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1167 lines (1061 loc) · 38.8 KB
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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>CSS Layout Battle</title>
<style>
:root {
--ink: #171717;
--paper: #f7f4ed;
--panel: #fffdf7;
--line: #252525;
--muted: #6b665d;
--blue: #2459ff;
--red: #ee3f46;
--yellow: #ffca3a;
--green: #14a46c;
--violet: #7657ff;
--shadow: 6px 6px 0 #171717;
--radius: 8px;
font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
body {
margin: 0;
color: var(--ink);
background:
linear-gradient(90deg, rgba(23, 23, 23, .045) 1px, transparent 1px) 0 0 / 28px 28px,
linear-gradient(rgba(23, 23, 23, .045) 1px, transparent 1px) 0 0 / 28px 28px,
var(--paper);
}
button, textarea { font: inherit; }
.app {
min-height: 100vh;
display: grid;
grid-template-columns: 280px minmax(0, 1fr);
}
.sidebar {
border-right: 3px solid var(--line);
background: #fff8df;
padding: 20px;
position: sticky;
top: 0;
height: 100vh;
overflow: auto;
}
.brand {
display: grid;
gap: 12px;
padding-bottom: 18px;
border-bottom: 3px solid var(--line);
}
.logo-mark {
width: 58px;
height: 58px;
display: grid;
grid-template-columns: repeat(3, 1fr);
grid-template-rows: repeat(3, 1fr);
gap: 4px;
padding: 6px;
border: 3px solid var(--line);
background: var(--panel);
box-shadow: 4px 4px 0 var(--line);
}
.logo-mark span {
border: 2px solid var(--line);
background: var(--blue);
}
.logo-mark span:nth-child(2), .logo-mark span:nth-child(6) { background: var(--yellow); }
.logo-mark span:nth-child(4), .logo-mark span:nth-child(8) { background: var(--red); }
.logo-mark span:nth-child(5) { background: var(--green); }
h1 {
margin: 0;
font-family: Impact, Haettenschweiler, "Arial Narrow Bold", sans-serif;
font-size: clamp(2.2rem, 7vw, 4.9rem);
line-height: .84;
letter-spacing: 0;
text-transform: uppercase;
max-width: 11ch;
}
.sidebar h1 {
font-size: 2.25rem;
line-height: .88;
}
.tagline {
margin: 0;
color: var(--muted);
line-height: 1.4;
font-size: .95rem;
}
.progress-shell {
margin: 18px 0 14px;
border: 3px solid var(--line);
height: 18px;
background: var(--panel);
overflow: hidden;
}
.progress-bar {
height: 100%;
width: 0%;
background: repeating-linear-gradient(45deg, var(--green) 0 10px, #58d093 10px 20px);
transition: width .25s ease;
}
.level-list {
display: grid;
gap: 8px;
margin-top: 14px;
}
.level-button {
width: 100%;
display: grid;
grid-template-columns: 30px 1fr auto;
align-items: center;
gap: 8px;
min-height: 44px;
border: 2px solid var(--line);
border-radius: var(--radius);
color: var(--ink);
background: var(--panel);
cursor: pointer;
text-align: left;
padding: 8px;
}
.level-button:hover, .level-button:focus-visible {
outline: 3px solid var(--yellow);
outline-offset: 2px;
}
.level-button.active {
background: var(--blue);
color: white;
box-shadow: 3px 3px 0 var(--line);
}
.level-num {
width: 26px;
height: 26px;
display: grid;
place-items: center;
border: 2px solid currentColor;
border-radius: 50%;
font-weight: 800;
font-size: .8rem;
}
.level-title {
font-weight: 800;
font-size: .85rem;
line-height: 1.15;
}
.level-type {
font-size: .68rem;
font-weight: 900;
letter-spacing: 0;
text-transform: uppercase;
}
.main {
min-width: 0;
display: grid;
grid-template-rows: auto 1fr;
}
.topbar {
border-bottom: 3px solid var(--line);
background: var(--panel);
padding: 18px 24px;
display: flex;
align-items: center;
justify-content: space-between;
gap: 16px;
flex-wrap: wrap;
}
.chapter {
display: flex;
align-items: center;
gap: 10px;
font-weight: 900;
text-transform: uppercase;
}
.chapter-dot {
width: 15px;
height: 15px;
border: 2px solid var(--line);
background: var(--red);
transform: rotate(45deg);
}
.scoreline {
display: flex;
align-items: center;
gap: 10px;
color: var(--muted);
font-size: .9rem;
font-weight: 700;
}
.score-pill {
border: 2px solid var(--line);
background: var(--yellow);
color: var(--ink);
border-radius: 999px;
padding: 5px 10px;
font-weight: 900;
}
.workspace {
display: grid;
grid-template-columns: minmax(360px, 1fr) minmax(330px, 440px);
gap: 18px;
padding: 18px;
min-height: 0;
}
.battlefield {
min-width: 0;
display: grid;
grid-template-rows: auto minmax(320px, 1fr) auto;
gap: 14px;
}
.brief {
border: 3px solid var(--line);
background: var(--panel);
box-shadow: var(--shadow);
border-radius: var(--radius);
padding: 16px;
display: grid;
gap: 10px;
}
.brief-title {
display: flex;
align-items: center;
justify-content: space-between;
gap: 10px;
}
.brief h2 {
margin: 0;
font-size: 1.1rem;
line-height: 1.1;
}
.concept {
border: 2px solid var(--line);
border-radius: 999px;
background: #dff4ff;
padding: 5px 10px;
font-family: "Cascadia Mono", Consolas, monospace;
font-weight: 800;
font-size: .78rem;
white-space: nowrap;
}
.goal {
margin: 0;
color: var(--muted);
font-size: .96rem;
line-height: 1.35;
}
.values {
display: flex;
gap: 7px;
flex-wrap: wrap;
}
.chip {
border: 2px solid var(--line);
background: #fff;
border-radius: 999px;
padding: 4px 8px;
font-family: "Cascadia Mono", Consolas, monospace;
font-size: .74rem;
font-weight: 800;
}
.preview-grid {
display: grid;
grid-template-columns: repeat(2, minmax(0, 1fr));
gap: 14px;
min-height: 0;
}
.preview-card {
min-width: 0;
border: 3px solid var(--line);
background: var(--panel);
border-radius: var(--radius);
display: grid;
grid-template-rows: auto 1fr;
overflow: hidden;
}
.preview-head {
min-height: 44px;
display: flex;
align-items: center;
justify-content: space-between;
border-bottom: 3px solid var(--line);
padding: 9px 12px;
font-weight: 900;
text-transform: uppercase;
font-size: .82rem;
letter-spacing: 0;
}
.target-head { background: #e8eeff; }
.result-head { background: #fff1bf; }
.screen {
padding: 16px;
min-height: 300px;
display: grid;
place-items: center;
background:
linear-gradient(90deg, rgba(23, 23, 23, .08) 1px, transparent 1px) center / 22px 22px,
linear-gradient(rgba(23, 23, 23, .08) 1px, transparent 1px) center / 22px 22px,
#fafafa;
}
.arena {
width: min(100%, 360px);
min-height: 230px;
border: 3px dashed #555;
background: rgba(255, 255, 255, .72);
padding: 16px;
position: relative;
overflow: hidden;
}
.target-arena, .result-arena { transition: all .2s ease; }
.box, .card-part, .badge {
display: grid;
place-items: center;
border: 3px solid var(--line);
color: var(--ink);
font-weight: 1000;
box-shadow: 3px 3px 0 rgba(23, 23, 23, .22);
user-select: none;
}
.box {
width: 56px;
height: 56px;
border-radius: 7px;
background: var(--blue);
color: white;
}
.box:nth-child(2) { background: var(--red); }
.box:nth-child(3) { background: var(--yellow); color: var(--ink); }
.box:nth-child(4) { background: var(--green); color: white; }
.box:nth-child(5) { background: var(--violet); color: white; }
.box:nth-child(6) { background: #ff7a2f; color: white; }
.tall { height: 94px; }
.wide { width: 88px; }
.small { width: 44px; height: 44px; }
.grid-cell {
width: auto;
height: auto;
min-width: 0;
min-height: 0;
}
.hero-card {
border: 3px solid var(--line);
background: #fff;
box-shadow: 4px 4px 0 rgba(23, 23, 23, .24);
padding: 12px;
min-height: 0;
}
.card-part {
min-height: 38px;
border-radius: 6px;
font-size: .8rem;
box-shadow: none;
}
.card-media { background: var(--blue); color: #fff; min-height: 92px; }
.card-title { background: var(--yellow); }
.card-actions { background: #dff4ff; }
.badge { width: 38px; height: 38px; background: var(--red); color: white; border-radius: 50%; font-size: .8rem; }
.layout-area {
display: grid;
place-items: center;
border: 3px solid var(--line);
border-radius: 6px;
min-height: 48px;
font-weight: 1000;
text-transform: uppercase;
box-shadow: 3px 3px 0 rgba(23, 23, 23, .18);
}
.header { background: var(--blue); color: white; }
.sidebar { background: var(--yellow); }
.main { background: #dff4ff; min-height: 88px; }
.footer { background: var(--green); color: white; }
.status-row {
display: grid;
grid-template-columns: 1fr auto auto;
align-items: center;
gap: 10px;
}
.feedback {
min-height: 48px;
border: 3px solid var(--line);
background: var(--panel);
border-radius: var(--radius);
padding: 12px;
font-weight: 800;
line-height: 1.3;
}
.feedback.good { background: #dff7e8; }
.feedback.warn { background: #ffe6e3; }
.btn {
border: 3px solid var(--line);
background: var(--panel);
min-height: 44px;
border-radius: var(--radius);
padding: 8px 13px;
cursor: pointer;
font-weight: 1000;
box-shadow: 3px 3px 0 var(--line);
}
.btn:hover, .btn:focus-visible {
outline: 3px solid var(--blue);
outline-offset: 2px;
}
.btn.primary { background: var(--green); color: white; }
.btn.secondary { background: var(--yellow); }
.code-panel {
min-width: 0;
border: 3px solid var(--line);
background: #1f2023;
color: #f5f2e9;
border-radius: var(--radius);
box-shadow: var(--shadow);
display: grid;
grid-template-rows: auto minmax(260px, 1fr) auto auto;
overflow: hidden;
}
.code-head {
border-bottom: 3px solid #000;
background: #30323a;
padding: 12px;
display: flex;
align-items: center;
justify-content: space-between;
gap: 10px;
font-weight: 900;
text-transform: uppercase;
font-size: .82rem;
}
.lights {
display: flex;
gap: 6px;
}
.lights span {
width: 13px;
height: 13px;
border-radius: 50%;
border: 2px solid #000;
}
.lights span:nth-child(1) { background: var(--red); }
.lights span:nth-child(2) { background: var(--yellow); }
.lights span:nth-child(3) { background: var(--green); }
textarea {
width: 100%;
height: 100%;
resize: none;
border: 0;
outline: 0;
color: #f8f3df;
background:
linear-gradient(90deg, #292b32 0 48px, transparent 48px),
#202126;
padding: 16px 16px 16px 64px;
font-family: "Cascadia Mono", Consolas, "Liberation Mono", monospace;
font-size: 15px;
line-height: 1.55;
tab-size: 2;
caret-color: var(--yellow);
}
.code-tools {
border-top: 3px solid #000;
display: grid;
grid-template-columns: 1fr 1fr;
gap: 10px;
padding: 12px;
background: #30323a;
}
.hint-panel {
border-top: 3px solid #000;
background: #25262c;
padding: 12px;
min-height: 88px;
color: #d9d5cc;
line-height: 1.35;
font-size: .92rem;
}
.hint-panel code {
color: #fff1a6;
font-family: "Cascadia Mono", Consolas, monospace;
font-weight: 800;
}
.complete-dialog {
border: 3px solid var(--line);
border-radius: var(--radius);
box-shadow: var(--shadow);
background: var(--panel);
color: var(--ink);
width: min(540px, calc(100vw - 28px));
padding: 0;
}
.complete-dialog::backdrop {
background: rgba(23, 23, 23, .55);
}
.modal-head {
border-bottom: 3px solid var(--line);
background: var(--green);
color: white;
padding: 14px 16px;
font-weight: 1000;
text-transform: uppercase;
}
.modal-body {
padding: 16px;
display: grid;
gap: 14px;
}
.why {
margin: 0;
font-size: 1rem;
line-height: 1.45;
}
.modal-actions {
display: flex;
justify-content: flex-end;
gap: 10px;
flex-wrap: wrap;
}
@media (max-width: 1050px) {
.app { grid-template-columns: 1fr; }
.sidebar {
position: static;
height: auto;
border-right: 0;
border-bottom: 3px solid var(--line);
}
.brand {
grid-template-columns: auto 1fr;
align-items: center;
}
.brand .tagline { grid-column: 1 / -1; }
.level-list {
grid-template-columns: repeat(3, minmax(0, 1fr));
}
}
@media (max-width: 860px) {
.workspace { grid-template-columns: 1fr; }
.code-panel { min-height: 520px; }
}
@media (max-width: 620px) {
.topbar, .workspace, .sidebar { padding: 12px; }
.level-list { grid-template-columns: 1fr 1fr; }
.preview-grid { grid-template-columns: 1fr; }
.status-row { grid-template-columns: 1fr; }
.brief-title { align-items: flex-start; flex-direction: column; }
.code-tools { grid-template-columns: 1fr; }
textarea { font-size: 14px; padding-left: 56px; }
}
@media (prefers-reduced-motion: reduce) {
*, *::before, *::after {
animation-duration: .01ms !important;
animation-iteration-count: 1 !important;
scroll-behavior: auto !important;
transition-duration: .01ms !important;
}
}
</style>
</head>
<body>
<div class="app">
<aside class="sidebar">
<div class="brand">
<div class="logo-mark" aria-hidden="true">
<span></span><span></span><span></span>
<span></span><span></span><span></span>
<span></span><span></span><span></span>
</div>
<div>
<h1>CSS Layout Battle</h1>
</div>
<p class="tagline">Match the target by writing layout CSS. Short hints, immediate feedback, no lectures.</p>
</div>
<div class="progress-shell" aria-label="Game progress">
<div class="progress-bar" id="progressBar"></div>
</div>
<div class="scoreline">
<span class="score-pill" id="scorePill">0 / 12</span>
<span>levels cleared</span>
</div>
<nav class="level-list" id="levelList" aria-label="Levels"></nav>
</aside>
<main class="main">
<header class="topbar">
<div class="chapter">
<span class="chapter-dot" aria-hidden="true"></span>
<span id="chapterLabel">Flexbox Battle</span>
</div>
<div class="scoreline">
<span id="levelCounter">Level 1 of 12</span>
<span class="score-pill" id="sectionPill">Flexbox</span>
</div>
</header>
<section class="workspace">
<div class="battlefield">
<section class="brief" aria-labelledby="levelName">
<div class="brief-title">
<h2 id="levelName">Display Flex</h2>
<span class="concept" id="conceptLabel">display: flex</span>
</div>
<p class="goal" id="goalText">Turn the container into a flex container.</p>
<div class="values" id="valuesList"></div>
</section>
<section class="preview-grid" aria-label="Layout previews">
<article class="preview-card">
<div class="preview-head target-head">
<span>Target</span>
<span aria-hidden="true">T</span>
</div>
<div class="screen">
<div class="arena target-arena" id="targetArena"></div>
</div>
</article>
<article class="preview-card">
<div class="preview-head result-head">
<span>Your result</span>
<span aria-hidden="true">R</span>
</div>
<div class="screen">
<div class="arena result-arena" id="resultArena"></div>
</div>
</article>
</section>
<div class="status-row">
<div class="feedback" id="feedback">Write CSS, then run the check.</div>
<button class="btn secondary" id="resetBtn" type="button">Reset</button>
<button class="btn primary" id="checkBtn" type="button">Check</button>
</div>
</div>
<section class="code-panel" aria-label="CSS editor">
<div class="code-head">
<span>layout.css</span>
<span class="lights" aria-hidden="true"><span></span><span></span><span></span></span>
</div>
<textarea id="cssInput" spellcheck="false" aria-label="CSS input"></textarea>
<div class="code-tools">
<button class="btn secondary" id="hintBtn" type="button">Hint</button>
<button class="btn" id="solutionBtn" type="button">Show Solution</button>
</div>
<div class="hint-panel" id="hintPanel">Hints appear here when you need a nudge.</div>
</section>
</section>
</main>
</div>
<dialog class="complete-dialog" id="completeDialog">
<div class="modal-head" id="modalTitle">Level complete</div>
<div class="modal-body">
<p class="why" id="whyText"></p>
<div class="modal-actions">
<button class="btn secondary" id="stayBtn" type="button">Stay</button>
<button class="btn primary" id="nextBtn" type="button">Next Level</button>
</div>
</div>
</dialog>
<script>
const levels = [
{
title: "Display Flex",
section: "Flexbox",
chapter: "Flexbox Battle",
goal: "Turn the container into a flex container.",
concept: "display: flex",
values: ["display", "flex"],
markup: "basic3",
starter: ".container {\n \n}",
solution: ".container {\n display: flex;\n}",
hint: "A flex battle starts on the parent. Put <code>display: flex</code> on <code>.container</code>.",
why: "Flexbox makes direct children line up on a main axis. Without it, block items stack vertically.",
check: styles => styles.container.display === "flex"
},
{
title: "Flex Direction",
section: "Flexbox",
chapter: "Flexbox Battle",
goal: "Change the direction of the items.",
concept: "flex-direction",
values: ["row", "column", "row-reverse", "column-reverse"],
markup: "basic3",
starter: ".container {\n display: flex;\n \n}",
solution: ".container {\n display: flex;\n flex-direction: column;\n}",
hint: "The target stacks top to bottom. Use <code>flex-direction: column</code>.",
why: "The main axis is horizontal by default. <code>flex-direction: column</code> rotates it vertically.",
check: styles => styles.container.display === "flex" && styles.container.flexDirection === "column"
},
{
title: "Justify Content",
section: "Flexbox",
chapter: "Flexbox Battle",
goal: "Move the items along the main axis.",
concept: "justify-content",
values: ["flex-start", "center", "flex-end", "space-between", "space-around", "space-evenly"],
markup: "basic3",
starter: ".container {\n display: flex;\n \n}",
solution: ".container {\n display: flex;\n justify-content: space-between;\n}",
hint: "The first and last items touch opposite sides. Try <code>justify-content: space-between</code>.",
why: "<code>justify-content</code> distributes children along the main axis after their sizes are known.",
check: styles => styles.container.display === "flex" && styles.container.justifyContent === "space-between"
},
{
title: "Align Items",
section: "Flexbox",
chapter: "Flexbox Battle",
goal: "Align items across the cross axis.",
concept: "align-items",
values: ["flex-start", "center", "flex-end", "stretch"],
markup: "mixed3",
starter: ".container {\n display: flex;\n \n}",
solution: ".container {\n display: flex;\n align-items: center;\n}",
hint: "The items sit halfway down the container. Use <code>align-items: center</code>.",
why: "In a row flexbox, the cross axis is vertical. <code>align-items</code> controls that axis.",
check: styles => styles.container.display === "flex" && styles.container.alignItems === "center"
},
{
title: "Gap",
section: "Flexbox",
chapter: "Flexbox Battle",
goal: "Create equal spacing between items.",
concept: "gap",
values: ["gap", "row-gap", "column-gap"],
markup: "basic3",
starter: ".container {\n display: flex;\n \n}",
solution: ".container {\n display: flex;\n gap: 24px;\n}",
hint: "Do not push each item with margins. Put <code>gap: 24px</code> on the container.",
why: "<code>gap</code> belongs to the layout parent and creates consistent spacing between children.",
check: styles => styles.container.display === "flex" && px(styles.container.gap) === 24
},
{
title: "Flex Wrap",
section: "Flexbox",
chapter: "Flexbox Battle",
goal: "Let crowded items flow onto a new line.",
concept: "flex-wrap",
values: ["nowrap", "wrap", "wrap-reverse"],
markup: "sixWide",
starter: ".container {\n display: flex;\n gap: 12px;\n \n}",
solution: ".container {\n display: flex;\n gap: 12px;\n flex-wrap: wrap;\n}",
hint: "The target keeps the row tidy by allowing another line. Add <code>flex-wrap: wrap</code>.",
why: "Flex items shrink or overflow by default. Wrapping lets them create new flex lines when space runs out.",
check: styles => styles.container.display === "flex" && styles.container.flexWrap === "wrap"
},
{
title: "Display Grid",
section: "Grid",
chapter: "Grid Battle",
goal: "Turn the container into a grid container.",
concept: "display: grid",
values: ["display", "grid"],
markup: "basic4",
starter: ".container {\n \n}",
solution: ".container {\n display: grid;\n}",
hint: "Grid also starts on the parent. Put <code>display: grid</code> on <code>.container</code>.",
why: "Grid creates rows and columns for direct children. The browser places items into cells automatically.",
check: styles => styles.container.display === "grid"
},
{
title: "Grid Columns",
section: "Grid",
chapter: "Grid Battle",
goal: "Build three equal columns.",
concept: "grid-template-columns",
values: ["1fr", "repeat()", "grid-template-columns"],
markup: "basic6Grid",
starter: ".container {\n display: grid;\n gap: 12px;\n \n}",
solution: ".container {\n display: grid;\n gap: 12px;\n grid-template-columns: repeat(3, 1fr);\n}",
hint: "Three equal tracks can be written as <code>repeat(3, 1fr)</code>.",
why: "<code>fr</code> divides available space into flexible fractions across the grid.",
check: styles => styles.container.display === "grid" && hasTracks(styles.container.gridTemplateColumns, 3)
},
{
title: "Grid Gap",
section: "Grid",
chapter: "Grid Battle",
goal: "Create consistent spacing between rows and columns.",
concept: "gap",
values: ["gap", "row-gap", "column-gap"],
markup: "basic6Grid",
starter: ".container {\n display: grid;\n grid-template-columns: repeat(3, 1fr);\n \n}",
solution: ".container {\n display: grid;\n grid-template-columns: repeat(3, 1fr);\n gap: 16px;\n}",
hint: "Grid uses the same spacing property as flexbox. Add <code>gap: 16px</code> to the container.",
why: "<code>gap</code> creates row and column spacing from the grid parent, so every track keeps the same rhythm.",
check: styles => styles.container.display === "grid" && px(styles.container.gap) === 16
},
{
title: "Grid Column",
section: "Grid",
chapter: "Grid Battle",
goal: "Make the first item span two columns.",
concept: "grid-column",
values: ["span 2", "grid-column"],
markup: "basic5Grid",
starter: ".container {\n display: grid;\n grid-template-columns: repeat(3, 1fr);\n gap: 12px;\n}\n\n.item-1 {\n \n}",
solution: ".container {\n display: grid;\n grid-template-columns: repeat(3, 1fr);\n gap: 12px;\n}\n\n.item-1 {\n grid-column: span 2;\n}",
hint: "Target only changes tile 1. Use <code>.item-1 { grid-column: span 2; }</code>.",
why: "Grid items can claim multiple tracks. This is how dashboards and editorial layouts get larger feature blocks.",
check: styles => styles.container.display === "grid" && /span\s+2|auto\s*\/\s*span\s+2/.test(styles.items[0].gridColumn)
},
{
title: "Grid Template Areas",
section: "Grid",
chapter: "Grid Battle",
goal: "Create a page layout with header, sidebar, main, and footer areas.",
concept: "grid-template-areas",
values: ["grid-template-areas", "grid-area", "header", "sidebar", "main", "footer"],
markup: "areas",
starter: ".container {\n display: grid;\n gap: 12px;\n \n}\n\n.header { }\n.sidebar { }\n.main { }\n.footer { }",
solution: ".container {\n display: grid;\n grid-template-columns: 90px 1fr;\n grid-template-areas:\n \"header header\"\n \"sidebar main\"\n \"footer footer\";\n gap: 12px;\n}\n\n.header { grid-area: header; }\n.sidebar { grid-area: sidebar; }\n.main { grid-area: main; }\n.footer { grid-area: footer; }",
hint: "Name each child with <code>grid-area</code>, then draw the layout using quoted rows in <code>grid-template-areas</code>.",
why: "<code>grid-template-areas</code> lets you describe page regions by name, which makes common layouts easier to read.",
check: styles => styles.container.display === "grid" && styles.container.gridTemplateAreas.includes("header header") && styles.header.gridArea.includes("header") && styles.sidebar.gridArea.includes("sidebar") && styles.main.gridArea.includes("main") && styles.footer.gridArea.includes("footer")
},
{
title: "Flexbox vs Grid",
section: "Hybrid",
chapter: "Flexbox vs Grid",
goal: "Use grid for the card layout and flexbox for the action row.",
concept: "grid + flex",
values: ["display: grid", "display: flex", "gap", "justify-content"],
markup: "hybrid",
starter: ".container {\n \n}\n\n.actions {\n \n}",
solution: ".container {\n display: grid;\n grid-template-columns: 1fr 80px;\n gap: 12px;\n}\n\n.actions {\n display: flex;\n justify-content: space-between;\n gap: 8px;\n}",
hint: "Use <code>grid</code> on <code>.container</code> for the big regions, then <code>flex</code> on <code>.actions</code> for the small row.",
why: "Grid is best for two-dimensional page regions. Flexbox is best for one-dimensional groups like button rows.",
check: styles => styles.container.display === "grid" && styles.container.gridTemplateColumns.includes("80px") && styles.actions.display === "flex" && styles.actions.justifyContent === "space-between"
}
];
const allowedProperties = new Set([
"display", "flex-direction", "justify-content", "align-items", "align-content", "flex-wrap",
"gap", "row-gap", "column-gap", "grid-template-columns", "grid-template-rows", "grid-column",
"grid-row", "grid-template-areas", "grid-area", "place-items", "justify-items", "place-content",
"align-self", "justify-self"
]);
const targetArena = document.querySelector("#targetArena");
const resultArena = document.querySelector("#resultArena");
const cssInput = document.querySelector("#cssInput");
const feedback = document.querySelector("#feedback");
const hintPanel = document.querySelector("#hintPanel");
const levelList = document.querySelector("#levelList");
const progressBar = document.querySelector("#progressBar");
const scorePill = document.querySelector("#scorePill");
const levelCounter = document.querySelector("#levelCounter");
const sectionPill = document.querySelector("#sectionPill");
const chapterLabel = document.querySelector("#chapterLabel");
const levelName = document.querySelector("#levelName");
const conceptLabel = document.querySelector("#conceptLabel");
const goalText = document.querySelector("#goalText");
const valuesList = document.querySelector("#valuesList");
const dialog = document.querySelector("#completeDialog");
const whyText = document.querySelector("#whyText");
const modalTitle = document.querySelector("#modalTitle");
const stayBtn = document.querySelector("#stayBtn");
const nextBtn = document.querySelector("#nextBtn");
let current = 0;
const cleared = new Set(JSON.parse(localStorage.getItem("layoutBattleCleared") || "[]"));
function makeMarkup(type) {
const box = (n, extra = "") => `<div class="box item item-${n} ${extra}">${n}</div>`;
if (type === "mixed3") return box(1, "small") + box(2, "tall") + box(3, "wide");
if (type === "sixWide") return [1, 2, 3, 4, 5, 6].map(n => box(n, "wide")).join("");
if (type === "basic4") return [1, 2, 3, 4].map(n => box(n)).join("");
if (type === "basic6Grid") return [1, 2, 3, 4, 5, 6].map(n => box(n, "grid-cell")).join("");
if (type === "basic4Grid") return [1, 2, 3, 4].map(n => box(n, "grid-cell")).join("");
if (type === "basic5Grid") return [1, 2, 3, 4, 5].map(n => box(n, "grid-cell")).join("");
if (type === "smallGrid") return [1, 2, 3, 4, 5, 6].map(n => box(n, "small grid-cell")).join("");
if (type === "areas") {
return `
<div class="layout-area header">Header</div>
<div class="layout-area sidebar">Sidebar</div>
<div class="layout-area main">Main</div>
<div class="layout-area footer">Footer</div>
`;
}
if (type === "hybrid") {
return `
<div class="hero-card">
<div class="card-part card-media">media</div>
<div class="card-part card-title">title</div>
<div class="card-part actions">
<span class="badge">A</span>
<span class="badge">B</span>
</div>
</div>
<div class="box item item-2 tall">side</div>
`;
}
return [1, 2, 3].map(n => box(n)).join("");
}
function renderLevelButtons() {
levelList.innerHTML = levels.map((level, index) => `
<button class="level-button ${index === current ? "active" : ""}" type="button" data-index="${index}" aria-label="Level ${index + 1}: ${level.title}">
<span class="level-num">${cleared.has(index) ? "*" : index + 1}</span>
<span class="level-title">${level.title}</span>
<span class="level-type">${level.section}</span>
</button>
`).join("");
}
function updateProgress() {
const count = cleared.size;
progressBar.style.width = `${(count / levels.length) * 100}%`;
scorePill.textContent = `${count} / ${levels.length}`;
}
function loadLevel(index) {
current = index;
const level = levels[current];
levelName.textContent = level.title;
conceptLabel.textContent = level.concept;
goalText.textContent = level.goal;
chapterLabel.textContent = level.chapter;
sectionPill.textContent = level.section;
levelCounter.textContent = `Level ${current + 1} of ${levels.length}`;
valuesList.innerHTML = level.values.map(value => `<span class="chip">${value}</span>`).join("");
cssInput.value = level.starter;
hintPanel.textContent = "Hints appear here when you need a nudge.";
feedback.className = "feedback";