/* Global Styles */
    :root {
      --bg-color: #121212;         /* Darker, almost-black gray background */
      --otter-primary: #3772ff;    /* Deep cobalt blue */
      --otter-accent: #70e4ef;     /* Vibrant cyan */
      --text-pink: #ef70d9;        /* Neon pink-magenta */
      --text-lime: #e2ef70;        /* Contrasting lime-yellow */
      --card-bg: #1c1c1c;          /* Inner container card color */
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    }

    body {
      background-color: var(--bg-color);
      color: #ffffff;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      padding: 20px;
      overflow-x: hidden;
    }

    header {
      text-align: center;
      margin-top: 10px;
      margin-bottom: 20px;
    }

    header h1 {
      color: var(--text-pink);
      font-size: 2.5rem;
      text-transform: uppercase;
      letter-spacing: 2px;
      text-shadow: 0 0 10px rgba(239, 112, 217, 0.4);
      margin-bottom: 5px;
    }

    header p {
      color: var(--otter-accent);
      font-size: 1.1rem;
      font-weight: 500;
    }

    /* Main Responsive Container */
    .app-container {
      display: grid;
      grid-template-columns: 1fr;
      gap: 30px;
      width: 100%;
      max-width: 900px;
      align-items: center;
      justify-items: center;
      flex-grow: 1;
    }

    /* Media query for larger tablet and desktop viewports */
    @media (min-width: 768px) {
      .app-container {
        grid-template-columns: 1fr 1fr;
        padding: 20px;
      }
    }

    /* Otter Vector Styling */
    .otter-wrapper {
      position: relative;
      width: 280px;
      height: 350px;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .otter-svg {
      width: 100%;
      height: 100%;
      transition: transform 0.3s ease;
    }

    /* Keyframe Animations */
    @keyframes otterIdle {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-8px); }
    }

    @keyframes otterLaugh {
      0%, 100% { transform: scale(1) translateY(0); }
      20% { transform: scale(1.05) translateY(-15px) rotate(-3deg); }
      40% { transform: scale(0.98) translateY(2px) rotate(3deg); }
      60% { transform: scale(1.05) translateY(-10px) rotate(-3deg); }
      80% { transform: scale(0.98) translateY(2px) rotate(1deg); }
    }

    @keyframes whiskerTwitch {
      0%, 100% { transform: rotate(0deg); }
      50% { transform: rotate(4deg); }
    }

    .otter-idle {
      animation: otterIdle 4s ease-in-out infinite;
    }

    .otter-laughing {
      animation: otterLaugh 1.2s ease-in-out !important;
    }

    .whisker-left {
      transform-origin: 110px 105px;
      animation: whiskerTwitch 3s ease-in-out infinite;
    }
    
    .whisker-right {
      transform-origin: 140px 105px;
      animation: whiskerTwitch 3s ease-in-out infinite reverse;
    }

    /* Display / Interaction Panel */
    .display-panel {
      width: 100%;
      max-width: 420px;
      display: flex;
      flex-direction: column;
      gap: 20px;
      justify-content: center;
    }

    /* Dialogue bubble styling */
    .joke-bubble {
      background-color: var(--card-bg);
      border: 3px solid var(--otter-accent);
      border-radius: 20px;
      padding: 25px;
      position: relative;
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.6), 
                  0 0 15px rgba(112, 228, 239, 0.15);
      min-height: 160px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      transition: all 0.3s ease;
    }

    /* Speech Bubble Tail (visible only on desktop side-by-side) */
    @media (min-width: 768px) {
      .joke-bubble::after {
        content: '';
        position: absolute;
        left: -15px;
        top: 50%;
        transform: translateY(-50%) rotate(45deg);
        width: 25px;
        height: 25px;
        background-color: var(--card-bg);
        border-left: 3px solid var(--otter-accent);
        border-bottom: 3px solid var(--otter-accent);
      }
    }

    .joke-category {
      font-size: 0.8rem;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: var(--otter-accent);
      margin-bottom: 10px;
      font-weight: bold;
    }

    .joke-setup {
      color: var(--text-lime);
      font-size: 1.3rem;
      font-weight: 600;
      line-height: 1.4;
      margin-bottom: 12px;
    }

    .joke-punchline {
      color: var(--text-pink);
      font-size: 1.25rem;
      font-weight: 700;
      line-height: 1.4;
      opacity: 0;
      transform: translateY(10px);
      transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    }

    .joke-punchline.revealed {
      opacity: 1;
      transform: translateY(0);
    }

    /* Button Layout Container */
    .btn-container {
      display: flex;
      flex-direction: column;
      gap: 12px;
      width: 100%;
    }

    /* Alignment rules for screen breaking points */
    @media (min-width: 480px) {
      .btn-container {
        flex-direction: row;
      }
      .joke-btn {
        flex: 1;        /* Stretches to occupy the rest of the layout width */
      }
      .exit-btn {
        flex: 0 0 auto; /* Compact custom size based purely on text length */
      }
    }

    /* Interactive Joke Button base */
    .joke-btn {
      background-color: var(--card-bg);
      border: 3px solid var(--text-pink);
      border-radius: 50px;
      color: var(--text-lime);
      font-size: 1.2rem;
      font-weight: bold;
      padding: 16px 30px;
      cursor: pointer;
      text-transform: uppercase;
      letter-spacing: 1px;
      transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
      outline: none;
      box-shadow: 0 5px 15px rgba(239, 112, 217, 0.15), 
                  inset 0 0 10px rgba(239, 112, 217, 0.05);
    }

    .joke-btn:hover {
      transform: translateY(-3px);
      background-color: var(--text-pink);
      color: var(--card-bg);
      box-shadow: 0 8px 25px rgba(239, 112, 217, 0.4);
    }

    .joke-btn:active {
      transform: translateY(1px);
    }

    /* Interactive Exit Button (Matches size/feel of joke-btn but in Gray) */
    .exit-btn {
      background-color: var(--card-bg);
      border: 3px solid #666666; 
      border-radius: 50px;
      color: #cccccc; 
      font-size: 1.2rem;
      font-weight: bold;
      padding: 16px 30px;
      cursor: pointer;
      text-transform: uppercase;
      letter-spacing: 1px;
      transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
      outline: none;
      box-shadow: 0 5px 15px rgba(102, 102, 102, 0.15), 
                  inset 0 0 10px rgba(102, 102, 102, 0.05);
      
      /* Align SVG door icon inside the button bounds */
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }

    .exit-btn:hover {
      transform: translateY(-3px);
      background-color: #555555;
      color: #ffffff;
      border-color: #888888;
      box-shadow: 0 8px 25px rgba(102, 102, 102, 0.4);
    }

    .exit-btn:active {
      transform: translateY(1px);
    }

    .exit-icon {
      width: 20px;
      height: 20px;
    }

    footer {
      font-size: 0.85rem;
      color: #666;
      margin-top: 30px;
      text-align: center;
    }

    footer a {
      color: var(--otter-accent);
      text-decoration: none;
    }