:root {
	--bg: #f5f6f8;
	--card-bg: #ffffff;
	--text: #1b1d21;
	--text-sub: #6b7280;
	--accent: #4f46e5;
	--accent-hover: #4338ca;
	--border: #e5e7eb;
	--danger: #dc2626;
	--success: #16a34a;
	--radius: 14px;
}
@media (prefers-color-scheme: dark) {
	:root {
		--bg: #16171a;
		--card-bg: #212226;
		--text: #f2f2f3;
		--text-sub: #9a9ca3;
		--accent: #818cf8;
		--accent-hover: #a5b0fb;
		--border: #34363b;
		--danger: #f87171;
		--success: #4ade80;
	}
}
* { box-sizing: border-box; }
body {
	margin: 0;
	font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
	background: var(--bg);
	color: var(--text);
	line-height: 1.6;
}
#app {
	max-width: 1500px;
	margin: 0 auto;
	padding: 24px 24px 80px;
}
h1 { font-size: 1.5rem; margin: 0 0 4px; }
h2 { font-size: 1.15rem; margin: 32px 0 12px; }
p.lead { color: var(--text-sub); margin-top: 0; }
p.hint { font-size: 0.85rem; color: var(--text-sub); }
.card {
	background: var(--card-bg);
	border: 1px solid var(--border);
	border-radius: var(--radius);
	padding: 20px;
	margin-bottom: 20px;
}
textarea, input[type=text], select {
	width: 100%;
	padding: 10px 12px;
	border-radius: 10px;
	border: 1px solid var(--border);
	background: var(--bg);
	color: var(--text);
	font-size: 0.95rem;
	font-family: inherit;
}
textarea { min-height: 110px; resize: vertical; }
label { font-weight: 600; font-size: 0.9rem; display: block; margin-bottom: 6px; }
.field { margin-bottom: 16px; }
button {
	background: var(--accent);
	color: #fff;
	border: none;
	border-radius: 10px;
	padding: 9px 16px;
	font-size: 0.9rem;
	font-weight: 600;
	cursor: pointer;
}
button:hover { background: var(--accent-hover); }
button.secondary {
	background: transparent;
	color: var(--accent);
	border: 1px solid var(--accent);
}
button.secondary:hover { background: var(--accent); color: #fff; }
button.danger { background: var(--danger); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

.grid {
	display: grid;
	grid-template-columns: repeat(5, 1fr);
	gap: 14px;
}
@media (max-width: 700px) {
	.grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 420px) {
	.grid { grid-template-columns: repeat(2, 1fr); }
}
.thumb {
	position: relative;
	border-radius: 12px;
	overflow: hidden;
	border: 2px solid var(--border);
	background: var(--bg);
	cursor: pointer;
	aspect-ratio: 1 / 1;
}
.thumb.trap-marker { border-color: #f59e0b; box-shadow: 0 0 0 2px #f59e0b; }
.thumb.trap-hit { border-color: var(--danger); }
.thumb img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
}
.thumb .letter {
	position: absolute;
	top: 6px;
	left: 6px;
	background: rgba(0,0,0,0.65);
	color: #fff;
	font-weight: 700;
	font-size: 0.9rem;
	width: 26px;
	height: 26px;
	border-radius: 50%;
	display: flex;
	align-items: center;
	justify-content: center;
	z-index: 2;
}
.thumb .flag {
	position: absolute;
	top: 6px;
	right: 6px;
	font-size: 1.1rem;
	z-index: 2;
}
.thumb .locked-overlay {
	position: absolute;
	inset: 0;
	background: rgba(0,0,0,0.35);
}
.badges {
	position: absolute;
	bottom: 6px;
	right: 6px;
	z-index: 2;
}
.badge {
	width: 34px;
	height: 34px;
	border-radius: 50%;
	overflow: hidden;
	position: relative;
	border: 2px solid var(--success);
	background: var(--card-bg);
}
.badge.wrong { border-color: var(--danger); }
.badge .x-mark {
	position: absolute;
	inset: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	background: rgba(220,38,38,0.6);
	color: #fff;
	font-weight: 800;
	font-size: 1.1rem;
}

#modalOverlay {
	display: none;
	position: fixed;
	inset: 0;
	background: rgba(0,0,0,0.85);
	z-index: 1000;
	align-items: center;
	justify-content: center;
	padding: 24px;
}
#modalOverlay.open { display: flex; }
#modalOverlay img {
	max-width: 100%;
	max-height: 85vh;
	border-radius: 8px;
}
#modalOverlay .modal-close {
	position: absolute;
	top: 20px;
	right: 24px;
	background: rgba(255,255,255,0.15);
	color: #fff;
	border: none;
	width: 40px;
	height: 40px;
	border-radius: 50%;
	font-size: 1.2rem;
	cursor: pointer;
}
#modalOverlay .modal-letter {
	position: absolute;
	top: 20px;
	left: 24px;
	color: #fff;
	font-weight: 700;
	font-size: 1.1rem;
	background: rgba(255,255,255,0.15);
	padding: 6px 14px;
	border-radius: 20px;
}

#pickerOverlay {
	display: none;
	position: fixed;
	inset: 0;
	background: rgba(0,0,0,0.6);
	z-index: 1000;
	align-items: center;
	justify-content: center;
	padding: 24px;
}
#pickerOverlay.open { display: flex; }
#pickerOverlay .picker-card {
	background: var(--card-bg);
	border-radius: var(--radius);
	padding: 20px;
	max-width: 360px;
	width: 100%;
	max-height: 80vh;
	overflow-y: auto;
}
.member-btn {
	display: flex;
	align-items: center;
	gap: 10px;
	width: 100%;
	padding: 10px 12px;
	border-radius: 10px;
	border: 1px solid var(--border);
	background: var(--bg);
	color: var(--text);
	margin-bottom: 8px;
	cursor: pointer;
	font-size: 0.95rem;
	font-weight: 600;
	text-align: left;
}
.member-btn:hover { border-color: var(--accent); background: var(--accent); color: #fff; }

.sub-row, .member-row {
	display: flex;
	align-items: center;
	gap: 12px;
	padding: 10px 0;
	border-bottom: 1px solid var(--border);
}
.sub-row:last-child, .member-row:last-child { border-bottom: none; }
.sub-name { font-weight: 600; }
.sub-meta { font-size: 0.8rem; color: var(--text-sub); }
.tag {
	font-size: 0.75rem;
	font-weight: 700;
	padding: 2px 8px;
	border-radius: 20px;
}
.tag.correct { background: rgba(22,163,74,0.15); color: var(--success); }
.tag.wrong { background: rgba(220,38,38,0.15); color: var(--danger); }
.tag.current { background: rgba(79,70,229,0.15); color: var(--accent); }

.big-banner {
	position: relative;
	text-align: center;
	font-size: 2rem;
	font-weight: 800;
	padding: 24px;
	border-radius: var(--radius);
	margin-bottom: 20px;
	animation: pop 0.4s ease;
}
.big-banner.success { background: rgba(22,163,74,0.15); color: var(--success); }
.big-banner.failed { background: rgba(220,38,38,0.15); color: var(--danger); }
@keyframes pop {
	0% { transform: scale(0.85); opacity: 0; }
	100% { transform: scale(1); opacity: 1; }
}

.toast {
	position: fixed;
	bottom: 24px;
	left: 50%;
	transform: translateX(-50%);
	background: var(--text);
	color: var(--bg);
	padding: 10px 18px;
	border-radius: 20px;
	font-size: 0.85rem;
	opacity: 0;
	pointer-events: none;
	transition: opacity 0.2s;
	z-index: 2000;
}
.toast.show { opacity: 1; }

.dropzone {
	border: 2px dashed var(--border);
	border-radius: 10px;
	padding: 18px 12px;
	text-align: center;
	cursor: pointer;
	margin-top: 6px;
	transition: border-color 0.15s, background 0.15s;
}
.dropzone:hover { border-color: var(--accent); }
.dropzone.dragover {
	border-color: var(--accent);
	background: rgba(79,70,229,0.08);
}
.dropzone .hint { margin: 0; pointer-events: none; }

table.board-table {
	width: 100%;
	border-collapse: collapse;
	font-size: 0.9rem;
}
table.board-table th, table.board-table td {
	text-align: left;
	padding: 8px 6px;
	border-bottom: 1px solid var(--border);
}
.btn-row { display: flex; gap: 6px; flex-wrap: wrap; }