/* BLUEWOOD eLearning - trang học /learn.
 * Hướng thiết kế "Lắp tủ theo bản vẽ" (anh duyệt 04/11/2026, mẫu docs/BLUEWOOD/design/mau_phieu_cong_doan.html):
 *  - lộ trình = dãy tủ vẽ theo bản vẽ mặt đứng; chiều rộng cánh và chuỗi kích thước theo số phút của bài;
 *  - học xong bài thì cánh tủ lắp bằng vật liệu sồi thật (ảnh trích từ video công trình), bài kiểm tra = mặt đá lắp sau cùng;
 *  - đạt thì hiện ảnh công trình thật + tem tròn ĐẠT · XUẤT XƯỞNG;
 *  - Montserrat cho nút và số, Playfair Display cho tên khoá, Inter cho nội dung (Brand-Identity); nút bo 10px, chữ hoa, có mũi tên;
 *  - xanh cho hành động chính, đỏ gạch chỉ cho "chưa đạt".
 * Class dùng trong JS (giữ nguyên tên): bl-page/is-loading, bl-pages (--zoom), is-shielded, bl-shield, bl-option/is-selected,
 * bl-palette__dot/is-answered/is-current, bl-overlay/is-open, bl-timer/is-warn/is-danger, bl-exam__saved, bl-install, bl-question.
 */
@font-face { font-family: 'Montserrat'; src: url('../fonts/Montserrat-wght.woff2') format('woff2'); font-weight: 500 800; font-display: swap; }
@font-face { font-family: 'Inter'; src: url('../fonts/Inter-wght.woff2') format('woff2'); font-weight: 400 700; font-display: swap; }
@font-face { font-family: 'Playfair Display'; src: url('../fonts/PlayfairDisplay-SemiBold.woff2') format('woff2'); font-weight: 600; font-display: swap; }

/* Thuộc tính hidden (JS bật / tắt) luôn thắng display của class (.bl-badge, .bl-btn...). */
[hidden] { display: none !important; }

:root {
    --bl-paper: #F6F3EB;
    --bl-white: #FFFFFF;
    --bl-ink: #333333;
    --bl-green: #1F5E3A;
    --bl-moss: #3A6B4A;
    --bl-green-tint: #F1F6F2;
    --bl-accent: #1F5E3A;
    --bl-wood: #8B5E34;
    --bl-sand: #E7D8B8;
    --bl-error: #A8442E;
    --bl-error-tint: #F9EEEA;
    --bl-line: #DADADA;
    --bl-line-soft: #ECE9E2;
    --bl-gray: #5F5F5F;
    --bl-stone: #DDD9D0;
    --bl-display: 'Montserrat', 'Segoe UI', Arial, sans-serif;
    --bl-font: 'Inter', 'Segoe UI', Arial, sans-serif;
    --bl-serif: 'Playfair Display', Georgia, serif;
    --bl-header-h: 60px;
    --bl-radius: 10px;
    --bl-oak: url('../img/vl_go_soi.jpg');
    /* Nét đứt chỉ chiều mở cánh như trên bản vẽ tủ: cánh chưa lắp */
    --bl-swing: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100' preserveAspectRatio='none'%3E%3Cpath d='M0 0L100 50L0 100' fill='none' stroke='%23ABABAB' stroke-width='1' stroke-dasharray='5 4' vector-effect='non-scaling-stroke'/%3E%3C/svg%3E");
}

/* ------------------------------ Nền tảng ------------------------------ */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body.bl-body { margin: 0; background: var(--bl-paper); color: var(--bl-ink); font-family: var(--bl-font); font-size: 15px; line-height: 1.55; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
h1, h2, h3, h4 { font-family: var(--bl-display); font-weight: 800; line-height: 1.15; margin: 0 0 10px; color: var(--bl-ink); letter-spacing: -.01em; }
h2 { font-size: 22px; }
h3 { font-size: 17px; }
p { margin: 0 0 10px; }
button { font-family: inherit; }
:focus-visible { outline: 2px solid var(--bl-accent); outline-offset: 2px; }

.bl-container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.bl-main { min-height: calc(100vh - var(--bl-header-h) - 60px); padding: 28px 0 56px; }
.bl-section { margin-top: 36px; }
.bl-section--narrow { max-width: 640px; }
.bl-muted { color: var(--bl-gray); }
.bl-prewrap { white-space: pre-wrap; }
.bl-clamp-2 { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.bl-text-danger { color: var(--bl-error); }
.bl-text-warn { color: var(--bl-error); }
.bl-link { color: var(--bl-green); font-weight: 600; border-bottom: 1px solid var(--bl-line); }
.bl-link:hover { border-bottom-color: var(--bl-accent); }
.bl-eyebrow { display: inline-block; font-family: var(--bl-display); font-weight: 700; font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--bl-green); }
.bl-eyebrow--muted { color: var(--bl-gray); }
.bl-meta { font-size: 13px; color: var(--bl-gray); }
.bl-subtitle { font-size: 15px; margin: 22px 0 8px; }
.bl-mt { margin-top: 22px; }
.bl-num { font-family: var(--bl-display); font-weight: 800; font-variant-numeric: tabular-nums; }

/* Tiêu đề trang: eyebrow + tiêu đề lớn */
.bl-page-head { padding-bottom: 4px; }
.bl-page-title { font-size: 36px; margin: 6px 0 8px; }
.bl-rule { height: 1px; background: var(--bl-green); margin: 14px 0 22px; }
.bl-rule span { display: none; }
.bl-rule--light { background: var(--bl-line); }

/* Nhãn section + kẻ kéo hết dòng */
.bl-section-label { display: flex; align-items: center; gap: 16px; margin-bottom: 16px; }
.bl-section-label span { font-family: var(--bl-display); font-weight: 700; font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--bl-green); white-space: nowrap; }
.bl-section-label::after { content: ''; flex: 1; height: 1px; background: var(--bl-green); }

/* ------------------------------ Header ------------------------------ */
.bl-header { position: sticky; top: 0; z-index: 50; background: var(--bl-white); border-bottom: 1px solid var(--bl-green); }
.bl-header__inner { height: var(--bl-header-h); display: flex; align-items: center; gap: 28px; }
.bl-header__brand { display: flex; align-items: center; gap: 12px; }
.bl-header__logo { height: 34px; display: block; }
.bl-nav { display: flex; gap: 26px; margin-left: 6px; }
.bl-nav__link { font-family: var(--bl-display); font-weight: 700; font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--bl-green); padding: 22px 0 20px; border-bottom: 2px solid transparent; white-space: nowrap; }
.bl-nav__link:hover { border-bottom-color: var(--bl-line); }
.bl-nav__link.is-active { border-bottom-color: var(--bl-accent); }
.bl-user { margin-left: auto; display: flex; align-items: center; gap: 14px; min-width: 0; }
.bl-user__avatar { width: 30px; height: 30px; display: grid; place-items: center; background: var(--bl-green); color: var(--bl-white); font-family: var(--bl-display); font-weight: 800; font-size: 13px; border-radius: var(--bl-radius); }
.bl-user__name { font-weight: 600; font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 220px; }
.bl-user__logout-form { margin: 0; }
.bl-user__logout { display: inline-flex; align-items: center; gap: 6px; background: none; border: 0; padding: 6px 0; cursor: pointer; color: var(--bl-green); font-family: var(--bl-display); font-weight: 700; font-size: 12px; letter-spacing: .08em; text-transform: uppercase; white-space: nowrap; }
.bl-user__logout .bl-user__name { font-family: var(--bl-display); font-weight: 700; font-size: 12px; max-width: none; }
.bl-btn, .bl-install { white-space: nowrap; }
.bl-user__logout .fa { font-size: 14px; }
.bl-install { margin-right: 4px; }

/* ------------------------------ Footer / tab bar ------------------------------ */
.bl-footer { border-top: 1px solid var(--bl-line); background: var(--bl-white); font-size: 12.5px; color: var(--bl-gray); }
.bl-footer__inner { display: flex; justify-content: space-between; gap: 16px; padding: 18px 24px; flex-wrap: wrap; }
.bl-footer__note .fa { color: var(--bl-wood); margin-right: 4px; }
.bl-tabbar { display: none; }

/* ------------------------------ Nút ------------------------------ */
.bl-btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; font-family: var(--bl-display); font-weight: 700; font-size: 13px; letter-spacing: .08em; text-transform: uppercase; line-height: 1.2; padding: 13px 22px; border-radius: var(--bl-radius); border: 1px solid var(--bl-green); background: var(--bl-white); color: var(--bl-green); cursor: pointer; text-align: center; white-space: nowrap; }
.bl-btn:hover { background: var(--bl-green-tint); }
.bl-btn--primary { background: var(--bl-green); border-color: var(--bl-green); color: var(--bl-white); }
.bl-btn--primary:hover { background: var(--bl-ink); }
.bl-btn--accent { background: var(--bl-accent); border-color: var(--bl-accent); color: var(--bl-white); }
.bl-btn--accent:hover { background: var(--bl-error); border-color: var(--bl-error); }
.bl-btn--ghost { background: transparent; border-color: var(--bl-white); color: var(--bl-white); }
.bl-btn--ghost:hover { background: rgba(255, 255, 255, .12); }
.bl-btn--ghost-dark { background: var(--bl-white); }
.bl-btn--block { display: flex; width: 100%; }
.bl-btn--sm { padding: 9px 14px; font-size: 11px; }
.bl-btn--lg { padding: 16px 30px; font-size: 14px; }
.bl-btn[disabled] { opacity: .5; cursor: default; }
.bl-btn .fa { font-size: 14px; }
.bl-icon-btn { width: 36px; height: 36px; display: inline-grid; place-items: center; border: 1px solid var(--bl-line); background: var(--bl-white); color: var(--bl-green); border-radius: var(--bl-radius); cursor: pointer; }
.bl-icon-btn:hover { border-color: var(--bl-green); }

/* ------------------------------ Nhãn / chip ------------------------------ */
.bl-badge { display: inline-block; font-family: var(--bl-display); font-weight: 700; font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--bl-gray); padding: 2px 0; border-bottom: 2px solid var(--bl-line); white-space: nowrap; }
.bl-badge--ok { color: var(--bl-green); border-bottom-color: var(--bl-green); }
.bl-badge--green { color: var(--bl-green); border-bottom-color: var(--bl-green); }
.bl-badge--accent { color: var(--bl-error); border-bottom-color: var(--bl-accent); }
.bl-badge--warn { color: var(--bl-error); border-bottom-color: var(--bl-accent); }
.bl-badge--danger { color: var(--bl-error); border-bottom-color: var(--bl-error); }
.bl-chip { display: inline-block; font-family: var(--bl-display); font-weight: 700; font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--bl-green); border: 1px solid var(--bl-green); padding: 6px 12px; border-radius: var(--bl-radius); }

/* ------------------------------ Thông báo / form ------------------------------ */
.bl-alert { padding: 12px 16px; margin: 0 0 16px; border: 1px solid var(--bl-line); border-left: 3px solid var(--bl-green); background: var(--bl-white); font-size: 14px; }
.bl-alert--danger { border-left-color: var(--bl-error); color: var(--bl-error); }
.bl-alert--success { border-left-color: var(--bl-green); color: var(--bl-green); font-weight: 600; }
.bl-alert--info { border-left-color: var(--bl-gray); color: var(--bl-ink); }
.bl-field { display: block; margin-bottom: 16px; }
.bl-field__label { display: block; font-family: var(--bl-display); font-weight: 700; font-size: 10.5px; letter-spacing: .14em; text-transform: uppercase; color: var(--bl-gray); margin-bottom: 6px; }
.bl-input { width: 100%; padding: 12px 14px; border: 1px solid var(--bl-line); border-radius: var(--bl-radius); background: var(--bl-white); font: inherit; color: var(--bl-ink); }
.bl-input:focus { border-color: var(--bl-green); outline: none; }
.bl-input-group { position: relative; display: block; }
.bl-input-group .bl-input { padding-right: 46px; }
.bl-input-group__btn { position: absolute; right: 4px; top: 4px; bottom: 4px; width: 38px; border: 0; background: none; color: var(--bl-gray); cursor: pointer; }

/* ------------------------------ Khối chung ------------------------------ */
.bl-card { background: var(--bl-white); border: 1px solid var(--bl-line); padding: 22px 24px; }
.bl-card--frame { border-color: var(--bl-green); outline: 1px solid var(--bl-green); outline-offset: 3px; }
.bl-empty { text-align: center; padding: 40px 24px; }
.bl-empty .fa { font-size: 28px; color: var(--bl-green); margin-bottom: 12px; }
.bl-empty p { max-width: 460px; margin: 0 auto 16px; }
.bl-facts { list-style: none; padding: 0; margin: 0; }
.bl-facts li { display: flex; align-items: baseline; gap: 10px; padding: 7px 0; border-bottom: 1px solid var(--bl-line-soft); font-size: 14px; }
.bl-facts li:last-child { border-bottom: 0; }
.bl-facts .fa { color: var(--bl-green); width: 16px; text-align: center; font-size: 13px; }
.bl-dl { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 8px 20px; margin: 0; }
.bl-dl dt { font-family: var(--bl-display); font-weight: 700; font-size: 10.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--bl-gray); align-self: baseline; }
.bl-dl dd { margin: 0; font-weight: 600; min-width: 0; overflow-wrap: anywhere; }

/* ------------------------------ Đăng nhập ------------------------------ */
.bl-body--auth .bl-main { min-height: 100vh; padding: 0; display: grid; place-items: center; background: var(--bl-paper) repeating-linear-gradient(0deg, transparent 0 31px, var(--bl-line-soft) 31px 32px); }
.bl-auth { width: min(100%, 460px); padding: 32px 20px; }
.bl-auth__brand { text-align: center; margin-bottom: 18px; }
.bl-auth__emblem { height: 44px; display: inline-block; }
.bl-auth__title { font-size: 12px; letter-spacing: .22em; text-transform: uppercase; color: var(--bl-gray); margin: 12px 0 0; font-family: var(--bl-display); font-weight: 700; }
.bl-auth__card { padding: 30px 32px; border-color: var(--bl-green); outline: 1px solid var(--bl-green); outline-offset: 3px; }
.bl-auth__logo { height: 38px; display: block; margin: 0 auto 18px; }
.bl-auth__heading { font-size: 22px; text-align: center; }
.bl-auth__card > .bl-muted { text-align: center; font-size: 13.5px; margin-bottom: 20px; }
.bl-auth__help { text-align: center; font-size: 12.5px; margin: 16px 0 0; }
.bl-auth__points { display: none; }




/* Sổ điểm */
.bl-ledger { width: 100%; border-collapse: collapse; background: var(--bl-white); border: 1px solid var(--bl-line); }
.bl-ledger th, .bl-ledger td { padding: 12px 10px; text-align: center; border-bottom: 1px solid var(--bl-line-soft); }
.bl-ledger th { font-family: var(--bl-display); font-weight: 700; font-size: 10px; letter-spacing: .12em; text-transform: uppercase; color: var(--bl-gray); border-bottom: 1px solid var(--bl-green); }
.bl-ledger td { font-family: var(--bl-display); font-weight: 700; font-size: 18px; color: var(--bl-green); }
.bl-ledger td.is-fail { color: var(--bl-error); }
.bl-ledger td.is-empty { color: var(--bl-line); font-weight: 400; }
.bl-ledger td.is-pending { font-family: var(--bl-font); font-weight: 600; font-size: 12px; color: var(--bl-gray); }
.bl-ledger td.is-total { background: var(--bl-green); color: var(--bl-white); }
.bl-ledger tfoot td { font-family: var(--bl-font); font-weight: 400; font-size: 12.5px; color: var(--bl-gray); text-align: left; border: 0; }

/* Việc tiếp theo / kiểm tra định kỳ: hàng kẻ, không card nổi */
.bl-next { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.bl-next__body { flex: 1; min-width: 240px; }
.bl-next__body h3 { margin: 2px 0 4px; }
.bl-next__body p { margin: 0 0 4px; }
.bl-assess-list { display: grid; gap: 14px; }
.bl-assess__head { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.bl-assess__head .bl-badge { margin-left: auto; }
.bl-assess__note { margin: 12px 0 0; font-size: 13.5px; }
.bl-assess__review { margin-top: 12px; display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.bl-assess__lesson { font-size: 13.5px; }

/* Khoá học của tôi (nhiều khoá) */
.bl-courses { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.bl-course { display: flex; flex-direction: column; gap: 10px; position: relative; padding-bottom: 20px; }
.bl-course:hover { border-color: var(--bl-green); }
.bl-course__top { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.bl-course__state { font-family: var(--bl-display); font-weight: 700; font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase; }
.bl-course h3 { font-size: 16px; min-height: 2.3em; margin: 0; }
.bl-course__bar { height: 3px; background: var(--bl-line-soft); position: relative; }
.bl-course__bar span { position: absolute; left: 0; top: 0; bottom: 0; background: var(--bl-green); }
.bl-course .bl-link { align-self: flex-start; }

.bl-table--compact td { padding: 8px 10px; font-size: 14px; }


/* ------------------------------ Kết quả / lịch sử / hồ sơ ------------------------------ */
.bl-testgroup { font-size: 13px; margin: 18px 0 10px; color: var(--bl-gray); font-family: var(--bl-display); font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.bl-testgrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.bl-testmini { display: flex; flex-direction: column; gap: 6px; padding: 16px 18px; }
.bl-testmini:hover { border-color: var(--bl-green); }
.bl-testmini .bl-badge { align-self: flex-start; }
.bl-table-wrap { padding: 0; overflow-x: auto; }
.bl-table { width: 100%; border-collapse: collapse; }
.bl-table th { text-align: left; font-family: var(--bl-display); font-weight: 700; font-size: 10px; letter-spacing: .12em; text-transform: uppercase; color: var(--bl-gray); padding: 12px 16px; border-bottom: 1px solid var(--bl-green); }
.bl-table td { padding: 12px 16px; border-bottom: 1px solid var(--bl-line-soft); font-size: 14px; vertical-align: middle; }
.bl-profile { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.bl-profile > *, .bl-profile__info > * { min-width: 0; }
.bl-profile__info { display: flex; gap: 22px; align-items: flex-start; }
.bl-profile__avatar { width: 64px; height: 64px; display: grid; place-items: center; background: var(--bl-green); color: var(--bl-white); font-family: var(--bl-display); font-weight: 800; font-size: 26px; flex: none; }
.bl-profile__password .bl-btn { margin-top: 6px; }
.bl-profile__app p, .bl-profile__help p { font-size: 14px; }
/* Chứng chỉ (R72): thẻ chiếm cả hàng, tem QC như cánh tủ đạt; điện thoại thì nút tải xuống dòng dưới. */
.bl-profile__certs { grid-column: 1 / -1; }
.bl-certs { display: grid; gap: 10px; margin-top: 8px; }
.bl-cert { display: flex; align-items: center; gap: 14px; padding: 12px 14px; background: var(--bl-white); border: 1px solid var(--bl-line); flex-wrap: wrap; }
.bl-cert .bl-qc { flex: none; }
.bl-cert__body { flex: 1; min-width: 180px; }
.bl-cert__body strong { display: block; }
.bl-cert.is-expired .bl-qc { background: var(--bl-gray); box-shadow: inset 0 0 0 2px var(--bl-gray), inset 0 0 0 3px rgba(255, 255, 255, .75); }
/* Trang Hướng dẫn (/learn/help) */
.bl-help { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 20px; }
.bl-help__video video { display: block; width: 100%; aspect-ratio: 16 / 9; background: #000; border: 1px solid var(--bl-green); margin-bottom: 12px; }
.bl-help__video p { font-size: 14px; margin: 4px 0 0; }
.bl-faq dt { font-weight: 700; color: var(--bl-green); margin-top: 12px; }
.bl-faq dd { margin: 4px 0 0; font-size: 14px; }

/* ------------------------------ Bài test: giới thiệu ------------------------------ */
.bl-exam-intro { display: grid; grid-template-columns: 1fr 340px; gap: 28px; }
.bl-factgrid { list-style: none; padding: 0; margin: 0 0 18px; display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--bl-line); }
.bl-factgrid li { padding: 14px 12px; text-align: center; border-right: 1px solid var(--bl-line-soft); }
.bl-factgrid li:last-child { border-right: 0; }
.bl-factgrid .fa { display: block; color: var(--bl-green); font-size: 14px; margin-bottom: 6px; }
.bl-factgrid strong { display: block; font-family: var(--bl-display); font-weight: 800; font-size: 20px; color: var(--bl-green); }
.bl-factgrid span { font-size: 12px; color: var(--bl-gray); }
.bl-rules { padding-left: 18px; margin: 0 0 20px; font-size: 14px; }
.bl-rules li { margin-bottom: 6px; }
.bl-exam-intro__cta { margin-top: 8px; }
.bl-exam-intro__side .bl-eyebrow { display: block; margin-bottom: 8px; }
.bl-attempts { list-style: none; padding: 0; margin: 12px 0 0; }
.bl-attempts li { display: flex; align-items: center; gap: 12px; padding: 8px 0; border-bottom: 1px solid var(--bl-line-soft); font-size: 14px; }
.bl-attempts li .bl-link { margin-left: auto; }

/* ------------------------------ Bài test: làm bài ------------------------------ */
.bl-body--exam { background: var(--bl-paper); }
.bl-exam__bar { position: sticky; top: 0; z-index: 60; background: var(--bl-green); color: var(--bl-white); }
.bl-exam__bar-inner { display: flex; align-items: center; gap: 16px; height: 60px; }
.bl-exam__emblem { height: 30px; filter: brightness(0) invert(1); }
.bl-exam__title { flex: 1; min-width: 0; }
.bl-exam__title .bl-eyebrow { color: rgba(255, 255, 255, .7); display: block; }
.bl-exam__title strong { display: block; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-family: var(--bl-display); font-weight: 700; }
.bl-timer { font-family: var(--bl-display); font-weight: 800; font-size: 22px; letter-spacing: .04em; font-variant-numeric: tabular-nums; display: inline-flex; align-items: center; gap: 8px; padding: 4px 12px; border: 1px solid rgba(255, 255, 255, .5); }
.bl-timer .fa { font-size: 14px; }
.bl-timer.is-warn { border-color: var(--bl-sand); color: var(--bl-sand); }
.bl-timer.is-danger { background: var(--bl-error); border-color: var(--bl-error); color: var(--bl-white); }
.bl-exam__progress { height: 3px; background: rgba(255, 255, 255, .15); }
.bl-exam__progress span { display: block; height: 100%; width: 0; background: var(--bl-sand); }
.bl-exam__body { display: grid; grid-template-columns: 1fr 280px; gap: 24px; padding-top: 24px; align-items: start; }
.bl-question { padding: 26px 28px; }
.bl-question__head { display: flex; align-items: center; gap: 14px; margin-bottom: 12px; }
.bl-question__no { font-family: var(--bl-display); font-weight: 800; font-size: 15px; color: var(--bl-green); }
.bl-question__text { font-size: 17px; font-weight: 600; line-height: 1.5; margin-bottom: 16px; }
.bl-question__img { margin: 0 0 16px; border: 1px solid var(--bl-line); padding: 6px; max-width: 520px; }
.bl-question__img img { display: block; width: 100%; pointer-events: none; }
.bl-options { display: block; border-top: 1px solid var(--bl-line); }
.bl-options > .bl-muted { padding: 8px 0 0; font-size: 13px; margin: 0; }
.bl-option { display: flex; align-items: flex-start; gap: 14px; padding: 13px 10px; border-bottom: 1px solid var(--bl-line-soft); cursor: pointer; }
.bl-option:hover { background: #FBFAF6; }
.bl-option input { position: absolute; opacity: 0; width: 0; height: 0; }
.bl-option__key { flex: none; width: 30px; height: 30px; display: grid; place-items: center; border: 1px solid var(--bl-green); color: var(--bl-green); font-family: var(--bl-display); font-weight: 800; font-size: 13px; }
.bl-option__text { padding-top: 4px; }
.bl-option.is-selected { background: var(--bl-green-tint); }
.bl-option.is-selected .bl-option__key { background: var(--bl-green); color: var(--bl-white); }
.bl-essay { min-height: 200px; resize: vertical; }
.bl-exam__nav { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 16px; }
.bl-exam__saved { font-size: 12.5px; }
.bl-exam__palette { position: sticky; top: 84px; }
.bl-palette { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; margin: 12px 0; }
.bl-palette__dot { width: 100%; aspect-ratio: 1; display: grid; place-items: center; border: 1px solid var(--bl-line); background: var(--bl-white); color: var(--bl-green); font-family: var(--bl-display); font-weight: 700; font-size: 12px; cursor: pointer; }
.bl-palette__dot.is-answered { background: var(--bl-green); border-color: var(--bl-green); color: var(--bl-white); }
.bl-palette__dot.is-current { outline: 2px solid var(--bl-accent); outline-offset: -2px; }
.bl-palette__legend { list-style: none; padding: 0; margin: 0 0 14px; font-size: 12.5px; color: var(--bl-gray); display: grid; gap: 6px; }
.bl-palette__legend li { display: flex; align-items: center; gap: 8px; }
.bl-palette__legend .bl-palette__dot { width: 16px; height: 16px; aspect-ratio: auto; }
.bl-overlay { position: fixed; inset: 0; z-index: 120; display: none; place-items: center; background: rgba(30, 40, 34, .7); padding: 20px; }
.bl-overlay.is-open { display: grid; }
.bl-overlay__box { width: min(100%, 460px); background: var(--bl-white); border: 1px solid var(--bl-green); outline: 1px solid var(--bl-green); outline-offset: 3px; padding: 32px; text-align: center; }
.bl-overlay__box--warn { border-color: var(--bl-error); outline-color: var(--bl-error); }
.bl-overlay__icon { font-size: 30px; color: var(--bl-green); margin-bottom: 12px; }
.bl-overlay__box--warn .bl-overlay__icon { color: var(--bl-error); }
.bl-overlay__actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ------------------------------ Bài test: kết quả ------------------------------ */
.bl-result__summary { display: grid; grid-template-columns: 200px 1fr; gap: 40px; align-items: center; padding: 36px; }
.bl-result__pending { text-align: center; grid-column: 1 / -1; }
.bl-result__pending .fa { font-size: 30px; color: var(--bl-green); margin-bottom: 10px; }
.bl-result__stamp { display: grid; place-items: center; }
.bl-result__body .bl-facts { margin: 14px 0 22px; }
.bl-result__actions { display: flex; gap: 12px; flex-wrap: wrap; }
.bl-result__review { margin-top: 36px; display: grid; gap: 14px; }
.bl-review { border-left: 3px solid var(--bl-line); }
.bl-review.is-correct { border-left-color: var(--bl-green); }
.bl-review.is-wrong { border-left-color: var(--bl-error); }
.bl-review__options { list-style: none; padding: 0; margin: 0; }
.bl-review__options li { display: flex; align-items: flex-start; gap: 12px; padding: 9px 0; border-bottom: 1px solid var(--bl-line-soft); }
.bl-review__options li.is-correct { color: var(--bl-green); font-weight: 600; }
.bl-review__options li.is-correct .bl-option__key { background: var(--bl-green); color: var(--bl-white); }
.bl-review__options li.is-chosen:not(.is-correct) { color: var(--bl-error); }
.bl-review__options li.is-chosen:not(.is-correct) .bl-option__key { border-color: var(--bl-error); color: var(--bl-error); }
.bl-review__options .fa { margin-left: auto; padding-top: 6px; }
.bl-review__essay { border: 1px solid var(--bl-line); padding: 14px; background: #FBFAF6; }
.bl-review__note { margin: 10px 0 0; font-size: 14px; }
.bl-review__explain { margin: 12px 0 0; padding-top: 10px; border-top: 1px dashed var(--bl-line); font-size: 14px; }
.bl-review__explain .fa { color: var(--bl-wood); }

/* ------------------------------ Trình đọc tài liệu ------------------------------ */
.bl-body--reader { background: #ECE9E2; }
.bl-body--reader .bl-main, .bl-body--exam .bl-main { padding-top: 0; }
.bl-reader__bar { position: sticky; top: var(--bl-header-h); z-index: 40; background: var(--bl-white); border-bottom: 1px solid var(--bl-green); }
.bl-reader__bar-inner { display: flex; align-items: center; gap: 16px; padding-top: 10px; padding-bottom: 10px; }
.bl-reader__back { display: inline-flex; align-items: center; gap: 6px; font-family: var(--bl-display); font-weight: 700; font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--bl-green); white-space: nowrap; }
.bl-reader__title { flex: 1; min-width: 0; }
.bl-reader__title strong { display: block; color: var(--bl-ink); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-weight: 600; }
.bl-reader__tools { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.bl-reader__chip { padding: 6px 12px; border: 1px solid var(--bl-line); color: var(--bl-green); font-family: var(--bl-display); font-weight: 700; font-size: 12px; font-variant-numeric: tabular-nums; white-space: nowrap; }
.bl-reader__saved { font-family: var(--bl-font); font-size: 11px; font-weight: 500; color: var(--bl-gray); margin-left: 4px; }
.bl-reader__progress { height: 3px; background: var(--bl-line-soft); }
.bl-reader__progress span { display: block; height: 100%; width: 0; background: var(--bl-wood); transition: width .4s ease; }
.bl-reader__stage { padding: 24px 16px 8px; }
.bl-pages { --zoom: 1; margin: 0 auto; width: min(100%, calc(860px * var(--zoom))); display: grid; gap: 18px; }
.bl-page { position: relative; width: 100%; background: var(--bl-white); border: 1px solid var(--bl-line); overflow: hidden; }
.bl-page canvas { display: block; width: 100%; height: 100%; pointer-events: none; }
.bl-page::before { content: attr(data-page); position: absolute; right: 10px; bottom: 8px; z-index: 1; font-family: var(--bl-display); font-size: 10px; font-weight: 700; letter-spacing: .1em; color: var(--bl-gray); background: rgba(255, 255, 255, .9); padding: 2px 8px; border: 1px solid var(--bl-line-soft); }
.bl-page.is-loading::after { content: ''; position: absolute; inset: 0; background: #F6F3EB; }
.bl-reader__hint { text-align: center; font-size: 13px; margin: 18px auto 0; max-width: 680px; }
.bl-reader__nav { display: flex; justify-content: space-between; gap: 12px; margin-top: 18px; }
.bl-reader__nav .bl-btn { max-width: 48%; white-space: normal; }
.bl-reader__nav .bl-btn .fa { flex: none; }
/* Tên bài dài: tối đa 2 dòng, hết chỗ thì có dấu ba chấm (tên đầy đủ ở thuộc tính title). */
.bl-reader__nav-text { display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; overflow: hidden; min-width: 0; text-align: center; }
.bl-video { position: relative; max-width: 960px; margin: 0 auto; overflow: hidden; background: #000; border: 1px solid var(--bl-green); }
.bl-video video { display: block; width: 100%; max-height: 72vh; }
/* Bài gộp video + tài liệu, khối "Làm bài test" của bài (D108) */
.bl-reader__label { max-width: 860px; margin: 22px auto 10px; text-align: center; font-family: var(--bl-display); font-weight: 700; font-size: 13px; letter-spacing: .08em; text-transform: uppercase; color: var(--bl-green); }
.bl-reader__test { display: grid; grid-template-columns: auto 1fr auto; gap: 12px; align-items: center; max-width: 860px; margin: 18px auto 0; padding: 12px 14px; background: var(--bl-white); border: 2px solid var(--bl-green); border-radius: 12px; }
.bl-reader__test b { display: block; font-weight: 600; line-height: 1.35; }
.bl-reader__test .bl-swatch { width: 40px; height: 52px; font-size: 13px; }
.bl-doorqc { margin-top: 20px; padding: 20px; }
.bl-doorqc__title { display: flex; align-items: center; gap: 10px; font-size: 20px; color: var(--bl-green); margin: 6px 0 6px; }
.bl-doorqc__title--fail { color: var(--bl-error); }
.bl-doorqc__title .bl-qc { flex: none; }
.bl-doorqc .bl-result__actions { margin-top: 12px; }
.bl-exam-intro__door { margin: -4px 0 14px; font-size: 14px; }
.bl-video__wm { position: absolute; top: 12%; left: 8%; pointer-events: none; color: rgba(255, 255, 255, .35); font-weight: 700; font-size: 14px; letter-spacing: .04em; text-shadow: 0 1px 2px rgba(0, 0, 0, .4); transition: top 1.2s ease, left 1.2s ease; }

/* ------------------------------ Chống sao chép (guard) ------------------------------ */
body[data-guard] { -webkit-user-select: none; user-select: none; -webkit-touch-callout: none; }
body[data-guard] textarea, body[data-guard] input { -webkit-user-select: text; user-select: text; }
body[data-guard] canvas, body[data-guard] img, body[data-guard] video { -webkit-user-drag: none; }
.bl-shield { position: fixed; inset: 0; z-index: 150; display: none; place-items: center; background: rgba(30, 40, 34, .96); padding: 24px; }
body.is-shielded .bl-shield { display: grid; }
.bl-shield__box { color: var(--bl-white); text-align: center; font-weight: 600; max-width: 520px; }
.bl-shield__box .fa { font-size: 36px; color: var(--bl-sand); margin-bottom: 12px; }
body.is-shielded .bl-pages, body.is-shielded .bl-video, body.is-shielded .bl-exam__questions { visibility: hidden; }

@media print {
    body * { display: none !important; }
    body::after { content: 'Tài liệu nội bộ BLUEWOOD - không được in hoặc lưu.'; display: block; padding: 40px; font: 700 18px sans-serif; }
}
@media (prefers-reduced-motion: reduce) {
    .bl-stamp.is-fresh { animation: none; }
    .bl-reader__progress span, .bl-video__wm { transition: none; }
}

/* ------------------------------ Nhận diện BLUEWOOD ------------------------------ */
body.bl-body { font-size: 16px; line-height: 1.5; }
.bl-eyebrow { font-size: 12px; letter-spacing: 0; text-transform: none; color: var(--bl-wood); }
.bl-eyebrow--muted { color: var(--bl-gray); }
.bl-page-title { font-family: var(--bl-serif); font-weight: 600; font-size: 34px; letter-spacing: 0; line-height: 1.18; }
.bl-rule { display: none; }
.bl-section-label span { font-size: 14px; font-weight: 800; letter-spacing: 0; text-transform: none; color: var(--bl-ink); }
.bl-section-label::after { background: var(--bl-line); }
.bl-header { border-bottom-color: var(--bl-line); }
.bl-header__logo { height: 42px; margin-left: -6px; }
.bl-nav { margin-left: auto; gap: 24px; }
.bl-nav__link { font-size: 14px; font-weight: 600; letter-spacing: 0; text-transform: none; color: var(--bl-ink); padding: 19px 0 15px; border-bottom-width: 3px; }
.bl-nav__link.is-active { color: var(--bl-green); border-bottom-color: var(--bl-green); }
.bl-user { margin-left: 8px; }
.bl-user__avatar { width: 36px; height: 36px; border-radius: 50%; background: var(--bl-sand); color: var(--bl-ink); font-size: 14px; }
.bl-user > .bl-user__name { display: none; }
.bl-user__logout { color: var(--bl-ink); font-weight: 600; letter-spacing: 0; text-transform: none; font-size: 13px; }
.bl-btn { min-height: 48px; font-size: 14px; font-weight: 800; letter-spacing: 0; border-color: var(--bl-line); color: var(--bl-ink); }
.bl-btn:hover { background: var(--bl-paper); }
.bl-btn--sm { min-height: 36px; font-size: 12px; }
.bl-btn--accent, .bl-btn--primary { background: var(--bl-green); border-color: var(--bl-green); color: var(--bl-white); }
.bl-btn--accent:hover, .bl-btn--primary:hover { background: var(--bl-moss); border-color: var(--bl-moss); }
.bl-btn--sand { background: var(--bl-sand); border-color: var(--bl-sand); }
.bl-btn--sand:hover { background: #DFCDA6; }
.bl-card { border-radius: 12px; }
.bl-card--frame, .bl-auth__card, .bl-overlay__box { border-color: var(--bl-line); outline: 0; border-radius: 12px; }
.bl-input { min-height: 48px; }
.bl-badge { letter-spacing: 0; text-transform: none; font-size: 12.5px; }
.bl-table-wrap, .bl-ledger { border-radius: 10px; }
.bl-question, .bl-video { border-radius: 10px; }
.bl-option__key, .bl-palette__dot { border-radius: 6px; }
/* Đăng nhập: bản vẽ dãy tủ trên nền xanh, các cánh gỗ lắp dần khi mở trang; form trên nền kem. */
.bl-body--login .bl-main { display: block; min-height: 100vh; padding: 0; background: var(--bl-paper); }
.bl-login { min-height: 100vh; display: grid; grid-template-rows: auto 1fr; }
.bl-login__art { background-color: var(--bl-green); color: var(--bl-white); padding: 18px 20px 42px; background-image: linear-gradient(rgba(255, 255, 255, .055) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, .055) 1px, transparent 1px); background-size: 24px 24px; }
.bl-login__logo { display: block; height: 24px; width: auto; align-self: flex-start; }
.bl-login__line { font-family: var(--bl-serif); font-weight: 600; font-size: 25px; line-height: 1.2; margin: 14px 0 12px; }
.bl-login__foot { display: none; }
.bl-ld { --bl-ld-line: rgba(255, 255, 255, .88); }
.bl-ld-chain { display: flex; height: 20px; font-family: var(--bl-display); font-weight: 600; font-size: 10px; line-height: 14px; }
.bl-ld-chain span { flex: var(--m) 1 0; min-width: 0; text-align: center; position: relative; border-bottom: 1px solid var(--bl-ld-line); }
.bl-ld-chain span::before, .bl-ld-chain span:last-child::after { content: ''; position: absolute; bottom: -4px; width: 1px; height: 9px; background: var(--bl-ld-line); transform: rotate(35deg); }
.bl-ld-chain span::before { left: 0; }
.bl-ld-chain span:last-child::after { right: 0; }
.bl-ld-top { height: 11px; margin: 6px -3px 0; border: 1px dashed rgba(255, 255, 255, .6); }
.bl-ld-run { display: flex; height: 92px; border: 2px solid var(--bl-ld-line); border-top: 0; }
.bl-ld-door { flex: var(--m) 1 0; min-width: 0; position: relative; border-left: 1px solid var(--bl-ld-line); background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100' preserveAspectRatio='none'%3E%3Cpath d='M0 0L100 50L0 100' fill='none' stroke='%23FFFFFF' stroke-opacity='.5' stroke-width='1' stroke-dasharray='5 4' vector-effect='non-scaling-stroke'/%3E%3C/svg%3E") center / 100% 100% no-repeat; }
.bl-ld-door:first-child { border-left: 0; }
.bl-ld-door::before { content: ''; position: absolute; top: 9%; right: 8%; width: 2px; height: 20%; background: rgba(255, 255, 255, .6); }
.bl-ld-door.is-on { background: var(--bl-oak) center / cover; animation: bl-ld-in .45s ease-out both; animation-delay: calc(var(--i) * 130ms + 150ms); }
.bl-ld-door.is-on::before { background: var(--bl-ink); }
@keyframes bl-ld-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.bl-ld-toe { height: 7px; margin: 0 6px; background: var(--bl-ld-line); }
.bl-ld-total { display: flex; align-items: center; gap: 8px; margin-top: 6px; font-family: var(--bl-display); font-weight: 600; font-size: 10px; }
.bl-ld-total::before, .bl-ld-total::after { content: ''; flex: 1; height: 1px; background: rgba(255, 255, 255, .6); }
.bl-login__panel { position: relative; margin-top: -22px; padding: 24px 20px 28px; display: flex; justify-content: center; background: var(--bl-paper); border-radius: 18px 18px 0 0; }
.bl-login__form { width: min(100%, 400px); }
.bl-login__title { font-family: var(--bl-serif); font-weight: 600; font-size: 32px; letter-spacing: 0; line-height: 1.15; margin: 0 0 2px; }
.bl-login__sub { color: var(--bl-gray); margin: 0 0 18px; }
.bl-login__error { margin: 0 0 16px; padding: 10px 12px; background: var(--bl-error-tint); color: var(--bl-error); border-radius: 10px; font-size: 14.5px; }
.bl-login .bl-field { margin-bottom: 14px; }
.bl-login .bl-field__label { font-family: var(--bl-font); font-weight: 600; font-size: 14px; letter-spacing: 0; text-transform: none; color: var(--bl-ink); }
.bl-login .bl-input { height: 52px; min-height: 52px; font-size: 16px; border-color: #CFCBC2; }
.bl-login .bl-input:focus { border-color: var(--bl-green); box-shadow: 0 0 0 3px rgba(31, 94, 58, .15); }
.bl-login .bl-input::placeholder { color: #8F8F8F; }
.bl-login__go { min-height: 52px; margin-top: 4px; font-size: 15px; }
.bl-login__help { margin: 12px 0 0; font-size: 13.5px; line-height: 1.45; color: var(--bl-gray); }
@media (min-width: 992px) {
    .bl-login { grid-template-columns: minmax(0, 1.25fr) minmax(480px, 1fr); grid-template-rows: none; }
    .bl-login__art { display: flex; flex-direction: column; padding: 36px clamp(40px, 5vw, 88px); background-size: 28px 28px; }
    .bl-login__logo { height: 34px; }
    .bl-login__mid { margin: auto 0; width: 100%; max-width: 680px; }
    .bl-login__line { font-size: clamp(36px, 3.1vw, 54px); margin: 0 0 36px; }
    .bl-ld-chain { height: 26px; font-size: 12px; line-height: 18px; }
    .bl-ld-top { height: 16px; margin-top: 8px; }
    .bl-ld-run { height: 230px; }
    .bl-ld-toe { height: 12px; margin: 0 10px; }
    .bl-ld-total { font-size: 12px; margin-top: 10px; }
    .bl-login__foot { display: block; font-size: 13px; color: rgba(255, 255, 255, .78); }
    .bl-login__panel { margin: 0; padding: 40px; align-items: center; border-radius: 0; }
    .bl-login__title { font-size: 38px; }
}
@media (prefers-reduced-motion: reduce) { .bl-ld-door.is-on { animation: none; } }

/* Tem tròn dán lên sản phẩm (kết quả bài test) */
.bl-stamp { width: 96px; height: 96px; border-radius: 50%; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; background: var(--bl-green); color: var(--bl-white); font-family: var(--bl-display); box-shadow: inset 0 0 0 4px var(--bl-green), inset 0 0 0 5px rgba(255, 255, 255, .75); }
.bl-stamp b { font-weight: 800; font-size: 15px; line-height: 1.05; padding: 0 8px; }
.bl-stamp i { font-style: normal; font-weight: 700; font-size: 10px; margin-top: 3px; }
.bl-stamp small { font-weight: 600; font-size: 10px; margin-top: 2px; }
.bl-stamp--fail { background: var(--bl-error); box-shadow: inset 0 0 0 4px var(--bl-error), inset 0 0 0 5px rgba(255, 255, 255, .75); }
.bl-stamp--square { background: var(--bl-sand); color: var(--bl-ink); box-shadow: none; }
.bl-stamp--big { width: 150px; height: 150px; }
.bl-stamp--big b { font-size: 24px; }
.bl-stamp--big i { font-size: 12px; }
.bl-stamp--big small { font-size: 11px; }
.bl-stamp.is-fresh { animation: bl-stamp-in .22s ease-out; }
@keyframes bl-stamp-in { from { transform: scale(1.15); opacity: 0; } to { transform: scale(1); opacity: 1; } }

/* ------------------------------ Trang khoá học ------------------------------ */
.bl-body--course .bl-main { padding-top: 0; }
/* Ảnh công trình + tấm tên khoá như trang catalogue */
.bl-cover { margin: 0; position: relative; }
.bl-cover img { display: block; width: 100%; height: 170px; object-fit: cover; object-position: 68% 55%; }
.bl-plate { position: relative; max-width: 1132px; margin: -34px 14px 0; padding: 14px 16px 2px; background: var(--bl-paper); border-radius: 12px 12px 0 0; }
.bl-plate__name { font-family: var(--bl-serif); font-weight: 600; font-size: 28px; line-height: 1.18; letter-spacing: 0; margin: 4px 0 0; }
.bl-layout { margin-top: 16px; }

/* Bản vẽ mặt đứng dãy tủ */
.bl-sheet { background: var(--bl-white); border: 1px solid var(--bl-line); border-radius: 12px; padding: 14px 14px 0; overflow: hidden; }
.bl-sheet--compact { padding-bottom: 12px; margin-bottom: 14px; }
.bl-sheet__title { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 2px 10px; margin-bottom: 8px; }
.bl-sheet__big { font-family: var(--bl-display); font-weight: 800; font-size: 20px; line-height: 1.2; color: var(--bl-green); white-space: nowrap; }
.bl-sheet__small { font-size: 14px; white-space: nowrap; }
.bl-sheet__note { margin: 0 -14px; padding: 10px 14px; background: var(--bl-paper); border-top: 1px solid var(--bl-line); font-size: 14px; }
.bl-cab { padding: 0 4px; }
/* Chuỗi kích thước: mỗi đoạn dài theo số phút của bài */
.bl-chain { display: flex; height: 24px; font-family: var(--bl-display); font-weight: 700; font-size: 11px; line-height: 18px; }
.bl-chain span { flex: var(--m) 1 0; min-width: 0; text-align: center; position: relative; border-bottom: 1px solid var(--bl-ink); }
.bl-chain span::before, .bl-chain span:last-child::after { content: ''; position: absolute; bottom: -5px; width: 1px; height: 11px; background: var(--bl-ink); transform: rotate(35deg); }
.bl-chain span::before { left: 0; }
.bl-chain span:last-child::after { right: 0; }
/* Mặt đá = bài kiểm tra */
.bl-counter { position: relative; margin: 8px -4px 0; min-height: 30px; padding: 3px 8px; display: flex; align-items: center; justify-content: center; text-align: center; font-family: var(--bl-display); font-weight: 700; font-size: 12px; line-height: 1.2; border: 1px dashed #9A9A9A; border-radius: 2px; background: var(--bl-white); }
.bl-counter.is-open { border: 2px solid var(--bl-green); color: var(--bl-green); }
.bl-counter.is-done, .bl-counter.is-fail, .bl-counter.is-pending { border: 1px solid var(--bl-ink); background: var(--bl-stone); padding-right: 64px; padding-left: 64px; }
.bl-counter .bl-qc { position: absolute; right: 8px; top: -14px; width: 56px; height: 56px; font-size: 11px; line-height: 1.1; text-align: center; z-index: 1; }
.bl-run { display: flex; height: 148px; border: 2px solid var(--bl-ink); border-top: 0; background: var(--bl-white); }
.bl-run--upper { height: 92px; }
.bl-door { flex: var(--m) 1 0; min-width: 0; position: relative; border-left: 1px solid var(--bl-ink); display: flex; align-items: flex-end; justify-content: center; padding-bottom: 7px; font-family: var(--bl-display); font-weight: 800; font-size: 12px; background: var(--bl-swing) center / 100% 100% no-repeat; color: #707070; }
.bl-door:first-child { border-left: 0; }
.bl-door::before { content: ''; position: absolute; top: 12px; right: 4px; width: 3px; height: 26px; background: #9A9A9A; border-radius: 2px; }
.bl-door.is-done { background: var(--bl-oak) center / cover; color: var(--bl-ink); }
.bl-door.is-done::before { background: var(--bl-ink); }
.bl-run--upper .bl-door.is-done { background: #FBFAF6; }
.bl-door.is-now { background: var(--bl-white); color: var(--bl-green); box-shadow: inset 0 0 0 3px var(--bl-green); }
.bl-door.is-now::before { background: var(--bl-green); }
/* Test bài học (D108): học xong = cánh đưa tới (gỗ nhạt) chờ test; test đạt = cánh lắp (is-done) + tem QC */
.bl-door.is-learned, .bl-door.is-pending, .bl-door.is-fail { background: linear-gradient(rgba(255, 255, 255, .62), rgba(255, 255, 255, .62)), var(--bl-oak) center / cover; color: var(--bl-ink); }
.bl-door.is-fail { color: var(--bl-error); }
.bl-door.is-focus { box-shadow: inset 0 0 0 3px var(--bl-green); }
.bl-door__mark { position: absolute; top: 46%; left: 50%; transform: translate(-50%, -50%); width: min(30px, calc(100% - 6px)); aspect-ratio: 1; border-radius: 50%; display: grid; place-items: center; background: var(--bl-green); color: var(--bl-white); font-size: 10px; font-weight: 800; line-height: 1; box-shadow: inset 0 0 0 2px var(--bl-green), inset 0 0 0 3px rgba(255, 255, 255, .75); }
.bl-door__mark--fail { background: var(--bl-error); box-shadow: inset 0 0 0 2px var(--bl-error), inset 0 0 0 3px rgba(255, 255, 255, .75); }
.bl-door__mark--wait { background: var(--bl-white); color: var(--bl-green); box-shadow: none; border: 1.5px dashed var(--bl-green); }
.bl-legend { display: flex; flex-wrap: wrap; gap: 4px 16px; list-style: none; margin: 0 0 10px; padding: 0; font-size: 13px; }
.bl-legend li { display: flex; align-items: center; gap: 6px; }
.bl-legend .bl-door__mark { position: static; transform: none; width: 22px; font-family: var(--bl-display); font-size: 9px; }
.bl-splash { height: 34px; background: #ECE9E2; border-left: 2px solid var(--bl-ink); border-right: 2px solid var(--bl-ink); }
.bl-splash + .bl-counter { margin-top: 0; }
.bl-toe { height: 10px; margin: 0 8px; background: var(--bl-ink); }
.bl-total { display: flex; align-items: center; gap: 8px; margin: 8px 0 12px; font-family: var(--bl-display); font-weight: 700; font-size: 12px; white-space: nowrap; }
.bl-total::before, .bl-total::after { content: ''; flex: 1; height: 1px; background: var(--bl-ink); }

/* Việc tiếp theo */
.bl-nextcard { display: grid; grid-template-columns: auto 1fr; gap: 12px; align-items: center; background: var(--bl-white); border: 1px solid var(--bl-line); border-radius: 12px; padding: 12px; margin-top: 14px; }
.bl-nextcard b { display: block; font-weight: 600; line-height: 1.3; }
.bl-nextcard small { font-size: 14px; color: var(--bl-green); font-weight: 600; }
.bl-nextcard__go { display: none; }
.bl-nextcard .bl-swatch { width: 44px; height: 58px; font-size: 12px; }
.bl-dock { position: sticky; bottom: calc(58px + env(safe-area-inset-bottom)); z-index: 45; margin-top: 14px; padding: 8px 14px; background: var(--bl-white); border-top: 1px solid var(--bl-line); }
.bl-dock .bl-btn { width: 100%; }

/* Danh sách bài */
.bl-rows { background: var(--bl-white); border: 1px solid var(--bl-line); border-radius: 12px; margin: 14px 0 0; overflow: hidden; }
.bl-group { padding: 8px 12px; background: var(--bl-paper); border-top: 1px solid var(--bl-line); font-family: var(--bl-display); font-weight: 800; font-size: 13px; }
.bl-group:first-child { border-top: 0; }
.bl-group em { font-family: var(--bl-font); font-style: normal; font-weight: 400; margin-left: 6px; }
.bl-row { display: grid; grid-template-columns: 34px 1fr 40px; column-gap: 12px; align-items: center; min-height: 66px; padding: 8px 12px; border-top: 1px solid var(--bl-line); color: inherit; }
.bl-row:first-child { border-top: 0; }
a.bl-row:hover { background: #FBFAF6; }
.bl-row b { display: block; font-weight: 600; line-height: 1.3; }
.bl-row small { display: block; font-size: 14px; color: var(--bl-gray); margin-top: 2px; }
.bl-row.is-now, a.bl-row.is-now:hover { background: var(--bl-green-tint); }
.bl-row.is-now small { color: var(--bl-green); font-weight: 600; }
.bl-row.is-off b { color: var(--bl-gray); font-weight: 400; }
.bl-row--exam, a.bl-row--exam:hover { background: var(--bl-sand); }
.bl-row--exam small { color: var(--bl-ink); }
.bl-row--exam b { font-family: var(--bl-display); font-weight: 800; font-size: 15px; line-height: 1.25; }
.bl-row__fail { color: var(--bl-error); font-weight: 600; }
/* Dòng test của bài (D108), thụt vào dưới bài */
.bl-row--sub { min-height: 54px; padding-left: 26px; border-top-style: dashed; }
.bl-row--sub b { font-size: 14px; }
.bl-row--sub.is-now, a.bl-row--sub.is-now:hover { background: var(--bl-green-tint); box-shadow: inset 4px 0 0 var(--bl-green); }
.bl-row--sub .bl-swatch { width: 34px; height: 34px; font-size: 10px; letter-spacing: -.02em; }
.bl-row--sub .bl-qc .fa, .bl-doorqc__title .bl-qc .fa { font-size: 16px; }
.bl-row__check { justify-self: center; font-size: 18px; color: var(--bl-green); }
.bl-swatch { width: 34px; height: 44px; border: 1.5px solid var(--bl-ink); border-radius: 2px; display: grid; place-items: center; font-family: var(--bl-display); font-weight: 800; font-size: 12px; color: #707070; background: var(--bl-swing) center / 100% 100% no-repeat; }
.bl-swatch.is-done { background: var(--bl-oak) center / cover; color: var(--bl-ink); }
.bl-swatch.is-now { background: var(--bl-white); color: var(--bl-green); border: 2.5px solid var(--bl-green); }
.bl-swatch.is-stone { background: var(--bl-white); }
.bl-swatch.is-learned, .bl-swatch.is-pending, .bl-swatch.is-fail { background: linear-gradient(rgba(255, 255, 255, .62), rgba(255, 255, 255, .62)), var(--bl-oak) center / cover; color: var(--bl-ink); }
.bl-swatch.is-fail { border-color: var(--bl-error); color: var(--bl-error); }
/* Tem QC tròn */
.bl-qc { width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center; background: var(--bl-green); color: var(--bl-white); font-family: var(--bl-display); font-weight: 800; font-size: 12px; box-shadow: inset 0 0 0 2px var(--bl-green), inset 0 0 0 3px rgba(255, 255, 255, .75); }
.bl-qc--fail { background: var(--bl-error); box-shadow: inset 0 0 0 2px var(--bl-error), inset 0 0 0 3px rgba(255, 255, 255, .75); }
.bl-goals { margin-top: 14px; padding: 10px 14px; background: var(--bl-white); border: 1px solid var(--bl-line); border-radius: 10px; font-size: 15px; }
.bl-goals summary { cursor: pointer; font-weight: 600; }
.bl-goals ul { margin: 8px 0 0; padding-left: 20px; }

/* Đạt: bản vẽ thành công trình thật */
.bl-cover--done img { height: 280px; object-position: 60% 45%; }
.bl-seal-wrap { position: absolute; left: 0; right: 0; bottom: -44px; }
.bl-seal { width: 148px; height: 148px; border-radius: 50%; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; background: var(--bl-green); color: var(--bl-white); box-shadow: inset 0 0 0 5px var(--bl-green), inset 0 0 0 7px rgba(255, 255, 255, .8), 0 0 0 5px var(--bl-paper); }
.bl-cover .bl-seal img { width: 62px; height: 22px; object-fit: contain; }
.bl-seal strong { font-family: var(--bl-display); font-weight: 800; font-size: 26px; line-height: 1.05; margin-top: 6px; }
.bl-seal span { font-family: var(--bl-display); font-weight: 800; font-size: 10.5px; line-height: 1.2; margin-top: 4px; }
.bl-plate--done { background: transparent; margin-top: 56px; padding-top: 0; }
.bl-plate--done p { margin: 6px 0 0; max-width: 56ch; }
.bl-plate.bl-plate--done { margin-left: 0; margin-right: 0; padding-left: 0; padding-right: 0; }

/* Kết luận bài kiểm tra */
.bl-verdict { margin-bottom: 14px; padding: 12px 14px; background: var(--bl-white); border: 1px solid var(--bl-error); border-radius: 10px; }
.bl-verdict b { display: block; font-family: var(--bl-display); font-weight: 800; font-size: 17px; line-height: 1.3; color: var(--bl-error); }

@media (min-width: 992px) {
    .bl-cover img { height: 300px; }
    .bl-plate { margin: -64px auto 0; padding: 18px 24px 4px; }
    .bl-plate__name { font-size: 40px; }
    .bl-layout { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); column-gap: 20px; align-items: start; }
    .bl-layout > .bl-sheet, .bl-layout > .bl-rows, .bl-layout > .bl-goals { grid-column: 1; }
    .bl-layout > .bl-nextcard { grid-column: 2; grid-row: 1 / span 2; margin-top: 0; position: sticky; top: calc(var(--bl-header-h) + 16px); }
    .bl-run { height: 190px; }
    .bl-run--upper { height: 110px; }
    .bl-nextcard__go { display: flex; grid-column: 1 / -1; }
    .bl-dock { display: none; }
    .bl-cover--done img { height: 400px; }
    .bl-plate--done { margin-top: 62px; }
}

.bl-reader__complete-error { flex-basis: 100%; text-align: right; font-size: 13px; }
.bl-reader__back { letter-spacing: 0; text-transform: none; font-size: 14px; }

/* ------------------------------ Responsive ------------------------------ */
@media (max-width: 1200px) {
    .bl-user > .bl-user__name { max-width: 140px; }
    .bl-install span { display: none; }
}
@media (max-width: 1080px) {
    .bl-courses, .bl-testgrid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 991.98px) {
    :root { --bl-header-h: 56px; }
    .bl-nav, .bl-user__name, .bl-install span { display: none; }
    .bl-header__inner { justify-content: space-between; gap: 14px; }
    .bl-main { padding-bottom: 84px; }
    .bl-footer { padding-bottom: 72px; }
    .bl-tabbar { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; position: fixed; left: 0; right: 0; bottom: 0; z-index: 60; background: var(--bl-white); border-top: 1px solid var(--bl-green); padding: 6px 4px calc(6px + env(safe-area-inset-bottom)); }
    .bl-tabbar__item { display: flex; flex-direction: column; align-items: center; gap: 3px; min-width: 0; padding: 6px 0; font-family: var(--bl-display); font-weight: 700; font-size: 10px; letter-spacing: .03em; white-space: nowrap; text-transform: uppercase; color: var(--bl-gray); border-bottom: 2px solid transparent; }
    .bl-tabbar__item .fa { font-size: 18px; }
    .bl-tabbar__item.is-active { color: var(--bl-green); border-bottom-color: var(--bl-accent); }
    .bl-tabbar__item.is-disabled { opacity: .35; cursor: default; }
    .bl-exam-intro, .bl-exam__body, .bl-profile { grid-template-columns: 1fr; }
    .bl-exam__palette { position: static; }
    .bl-palette { grid-template-columns: repeat(auto-fill, minmax(40px, 1fr)); }
    .bl-exam__nav { flex-wrap: wrap; }
    .bl-exam__nav .bl-btn { flex: 1; }
    .bl-exam__saved { order: 3; flex-basis: 100%; text-align: center; }
    .bl-result__summary { grid-template-columns: 1fr; justify-items: center; text-align: center; padding: 28px 20px; }
    .bl-result__actions { justify-content: center; }
}
@media (max-width: 640px) {
    .bl-section-label .bl-eyebrow--muted { display: none; } /* nhãn phụ không xuống dòng làm tràn ngang 390px */
    .bl-profile__info .bl-dl { grid-template-columns: minmax(0, 1fr); gap: 2px 0; }
    .bl-profile__info .bl-dl dd { margin-bottom: 10px; }
    .bl-container { padding: 0 14px; }
    .bl-page-title { font-size: 28px; }
    .bl-reader__stage:has(.bl-video) { padding: 0 0 8px; }
    .bl-reader__stage:has(.bl-video) .bl-pages { width: calc(100% - 12px); }
    .bl-video { border: 0; border-radius: 0; }
    .bl-reader__test { grid-template-columns: auto 1fr; }
    .bl-reader__test .bl-btn { grid-column: 1 / -1; width: 100%; }
    .bl-doorqc { padding: 16px 14px; }
    .bl-doorqc__title { font-size: 17px; }
    .bl-ledger th, .bl-ledger td { padding: 8px 6px; font-size: 13px; }
    .bl-courses, .bl-testgrid { grid-template-columns: 1fr; }
    .bl-next .bl-btn, .bl-assess__head .bl-btn { width: 100%; }
    .bl-reader__nav { flex-direction: column-reverse; }
    .bl-reader__nav .bl-btn { max-width: none; width: 100%; }
    .bl-factgrid { grid-template-columns: repeat(2, 1fr); }
    .bl-factgrid li:nth-child(2) { border-right: 0; }
    .bl-factgrid li:nth-child(-n+2) { border-bottom: 1px solid var(--bl-line-soft); }
    .bl-reader__bar-inner { flex-wrap: wrap; gap: 8px; }
    .bl-reader__title { order: 3; flex-basis: 100%; }
    .bl-reader__stage { padding: 14px 6px 8px; }
    .bl-question { padding: 18px; }
    .bl-exam__title .bl-eyebrow { display: none; }
    .bl-timer { font-size: 18px; }
    .bl-table thead { display: none; }
    .bl-table tr { display: block; border-top: 1px solid var(--bl-line); padding: 8px 0; }
    .bl-table td { display: flex; justify-content: space-between; gap: 12px; border: 0; padding: 6px 16px; }
    .bl-table td[data-label]::before { content: attr(data-label); color: var(--bl-gray); font-weight: 600; }
    .bl-profile__info { flex-direction: column; }
    .bl-auth__card { padding: 24px 20px; }
}