Collapsible Section List - Free UI Component Template

Text Color #1e293b

Accent Color #4f46e5

Background Color #ffffff

Font Size (rem) 1

Max Width (px) 400

Collapsible Section List

Grouped content list with collapsible section headers. Ideal for complex sidebars or categorized settings.

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Collapsible Section List</title>
    <link rel="preconnect" href="https://fonts.googleapis.com">
    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
    <link href="https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap" rel="stylesheet">
    <style>
        :root {
            --text-color: {{textColor}};
            --accent-color: {{accentColor}};
            --bg-color: {{bgColor}};
            --font-size: {{fontSize}}rem;
            --list-width: {{listWidth}}px;
        }

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

body {
            font-family: 'Plus Jakarta Sans', sans-serif;
            background: #f1f5f9;
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 100vh;
            padding: 2rem;
            color: var(--text-color);
        }

.collapsible-list-container {
            width: 100%;
            max-width: var(--list-width);
            background: var(--bg-color);
            border-radius: 20px;
            padding: 1.5rem;
            box-shadow: 0 10px 25px rgba(0,0,0,0.05);
            font-size: var(--font-size);
        }

.section { margin-bottom: 1rem; }
        .section:last-child { margin-bottom: 0; }

.section-header {
            width: 100%;
            padding: 0.75rem 0.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: none;
            border: none;
            cursor: pointer;
            color: #94a3b8;
            font-size: 0.75em;
            font-weight: 800;
            text-transform: uppercase;
            letter-spacing: 0.1em;
            transition: color 0.2s ease;
            font-family: inherit;
        }
        .section-header:hover { color: var(--accent-color); }

.section-icon {
            width: 14px;
            height: 14px;
            fill: none;
            stroke: currentColor;
            stroke-width: 3;
            transition: transform 0.3s ease;
        }
        .section.collapsed .section-icon { transform: rotate(-90deg); }

.section-content {
            list-style: none;
            max-height: 500px; /* arbitrary */
            overflow: hidden;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            opacity: 1;
            margin-top: 0.5rem;
        }
        .section.collapsed .section-content {
            max-height: 0;
            opacity: 0;
            margin-top: 0;
            pointer-events: none;
        }

.item {
            padding: 0.85rem 1rem;
            border-radius: 12px;
            display: flex;
            align-items: center;
            gap: 1rem;
            cursor: pointer;
            transition: background 0.2s ease;
            font-weight: 600;
            color: var(--text-color);
        }
        .item:hover { background: #f8fafc; color: var(--accent-color); }

.item-count {
            margin-left: auto;
            font-size: 0.85em;
            opacity: 0.4;
        }

</style>
</head>
<body style="--accent-rgb: 79, 70, 229;">

<div class="collapsible-list-container">
        <div class="section">
            <button class="section-header">
                <span>Personal</span>
                <svg class="section-icon" viewBox="0 0 24 24"><path d="M6 9l6 6 6-6"/></svg>
            </button>
            <ul class="section-content">
                <li class="item">
                    <span>ð </span>
                    <span>Home</span>
                    <span class="item-count">12</span>
                </li>
                <li class="item">
                    <span>ð</span>
                    <span>Automotive</span>
                    <span class="item-count">3</span>
                </li>
            </ul>
        </div>

<div class="section">
            <button class="section-header">
                <span>Work</span>
                <svg class="section-icon" viewBox="0 0 24 24"><path d="M6 9l6 6 6-6"/></svg>
            </button>
            <ul class="section-content">
                <li class="item">
                    <span>ð</span>
                    <span>Schedule</span>
                    <span class="item-count">5</span>
                </li>
                <li class="item">
                    <span>ð§</span>
                    <span>Inbound Tasks</span>
                    <span class="item-count">24</span>
                </li>
                <li class="item">
                    <span>ð</span>
                    <span>Sprint Projects</span>
                    <span class="item-count">7</span>
                </li>
            </ul>
        </div>

<div class="section collapsed">
            <button class="section-header">
                <span>Archives</span>
                <svg class="section-icon" viewBox="0 0 24 24"><path d="M6 9l6 6 6-6"/></svg>
            </button>
            <ul class="section-content">
                <li class="item">
                    <span>ð</span>
                    <span>Full History 2023</span>
                </li>
                <li class="item">
                    <span>ð</span>
                    <span>Project Zeta</span>
                </li>
            </ul>
        </div>
    </div>