/* แบบฝึกหัดประกอบการติว — ใช้พื้นฐานจาก page/exam_blank/css/style.css (ตัวแปร --eb-* และปุ่ม .eb-btn)
   ไฟล์นี้มีเฉพาะส่วนที่ต่างไป: การ์ดเลือกหัวข้อ ตัวเลือกจำนวนข้อ และรายการดูข้อล่วงหน้า */

.et-step {
	width: 1.45rem;
	height: 1.45rem;
	display: inline-grid;
	place-items: center;
	border-radius: 50%;
	background: var(--eb-primary);
	color: #fff;
	font-size: .8rem;
	line-height: 1;
}

/* ๑. การ์ดหัวข้อ */
.et-topics {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(9.5rem, 1fr));
	gap: .5rem;
}

.et-topic {
	display: grid;
	grid-template-columns: auto 1fr;
	grid-template-rows: auto auto;
	column-gap: .5rem;
	align-items: center;
	padding: .55rem .7rem;
	border: 1px solid var(--eb-line);
	border-radius: 11px;
	background: #fff;
	color: var(--eb-text);
	text-align: left;
	cursor: pointer;
	transition: border-color 160ms ease-out, background-color 160ms ease-out, box-shadow 160ms ease-out;
}

.et-topic:hover { border-color: var(--eb-line-strong); background: #fafdfc; }

.et-topic-no {
	grid-row: 1 / 3;
	width: 1.8rem;
	height: 1.8rem;
	display: grid;
	place-items: center;
	border-radius: 8px;
	background: var(--eb-primary-soft);
	color: var(--eb-primary);
	font-size: .92rem;
}

.et-topic-name { font-size: 1.02rem; line-height: 1.25; font-weight: 600; }
.et-topic-max { color: var(--eb-text-soft); font-size: .74rem; line-height: 1.5; }

.et-topic.is-active {
	border-color: var(--eb-primary);
	background: var(--eb-primary-soft);
	box-shadow: inset 0 0 0 1px var(--eb-primary);
}

.et-topic.is-active .et-topic-no { background: var(--eb-primary); color: #fff; }
.et-topic.is-active .et-topic-max { color: var(--eb-primary-dark); }

/* ๒. จำนวนข้อ */
.et-count {
	display: grid;
	grid-template-columns: auto minmax(0, 1fr) auto;
	align-items: center;
	gap: .9rem;
	max-width: 36rem;
}

.et-count-main { display: grid; gap: .15rem; min-width: 0; }

.et-count-label {
	display: flex;
	align-items: baseline;
	flex-wrap: wrap;
	gap: .1rem .45rem;
	font-size: 1rem;
}

.et-count-value {
	font-size: 2rem;
	line-height: 1;
	font-weight: 600;
	color: var(--eb-primary);
	font-variant-numeric: tabular-nums;
}

.et-count-marks {
	margin-left: auto;
	padding: .05rem .6rem;
	border-radius: 999px;
	background: var(--eb-answer-soft);
	color: var(--eb-answer);
	font-size: .8rem;
}

.et-range {
	--fill: 0%;
	width: 100%;
	height: 1.6rem;
	margin: 0;
	background: transparent;
	cursor: pointer;
	-webkit-appearance: none;
	appearance: none;
}

.et-range::-webkit-slider-runnable-track {
	height: .4rem;
	border-radius: 999px;
	background: linear-gradient(to right, var(--eb-primary) var(--fill), var(--eb-line) var(--fill));
}

.et-range::-moz-range-track { height: .4rem; border-radius: 999px; background: var(--eb-line); }
.et-range::-moz-range-progress { height: .4rem; border-radius: 999px; background: var(--eb-primary); }

.et-range::-webkit-slider-thumb {
	-webkit-appearance: none;
	width: 1.25rem;
	height: 1.25rem;
	margin-top: -.43rem;
	border: 3px solid #fff;
	border-radius: 50%;
	background: var(--eb-primary);
	box-shadow: 0 1px 4px rgba(20, 60, 50, .35);
}

.et-range::-moz-range-thumb {
	width: 1rem;
	height: 1rem;
	border: 3px solid #fff;
	border-radius: 50%;
	background: var(--eb-primary);
	box-shadow: 0 1px 4px rgba(20, 60, 50, .35);
}

.et-range:focus-visible { outline: 3px solid #e8b84e; outline-offset: 2px; border-radius: 6px; }

.et-range-ends {
	display: flex;
	justify-content: space-between;
	color: var(--eb-text-soft);
	font-size: .72rem;
	line-height: 1.2;
}

.et-step-btn {
	width: 2.4rem;
	height: 2.4rem;
	display: grid;
	place-items: center;
	border: 1px solid var(--eb-line-strong);
	border-radius: 50%;
	background: #fff;
	color: var(--eb-primary);
	font-size: .85rem;
	cursor: pointer;
	transition: background-color 160ms ease-out;
}

.et-step-btn:hover:not(:disabled) { background: var(--eb-primary-soft); }
.et-step-btn:disabled { opacity: .35; cursor: not-allowed; }
.et-step-btn:focus-visible, .et-topic:focus-visible { outline: 3px solid #e8b84e; outline-offset: 2px; }

.et-limit {
	display: flex;
	align-items: flex-start;
	gap: .45rem;
	margin: .8rem 0 0;
	padding: .5rem .7rem;
	border-radius: 10px;
	background: #fbf5ea;
	color: #6f4b12;
	font-size: .82rem;
	line-height: 1.6;
}

.et-limit i { margin-top: .25em; }

/* ๓. ดาวน์โหลด */
.et-actions { display: flex; flex-wrap: wrap; gap: .55rem; }
.et-big { min-height: 2.6rem; padding-inline: 1.15rem; font-size: .98rem; }

.et-preview {
	margin-top: .9rem;
	border-top: 1px solid var(--eb-line);
	padding-top: .6rem;
}

.et-preview summary {
	width: fit-content;
	color: var(--eb-primary);
	font-size: .88rem;
	cursor: pointer;
}

.et-preview summary:focus-visible { outline: 3px solid #e8b84e; outline-offset: 2px; border-radius: 4px; }

.et-preview-list {
	list-style: none;
	margin: .5rem 0 0;
	padding: 0;
	display: grid;
	gap: .35rem;
}

.et-preview-list > li {
	display: grid;
	grid-template-columns: 1.8rem minmax(0, 1fr);
	gap: .2rem;
	padding: .3rem 0;
	border-bottom: 1px dashed var(--eb-line);
	font-size: .9rem;
	line-height: 1.55;
}

.et-preview-list > li:last-child { border-bottom: none; }
.et-preview-no { color: var(--eb-primary); font-variant-numeric: tabular-nums; }
.et-preview-item { overflow-wrap: anywhere; }
.et-preview-letter { margin-right: .3rem; color: var(--eb-text-soft); }
.et-preview-cite { margin-left: .35rem; color: #8a9c96; font-size: .76rem; white-space: nowrap; }

@media (max-width: 560px) {
	.et-topics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
	/* การ์ดครึ่งจอแคบเกินให้ทั้งเลขลำดับและชื่อ — "นามและสัพพนาม" ขาดกลางคำเป็น "สัพพนา / ม" */
	.et-topic { grid-template-columns: 1fr; padding: .5rem .65rem; }
	.et-topic-no { display: none; }
	.et-topic-name { white-space: nowrap; }
	.et-count { gap: .55rem; }
	.et-count-marks { margin-left: 0; }
	.et-actions { display: grid; grid-template-columns: 1fr 1fr; }
	.et-big { width: 100%; }
	.et-preview-cite { white-space: normal; }
}