/* หนังสือรวมข้อสอบ — /exam-book · /exam-book/<เล่ม>
   สีมีความหมาย (ชุดเดียวกับธรรมบท ๒ ภาษา): โจทย์สนามหลวง = หมึกเข้ม ตัวใหญ่ (ตัวเอกของหน้า)
   · บาลีในหนังสือ = อิฐ · แปลโดยอรรถ = เขียว (ซ่อนไว้ เปิดเมื่อต้องการเทียบ) */
:root {
	--xb-bg: #f4f2ec;
	--xb-paper: #fffdf8;
	--xb-line: #e6e0d2;
	--xb-ink: #1b2140;
	--xb-ink-soft: #5b6382;
	--xb-exam: #141a33;
	--xb-pali: #8a3410;
	--xb-attha: #3d6b1f;
	--xb-accent: #3730a3;
	--xb-accent-soft: #e8e7fb;
	--xb-gold: #b45309;
	--xb-gold-soft: #fdf1d8;
	--xb-veil: #ece6d8;
}
:is(html[data-ui="dark"]:not([data-xb-tone="light"]), html[data-xb-tone="dark"]) {
	--xb-bg: #0c1124;
	--xb-paper: #141b34;
	--xb-line: #26304f;
	--xb-ink: #e6e9f5;
	--xb-ink-soft: #9aa3c2;
	--xb-exam: #f3f4fb;
	--xb-pali: #f2a37a;
	--xb-attha: #9ad27a;
	--xb-accent: #c7d2fe;
	--xb-accent-soft: #232c55;
	--xb-gold: #f5bf45;
	--xb-gold-soft: #2f2715;
	--xb-veil: #222b49;
}

body.xb-page { background: var(--xb-bg); color: var(--xb-ink); font-family: 'Sarabun', sans-serif; margin: 0; }
:is(html[data-ui="dark"]:not([data-xb-tone="light"]), html[data-xb-tone="dark"]) .eb-backbar { background: rgba(12, 17, 36, .85); border-color: var(--xb-line); }
:is(html[data-ui="dark"]:not([data-xb-tone="light"]), html[data-xb-tone="dark"]) .eb-back-link { background: var(--xb-paper); border-color: var(--xb-line); color: var(--xb-accent); }
:is(html[data-ui="dark"]:not([data-xb-tone="light"]), html[data-xb-tone="dark"]) .eb-backbar-sub { color: var(--xb-ink-soft); }

.xb-wrap { max-width: 1064px; margin: 0 auto; padding: 0 16px 64px; }

/* ── หัวเล่ม ─────────────────────────────── */
.xb-hero { padding: 36px 0 20px; }
.xb-eyebrow { margin: 0 0 6px; font-size: .85rem; font-weight: 700; letter-spacing: .04em; color: var(--xb-gold); }
.xb-hero h1 { margin: 0; font-size: clamp(1.7rem, 4.4vw, 2.4rem); line-height: 1.25; font-weight: 800; color: var(--xb-ink); }
.xb-hero h1 span { color: var(--xb-accent); }
.xb-lead { margin: 14px 0 0; max-width: 680px; font-size: 1.05rem; line-height: 1.8; color: var(--xb-ink-soft); }
.xb-stats { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 12px 0 0; color: var(--xb-ink-soft); }
.xb-stats b { color: var(--xb-ink); font-size: 1.1rem; }
.xb-legend { display: flex; flex-wrap: wrap; gap: 8px 16px; margin-top: 16px; font-size: .88rem; color: var(--xb-ink-soft); }
.xb-key { display: inline-flex; align-items: center; gap: 7px; }
.xb-key::before { content: ''; width: 12px; height: 12px; border-radius: 3px; }
.xb-key-exam::before { background: var(--xb-exam); }
.xb-key-pali::before { background: var(--xb-pali); }
.xb-key-attha::before { background: var(--xb-attha); }
.xb-notice { padding: 12px 16px; border-radius: 12px; background: var(--xb-gold-soft); color: var(--xb-ink); }

/* ── ชั้นหนังสือ ─────────────────────────── */
.xb-shelf { margin-top: 22px; }
.xb-shelf h2 { margin: 0 0 12px; font-size: 1.15rem; color: var(--xb-ink); }
.xb-shelf-row { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.xb-volume {
	display: flex; flex-direction: column; gap: 4px; padding: 18px 18px 16px; border-radius: 14px;
	background: var(--xb-paper); border: 1px solid var(--xb-line); color: var(--xb-ink-soft); text-decoration: none;
}
.xb-volume.is-ready { color: var(--xb-ink); border-color: var(--xb-accent); box-shadow: 0 8px 22px -14px rgba(55, 48, 163, .55); transition: transform .15s; }
.xb-volume.is-ready:hover { transform: translateY(-2px); }
.xb-volume-level { font-size: 1.5rem; font-weight: 800; }
.xb-volume.is-ready .xb-volume-level { color: var(--xb-accent); }
.xb-volume-book { font-size: .98rem; }
.xb-volume-state { margin-top: 8px; font-size: .85rem; font-weight: 700; }
.xb-volume.is-ready .xb-volume-state { color: var(--xb-accent); }

/* ── แถบเครื่องมือ (ติดหัวจอ) ───────────────── */
.xb-toolbar {
	position: sticky; top: 64px; z-index: 20;   /* ใต้เมนูกลาง (sticky สูง 64px) */
	display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px;
	margin: 0 -16px; padding: 10px 16px; background: color-mix(in srgb, var(--xb-bg) 92%, transparent);
	backdrop-filter: blur(10px); border-bottom: 1px solid var(--xb-line);
}
.xb-select { display: inline-flex; align-items: center; gap: 8px; min-width: 0; flex: 1 1 220px; max-width: 360px;
	padding: 0 12px; border-radius: 10px; background: var(--xb-paper); border: 1px solid var(--xb-line); color: var(--xb-ink-soft); }
.xb-select select { flex: 1; min-width: 0; padding: 9px 0; border: 0; background: transparent; color: var(--xb-ink); font: inherit; font-size: .95rem; }
.xb-select select option { color: #111827; }
.xb-toggles { display: flex; flex-wrap: wrap; gap: 6px; }
.xb-toggle {
	display: inline-flex; align-items: center; gap: 7px; padding: 8px 13px; border-radius: 999px; cursor: pointer;
	border: 1px solid var(--xb-line); background: var(--xb-paper); color: var(--xb-ink); font: inherit; font-size: .92rem; font-weight: 600;
}
.xb-toggle[aria-pressed="true"] { background: var(--xb-accent); border-color: var(--xb-accent); color: #fff; }
:is(html[data-ui="dark"]:not([data-xb-tone="light"]), html[data-xb-tone="dark"]) .xb-toggle[aria-pressed="true"] { color: #141a33; }

/* ── เรื่อง + ข้อ ─────────────────────────── */
.xb-story { scroll-margin-top: 220px; }
.xb-story-title { margin: 34px 0 12px; font-size: 1.35rem; font-weight: 800; color: var(--xb-ink); }
.xb-story-title small { display: block; font-size: .85rem; font-weight: 700; color: var(--xb-gold); }

.xb-item {
	scroll-margin-top: 220px; margin-bottom: 18px; padding: 18px 22px 10px; border-radius: 16px;
	background: var(--xb-paper); border: 1px solid var(--xb-line);
}
.xb-item:target { border-color: var(--xb-gold); box-shadow: 0 0 0 3px var(--xb-gold-soft); }
.xb-item-head { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 12px; padding-bottom: 12px; border-bottom: 1px dashed var(--xb-line); }
.xb-year {
	display: inline-flex; align-items: baseline; gap: 6px; padding: 4px 12px; border-radius: 999px;
	background: var(--xb-gold-soft); color: var(--xb-gold); font-weight: 800; font-size: 1rem; text-decoration: none;
}
.xb-year span { font-weight: 600; font-size: .9rem; }
.xb-page { color: var(--xb-ink-soft); font-size: .92rem; }
.xb-again { font-size: .85rem; color: var(--xb-ink-soft); }
.xb-again a { color: var(--xb-accent); }
.xb-links { display: inline-flex; flex-wrap: wrap; gap: 4px 12px; margin-left: auto; font-size: .85rem; }
.xb-links a { color: var(--xb-ink-soft); text-decoration: none; white-space: nowrap; }
.xb-links a:hover { color: var(--xb-accent); }

.xb-rows { list-style: none; margin: 0; padding: 0; }
.xb-row { display: grid; grid-template-columns: 26px 1fr; gap: 0 10px; padding: 14px 0; border-bottom: 1px solid var(--xb-line); }
.xb-row:last-child { border-bottom: 0; }
.xb-n { padding-top: 4px; font-size: .85rem; color: var(--xb-ink-soft); text-align: right; }
.xb-cell p { margin: 0; }
.xb-exam { font-size: calc(1.18rem * var(--reading-scale, 1) * var(--xb-scale, 1)); line-height: 1.85; color: var(--xb-exam); }
.xb-verse { display: inline-block; padding-left: 2em; }
.xb-pali { margin-top: 6px !important; font-size: calc(1.12rem * var(--reading-scale, 1) * var(--xb-scale, 1)); line-height: 1.8; color: var(--xb-pali); }
.xb-attha { display: none; margin-top: 6px !important; font-size: calc(1rem * var(--reading-scale, 1) * var(--xb-scale, 1)); line-height: 1.75; color: var(--xb-attha); }
.show-attha .xb-attha { display: block; }
.show-attha .xb-attha::before { content: 'อรรถ · '; font-size: .8em; font-weight: 700; }

/* ฝึกแปล: บาลีกลายเป็นแถบปิด แตะเพื่อเปิดทีละประโยค */
.is-practice .xb-pali { position: relative; cursor: pointer; border-radius: 8px; color: transparent; background: var(--xb-veil); user-select: none; }
.is-practice .xb-pali::after {
	content: 'แตะเพื่อดูบาลี'; position: absolute; inset: 0; display: grid; place-items: center;
	color: var(--xb-ink-soft); font-size: .9rem; font-weight: 600;
}
.is-practice .xb-pali.is-open { color: var(--xb-pali); background: transparent; user-select: auto; }
.is-practice .xb-pali.is-open::after { content: none; }
.xb-pali:focus-visible { outline: 2px solid var(--xb-accent); outline-offset: 3px; }

.xb-source { margin-top: 36px; padding-top: 16px; border-top: 1px solid var(--xb-line); font-size: .88rem; line-height: 1.75; color: var(--xb-ink-soft); }
.xb-source a { color: var(--xb-accent); }

@media (max-width: 640px) {
	/* มือถือ: แถบเครื่องมือมี ๒ แถว ถ้าติดหัวจอจะกินที่อ่าน — ให้เลื่อนไปกับหน้า */
	.xb-toolbar { position: static; }
	.xb-story, .xb-item { scroll-margin-top: 76px; }
}
@media (max-width: 560px) {
	.xb-item { padding: 14px 14px 6px; border-radius: 14px; }
	.xb-row { grid-template-columns: 20px 1fr; gap: 0 8px; }
	.xb-links { margin-left: 0; }
	.xb-toggle { padding: 7px 11px; font-size: .86rem; }
}

/* ── ส่งออก PDF ─────────────────────────────── */
.xb-linkbtn { border: 0; background: none; padding: 0; cursor: pointer; font: inherit; font-size: .85rem; color: var(--xb-accent); white-space: nowrap; }
.xb-linkbtn:hover { text-decoration: underline; }
.xb-dialog {
	width: min(520px, calc(100vw - 32px)); max-height: calc(100vh - 32px); padding: 0; border: 1px solid var(--xb-line); border-radius: 16px;
	background: var(--xb-paper); color: var(--xb-ink); box-shadow: 0 24px 60px -20px rgba(20, 26, 51, .5);
}
.xb-dialog::backdrop { background: rgba(12, 17, 36, .55); }
.xb-pdf-form { padding: 22px 24px 18px; font-family: 'Sarabun', sans-serif; }
.xb-pdf-form h2 { display: flex; align-items: center; gap: 10px; margin: 0 0 14px; font-size: 1.3rem; font-weight: 800; }
.xb-pdf-form h2 i { color: var(--xb-pali); }
.xb-pdf-form fieldset { margin: 0 0 14px; padding: 0; border: 0; }
.xb-pdf-form legend { margin-bottom: 6px; font-size: .85rem; font-weight: 800; letter-spacing: .02em; color: var(--xb-gold); }
.xb-pdf-form label { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; padding: 6px 0; font-size: 1rem; line-height: 1.5; cursor: pointer; }
.xb-pdf-form label.xb-sub { padding-left: 26px; font-size: .95rem; color: var(--xb-ink-soft); }
.xb-pdf-form label.is-off { opacity: .45; cursor: default; }
.xb-pdf-form input[type="radio"], .xb-pdf-form input[type="checkbox"] { width: 18px; height: 18px; margin: 0; accent-color: var(--xb-accent); }
.xb-pdf-form select { max-width: 100%; padding: 6px 10px; border: 1px solid var(--xb-line); border-radius: 8px; background: var(--xb-bg); color: var(--xb-ink); font: inherit; font-size: .95rem; }
.xb-pdf-form select option { color: #111827; }
.xb-pdf-status { min-height: 1.4em; margin: 4px 0 10px; font-size: .9rem; color: var(--xb-ink-soft); }
.xb-pdf-actions { display: flex; justify-content: flex-end; gap: 8px; }
.xb-btn-ghost, .xb-btn-main { padding: 9px 18px; border-radius: 999px; font: inherit; font-weight: 700; cursor: pointer; }
.xb-btn-ghost { border: 1px solid var(--xb-line); background: transparent; color: var(--xb-ink); }
.xb-btn-main { display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--xb-accent); background: var(--xb-accent); color: #fff; }
:is(html[data-ui="dark"]:not([data-xb-tone="light"]), html[data-xb-tone="dark"]) .xb-btn-main { color: #141a33; }
.xb-btn-main:disabled { opacity: .6; cursor: progress; }
.xb-pdf-form label[hidden] { display: none; }

/* ── ตัวกรองเล่มรวม: ประโยค · ธรรมบทภาค ─────────── */
.xb-filters { flex-basis: 100%; display: flex; flex-wrap: wrap; align-items: center; gap: 6px 18px; padding-top: 2px; }
.xb-filter { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.xb-filter-label { font-size: .82rem; font-weight: 800; color: var(--xb-gold); margin-right: 2px; }
.xb-chip {
	padding: 5px 12px; border-radius: 999px; border: 1px solid var(--xb-line); background: var(--xb-paper);
	color: var(--xb-ink); font: inherit; font-size: .88rem; font-weight: 600; cursor: pointer; white-space: nowrap;
}
.xb-chip[aria-pressed="true"] { background: var(--xb-ink); border-color: var(--xb-ink); color: var(--xb-paper); }
.xb-chip.is-dim { opacity: .4; }
.xb-filter-count { margin-left: auto; font-size: .85rem; font-weight: 700; color: var(--xb-ink-soft); }
.xb-item[hidden], .xb-story[hidden] { display: none; }

/* ป้ายชั้นของแต่ละข้อ — สีต่างกันตามประโยค (ป.ธ.๔ คราม · ๕ ม่วง · ๖ เขียวหัวเป็ด) */
.xb-level { padding: 3px 10px; border-radius: 999px; font-size: .82rem; font-weight: 800; color: #fff; }
.xb-level-4 { background: #3730a3; }
.xb-level-5 { background: #7c3aed; }
.xb-level-6 { background: #0f766e; }
:is(html[data-ui="dark"]:not([data-xb-tone="light"]), html[data-xb-tone="dark"]) .xb-level-4 { background: #4f46e5; }
:is(html[data-ui="dark"]:not([data-xb-tone="light"]), html[data-xb-tone="dark"]) .xb-level-5 { background: #8b5cf6; }
:is(html[data-ui="dark"]:not([data-xb-tone="light"]), html[data-xb-tone="dark"]) .xb-level-6 { background: #14b8a6; color: #04201d; }
@media (max-width: 640px) {
	.xb-filters { gap: 8px; }
	.xb-filter-count { margin-left: 0; flex-basis: 100%; }
}

/* ── ภาพหัวเล่ม ─────────────────────────────── */
.xb-hero-art {
	display: block; width: 100%; height: auto; aspect-ratio: 1536 / 806; margin-bottom: 18px;
	border-radius: 18px; border: 1px solid var(--xb-line); box-shadow: 0 18px 40px -24px rgba(20, 26, 51, .55);
	background: var(--xb-veil); object-fit: cover;
}
.xb-sr { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
@media (max-width: 560px) { .xb-hero-art { border-radius: 14px; margin-bottom: 14px; } }

/* ── แปลโดยพยัญชนะ (ปุ่ม "แสดงพยัญชนะ" · ?show=thai) — สีครามชุดเดียวกับธรรมบท ๒ ภาษา ── */
:root { --xb-yok: #2d3a8c; }
:is(html[data-ui="dark"]:not([data-xb-tone="light"]), html[data-xb-tone="dark"]) { --xb-yok: #a5b4fc; }
.xb-key-yok::before { background: var(--xb-yok); }
.xb-yok { display: none; margin-top: 6px !important; font-size: calc(1rem * var(--reading-scale, 1) * var(--xb-scale, 1)); line-height: 1.75; color: var(--xb-yok); }
.show-thai .xb-yok { display: block; }
.show-thai .xb-yok::before { content: 'พยัญชนะ · '; font-size: .8em; font-weight: 700; }

/* ── ป้ายใหญ่ (study-cinema .sc-bill — layout หลักแบบ /exam-bank) ── */
/* พื้นที่ป้ายไล่สีลงไปหา = สีกระดาษของหน้าเรา (ไม่ใช่สีพื้นของธีมห้องฉาย) */
html body.sc-page.xb-page { --sc-bg: var(--xb-bg); background: var(--xb-bg); color: var(--xb-ink); }
html[data-ui="light"] body.xb-page .sc-bill::before {
	background:
		linear-gradient(90deg, rgba(244, 242, 236, .97) 0%, rgba(244, 242, 236, .9) 38%, rgba(244, 242, 236, .25) 68%, rgba(244, 242, 236, 0) 100%),
		linear-gradient(0deg, var(--xb-bg) 0%, rgba(244, 242, 236, .6) 18%, rgba(244, 242, 236, 0) 42%);
}
.xb-bill-art { object-position: 70% 45%; }
.xb-bill-inner { min-height: clamp(460px, 64vh, 600px); }
.xb-bill-stats { list-style: none; margin: .15rem 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: .45rem; }
.xb-bill-stats li {
	display: inline-flex; align-items: center; gap: .4rem; padding: .32rem .75rem; border-radius: 999px;
	background: rgba(255, 255, 255, .12); color: #e6eaf6; font-size: calc(.9rem * var(--reading-scale, 1) * var(--xb-scale, 1)); font-weight: 600;
}
.xb-bill-stats i { color: var(--sc-gold); font-size: .8em; }
.xb-bill-stats b { color: var(--sc-gold); font-weight: 800; }
html[data-ui="light"] .xb-bill-stats li { background: rgba(20, 26, 51, .06); color: #333c5c; box-shadow: inset 0 0 0 1px rgba(20, 26, 51, .1); }
.xb-hero-book { padding: 8px 0 12px; scroll-margin-top: 70px; }
@media (max-width: 640px) {
	.xb-bill-art { object-position: 74% 40%; }
	html[data-ui="light"] body.xb-page .sc-bill::before {
		background: linear-gradient(0deg, var(--xb-bg) 0%, var(--xb-bg) calc(100% - 300px), rgba(244, 242, 236, .55) calc(100% - 170px), rgba(244, 242, 236, 0) calc(100% - 60px));
	}
}
.xb-nowrap { white-space: nowrap; }

/* ── ช่องเลือกเรื่องแบบพิมพ์ค้นได้ (Tom Select) — กลืนกับธีมหน้า ── */
.xb-select .ts-wrapper { flex: 1; min-width: 0; }
.xb-select .ts-control, .xb-pdf-form .ts-control {
	border: 0; box-shadow: none; background: transparent; padding: 8px 0; min-height: 0;
	color: var(--xb-ink); font: inherit; font-size: .95rem;
}
.xb-pdf-form .ts-wrapper { flex: 1 1 260px; min-width: 0; }
.xb-pdf-form .ts-control { padding: 6px 10px; border: 1px solid var(--xb-line); border-radius: 8px; background: var(--xb-bg); }
.ts-wrapper .ts-control input { color: var(--xb-ink); font: inherit; }
.ts-wrapper .ts-control input::placeholder { color: var(--xb-ink-soft); }
.ts-dropdown {
	border: 1px solid var(--xb-line); border-radius: 12px; overflow: hidden; margin-top: 6px;
	background: var(--xb-paper); color: var(--xb-ink); font-family: 'Sarabun', sans-serif;
	box-shadow: 0 18px 40px -18px rgba(20, 26, 51, .45);
}
.ts-dropdown .ts-dropdown-content { max-height: min(60vh, 420px); }
.ts-dropdown .optgroup-header {
	position: sticky; top: 0; z-index: 1; padding: 7px 14px; background: var(--xb-gold-soft);
	color: var(--xb-gold); font-size: .82rem; font-weight: 800;
}
.ts-dropdown .option { padding: 8px 14px; }
.ts-dropdown .option.active { background: var(--xb-accent-soft); color: var(--xb-ink); }
.xb-ts-opt { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.xb-ts-opt small { flex: none; color: var(--xb-ink-soft); font-size: .82rem; }
.ts-dropdown .no-results { padding: 10px 14px; color: var(--xb-ink-soft); }
/* เรื่อง/ภาคที่ตัวกรองด้านบนซ่อนไว้ ไม่โผล่ในรายการ */
/* Tom Select ใส่ aria-disabled="true" ให้ตัวเลือกที่ปิด */
.ts-dropdown .option[aria-disabled="true"] { display: none; }
.ts-dropdown .optgroup:not(:has(.option:not([aria-disabled="true"]))) { display: none; }
.xb-pdf-form fieldset.is-off { opacity: .45; }

/* ── ตั้งค่าการอ่าน: สีหน้ากระดาษ ๖ สี (ชุดเดียวกับธรรมบท ๒ ภาษา) · ระยะกระชับ · ขนาดตัวอักษร ───
   html[data-xb-paper] + data-xb-tone (light/dark) ตั้งก่อนวาดหน้าที่ <head> · ไม่ได้เลือก = ตามธีมเว็บ */
html:root[data-xb-tone="light"] {
	--xb-ink: #1b2140; --xb-ink-soft: #5b6382; --xb-exam: #141a33; --xb-pali: #8a3410; --xb-attha: #3d6b1f;
	--xb-accent: #3730a3; --xb-accent-soft: #e8e7fb; --xb-gold: #b45309; --xb-gold-soft: #fdf1d8; --xb-veil: #ece6d8;
	color-scheme: light;
}
html:root[data-xb-paper="white"] { --xb-paper: #ffffff; --xb-bg: #f3f5f9; --xb-line: #e5e7eb; --xb-veil: #eef0f4; }
html:root[data-xb-paper="cream"] { --xb-paper: #fdf6e7; --xb-bg: #f4ecda; --xb-line: #eadcbe; }
html:root[data-xb-paper="sepia"] { --xb-paper: #f1e4c8; --xb-bg: #e6d5b1; --xb-line: #d8c49b; --xb-veil: #e2d0aa;
	--xb-ink: #2b2118; --xb-exam: #22190f; --xb-pali: #6b2a0b; --xb-gold-soft: #f6e3bb; }
html:root[data-xb-paper="tea"] { --xb-paper: #eef5e8; --xb-bg: #e1ecd8; --xb-line: #d3e2c7; --xb-veil: #dbe7d0; }
html:root[data-xb-tone="dark"] {
	--xb-ink: #e6e9f5; --xb-ink-soft: #9aa3c2; --xb-exam: #f3f4fb; --xb-pali: #f2b98f; --xb-attha: #9ed9a8;
	--xb-accent: #c7d2fe; --xb-accent-soft: #232c55; --xb-gold: #f5bf45; --xb-gold-soft: #2f2715;
	color-scheme: dark;
}
html:root[data-xb-paper="night"] { --xb-paper: #1f2433; --xb-bg: #151925; --xb-line: #2e3548; --xb-veil: #283044; }
html:root[data-xb-paper="black"] { --xb-paper: #000000; --xb-bg: #000000; --xb-line: #23262e; --xb-veil: #171a21; }

/* ระยะกระชับ: บรรทัดชิดขึ้น ช่องไฟระหว่างท่อนน้อยลง เห็นได้มากขึ้นในจอเดียว */
html.xb-compact .xb-row { padding: 8px 0; }
html.xb-compact .xb-item { padding-top: 14px; padding-bottom: 6px; }
html.xb-compact .xb-exam { line-height: 1.6; }
html.xb-compact :is(.xb-pali, .xb-attha, .xb-yok) { margin-top: 2px !important; line-height: 1.55; }

.xb-view-sec { padding: 4px 0 16px; border-bottom: 1px solid var(--xb-line); margin-bottom: 14px; }
.xb-view-sec h3 { margin: 0 0 10px; font-size: .85rem; font-weight: 800; letter-spacing: .02em; color: var(--xb-gold); }
.xb-paper-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.xb-paper-opt {
	display: flex; flex-direction: column; align-items: flex-start; gap: 3px; padding: 8px 9px 9px; text-align: left;
	border: 1px solid var(--xb-line); border-radius: 12px; background: var(--xb-paper); color: var(--xb-ink); font: inherit; cursor: pointer;
}
.xb-paper-opt:hover { border-color: #a5b4fc; }
.xb-paper-opt[aria-checked="true"] { border-color: #4f46e5; box-shadow: 0 0 0 2px #4f46e5; }
.xb-paper-sw {
	display: flex; flex-direction: column; gap: 5px; width: 100%; padding: 9px 10px; margin-bottom: 4px;
	border-radius: 8px; border: 1px solid rgba(0, 0, 0, .08); background: var(--sw-bg);
}
.xb-paper-sw span { display: block; height: 4px; border-radius: 3px; }
.xb-paper-sw .sw-exam { width: 70%; background: var(--sw-exam); }
.xb-paper-sw .sw-pali { width: 92%; background: var(--sw-pali); opacity: .8; }
.xb-paper-sw .sw-short { width: 55%; }
.xb-paper-name { font-size: .95rem; font-weight: 800; line-height: 1.25; }
.xb-paper-hint { font-size: .78rem; line-height: 1.35; color: var(--xb-ink-soft); }
.xb-paper-white { --sw-bg: #ffffff; --sw-exam: #141a33; --sw-pali: #8a3410; }
.xb-paper-cream { --sw-bg: #fdf6e7; --sw-exam: #141a33; --sw-pali: #8a3410; }
.xb-paper-sepia { --sw-bg: #f1e4c8; --sw-exam: #22190f; --sw-pali: #6b2a0b; }
.xb-paper-tea { --sw-bg: #eef5e8; --sw-exam: #141a33; --sw-pali: #8a3410; }
.xb-paper-night { --sw-bg: #1f2433; --sw-exam: #f3f4fb; --sw-pali: #f2b98f; }
.xb-paper-black { --sw-bg: #000000; --sw-exam: #f3f4fb; --sw-pali: #f2b98f; }
.xb-view-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.xb-view-btn {
	padding: 9px 18px; border-radius: 999px; border: 1px solid var(--xb-line); background: var(--xb-paper);
	color: var(--xb-ink); font: inherit; font-weight: 700; cursor: pointer;
}
.xb-view-btn[aria-pressed="true"] { background: #4f46e5; border-color: #4f46e5; color: #fff; }
.xb-view-step {
	width: 46px; height: 42px; border-radius: 12px; border: 1px solid var(--xb-line); background: var(--xb-paper);
	color: var(--xb-ink); font: inherit; cursor: pointer;
}
.xb-view-step:disabled { opacity: .4; cursor: default; }
.xb-view-step[data-step="0"] { margin-left: 6px; }
.xb-scale-val { min-width: 64px; text-align: center; font-size: 1.05rem; font-weight: 700; color: var(--xb-ink-soft); }
@media (max-width: 380px) { .xb-paper-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

/* PDF เฉพาะเรื่อง → ติ๊กเลือกข้อ (ชั้น · ปี ข้อ · หน้า) */
.xb-story-items { margin: 2px 0 6px 26px; padding: 8px 12px 6px; border: 1px solid var(--xb-line); border-radius: 12px; background: var(--xb-bg); }
.xb-story-items[hidden] { display: none; }
.xb-story-items-head { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 14px; padding-bottom: 6px; border-bottom: 1px dashed var(--xb-line); }
.xb-story-items-head span { margin-right: auto; font-size: .85rem; font-weight: 800; color: var(--xb-ink-soft); }
.xb-story-items-list { max-height: 210px; overflow-y: auto; }
.xb-pdf-form .xb-story-items-list label { flex-wrap: nowrap; gap: 8px; padding: 6px 0; font-size: .95rem; border-bottom: 1px solid var(--xb-line); }
.xb-pdf-form .xb-story-items-list label:last-child { border-bottom: 0; }
.xb-story-items-list .xb-level { flex: none; padding: 1px 8px; font-size: .75rem; }
.xb-story-items-list b { font-weight: 700; color: var(--xb-gold); white-space: nowrap; }
.xb-pick-page { margin-left: auto; font-size: .85rem; color: var(--xb-ink-soft); white-space: nowrap; }
@media (max-width: 560px) {
	.xb-pdf-form .ts-wrapper { flex-basis: 100%; }
	.xb-story-items { margin-left: 0; padding: 8px 10px 4px; }
	.xb-pdf-form .xb-story-items-list label { flex-wrap: wrap; row-gap: 2px; }
	.xb-pick-page { flex-basis: 100%; margin-left: 26px; }
}
.xb-pdf-form label.xb-scope-story { color: var(--xb-ink); }
.xb-pdf-form label.xb-scope-story .ts-wrapper { flex: 1 1 220px; }
.xb-pdf-form label.xb-lines-extra { margin-top: 4px; padding-top: 10px; border-top: 1px dashed var(--xb-line); }