:root {
    --primary-color: #FFB6C1; /* Baby Pink */
    --secondary-color: #98FB98; /* Pale Green */
    --accent-color: #FFDAE0; /* Lighter Pink */
    --text-color: #555;
    --bg-color: #FFF0F5; /* Lavender Blush - soft background */
    --border-color: #FFC0CB; /* Pink */
    --header-font: 'Pacifico', cursive;
    --body-font: 'Quicksand', sans-serif;
}

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

body {
    font-family: var(--body-font);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    padding-top: 140px;
     /* Subtle repeating pattern */
    background-image: linear-gradient(45deg, var(--accent-color) 25%, transparent 25%),
                      linear-gradient(-45deg, var(--accent-color) 25%, transparent 25%),
                      linear-gradient(45deg, transparent 75%, var(--accent-color) 75%),
                      linear-gradient(-45deg, transparent 75%, var(--accent-color) 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

header {
    background-color: var(--primary-color);
    padding: 1rem 0 0.5rem 0;
    text-align: center;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    border-bottom: 3px dashed var(--secondary-color);
}

header h1 {
    font-family: var(--header-font);
    color: white;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
    margin-bottom: 0.5rem;
    font-size: 2.5rem;
}

nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    padding: 0;
    margin: 0;
    text-align: center;
  }
  
  nav ul li {
    margin: 0;
}


nav ul li a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: bold;
    padding: 5px 10px;
    border-radius: 10px;
    transition: background-color 0.3s ease, color 0.3s ease;
}

nav ul li a:hover,
nav ul li a.active {
    background-color: var(--secondary-color);
    color: white;
}

main {
    max-width: 900px;
    margin: 2rem auto;
    padding: 1rem;
    background-color: rgba(255, 255, 255, 0.9); /* Slightly transparent background */
    border-radius: 15px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
}

section {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background-color: white;
    border: 2px dotted var(--primary-color);
    border-radius: 10px;
}

section h2 {
    font-family: var(--header-font);
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 1rem;
    font-size: 2rem;
}

.content-box {
    background-color: #fff; /* Ensure content background is solid */
    padding: 15px;
    border-radius: 8px;
    /* border: 1px solid var(--border-color); */ /* Optional: add border to inner box */
}

.content-box p, .content-box ul li {
     margin-bottom: 0.8rem;
}

.content-box ul {
    list-style-type: '💖'; /* Custom bullet point */
    padding-left: 25px;
}
.content-box ul li::marker {
    margin-right: 5px; /* Space after bullet */
}

.update-columns {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap; /* Allow wrapping on smaller screens */
}

.update-box {
    flex: 1; /* Each box takes equal space */
    min-width: 250px; /* Minimum width before wrapping */
    border: 1px dashed var(--secondary-color);
    background-color: #F0FFF0; /* Honeydew - light green background */
}

.update-box h3 {
    color: #2E8B57; /* SeaGreen */
    margin-bottom: 0.5rem;
    text-align: center;
    font-family: var(--header-font);
}
.update-box h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-weight: bold;
}
.update-box a {
    color: var(--primary-color);
    font-weight: bold;
    text-decoration: none;
}
.update-box a:hover {
    text-decoration: underline;
}


footer {
    text-align: center;
    margin-top: 2rem;
    padding: 1rem;
    color: var(--text-color);
    font-size: 0.9rem;
}

/* Simple fade-in animation */
body {
    animation: fadeIn 1s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Responsive adjustments */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    nav ul li {
        margin: 0 5px;
    }
    nav ul li a {
        padding: 4px 8px;
    }
    main {
        margin: 1rem auto;
        padding: 0.5rem;
    }
    section {
        padding: 1rem;
    }
    .update-columns {
        flex-direction: column; /* Stack columns */
    }
}

@media (max-width: 480px) {
     body {
        padding-top: 130px; /* Adjust for potentially taller header */
     }
    header h1 {
        font-size: 1.5rem;
    }
     nav ul {
        padding: 0.2rem 0.3rem;
    }
    nav ul li {
       display: block; /* Stack nav items */
       margin: 5px 0;
    }
    nav ul li a {
        display: block; /* Make links full width */
    }
    section h2 {
        font-size: 1.5rem;
    }
}

.expandable {
    margin-top: 1rem;
}

.expand-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    font-weight: bold;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.expand-btn:hover {
    background-color: var(--secondary-color);
    color: white;
}

.expand-content {
    margin-top: 1rem;
    padding: 0.75rem;
    background-color: var(--accent-color);
    border-radius: 8px;
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.social-icons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 0.75rem;
    margin-bottom: 0.5rem;
}

.social-icons a {
    display: inline-block;
    padding: 4px;
    border-radius: 6px;
    background-color: transparent;
    text-decoration: none;
    outline: none !important;
    border: none !important;
    box-shadow: none !important;
}

.social-icons a:focus-visible {
    outline: none !important;
    box-shadow: none !important;
}

.social-icons img {
    display: block;
    width: 16px;
    height: 16px;
    image-rendering: crisp-edges;
    border: none !important;
    outline: none !important;
}

.about-img {
    display: block;
    margin: 1rem auto;
    max-width: 120px;
    border-radius: 50%;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}


#joint-angle-sliders {
    padding: 10px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

#music-player {
    position: fixed;
    bottom: 0.5rem;
    right: 0.5rem;
    width: 320px;
    max-width: 90%;
    background-color: var(--accent-color);
    border: 2px dashed var(--primary-color);
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    border-radius: 10px;
    z-index: 1001;
    transition: all 0.3s ease;
    overflow: hidden;
  }
  
  /* Hidden body when collapsed */
  #music-player.collapsed #player-body {
    display: none;
  }
  
  .player-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.3rem 1rem;
    background-color: var(--primary-color);
    color: white;
    font-weight: bold;
  }
  
  .player-buttons button {
    background: none;
    border: none;
    font-size: 1.1rem;
    cursor: pointer;
    margin-left: 0.5rem;
    color: white;
  }
  
  #player-body {
    padding: 0.5rem 1rem 1rem;
    display: block;
    background-color: var(--accent-color);
  }
  
  .player-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 0.5rem;
  }
  
  #yt-frame-container iframe {
    display: block;
    margin: 0 auto;
    width: 320px;
    height: 180px;
    border: none;
    border-radius: 8px;
  }
  #pet-window {
    position: fixed;                            /* float with scroll */
    bottom: 0.5rem;                             /* aligns with music player */
    left: 0.5rem;                               /* opposite side */
    width: 220px;
    background: linear-gradient(to bottom, #fff6fa, #ffeef3);
    border: 2px dashed var(--primary-color);
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    z-index: 1001;
    padding-top: 8px;
  }
  
  
  #pet-window .pet-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px;
    gap: 8px;
    text-align: center;
  }
  
  #pet-sprite {
    width: 96px;
    image-rendering: pixelated;
  }
  
  .pet-buttons button {
    margin: 2px;
    font-size: 12px;
  }
  
  .pet-bars {
    display: flex;
    flex-direction: column;
    gap: 4px;
    width: 80%;
    margin-top: 6px;
  }
  
  .bar-wrapper {
    width: 100%;
    height: 6px;
    background-color: #eee;
    border: 1px solid var(--border-color);
    border-radius: 3px;
    overflow: hidden;
  }
  
  .bar-fill {
    height: 100%;
    transition: width 0.3s ease;
  }
  
  .hunger {
    background-color: #f97b7b; /* reddish for hunger */
  }
  
  .boredom {
    background-color: #7bbdf9; /* blue for boredom */
  }