body {
	padding: 24px 16px 80px;
}

.autosave-bar {
	margin-bottom: 18px;
}

.wrap {
	max-width: 860px;
	margin: 0 auto;
}

h1 {
	font-size: 20px;
	font-weight: 500;
	margin-bottom: 4px;
}

.subtitle {
	font-size: 13px;
	color: #888;
	margin-bottom: 20px;
}

/* Tabs */
.tabs {
	display: flex;
	gap: 4px;
	background: #fff;
	border: 0.5px solid rgba(0, 0, 0, 0.1);
	border-radius: 12px;
	padding: 4px;
	margin-bottom: 18px;
	overflow-x: auto;
	flex-wrap: wrap;
}

html.dark .tabs {
	background: #252522;
	border-color: rgba(255, 255, 255, 0.1);
}

.tab-btn {
	flex-shrink: 0;
	padding: 6px 12px;
	border-radius: 7px;
	border: none;
	cursor: pointer;
	font-size: 12px;
	font-weight: 500;
	background: transparent;
	color: #888;
	transition:
		background 0.15s,
		color 0.15s;
}

.tab-btn.active {
	background: rgba(37, 99, 235, 0.12);
	color: #2563eb;
}

html.dark .tab-btn.active {
	background: rgba(96, 165, 250, 0.15);
	color: #60a5fa;
}

/* Section panels */
.section {
	display: none;
}

.section.active {
	display: block;
}

/* Task card */
.task-card {
	background: #fff;
	border: 0.5px solid rgba(0, 0, 0, 0.1);
	border-radius: 12px;
	margin-bottom: 14px;
	overflow: hidden;
	border-left: 3px solid #888;
}

html.dark .task-card {
	background: #252522;
	border-color: rgba(255, 255, 255, 0.1);
}

.task-header {
	padding: 14px 16px;
}

.task-number {
	font-size: 11px;
	font-weight: 500;
	text-transform: uppercase;
	letter-spacing: 0.7px;
	color: #888;
	margin-bottom: 6px;
}

.task-title {
	font-size: 15px;
	font-weight: 500;
	margin-bottom: 8px;
	line-height: 1.4;
}

.task-scenario {
	font-size: 13px;
	color: #555;
	line-height: 1.6;
}

html.dark .task-scenario {
	color: #aaa;
}

.task-meta {
	display: flex;
	gap: 8px;
	margin-top: 10px;
	flex-wrap: wrap;
}

.pill {
	font-size: 11px;
	padding: 3px 9px;
	border-radius: 99px;
	font-weight: 500;
	background: rgba(0, 0, 0, 0.06);
	color: #555;
}

html.dark .pill {
	background: rgba(255, 255, 255, 0.08);
	color: #aaa;
}

.pill.hard {
	background: rgba(239, 68, 68, 0.1);
	color: #dc2626;
}

.pill.medium {
	background: rgba(245, 158, 11, 0.1);
	color: #d97706;
}

.pill.easy {
	background: rgba(34, 197, 94, 0.1);
	color: #16a34a;
}

/* Hint toggle */
.hint-toggle {
	display: flex;
	align-items: center;
	gap: 8px;
	padding: 10px 16px;
	cursor: pointer;
	user-select: none;
	border-top: 0.5px solid rgba(0, 0, 0, 0.08);
	font-size: 13px;
	color: #2563eb;
	background: rgba(37, 99, 235, 0.04);
	transition: background 0.15s;
}

.hint-toggle:hover {
	background: rgba(37, 99, 235, 0.08);
}

html.dark .hint-toggle {
	border-color: rgba(255, 255, 255, 0.08);
	color: #60a5fa;
	background: rgba(96, 165, 250, 0.06);
}

html.dark .hint-toggle:hover {
	background: rgba(96, 165, 250, 0.1);
}

.hint-arrow {
	font-size: 10px;
	transition: transform 0.2s;
	display: inline-block;
}

.hint-toggle.open .hint-arrow {
	transform: rotate(90deg);
}

/* Solution box */
.solution {
	display: none;
	padding: 16px;
	border-top: 0.5px solid rgba(0, 0, 0, 0.08);
}

.solution.open {
	display: block;
}

html.dark .solution {
	border-color: rgba(255, 255, 255, 0.08);
}

.sol-step {
	margin-bottom: 16px;
}

.sol-step:last-child {
	margin-bottom: 0;
}

.step-label {
	font-size: 11px;
	font-weight: 500;
	text-transform: uppercase;
	letter-spacing: 0.7px;
	color: #888;
	margin-bottom: 6px;
}

.step-desc {
	font-size: 13px;
	color: #555;
	line-height: 1.6;
	margin-bottom: 8px;
}

html.dark .step-desc {
	color: #aaa;
}

.code-block {
	background: #f0f4ff;
	border: 0.5px solid rgba(0, 0, 0, 0.08);
	border-radius: 8px;
	padding: 10px 12px;
	cursor: pointer;
	font-family: SFMono-Regular, Consolas, monospace;
	font-size: 12px;
	color: #1d4ed8;
	white-space: pre-wrap;
	word-break: break-all;
	line-height: 1.6;
	position: relative;
	transition: background 0.1s;
}

.code-block:hover {
	background: #e8effe;
}

html.dark .code-block {
	background: #1e2030;
	border-color: rgba(255, 255, 255, 0.08);
	color: #93c5fd;
}

html.dark .code-block:hover {
	background: #252840;
}

.copy-hint {
	position: absolute;
	top: 6px;
	right: 8px;
	font-size: 10px;
	color: #888;
	font-family: -apple-system, sans-serif;
}

.code-block + .code-block {
	margin-top: 6px;
}

.note {
	font-size: 12px;
	color: #888;
	background: rgba(245, 158, 11, 0.08);
	border: 0.5px solid rgba(245, 158, 11, 0.25);
	border-radius: 8px;
	padding: 8px 12px;
	margin-top: 8px;
	line-height: 1.5;
}

.expected {
	font-size: 12px;
	color: #16a34a;
	background: rgba(34, 197, 94, 0.07);
	border: 0.5px solid rgba(34, 197, 94, 0.2);
	border-radius: 8px;
	padding: 8px 12px;
	margin-top: 8px;
	line-height: 1.5;
}

/* Progress */
.progress-bar-wrap {
	background: #e5e5e0;
	border-radius: 99px;
	height: 6px;
	overflow: hidden;
	margin-bottom: 6px;
}

html.dark .progress-bar-wrap {
	background: #333;
}

.progress-bar {
	height: 100%;
	border-radius: 99px;
	transition: width 0.3s;
	background: #2563eb;
}

.progress-label {
	font-size: 12px;
	color: #888;
	margin-bottom: 18px;
}

.done-btn {
	margin-top: 14px;
	padding: 7px 16px;
	border-radius: 8px;
	border: 0.5px solid rgba(0, 0, 0, 0.15);
	background: transparent;
	cursor: pointer;
	font-size: 12px;
	font-weight: 500;
	color: #555;
	transition: all 0.15s;
}

.done-btn:hover {
	background: rgba(34, 197, 94, 0.08);
	color: #16a34a;
	border-color: rgba(34, 197, 94, 0.3);
}

.done-btn.marked {
	background: rgba(34, 197, 94, 0.1);
	color: #16a34a;
	border-color: rgba(34, 197, 94, 0.3);
}

html.dark .done-btn {
	color: #aaa;
	border-color: rgba(255, 255, 255, 0.15);
}

html.dark .done-btn.marked {
	color: #4ade80;
	background: rgba(74, 222, 128, 0.1);
	border-color: rgba(74, 222, 128, 0.3);
}

.section-header {
	margin-bottom: 14px;
}

.section-header h2 {
	font-size: 16px;
	font-weight: 500;
	margin-bottom: 2px;
}

.section-header p {
	font-size: 13px;
	color: #888;
}

/* ── Task controls bar ────────────────────────────────────────────────────── */

#task-controls {
	display: flex;
	gap: 8px;
	flex-wrap: wrap;
	margin-bottom: 12px;
	align-items: center;
}

.ctrl-btn {
	padding: 6px 14px;
	border-radius: 8px;
	border: 0.5px solid rgba(0, 0, 0, 0.12);
	background: transparent;
	cursor: pointer;
	font-size: 12px;
	font-weight: 500;
	color: #555;
	font-family: inherit;
	transition:
		background 0.15s,
		color 0.15s,
		border-color 0.15s;
	white-space: nowrap;
}

.ctrl-btn:hover {
	background: rgba(37, 99, 235, 0.07);
	color: #2563eb;
	border-color: rgba(37, 99, 235, 0.25);
}

html.dark .ctrl-btn {
	color: #aaa;
	border-color: rgba(255, 255, 255, 0.12);
}

html.dark .ctrl-btn:hover {
	background: rgba(96, 165, 250, 0.1);
	color: #60a5fa;
	border-color: rgba(96, 165, 250, 0.25);
}

#continue-btn {
	background: rgba(37, 99, 235, 0.07);
	color: #2563eb;
	border-color: rgba(37, 99, 235, 0.3);
	font-weight: 600;
}

/* ── Focus mode ───────────────────────────────────────────────────────────── */

.wrap.focus-mode .section:not(.active) {
	display: none;
}

.wrap.focus-mode .tabs {
	opacity: 0.5;
}

/* ── Task highlight flash ─────────────────────────────────────────────────── */

@keyframes task-flash {
	0% {
		box-shadow: 0 0 0 3px rgba(37, 99, 235, 0);
		outline: 2px solid rgba(37, 99, 235, 0);
	}

	15% {
		box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.55);
		outline: 2px solid rgba(37, 99, 235, 0.55);
	}

	100% {
		box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.55);
		outline: 2px solid rgba(37, 99, 235, 0.55);
	}
}

.task-highlight {
	box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.55);
	outline: 2px solid rgba(37, 99, 235, 0.55);
	border-radius: 10px;
}