:root {
    /* Zen Pastel Palette */
    --pastel-green: #B2D8B2;
    --pastel-blue: #B2D8D8;
    --pastel-pink: #D8B2D8;
    --pastel-purple: #C2B2D8;
    --pastel-yellow: #D8D8B2;
    --dark-green: #3D5A3D;
    --text-color: #555555;
    --bg-color: #F7F7F7;
    --hover-bg: #E0E0E0;
    --button-color: var(--pastel-green); /* Single color for all buttons */
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    margin: 0;
    padding: 20px;
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: absolute;
    top: -50px;
    left: -50px;
    width: 200px;
    height: 200px;
    background-color: var(--pastel-blue);
    border-radius: 50%;
    opacity: 0.3;
    animation: float 10s ease-in-out infinite;
    z-index: -1;
}

body::after {
    content: '';
    position: absolute;
    bottom: -50px;
    right: -50px;
    width: 250px;
    height: 250px;
    background-color: var(--pastel-pink);
    border-radius: 50%;
    opacity: 0.2;
    animation: float 12s ease-in-out infinite reverse;
    z-index: -1;
}

@keyframes float {
    0% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(10deg); }
    100% { transform: translateY(0) rotate(0deg); }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.header {
    text-align: center;
    margin-bottom: 50px;
}

.zen-title {
    font-size: 3rem;
    font-weight: 300;
    color: var(--dark-green);
    letter-spacing: 2px;
    margin: 0;
}

.zen-subtitle {
    font-style: italic;
    color: var(--text-color);
}

.zen-section {
    margin-bottom: 50px;
    position: relative;
    padding: 30px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 15px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.05);
}

.zen-section::before {
    content: '';
    position: absolute;
    top: 15px;
    right: 15px;
    width: 50px;
    height: 50px;
    border: 2px solid var(--dark-green);
    border-radius: 50%;
    opacity: 0.1;
}

.section-title {
    font-size: 2rem;
    font-weight: 400;
    color: var(--dark-green);
    border-bottom: 2px solid var(--pastel-green);
    padding-bottom: 10px;
    margin-bottom: 30px;
}

.filter-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
}

.filter-button {
    background-color: var(--pastel-purple);
    color: white;
    padding: 8px 15px;
    border-radius: 20px;
    border: none;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.2s ease;
    font-size: 0.9rem;
    outline: none;
}

.filter-button.active {
    background-color: var(--dark-green);
    transform: scale(1.05);
}

.filter-button:hover {
    background-color: var(--dark-green);
}

.button-grid {
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: 10px;
}

.interactive-button {
    background-color: var(--button-color);
    color: white;
    font-weight: 600;
    padding: 15px 5px;
    text-align: center;
    text-decoration: none;
    border-radius: 8px;
    border: none;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.3s ease;
    cursor: pointer;
    font-size: 1rem;
    outline: none;
}

.interactive-button:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 12px rgba(0, 0, 0, 0.15);
}

/* Ripple effect on click/touch */
.interactive-button:active {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.hidden {
    display: none;
    opacity: 0;
}