color: var(--text-secondary);
        font-size: 1.1rem;
        font-style: normal;
        font-weight: 600;
      }

      .options-container {
        display: none; /* Initially hidden, visible once response arrives */
        gap: 0.8rem;
        justify-content: center;
        width: 100%;
      }

      .action-btn {
        padding: 0.6rem 1.2rem;
        border-radius: 12px;
        border: 1px solid var(--card-border);
        background-color: #f5f2fc;
        color: var(--text-secondary);
        font-size: 0.85rem;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.2s ease;
      }

      .action-btn:hover {
        border-color: var(--accent-start);
        color: #ffffff;
        background: linear-gradient(135deg, var(--accent-start) 0%, var(--accent-end) 100%);
      }

      /* Elegant Footer links */
      footer {
        margin-top: 3.5rem;
        text-align: center;
        font-size: 0.8rem;
        color: var(--text-muted);
        line-height: 1.6;
        width: 100%;
      }

      footer a {
        color: var(--text-secondary);
        text-decoration: none;
        font-weight: 600;
        border-bottom: 1px dashed var(--text-secondary);
        transition: all 0.25s ease;
      }

      footer a:hover {
        color: var(--accent-start);
        border-bottom: 1px solid var(--accent-start);
      }