/* ══════════════════════════════════════════════════════════════
   AI-WB-001 LESSON PLAYER — DESIGN SYSTEM COMPLIANT
   All colors, fonts, radii, shadows, spacing from design-system.css
   Zero hardcoded hex — 100% CSS variables
   ══════════════════════════════════════════════════════════════ */

.wb-lms-wrap {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px 60px;
    font-family: var(--font-body);
    color: var(--color-text);
}

/* ── Hero Command Center ── */
.wb-hero {
    position: relative;
    background: var(--brand-gradient);
    color: #fff;
    padding: 48px 44px 44px;
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}
.wb-hero::before {
    content: '';
    position: absolute; inset: 0;
    background: radial-gradient(ellipse at 25% 20%, rgba(255,255,255,.08) 0%, transparent 55%),
                radial-gradient(ellipse at 75% 80%, rgba(13,148,136,.12) 0%, transparent 50%);
    pointer-events: none;
}
.wb-hero__eyebrow {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: .72rem; font-weight: 800; text-transform: uppercase;
    letter-spacing: .12em; color: var(--color-gold);
    margin-bottom: var(--space-md); position: relative; z-index: 1;
}
.wb-hero__eyebrow .pulse-dot {
    width: 8px; height: 8px; background: var(--color-gold); border-radius: 50%;
    animation: wb-pulse-glow 2s ease-in-out infinite;
}
@keyframes wb-pulse-glow {
    0%, 100% { box-shadow: 0 0 0 0 rgba(251,191,36,.5); }
    50% { box-shadow: 0 0 0 6px rgba(251,191,36,0); }
}
.wb-hero__h1 {
    font-family: var(--font-heading);
    font-size: 2.25rem; font-weight: 800; line-height: 1.2;
    margin: 0 0 var(--space-md); position: relative; z-index: 1;
    color: #fff;
}
.wb-hero__sub {
    font-size: 1.05rem; color: rgba(255,255,255,.8); line-height: 1.65;
    margin: 0 0 var(--space-xl); max-width: 640px;
    position: relative; z-index: 1;
}
.wb-hero__metrics {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-md);
    margin-bottom: var(--space-xl); position: relative; z-index: 1;
}
.wb-hero__metric {
    background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.12);
    border-radius: var(--radius-lg); padding: 18px 20px; text-align: center;
    backdrop-filter: blur(10px);
    transition: transform .2s ease, background .2s ease;
}
.wb-hero__metric:hover { background: rgba(255,255,255,.14); transform: translateY(-2px); }
.wb-hero__metric-val {
    font-family: var(--font-heading);
    font-size: 1.5rem; font-weight: 800; color: #fff;
    line-height: 1; margin-bottom: 6px;
}
.wb-hero__metric-label {
    font-size: .75rem; color: rgba(255,255,255,.6); font-weight: 600;
}
.wb-hero__cta-row {
    display: flex; flex-wrap: wrap; gap: var(--space-sm);
    align-items: center; position: relative; z-index: 1;
}
.wb-cta-primary {
    display: inline-flex; align-items: center; gap: 8px;
    background: var(--color-cta); color: #fff;
    border: none; padding: 14px 32px;
    border-radius: var(--radius-md); font-size: 1rem; font-weight: 700;
    cursor: pointer; transition: all .2s var(--transition-base);
    box-shadow: 0 4px 16px rgba(234,88,12,.35);
}
.wb-cta-primary:hover {
    background: var(--color-cta-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(234,88,12,.4);
}
.wb-cta-secondary {
    display: inline-flex; align-items: center; gap: 6px;
    background: rgba(255,255,255,.1); color: #fff;
    border: 1px solid rgba(255,255,255,.18); padding: 12px 24px;
    border-radius: var(--radius-md); font-size: .92rem; font-weight: 600;
    cursor: pointer; transition: all .2s; text-decoration: none;
}
.wb-cta-secondary:hover { background: rgba(255,255,255,.16); color: #fff; }
.wb-hero__trust {
    display: flex; flex-wrap: wrap; gap: 12px; align-items: center;
    margin-top: var(--space-xl); padding-top: var(--space-lg);
    border-top: 1px solid rgba(255,255,255,.1);
    position: relative; z-index: 1;
}
.wb-hero__trust-item {
    font-size: .73rem; color: rgba(255,255,255,.45); font-weight: 600;
    display: flex; align-items: center; gap: 4px;
}
.wb-hero__trust-item span { color: rgba(255,255,255,.6); }

/* ── Sticky Progress Bar ── */
.wb-sticky-bar {
    position: sticky; top: 0; z-index: 100;
    background: rgba(255,255,255,.96); backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border); padding: 10px 0;
    margin: 0 -24px 20px; padding-left: 24px; padding-right: 24px;
    box-shadow: var(--shadow-sm);
}
.wb-sticky-bar__inner {
    display: flex; align-items: center; justify-content: space-between;
    gap: var(--space-md); max-width: 1200px; margin: 0 auto;
}
.wb-progress-track {
    flex: 1; height: 6px; background: var(--color-border-light);
    border-radius: var(--radius-full); overflow: hidden;
}
.wb-progress-bar {
    height: 100%; width: 0%;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    transition: width .5s cubic-bezier(.4,0,.2,1);
}
.wb-progress-text {
    font-size: .8rem; font-weight: 700; color: var(--color-primary);
    white-space: nowrap;
}
.wb-timer-badge {
    font-size: .76rem; font-weight: 700; color: var(--color-text-muted);
    background: var(--color-border-light); padding: 4px 12px;
    border-radius: var(--radius-sm); white-space: nowrap;
    display: flex; align-items: center; gap: 4px;
}
.wb-timer-badge.active { background: var(--color-primary-bg); color: var(--color-primary); }

/* ── Main Layout: Sidebar (left) + Content (right) ── */
.wb-layout {
    display: grid; grid-template-columns: 260px 1fr; gap: var(--space-xl);
    align-items: start;
}
.wb-content { min-width: 0; width: 100%; }
.wb-stage-panel, .wb-art-pane, .wb-card, .wb-md { min-width: 0; max-width: 100%; }
.wb-md img, .wb-md video, .wb-md iframe { max-width: 100%; height: auto; }
.wb-art-tabs { min-width: 0; max-width: 100%; overflow-x: auto; overscroll-behavior-x: contain; }
.wb-art-tab { flex: 0 0 auto; white-space: nowrap; }
.wb-table-wrap, .wb-md .wb-table-wrap { max-width: 100%; overflow-x: auto; }

/* ── Sidebar Timeline ── */
.wb-sidebar {
    position: sticky; top: 64px;
    background: var(--color-bg-white); border: 1px solid var(--color-border);
    border-radius: var(--radius-lg); padding: var(--space-lg) var(--space-md);
    box-shadow: var(--shadow-md);
}
.wb-sidebar__title {
    font-family: var(--font-heading);
    font-size: .7rem; font-weight: 800; text-transform: uppercase;
    letter-spacing: .12em; color: var(--color-text-muted); margin-bottom: var(--space-md);
}
.wb-tl-item {
    display: flex; align-items: flex-start; gap: 10px;
    padding: 10px; border-radius: var(--radius-md); cursor: pointer;
    transition: all .15s var(--transition-fast); margin-bottom: 2px;
    position: relative; border: 1.5px solid transparent;
}
.wb-tl-item:hover { background: var(--color-border-light); }
.wb-tl-item.active {
    background: var(--color-primary-bg);
    border-color: var(--color-primary-light);
}
.wb-tl-item.completed .wb-tl-icon { background: var(--color-accent); color: #fff; }
.wb-tl-item.locked { opacity: .5; cursor: not-allowed; }
.wb-tl-item.locked:hover { background: transparent; }
.wb-tl-icon {
    width: 28px; height: 28px; min-width: 28px;
    border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center;
    font-size: .72rem; font-weight: 800; transition: all .2s;
}
.wb-tl-icon.available { background: var(--color-primary); color: #fff; }
.wb-tl-icon.in-progress { background: var(--color-warning); color: var(--color-text); animation: wb-pulse-warn 2s infinite; }
.wb-tl-icon.submitted { background: var(--color-info); color: #fff; }
.wb-tl-icon.error { background: var(--color-danger); color: #fff; }
.wb-tl-icon.locked { background: var(--color-border-light); color: var(--color-text-muted); }
@keyframes wb-pulse-warn {
    0%, 100% { box-shadow: 0 0 0 0 rgba(234,179,8,.4); }
    50% { box-shadow: 0 0 0 4px rgba(234,179,8,0); }
}
.wb-tl-info { flex: 1; min-width: 0; }
.wb-tl-code { font-size: .66rem; font-weight: 700; color: var(--color-primary); }
.wb-tl-title { font-size: .76rem; font-weight: 600; color: var(--color-text-secondary); line-height: 1.3; }
.wb-tl-min { font-size: .63rem; color: var(--color-text-muted); }
.wb-tl-connector {
    position: absolute; left: 23px; top: 38px; width: 2px; height: 12px;
    background: var(--color-border);
}
.wb-tl-item.completed .wb-tl-connector { background: var(--color-accent); }

/* ── Stage Panel ── */
.wb-stage-panel { display: none; animation: wb-fadeIn .3s ease; }
.wb-stage-panel.active { display: block; }
@keyframes wb-fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}
.wb-stage-header {
    background: var(--brand-gradient);
    color: #fff; border-radius: var(--radius-lg); padding: var(--space-xl) var(--space-xl);
    margin-bottom: var(--space-xl); position: relative; overflow: hidden;
}
.wb-stage-header::after {
    content: ''; position: absolute; top: -30px; right: -30px;
    width: 120px; height: 120px; border-radius: 50%;
    background: rgba(255,255,255,.06);
}
.wb-stage-header__tag {
    display: inline-flex; align-items: center; gap: 6px;
    font-size: .7rem; font-weight: 800; text-transform: uppercase;
    letter-spacing: .1em; background: rgba(255,255,255,.15);
    color: #fff; padding: 4px 12px; border-radius: var(--radius-full);
    margin-bottom: var(--space-sm);
}
.wb-stage-header__title {
    font-family: var(--font-heading);
    font-size: 1.4rem; font-weight: 800; margin: 0 0 var(--space-sm); color: #fff; line-height: 1.3;
}
.wb-stage-header__desc {
    font-size: .9rem; color: rgba(255,255,255,.7); margin: 0 0 var(--space-md); line-height: 1.6;
}
.wb-stage-header__meta {
    display: flex; flex-wrap: wrap; gap: var(--space-md); font-size: .8rem;
}
.wb-stage-header__meta-item {
    display: flex; align-items: center; gap: 6px; color: rgba(255,255,255,.8);
}
.wb-stage-header__meta-item strong { color: var(--color-gold); }

/* ── Artifact Tabs ── */
.wb-art-tabs {
    display: flex; flex-wrap: wrap; gap: 8px;
    margin-bottom: var(--space-lg); border-bottom: 1px solid var(--color-border);
    padding-bottom: var(--space-sm);
}
.wb-art-tab {
    background: var(--color-border-light); border: 1px solid var(--color-border);
    border-radius: var(--radius-sm); padding: 8px 16px; font-size: .8rem;
    font-weight: 600; color: var(--color-text-secondary); cursor: pointer;
    transition: all .15s var(--transition-fast);
}
.wb-art-tab:hover { background: var(--color-border); }
.wb-art-tab.active {
    background: var(--color-primary); color: #fff; border-color: var(--color-primary);
}
.wb-art-pane { display: none; animation: wb-fadeIn .2s ease; }
.wb-art-pane.active { display: block; }

/* ── Content Cards ── */
.wb-card {
    background: var(--color-bg-white); border: 1px solid var(--color-border);
    border-radius: var(--radius-lg); padding: var(--space-xl);
    margin-bottom: var(--space-lg); box-shadow: var(--shadow-sm);
}
.wb-card__title {
    font-family: var(--font-heading);
    font-size: 1.05rem; font-weight: 700; color: var(--color-text);
    margin: 0 0 var(--space-md); display: flex; align-items: center;
    gap: 8px; flex-wrap: wrap;
}
.wb-card__badge {
    font-size: .65rem; font-weight: 700;
    background: var(--color-primary-bg); color: var(--color-primary);
    padding: 3px 10px; border-radius: var(--radius-sm);
}

/* ── Markdown Typography ── */
.wb-md h1, .wb-md h2, .wb-md h3, .wb-md h4, .wb-md h5, .wb-md h6 {
    font-family: var(--font-heading); font-weight: 700;
    color: var(--color-text); margin: 20px 0 8px;
}
.wb-md h1.wb-heading-1 { font-size: 1.35rem; color: var(--color-primary); border-bottom: 2px solid var(--color-border); padding-bottom: 8px; }
.wb-md h2.wb-heading-2 { font-size: 1.15rem; color: var(--color-primary); }
.wb-md h3.wb-heading-3 { font-size: 1rem; color: var(--color-primary-dark); }
.wb-md h4.wb-heading-4 { font-size: .9rem; color: var(--color-text-secondary); }
.wb-md p.wb-paragraph { margin: 0 0 var(--space-md); font-size: .9rem; line-height: 1.75; color: var(--color-text-secondary); }
.wb-md ul.wb-list, .wb-md ol.wb-list-ordered { padding-left: 22px; margin: 0 0 var(--space-md); }
.wb-md li { margin-bottom: 5px; font-size: .9rem; line-height: 1.65; color: var(--color-text-secondary); }
.wb-md blockquote.wb-quote {
    border-left: 4px solid var(--color-accent); margin: var(--space-md) 0;
    padding: var(--space-md) var(--space-lg);
    background: #f0fdfa; color: #115e59; font-style: italic;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-size: .9rem; line-height: 1.65;
}
.wb-md code.wb-code-inline {
    background: var(--color-border-light); color: var(--color-text);
    padding: 2px 8px; border-radius: var(--radius-sm);
    font-size: .85em; font-family: 'Fira Code', monospace;
}
.wb-md pre.wb-code-block {
    background: var(--color-bg-dark); color: var(--color-text-light);
    padding: var(--space-lg); border-radius: var(--radius-md);
    overflow-x: auto; margin: var(--space-md) 0; font-size: .85rem; line-height: 1.6;
}
.wb-md pre.wb-code-block code { background: transparent; color: inherit; padding: 0; }
.wb-md .wb-table-wrap { overflow-x: auto; margin: var(--space-md) 0; border-radius: var(--radius-md); border: 1px solid var(--color-border); }
.wb-md table.wb-table-custom { width: 100%; border-collapse: collapse; font-size: .84rem; }
.wb-md table.wb-table-custom th {
    background: var(--color-primary); color: #fff; padding: 12px 16px;
    text-align: left; font-weight: 700; white-space: nowrap;
}
.wb-md table.wb-table-custom td { border-bottom: 1px solid var(--color-border); padding: 10px 14px; color: var(--color-text-secondary); vertical-align: top; }
.wb-md table.wb-table-custom tr:nth-child(even) { background: var(--color-bg-light); }
.wb-md table.wb-table-custom tr:hover { background: var(--color-primary-bg); }
.wb-md strong { font-weight: 700; color: var(--color-text); }
.wb-stage-panel.active .wb-art-pane.active .wb-md { max-height: 620px; overflow-y: auto; padding-right: 14px; }
@media (max-width: 600px) { .wb-stage-panel.active .wb-art-pane.active .wb-md { max-height: 520px; } }
.wb-md a { color: var(--color-primary); text-decoration: underline; }
.wb-md a:hover { color: var(--color-primary-dark); }

/* ── Media Players ── */
.wb-video-box {
    position: relative; aspect-ratio: 16/9; border-radius: var(--radius-lg);
    overflow: hidden; background: var(--color-bg-dark); margin: var(--space-md) 0;
    box-shadow: var(--shadow-lg);
}
.wb-video-box iframe { width: 100%; height: 100%; border: 0; }
.wb-audio-box {
    background: var(--color-bg-light); border: 1px solid var(--color-border);
    border-radius: var(--radius-lg); padding: var(--space-lg);
    margin: var(--space-md) 0; display: flex; flex-direction: column; gap: 10px;
}
.wb-audio-box audio { width: 100%; border-radius: var(--radius-sm); }
.wb-audio-info { font-size: .8rem; color: var(--color-text-muted); display: flex; justify-content: space-between; }

/* ── Data Table ── */
.wb-table-custom { width: 100%; border-collapse: collapse; font-size: .84rem; }
.wb-table-custom th {
    background: var(--color-primary); color: #fff; padding: 12px 14px;
    text-align: left; font-weight: 700; position: sticky; top: 0;
}
.wb-table-custom td {
    border-bottom: 1px solid var(--color-border); padding: 10px 14px;
    color: var(--color-text-secondary); vertical-align: top;
}
.wb-table-custom tr:hover { background: var(--color-bg-light); }

/* ── Mind-Map Tree ── */
.wb-tree { padding: var(--space-sm) 0; }
.wb-tree-node { margin: 6px 0; }
.wb-tree-label {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 6px 14px; border-radius: var(--radius-sm); font-size: .86rem;
    font-weight: 600; cursor: pointer; transition: all .15s;
}
.wb-tree-label:hover { transform: translateX(4px); }
.wb-tree-label.root { background: var(--color-bg-dark); color: #fff; font-weight: 700; font-size: .95rem; }
.wb-tree-label.branch { background: var(--color-primary-bg); color: var(--color-primary-dark); border: 1px solid var(--color-primary-light); }
.wb-tree-label.leaf { background: var(--color-border-light); color: var(--color-text-secondary); border: 1px solid var(--color-border); }
.wb-tree-children {
    padding-left: 24px; border-left: 2px dashed var(--color-border);
    margin-left: 12px; margin-top: 4px;
}

/* ── Flashcards ── */
.wb-fc-container { max-width: 540px; margin: var(--space-xl) auto; }
.wb-fc-card { height: 280px; perspective: 1200px; cursor: pointer; }
.wb-fc-inner {
    position: relative; width: 100%; height: 100%;
    transform-style: preserve-3d;
    transition: transform .6s cubic-bezier(.4,0,.2,1);
}
.wb-fc-inner.flipped { transform: rotateY(180deg); }
.wb-fc-side {
    position: absolute; inset: 0; backface-visibility: hidden;
    border-radius: var(--radius-xl); padding: var(--space-xl) var(--space-xl);
    display: flex; flex-direction: column; justify-content: space-between;
}
.wb-fc-front {
    background: var(--brand-gradient); color: #fff;
    border: 2px solid rgba(255,255,255,.15);
}
.wb-fc-back {
    background: var(--color-bg-white); color: var(--color-text);
    border: 2px solid var(--color-primary-light);
    transform: rotateY(180deg); box-shadow: var(--shadow-lg);
}
.wb-fc-meta { display: flex; justify-content: space-between; align-items: center; font-size: .75rem; color: rgba(255,255,255,.6); }
.wb-fc-text { font-size: 1.1rem; font-weight: 700; line-height: 1.5; margin: auto 0; text-align: center; }
.wb-fc-back .wb-fc-text { font-size: .95rem; font-weight: 500; color: var(--color-text-secondary); line-height: 1.65; text-align: left; }
.wb-fc-hint { font-size: .72rem; color: rgba(255,255,255,.5); text-align: center; }
.wb-fc-back .wb-fc-hint { color: var(--color-text-muted); }
.wb-fc-controls { display: flex; align-items: center; justify-content: center; gap: var(--space-md); margin-top: var(--space-md); }
.wb-fc-btn {
    background: var(--color-border-light); border: 1px solid var(--color-border);
    padding: 8px 18px; border-radius: var(--radius-sm); font-size: .85rem;
    font-weight: 600; color: var(--color-text-secondary); cursor: pointer;
    transition: all .15s;
}
.wb-fc-btn:hover { background: var(--color-border); }
.wb-fc-counter { font-size: .85rem; font-weight: 700; color: var(--color-text-muted); }

/* ── Quiz ── */
.wb-quiz-wrap { max-width: 760px; margin: 0 auto; }
.wb-q-card {
    background: var(--color-bg-white); border: 1.5px solid var(--color-border);
    border-radius: var(--radius-lg); padding: var(--space-lg) var(--space-xl);
    margin-bottom: var(--space-lg); transition: all .25s;
}
.wb-q-card.answered { border-color: var(--color-border); }
.wb-q-card:hover:not(.answered) { border-color: var(--color-primary-light); box-shadow: var(--shadow-sm); }
.wb-q-num { font-size: .7rem; font-weight: 800; color: var(--color-primary); text-transform: uppercase; margin-bottom: 4px; }
.wb-q-title { font-family: var(--font-heading); font-size: 1rem; font-weight: 700; color: var(--color-text); margin: 0 0 var(--space-md); line-height: 1.5; }
.wb-opt-list { display: flex; flex-direction: column; gap: 8px; }
.wb-opt-item {
    display: flex; align-items: flex-start; gap: 10px;
    padding: 12px 16px; border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md); cursor: pointer;
    transition: all .15s; font-size: .9rem; color: var(--color-text-secondary);
}
.wb-opt-item:hover { border-color: var(--color-primary-light); background: var(--color-primary-bg); }
.wb-opt-item.selected { border-color: var(--color-primary); background: var(--color-primary-bg); font-weight: 600; color: var(--color-text); }
.wb-opt-item.correct { border-color: var(--color-success); background: #f0fdf4; color: #166534; }
.wb-opt-item.incorrect { border-color: var(--color-danger); background: #fef2f2; color: #991b1b; }
.wb-q-feedback { margin-top: 12px; padding: 12px 16px; border-radius: var(--radius-sm); font-size: .84rem; line-height: 1.6; display: none; }
.wb-q-feedback.show { display: block; animation: wb-fadeIn .2s ease; }
.wb-q-feedback.correct { background: #f0fdf4; color: #166534; border: 1px solid #bbf7d0; }
.wb-q-feedback.incorrect { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.wb-quiz-score-box {
    background: var(--brand-gradient); color: #fff;
    border-radius: var(--radius-xl); padding: var(--space-xl) var(--space-2xl);
    text-align: center; margin-top: var(--space-xl); display: none;
    position: relative; overflow: hidden;
}
.wb-quiz-score-box::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(circle at 50% 30%, rgba(255,255,255,.08) 0%, transparent 60%);
}
.wb-quiz-score-val {
    font-family: var(--font-heading);
    font-size: 3.5rem; font-weight: 900; color: var(--color-gold);
    line-height: 1; margin: 8px 0; position: relative;
}

/* ── Credential Panel ── */
.wb-cert-box {
    background: var(--brand-gradient); color: #fff;
    border-radius: var(--radius-xl); padding: var(--space-2xl) var(--space-xl);
    text-align: center; margin: var(--space-lg) 0;
    border: 2px solid rgba(255,255,255,.15);
    position: relative; overflow: hidden;
    box-shadow: var(--shadow-xl);
}
.wb-cert-box::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(ellipse at 50% 0%, rgba(251,191,36,.1) 0%, transparent 60%);
}
.wb-cert-badge {
    font-size: 3.5rem; margin-bottom: var(--space-md);
    position: relative; animation: wb-float 3s ease-in-out infinite;
}
@keyframes wb-float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
.wb-cert-title {
    font-family: var(--font-heading);
    font-size: 1.5rem; font-weight: 800; color: var(--color-gold);
    margin: 0 0 var(--space-sm); position: relative;
}
.wb-cert-sub { font-size: .9rem; color: rgba(255,255,255,.7); margin: 0 0 var(--space-xl); position: relative; }
.wb-cert-code {
    font-size: 1.05rem; font-family: 'Fira Code', monospace; font-weight: 700;
    background: rgba(0,0,0,.25); padding: 10px 24px;
    border-radius: var(--radius-md); display: inline-block;
    color: var(--color-gold); margin-bottom: var(--space-xl);
    border: 1px solid rgba(255,255,255,.1); position: relative;
    letter-spacing: .04em;
}

/* ── Stage Footer ── */
.wb-stage-footer {
    display: flex; align-items: center; justify-content: space-between;
    gap: var(--space-md); margin-top: var(--space-2xl); padding: var(--space-lg);
    background: var(--color-bg-light); border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}
.wb-btn-next {
    background: var(--color-primary); color: #fff; border: none;
    padding: 12px 28px; border-radius: var(--radius-md); font-size: .92rem;
    font-weight: 700; cursor: pointer; transition: all .2s var(--transition-base);
}
.wb-btn-next:hover { background: var(--color-primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.wb-btn-prev {
    background: transparent; color: var(--color-text-muted);
    border: 1px solid var(--color-border); padding: 12px 20px;
    border-radius: var(--radius-md); font-size: .92rem; font-weight: 600;
    cursor: pointer; transition: all .15s;
}
.wb-btn-prev:hover { background: var(--color-border-light); color: var(--color-text); }
.wb-check-stage {
    display: flex; align-items: center; gap: 8px;
    font-size: .88rem; font-weight: 600; color: var(--color-text-secondary); cursor: pointer;
}
.wb-check-stage input { width: 18px; height: 18px; accent-color: var(--color-primary); cursor: pointer; }

/* ── Activity Section ── */
.wb-activity-box {
    background: var(--color-primary-bg); border: 1.5px solid var(--color-primary-light);
    border-radius: var(--radius-lg); padding: var(--space-xl); margin: var(--space-lg) 0;
}
.wb-activity-box__header { display: flex; align-items: center; gap: 10px; margin-bottom: var(--space-md); }
.wb-activity-box__icon {
    width: 36px; height: 36px; background: var(--color-primary); color: #fff;
    border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center;
    font-size: 1rem;
}
.wb-activity-box__title { font-family: var(--font-heading); font-size: 1rem; font-weight: 700; color: var(--color-text); }
.wb-activity-box__desc { font-size: .86rem; color: var(--color-text-secondary); line-height: 1.6; margin-bottom: var(--space-md); }
.wb-prompt-copy {
    display: flex; align-items: center; gap: 8px;
    background: var(--color-bg-dark); color: var(--color-accent);
    padding: 12px 16px; border-radius: var(--radius-sm);
    font-size: .85rem; font-family: 'Fira Code', monospace;
    cursor: pointer; transition: all .2s; margin-bottom: var(--space-sm);
}
.wb-prompt-copy:hover { background: var(--color-bg-darker); }
.wb-prompt-copy .copy-icon { font-size: .75rem; }
.wb-prompt-copy.copied { background: var(--color-accent); color: #fff; }

/* ── Confetti Canvas ── */
#wb-confetti-canvas { position: fixed; inset: 0; z-index: 9999; pointer-events: none; }

/* ── Responsive ── */
@media (max-width: 960px) {
    .wb-layout { grid-template-columns: 1fr; }
    .wb-sidebar { order: 0; }
    .wb-hero__h1 { font-size: 1.5rem; }
    .wb-hero__metrics { grid-template-columns: repeat(3, 1fr); gap: 8px; }
}
@media (max-width: 600px) {
    .wb-sticky-bar { margin-left: -16px; margin-right: -16px; padding-left: 16px; padding-right: 16px; }
    .wb-stage-panel { overflow: hidden; }
    .wb-lms-wrap { padding-left: 16px; padding-right: 16px; }
    .wb-hero { padding: 28px 20px 24px; }
    .wb-hero__h1 { font-size: 1.25rem; }
    .wb-hero__metrics { grid-template-columns: 1fr; }
    .wb-hero__cta-row { flex-direction: column; }
    .wb-stage-header { padding: var(--space-lg); }
    .wb-stage-header__title { font-size: 1.15rem; }
    .wb-stage-footer { flex-direction: column; align-items: stretch; }
    .wb-art-tabs { flex-wrap: nowrap; padding-bottom: 10px; }
    .wb-card { padding: var(--space-lg); }
    .wb-cert-box { padding: var(--space-xl) var(--space-lg); }
    .wb-cert-title { font-size: 1.2rem; }
}