/* ============================================================ HKB B1 Self-Paced Resource — Design System Mobile-first · 40–64 audience · container-aware · themeable All colours/sizes are CSS custom properties so HKB can rebrand without touching internals (see §10/§11 of the proposal). ============================================================ */ :root { /* Brand / theme hooks — override these to rebrand */ --b1-brand: #b3122e; /* HKB red */ --b1-brand-dark: #7d0c20; --b1-accent: #1f6feb; --b1-bg: #fbfaf7; --b1-surface: #ffffff; --b1-ink: #1c1c1c; --b1-ink-soft: #555; --b1-line: #e4e0d8; --b1-ok: #1a7f4b; --b1-warn: #c47f00; --b1-bad: #c0392b; /* Tense colours — meaning is consistent site-wide (proposal C1/C2) */ --b1-present: #1f6feb; /* present simple */ --b1-past: #8a4fbf; /* past simple */ --b1-perfect: #1a7f4b; /* present perfect */ --b1-future: #c47f00; /* future forms */ --b1-continuous: #be185d; /* continuous aspect (B2) */ /* Typography — generous base, user-scalable */ --b1-font: "Noto Sans", "Noto Sans HK", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; --b1-scale: 1; /* text-size control multiplies this */ --b1-base: calc(18px * var(--b1-scale)); --b1-radius: 14px; --b1-tap: 48px; /* minimum tap target */ --b1-shadow: 0 2px 10px rgba(0,0,0,.07); --b1-maxw: 760px; } * { box-sizing: border-box; } html { -webkit-text-size-adjust: 100%; } body { margin: 0; font-family: var(--b1-font); font-size: var(--b1-base); line-height: 1.6; color: var(--b1-ink); background: var(--b1-bg); } /* Language visibility — toggled by app.js on */ html[data-lang="en"] .only-zh { display: none !important; } html[data-lang="zh"] .only-en { display: none !important; } /* Anti-flicker: keep the body invisible until app.js has applied the language. The early head script sets data-lang from localStorage, so CSS visibility rules above are already correct; this only hides the brief moment before textContent swap, so users navigating in EN never see a flash of ZH. Reveal automatically after a short fallback even if scripts fail to load. */ html:not([data-ready]) body { visibility: hidden; animation: b1Reveal 0s linear 0.6s forwards; } @keyframes b1Reveal { to { visibility: visible; } } img { max-width: 100%; height: auto; display: block; } a { color: var(--b1-accent); } h1,h2,h3 { line-height: 1.25; } h1 { font-size: 1.7em; } h2 { font-size: 1.35em; } h3 { font-size: 1.1em; } /* ---------- Layout ---------- */ .b1-wrap { max-width: var(--b1-maxw); margin: 0 auto; padding: 0 16px 24px; } .b1-section { margin: 28px 0; } .b1-card { background: var(--b1-surface); border: 1px solid var(--b1-line); border-radius: var(--b1-radius); padding: 18px; box-shadow: var(--b1-shadow); margin: 16px 0; } /* The four-strip subject template markers */ .strip { margin: 26px 0; } .strip-label { display: inline-block; font-size: .8em; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: #fff; background: var(--b1-brand); padding: 4px 12px; border-radius: 999px; margin-bottom: 10px; } /* ---------- Top bar ---------- */ .b1-topbar { position: sticky; top: 0; z-index: 50; background: var(--b1-brand); color: #fff; display: flex; align-items: center; gap: 10px; padding: 8px 12px; box-shadow: 0 2px 8px rgba(0,0,0,.15); } .b1-topbar a.brand { color:#fff; text-decoration:none; font-weight:700; font-size:1.05em; display: inline-flex; align-items: center; gap: 8px; } .b1-topbar .brand-logo { height: 28px; width: auto; display: block; } .b1-topbar .spacer { flex: 1; } .b1-topbar button { min-height: var(--b1-tap); min-width: var(--b1-tap); border: 1px solid rgba(255,255,255,.5); background: rgba(255,255,255,.12); color:#fff; border-radius: 10px; font-size: .9em; cursor: pointer; padding: 6px 12px; } .b1-topbar button:hover { background: rgba(255,255,255,.25); } .b1-topbar button[aria-pressed="true"] { background:#fff; color: var(--b1-brand); font-weight:700; } /* ---------- Buttons / pills ---------- */ .btn { display: inline-flex; align-items: center; justify-content:center; gap: 8px; min-height: var(--b1-tap); padding: 10px 18px; border-radius: 12px; border: 2px solid var(--b1-brand); background: var(--b1-brand); color:#fff; font: inherit; font-weight:600; text-decoration: none; cursor: pointer; } .btn.secondary { background:#fff; color: var(--b1-brand); } .btn.ghost { background:transparent; border-color: var(--b1-line); color: var(--b1-ink); } .btn:disabled { opacity:.5; cursor: default; } .tile { min-height: var(--b1-tap); border: 2px solid var(--b1-line); background:#fff; border-radius: 12px; padding: 12px 14px; font: inherit; cursor: pointer; text-align:left; } .tile:hover { border-color: var(--b1-accent); } .tile.is-correct { border-color: var(--b1-ok); background:#eafaf0; } .tile.is-wrong { border-color: var(--b1-bad); background:#fdecea; } .tile.is-selected{ border-color: var(--b1-accent); background:#eaf2fe; } /* ---------- Subject grid (home / library) ---------- */ .subj-grid { display:grid; gap:14px; grid-template-columns: 1fr; } .subj-grid a { display:flex; gap:14px; align-items:center; background: var(--b1-surface); border:1px solid var(--b1-line); border-radius: var(--b1-radius); padding:16px; text-decoration:none; color:inherit; box-shadow: var(--b1-shadow); } .subj-grid a:hover { border-color: var(--b1-brand); } .subj-grid .emoji { font-size: 2.2em; line-height:1; } .subj-grid .meta small { color: var(--b1-ink-soft); } /* ---------- Audio speaker button ---------- */ b1-audio { display: inline-flex; vertical-align: middle; } .b1-spk { min-width: 40px; min-height: 40px; border-radius: 50%; border:2px solid var(--b1-accent); background:#eaf2fe; color: var(--b1-accent); cursor:pointer; font-size: 1.05em; display:inline-flex; align-items:center; justify-content:center; padding:0; } .b1-spk.examiner { border-color:#5a3ea8; color:#5a3ea8; background:#f0ebfb; } .b1-spk.model { border-color: var(--b1-ok); color: var(--b1-ok); background:#eafaf0; } .b1-spk.narrator { border-color: var(--b1-warn); color:#8a5a00; background:#fdf4e3; } .b1-spk.playing { animation: pulse 1s infinite; } .b1-spk.missing { opacity:.4; } @keyframes pulse { 50% { transform: scale(1.12); } } /* ---------- Flashcards (C11) ---------- */ .flash { perspective: 1200px; } .flash-card { min-height: 150px; cursor:pointer; position:relative; border:2px solid var(--b1-line); border-radius: var(--b1-radius); background:#fff; padding:22px; display:flex; flex-direction:column; justify-content:center; align-items:center; text-align:center; gap:10px; transition: border-color .2s; } .flash-card:hover { border-color: var(--b1-accent); } .flash-q { font-size:1.15em; font-weight:600; } .flash-a { color: var(--b1-ok); font-size:1.1em; } .flash-hint { color: var(--b1-ink-soft); font-size:.85em; } .pos { font-size:.7em; font-weight:500; color: var(--b1-ink-soft); margin-left:6px; cursor: help; font-style: italic; } .flash-nav { display:flex; gap:10px; align-items:center; justify-content:space-between; margin-top:12px; } /* ---------- Q&A list (opening questions) ---------- */ .qa { padding:14px 16px; } .qa-q { font-size:1.1em; } .qa-a { margin-top:10px; padding-top:10px; border-top:1px dashed var(--b1-line); color:var(--b1-ok); font-size:1.05em; } .qa-reveal { margin-top:10px; font-size: 1em; font-weight: 500; border: 1.5px dashed #8a5a00; color: #8a5a00; background: #fdf4e3; padding: 8px 16px; border-radius: 999px; display: inline-flex; align-items: center; gap: 6px; cursor: pointer; animation: qaPulse 2.2s ease-in-out infinite; } .qa-reveal:hover { background:#fbe9c4; border-style: solid; } .qa-reveal .qa-emoji { font-size: 1.55em; vertical-align: -3px; margin-right: 4px; display:inline-block; animation: qaNudge 2.2s ease-in-out infinite; } @keyframes qaPulse { 0%,100% { box-shadow: 0 0 0 0 rgba(181,137,0,.0); } 50% { box-shadow: 0 0 0 6px rgba(181,137,0,.20); } } @keyframes qaNudge { 0%,100% { transform: translateY(-3px) rotate(-6deg); } 50% { transform: translateY(-3px) rotate(6deg); } } /* verb highlight inside a sentence (universal past-tense marker) */ .verb-hl { background:#fff2b8; border-radius:5px; padding:0 4px; font-weight:700; cursor: help; border-bottom: 2px dotted #b58900; box-decoration-break:clone; -webkit-box-decoration-break:clone; position: relative; } .verb-hl.perfect { background:#e3eefe; border-bottom-color:#1f6feb; } .verb-hl.continuous { background:#fce7f3; border-bottom-color:var(--b1-continuous); } .verb-hl:focus { outline: 2px solid var(--b1-accent); outline-offset: 2px; } .verb-tip { display: none; position: absolute; bottom: calc(100% + 6px); left: 50%; transform: translateX(-50%); background: #222; color: #fff; padding: 6px 10px; border-radius: 8px; font-size: .85em; font-weight: 500; white-space: nowrap; z-index: 100; pointer-events: none; box-shadow: 0 4px 12px rgba(0,0,0,.2); } .verb-tip::after { content: ""; position: absolute; top: 100%; left: 50%; transform: translateX(-50%); border: 5px solid transparent; border-top-color: #222; } .verb-hl:hover .verb-tip, .verb-hl:focus .verb-tip, .verb-hl.show-tip .verb-tip { display: block; } /* ---------- Model answer (C9) ---------- */ .model-line { display:flex; gap:10px; align-items:flex-start; padding:8px 0; border-bottom:1px dashed var(--b1-line); } .model-line:last-child { border-bottom:none; } .tag { font-size:.72em; font-weight:700; padding:2px 8px; border-radius:999px; color:#fff; white-space:nowrap; } .tag.present{background:var(--b1-present);} .tag.past{background:var(--b1-past);} .tag.perfect{background:var(--b1-perfect);} .tag.future{background:var(--b1-future);} .tag.continuous{background:var(--b1-continuous);} .tag.vocab{background:#444;} .tag.phrase{background:#0a7d8c;} .hl { border-bottom:3px solid transparent; cursor:help; } .hl.present{border-color:var(--b1-present);} .hl.past{border-color:var(--b1-past);} .hl.perfect{border-color:var(--b1-perfect);} .hl.future{border-color:var(--b1-future);} .hl.continuous{border-color:var(--b1-continuous);} /* Inline Chinese gloss for difficult vocab — stays visible in EN view (no data-en/data-zh, so applyLang() never rewrites it). */ .gloss { color: var(--b1-ink-soft); font-size:.85em; font-style:italic; } /* ---------- B2 typed cloze (b2-cloze) ---------- */ .b2-cloze .cloze-line { font-size:1.1em; line-height:2; margin:6px 0; } .b2-cloze input { font-size:1em; padding:6px 8px; min-width:120px; border:2px solid var(--b1-line); border-radius:8px; font-family:inherit; } .b2-cloze input:focus { outline:none; border-color:var(--b1-accent); } .b2-cloze input.is-correct { border-color:var(--b1-ok); background:#eafaf0; } .b2-cloze input.is-wrong { border-color:var(--b1-bad); background:#fdece9; } .b2-cloze .cloze-reveal { font-size:.85em; margin-left:6px; } .b2-cloze .cloze-hint { color:var(--b1-ink-soft); font-size:.85em; margin-left:4px; } /* Muted, non-clickable CTA / button (e.g. a feature that is coming soon) */ .cta-link.disabled, .btn.disabled { opacity:.55; pointer-events:none; cursor:default; } /* Per-point cue label in the topic/answer planner (b1-topicform pointLabels) */ .pt-cue { font-size:.85em; color:var(--b1-ink-soft); margin:2px 0; } /* ---------- B2 listening player (b2-listen) ---------- */ .b2-listen .listen-bar { display:flex; gap:10px; align-items:center; flex-wrap:wrap; margin:8px 0; } .b2-listen .play-count { font-size:.85em; color:var(--b1-ink-soft); } /* ---------- Builder (C8) ---------- */ .builder-frame { font-size:1.15em; line-height:2.2; } .slot { display:inline-block; min-width:90px; min-height:38px; border-bottom:3px solid var(--b1-accent); padding:2px 8px; margin:0 4px; text-align:center; background:#eaf2fe; border-radius:6px 6px 0 0; cursor:pointer; } .slot.filled { background:#eafaf0; border-color: var(--b1-ok); } .chip { display:inline-block; margin:4px; padding:8px 14px; border-radius:999px; border:2px solid var(--b1-line); background:#fff; cursor:pointer; font:inherit; min-height:40px; } .chip:hover{ border-color: var(--b1-accent); } .chip.used { opacity:.35; pointer-events:none; } .chip.is-selected { background:#1f6feb; color:#fff; border-color:#1f6feb; box-shadow:0 0 0 3px rgba(31,111,235,.18); } /* assembled sentence box (genre wheel etc.) */ .assembled { margin-top: 14px; background: #eafaf0; border: 2px solid var(--b1-ok); border-radius: var(--b1-radius); padding: 14px 16px; font-size: 1.2em; font-weight: 600; } .assembled.warn { background:#fdf6e7; border-color: var(--b1-warn); } .assembled .note-line { display:block; font-size:.75em; font-weight:400; color:#8a5a00; margin-top:6px; } /* ---------- Feedback / notes ---------- */ .feedback { margin-top:10px; font-weight:600; min-height:1.5em; } .feedback.ok { color: var(--b1-ok); } .feedback.no { color: var(--b1-bad); } .note { border-left:5px solid var(--b1-accent); background:#f3f7ff; padding:10px 14px; border-radius:0 10px 10px 0; margin:12px 0; } .note.warn { border-color: var(--b1-warn); background:#fdf6e7; } .note.bad { border-color: var(--b1-bad); background:#fdece9; } /* Low-profile B1/B2 cross-link on the landing pages (not a boxy .note). */ .section-switch { text-align:center; font-size:.9em; color:var(--b1-ink-soft); margin:12px 0 4px; } .section-switch a { color:var(--b1-accent); text-decoration:none; font-weight:600; } .section-switch a:hover { text-decoration:underline; } /* usage note card (C12) */ .usage { display:grid; gap:10px; } .usage .row { display:flex; gap:10px; align-items:center; padding:10px; border-radius:10px; } .usage .row.no { background:#fdece9; } .usage .row.ok { background:#eafaf0; } .usage .mark { font-size:1.3em; } /* ---------- Timeline (C1) ---------- */ .timeline { position:relative; height:64px; margin:30px 0; } .timeline .bar { position:absolute; top:50%; left:0; right:0; height:4px; background:var(--b1-line); } .timeline .pt { position:absolute; top:50%; transform:translate(-50%,-50%); text-align:center; font-size:.8em; color:var(--b1-ink-soft); } .timeline .pt .dot { width:14px; height:14px; border-radius:50%; background:var(--b1-ink-soft); margin:0 auto 4px; } .timeline .marker { position:absolute; top:0; transform:translateX(-50%); transition:left .5s ease; font-size:1.6em; } /* ---------- Sorter / categoriser (C7) ---------- */ .buckets { display:grid; gap:12px; grid-template-columns:1fr; margin-top:12px; } .bucket { border:2px dashed var(--b1-line); border-radius:12px; padding:10px; min-height:70px; } .bucket h4 { margin:0 0 8px; } .bucket.over { border-color: var(--b1-accent); background:#eaf2fe; } .bucket-items, .pool { display:flex; flex-wrap:wrap; gap:8px; } .drag-item { padding:8px 14px; border-radius:999px; border:2px solid var(--b1-line); background:#fff; cursor:grab; min-height:40px; } .drag-item.placed-ok { border-color:var(--b1-ok); background:#eafaf0; } /* ---------- Help me now (C15) ---------- */ .helpnow { position:relative; } .helpnow > button { width:100%; } .helpnow-panel { margin-top:10px; } /* ---------- Progress / readiness ---------- */ .rating { display:flex; gap:8px; flex-wrap:wrap; margin:8px 0; } .rating button { flex:1; min-width:120px; } .progress-done { color: var(--b1-ok); font-weight:700; } /* ---------- Footer ---------- */ .b1-footer { border-top:1px solid var(--b1-line); margin-top:40px; padding:20px 16px; color:var(--b1-ink-soft); font-size:.85em; text-align:center; } .b1-cta-strip { margin: 12px 0 0; padding: 12px 16px; border-top: 1px dashed var(--b1-line); border-bottom: 1px dashed var(--b1-line); display: flex; flex-wrap: wrap; gap: 10px 14px; justify-content: center; align-items: center; font-size: .95em; } .b1-cta-strip .cta-link { display: inline-flex; align-items: center; gap: 6px; padding: 6px 14px; border: 1px solid var(--b1-line); border-radius: 999px; color: var(--b1-ink-soft); text-decoration: none; background: transparent; } .b1-cta-strip .cta-link:hover, .b1-cta-strip .cta-link:focus { border-color: var(--b1-brand); color: var(--b1-brand); background: rgba(0,0,0,.02); } .b1-cta-strip .cta-sep { color: var(--b1-line); } @media (max-width: 420px) { .b1-cta-strip .cta-sep { display: none; } } .b1-no-audio { position:fixed; left:50%; bottom:16px; transform:translateX(-50%); max-width:min(640px, calc(100vw - 24px)); background:#fff7e0; border:1.5px solid #b58900; color:#5a3d00; padding:10px 14px 10px 16px; border-radius:10px; box-shadow:0 6px 24px rgba(0,0,0,.15); font-size:.95em; line-height:1.4; z-index:9999; display:flex; gap:10px; align-items:flex-start; } .b1-no-audio button { flex:0 0 auto; background:transparent; border:0; font-size:1.3em; line-height:1; color:#5a3d00; cursor:pointer; padding:0 4px; } .b1-no-audio button:hover { color:#000; } /* ---------- Container-aware: wider screens ---------- */ @container (min-width: 560px) { .subj-grid { grid-template-columns: 1fr 1fr; } } @media (min-width: 560px) { .subj-grid { grid-template-columns: 1fr 1fr; } .buckets { grid-template-columns: 1fr 1fr; } } /* Respect reduced motion */ @media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } } /* ---------- Print: clean B&W layout for paper revision ---------- */ @media print { @page { margin: 1.5cm; } html, body { background: #fff !important; color: #000 !important; } body { font-size: 11pt; line-height: 1.45; } * { animation: none !important; transition: none !important; box-shadow: none !important; } /* Hide on-screen-only chrome */ .b1-topbar, .b1-spk, .b1-speed, .b1-no-audio, .qa-reveal, nav.b1-card, .flash-hint, #b1-cta-strip, #b1-print { display: none !important; } /* Keep questions, answers, examples, and cards together on one page */ .b1-card, .strip, .ex, .item, .qa { break-inside: avoid; page-break-inside: avoid; } /* Show URLs after every external link (footer / outbound), but not on internal buttons rendered as anchors or the brand link itself (which is hidden along with the topbar). */ a[href^="http"]:not(.b1-spk)::after { content: " (" attr(href) ")"; font-size: .85em; color: #555; word-break: break-all; } /* Subtler borders on paper than on screen */ .b1-card { border-color: #ccc !important; } }