:root {
    --primary: #0b5ed7;
    --secondary: #198754;
    --bg: #f4f6f9;
    --light: #ffffff;
    --border: #dee2e6;
}

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

body {
    font-family: "Segoe UI", Tahoma, Arial, sans-serif;
    background: var(--bg);
    color: #333;
}

/* ===== Top Navbar ===== */
.topbar {
    height: 60px;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    padding: 0 25px;

    /* FIX */
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo {
    font-size: 20px;
    font-weight: bold;
    background: #fff;
    color: var(--primary);
    padding: 4px 10px;
    border-radius: 4px;
}

.title {
    font-size: 16px;
    font-weight: 500;
}

/* ===== Layout ===== */
.layout {
    display: flex;
    min-height: calc(100vh - 60px);
}

/* ===== Sidebar ===== */
.sidebar {
    width: 260px;
    background: var(--light);
    border-right: 1px solid var(--border);
    padding: 20px;
    overflow-y: auto;

    /* Sticky Sidebar */
    position: sticky;
    top: 60px;
    height: calc(100vh - 60px);
}

.sidebar h3 {
    margin-bottom: 15px;
    color: var(--primary);
}

.sidebar nav a {
    display: block;
    padding: 10px 12px;
    margin-bottom: 6px;
    text-decoration: none;
    color: #333;
    border-radius: 6px;
    font-size: 14px;
    transition: 0.2s ease;
}

.sidebar nav a:hover {
    background: var(--primary);
    color: #fff;
}

.sidebar a.active {
    background: var(--primary);
    color: #fff;
    font-weight: 600;
}

/* ===== Content ===== */
.content {
    flex: 1;
    padding: 30px 40px;
    overflow-y: auto;
    background: #fff;
}

.content section {
    margin-bottom: 50px;
}

/* ===== Headings ===== */
h2 {
    margin-bottom: 14px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--border);
    color: var(--primary);
    font-weight: 600;
}

h3 {
    margin-bottom: 6px;
    color: var(--secondary);
}

/* ===== Lists ===== */
ul {
    padding-left: 20px;
}

li {
    margin-bottom: 6px;
}

/* ===== Note Box ===== */
.note-box {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
    padding: 16px 18px;
    border-radius: 6px;
}

/* ===== Screenshot Box ===== */
.screenshot {
    margin-top: 20px;
    padding: 20px;
    border: 1px solid var(--border);
    background: #f8f9fa;
    border-radius: 8px;
    text-align: center; 
    font-size: 14px;
    color: #6c757d;
    display: flex;
    flex-direction: column; 
    align-items: center;
}

.screenshot-title {
    font-weight: 600;
    font-size: 20px;
    color: var(--primary);
    margin-bottom: 12px; 
    display: block;
    border-bottom: 2px solid var(--primary);
    padding-bottom: 3px;
    text-align: center; 
}

.screenshot img {
    width: 100%;
    max-width: 650px;
    border-radius: 8px;
    border: 1px solid #dee2e6;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

/* Screenshot Image */
.screenshot img {
    width: 100%;
    max-width: 650px;
    margin-top: 12px;
    border-radius: 8px;
    border: 1px solid #dee2e6;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    transition: 0.3s;
    cursor: pointer;
}

.screenshot img:hover {
    transform: scale(1.03);
}

/* ===== Code Block ===== */
pre {
    background: #212529;
    color: #f8f9fa;
    padding: 12px 15px;
    border-radius: 6px;
    overflow-x: auto;
    margin-top: 10px;
    font-size: 13px;
}

/* ===== Responsive ===== */
@media (max-width: 992px) {
    .layout {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        top: 0;
    }

    .content {
        padding: 20px;
    }
}