/* Lab guides: shared by the web reader, the print layout and the chapter editor */
.guide-body { --g-accent: #0f766e; --g-ink: #0f172a; --g-mute: #475569; color: var(--g-ink); line-height: 1.62; font-size: 15.5px; }
.guide-body h2 { font-size: 1.32em; margin: 1.5em 0 .5em; color: var(--g-ink); letter-spacing: -.01em; padding-bottom: .25em; border-bottom: 2px solid #e2e8f0; }
.guide-body h3 { font-size: 1.08em; margin: 1.2em 0 .35em; color: var(--g-accent); }
.guide-body p { margin: .55em 0; }
.guide-body ul { margin: .5em 0 .8em 1.2em; padding: 0; } .guide-body li { margin: .28em 0; }
.guide-body ol { list-style: none; counter-reset: gstep; margin: .6em 0 .9em; padding: 0; }
.guide-body ol > li { counter-increment: gstep; position: relative; padding: .1em 0 .1em 2.3em; margin: .42em 0; }
.guide-body ol > li::before { content: counter(gstep); position: absolute; left: 0; top: .08em; width: 1.6em; height: 1.6em; border-radius: 50%; background: var(--g-accent); color: #fff; font-size: .82em; font-weight: 700; display: flex; align-items: center; justify-content: center; }
.guide-body b, .guide-body strong { color: #0b1220; }
.guide-body table { width: 100%; border-collapse: collapse; margin: .8em 0 1em; font-size: .93em; break-inside: auto; }
.guide-body th { background: #f1f5f9; text-align: left; padding: .5em .6em; border-bottom: 2px solid #cbd5e1; font-weight: 700; }
.guide-body td { padding: .48em .6em; border-bottom: 1px solid #e2e8f0; vertical-align: top; }
.guide-body tr { break-inside: avoid; }
.g-tip, .g-note, .g-warn { border-radius: 10px; padding: .7em 1em; margin: .9em 0; break-inside: avoid; border-left: 5px solid; }
.g-tip p, .g-note p, .g-warn p { margin: .2em 0; }
.g-tip { background: #f0fdfa; border-color: #14b8a6; } .g-note { background: #eff6ff; border-color: #3b82f6; } .g-warn { background: #fff7ed; border-color: #f97316; }
.g-tip::before { content: "TIP"; } .g-note::before { content: "GOOD TO KNOW"; } .g-warn::before { content: "IMPORTANT"; }
.g-tip::before, .g-note::before, .g-warn::before { display: block; font-size: .7em; font-weight: 800; letter-spacing: .09em; opacity: .75; margin-bottom: .15em; }
.g-fig { margin: 1em 0 1.1em; break-inside: avoid; text-align: center; }
.g-fig img { max-width: 100%; max-height: 118mm; border-radius: 10px; border: 1px solid #e2e8f0; box-shadow: 0 6px 22px rgba(15,23,42,.13); }
.g-fig.wide img { max-height: 34mm; } .g-fig.tall img { max-height: 200mm; }
.g-fig figcaption { font-size: .82em; color: var(--g-mute); margin-top: .5em; font-style: italic; }
.g-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 10px; margin: 1em 0; }
.g-card { border: 1px solid #e2e8f0; border-top: 4px solid var(--g-accent); border-radius: 10px; padding: .7em .85em; background: #fff; break-inside: avoid; }
.g-card strong { display: block; margin-bottom: .2em; } .g-card span { font-size: .88em; color: var(--g-mute); }
.g-chip { display: inline-block; padding: .05em .55em; border-radius: 99px; background: #e2e8f0; font-size: .85em; font-weight: 600; white-space: nowrap; }
.g-where { display: inline-block; font-size: .85em; background: #f1f5f9; border: 1px solid #e2e8f0; border-radius: 6px; padding: .12em .5em; color: #334155; margin-bottom: .2em; }

/* Web reader */
.gr-wrap { display: grid; grid-template-columns: 270px minmax(0, 1fr); gap: 34px; align-items: start; }
.gr-toc { position: sticky; top: 92px; max-height: calc(100vh - 110px); overflow: auto; background: #fff; border: 1px solid var(--line, #e2e8f0); border-radius: 14px; padding: 14px; }
.gr-toc input { width: 100%; height: 34px; border: 1px solid var(--line, #e2e8f0); border-radius: 8px; padding: 0 10px; margin-bottom: 8px; font: inherit; font-size: 13px; }
.gr-toc .gr-part { font-size: 11px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; color: #64748b; margin: 12px 0 4px; }
.gr-toc a { display: block; padding: 5px 8px; border-radius: 7px; font-size: 13.5px; color: #1e293b; text-decoration: none; line-height: 1.3; }
.gr-toc a:hover, .gr-toc a.on { background: #f0fdfa; color: #0f766e; }
.gr-hero { color: #fff; border-radius: 18px; padding: 28px 30px; margin-bottom: 22px; background: linear-gradient(120deg, #0f172a, var(--g-hero, #0f766e)); }
.gr-hero h1 { color: #fff; margin: 4px 0 6px; } .gr-hero p { color: #dbeafe; margin: 0 0 14px; } .gr-eyebrow { font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: #5eead4; font-weight: 800; }
.gr-hero .btn { margin-right: 6px; } .gr-hero .btn-ghost { color: #fff; border: 1px solid rgba(255,255,255,.45); background: transparent; }
.gr-chap { background: #fff; border: 1px solid var(--line, #e2e8f0); border-radius: 16px; padding: 22px 28px; margin-bottom: 20px; scroll-margin-top: 90px; }
.gr-chap > h2.gr-title { font-size: 1.55rem; margin: 0 0 4px; border: 0; padding: 0; } .gr-num { color: #0f766e; font-weight: 800; font-size: 13px; letter-spacing: .06em; } .gr-intro { color: #475569; margin: 0 0 8px; }
@media (max-width: 900px) { .gr-wrap { grid-template-columns: 1fr; } .gr-toc { position: static; max-height: 260px; } .gr-chap { padding: 16px; } }

/* Guides hub */
.gh-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.gh-card { border-radius: 18px; overflow: hidden; background: #fff; border: 1px solid var(--line, #e2e8f0); box-shadow: 0 6px 24px rgba(15,23,42,.07); display: flex; flex-direction: column; }
.gh-top { color: #fff; padding: 26px 24px; background: linear-gradient(120deg, #0f172a, #0f766e); } .gh-top.adm { background: linear-gradient(120deg, #0f172a, #1e3a8a); } .gh-top h2 { color: #fff; margin: 0 0 4px; } .gh-top p { margin: 0; color: #dbeafe; font-size: 14px; }
.gh-body { padding: 18px 24px 22px; display: flex; flex-direction: column; gap: 12px; flex: 1; } .gh-btns { display: flex; gap: 8px; flex-wrap: wrap; margin-top: auto; }

/* Sign-in popup */
.gp { border: 0; padding: 0; border-radius: 20px; width: min(500px, 92vw); overflow: hidden; box-shadow: 0 30px 80px rgba(2,6,23,.45); }
.gp::backdrop { background: rgba(2,6,23,.55); backdrop-filter: blur(3px); }
.gp[open] { animation: gpIn .28s cubic-bezier(.2,.9,.3,1.2); } @keyframes gpIn { from { opacity: 0; transform: translateY(14px) scale(.97); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .gp[open] { animation: none; } }
.gp-top { position: relative; color: #fff; padding: 26px 28px 22px; background: radial-gradient(circle at 85% 10%, rgba(94,234,212,.45), transparent 45%), linear-gradient(125deg, #0f172a, #0f766e); } .gp-top.adm { background: radial-gradient(circle at 85% 10%, rgba(147,197,253,.45), transparent 45%), linear-gradient(125deg, #0f172a, #1e3a8a); }
.gp-eyebrow { font-size: 11px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; color: #5eead4; } .gp-top h2 { color: #fff; margin: 6px 0 2px; font-size: 1.45rem; }
.gp-x { position: absolute; top: 12px; right: 12px; width: 34px; height: 34px; border-radius: 50%; border: 0; cursor: pointer; background: rgba(255,255,255,.16); color: #fff; font-size: 17px; line-height: 1; } .gp-x:hover { background: rgba(255,255,255,.3); }
.gp-body { padding: 18px 28px 22px; background: #fff; color: #1e293b; font-size: 14.5px; line-height: 1.55; } .gp-body p { margin: 0 0 10px; } .gp-new { background: #f0fdfa; border: 1px solid #99f6e4; border-radius: 10px; padding: 9px 12px; margin-bottom: 12px; font-size: 13.5px; }
.gp-btns { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; } .gp-close { margin-left: auto; background: none; border: 0; color: #64748b; cursor: pointer; font: inherit; font-size: 13.5px; }

/* Admin editor */
.gd-admin { margin-bottom: 18px; } .gd-admin-head { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; } .gd-admin-btns { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; } .gd-admin-list { margin-top: 10px; } .gd-admin-list summary { cursor: pointer; color: #0f766e; font-weight: 600; font-size: 14px; }
.gd-rowbtns { white-space: nowrap; } .gd-rowbtns form { display: inline; } .gd-h3 { margin: 16px 0 4px; } .gd-steps { margin: 4px 0 10px 18px; }
.gd-pub { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; } .gd-pub label { display: grid; gap: 3px; } .gd-pub input { height: 34px; border: 1px solid var(--line, #e2e8f0); border-radius: 8px; padding: 0 8px; } .gd-grow { flex: 1 1 260px; }
.gd-form { display: grid; gap: 10px; } .gd-form > label { display: grid; gap: 3px; } .gd-form > label input { height: 36px; border: 1px solid var(--line, #e2e8f0); border-radius: 8px; padding: 0 10px; font: inherit; }
.gd-tools { display: flex; flex-wrap: wrap; gap: 4px; position: sticky; top: 8px; z-index: 5; background: #f8fafc; border: 1px solid var(--line, #e2e8f0); border-radius: 10px; padding: 6px; } .gd-tools button, .gd-imgbtn { border: 1px solid transparent; background: none; border-radius: 6px; padding: 4px 9px; cursor: pointer; font-size: 13px; } .gd-tools button:hover, .gd-imgbtn:hover { background: #e2e8f0; } .gd-tools span { width: 1px; background: #cbd5e1; margin: 2px 4px; }
.gd-edit { min-height: 420px; border: 1px solid var(--line, #e2e8f0); border-radius: 10px; padding: 18px 22px; background: #fff; outline: none; } .gd-edit:focus { border-color: #0f766e; } .gd-htmlmode { font-family: ui-monospace, Menlo, monospace; font-size: 12.5px; white-space: pre-wrap; } .gd-formbtns { display: flex; gap: 8px; }