/* Teacher assignment links (js/practice/assignment). Kept out of styles.css so
   it ships without a styles.css version bump; uses the same tokens. */

/* ----- Share modal: "Make it an assignment" ----- */
#share-modal .share-modal {
    max-height: calc(100vh - 32px);
    max-height: calc(100dvh - 32px);
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-width: thin;
    scrollbar-color: var(--border-light) transparent;
}
.share-platform-btn[hidden],
.assign-create[hidden],
.assign-create-body[hidden],
.assign-card [hidden] { display: none; }
.share-action-btn:disabled { opacity: 0.5; cursor: default; transform: none; }

.assign-create {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
    text-align: left;
}
.assign-create-toggle {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 12px 14px;
    background: rgba(99, 102, 241, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.35);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font: inherit;
    text-align: left;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
}
.assign-create-toggle:hover { background: rgba(99, 102, 241, 0.14); border-color: rgba(99, 102, 241, 0.6); }
.assign-create-toggle:focus-visible { outline: 2px solid var(--accent-light); outline-offset: 2px; }
.assign-create-icon {
    display: grid;
    place-items: center;
    flex: 0 0 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--accent-glow);
    color: var(--accent-light);
}
.assign-create-text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.assign-create-text strong { font-size: 0.95rem; font-weight: 600; }
.assign-create-text span { font-size: 0.8rem; color: var(--text-secondary); }
.assign-chevron { flex-shrink: 0; margin-left: auto; color: var(--text-secondary); transition: transform 0.2s; }
.assign-create.is-open .assign-chevron { transform: rotate(180deg); }

.assign-create-body { display: flex; flex-direction: column; gap: 16px; margin-top: 16px; }
.assign-fieldset { min-width: 0; margin: 0; padding: 0; border: 0; }
.assign-fieldset legend,
.assign-note-head label {
    margin-bottom: 8px;
    padding: 0;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-muted);
}
.assign-setup { display: flex; flex-direction: column; gap: 2px; }
.assign-setup:empty { display: none; }
.assign-check {
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: 36px;
    font-size: 0.88rem;
    color: var(--text-primary);
    cursor: pointer;
}
.assign-check input { flex-shrink: 0; width: 18px; height: 18px; margin: 0; accent-color: var(--accent); cursor: pointer; }
.assign-hint { margin: 0; font-size: 0.78rem; line-height: 1.45; color: var(--text-secondary); }
.assign-setup + .assign-hint { margin-top: 4px; }

.assign-goal-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 6px 0;
    border-bottom: 1px solid var(--border);
}
.assign-goal-row:last-child { border-bottom: 0; }
.assign-inline { display: flex; flex-shrink: 0; align-items: center; gap: 6px; font-size: 0.8rem; color: var(--text-secondary); }
.assign-inline input {
    width: 76px;
    min-height: 38px;
    padding: 6px 10px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    font-size: 0.9rem;
}
.assign-inline input:focus,
.assign-note-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.assign-goal-keys { flex-direction: column; align-items: stretch; gap: 6px; }
.assign-keys { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 6px; }
.assign-key {
    min-height: 36px;
    padding: 4px 2px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.assign-key:hover { border-color: var(--border-light); color: var(--text-primary); }
.assign-key[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: #fff; }
.assign-key:focus-visible,
.assign-check input:focus-visible,
.assign-secondary-btn:focus-visible,
.assign-text-btn:focus-visible { outline: 2px solid var(--accent-light); outline-offset: 2px; }

.assign-note-head { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; margin-bottom: -8px; }
.assign-optional { margin-left: 4px; font-weight: 500; letter-spacing: 0; text-transform: none; }
.assign-count { font-family: 'JetBrains Mono', ui-monospace, monospace; font-size: 0.72rem; color: var(--text-muted); }
.assign-note-input {
    width: 100%;
    min-height: 64px;
    padding: 10px 12px;
    resize: vertical;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font: inherit;
    font-size: 0.88rem;
    line-height: 1.45;
}
.assign-note-input::placeholder { color: var(--text-muted); }
.assign-url-row { margin-bottom: 0; }
.assign-secondary-btn {
    width: 100%;
    min-height: 42px;
    margin-top: -8px;
    background: transparent;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font: inherit;
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
}
.assign-secondary-btn:hover:not(:disabled) { background: var(--bg-hover); }

/* ----- Student card ----- */
.assign-card {
    padding: 20px 24px;
    background: linear-gradient(110deg, rgba(99, 102, 241, 0.1), transparent 60%), var(--bg-elevated);
    border: 1px solid rgba(99, 102, 241, 0.4);
    border-radius: var(--radius-lg);
    transition: border-color 0.3s;
}
.assign-card.is-complete {
    background: linear-gradient(110deg, rgba(16, 185, 129, 0.1), transparent 60%), var(--bg-elevated);
    border-color: rgba(16, 185, 129, 0.5);
}
.assign-card-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.assign-card-heading { min-width: 0; }
.assign-eyebrow {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent-light);
}
.assign-card.is-complete .assign-eyebrow { color: #34d399; }
.assign-card h2 {
    margin: 4px 0 0;
    font-size: 1.05rem;
    font-weight: 600;
    letter-spacing: -0.2px;
    color: var(--text-primary);
    overflow-wrap: anywhere;
}
.assign-score { flex-shrink: 0; text-align: right; }
.assign-score strong {
    display: block;
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    font-size: 1.4rem;
    line-height: 1.1;
    color: var(--accent-light);
}
.assign-card.is-complete .assign-score strong { color: #34d399; }
.assign-score span { font-size: 0.7rem; color: var(--text-muted); }
.assign-note { margin: 14px 0 0; padding: 12px 14px; background: var(--bg-card); border-left: 3px solid var(--accent); border-radius: var(--radius-sm); }
.assign-note figcaption {
    margin-bottom: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-muted);
}
.assign-note blockquote { margin: 0; }
.assign-note p { margin: 0; font-size: 0.92rem; line-height: 1.5; color: var(--text-primary); white-space: pre-line; overflow-wrap: anywhere; }
.assign-setup-line { margin: 12px 0 0; font-size: 0.82rem; line-height: 1.5; color: var(--text-secondary); }
.assign-setup-line strong { font-weight: 600; color: var(--text-primary); }
.assign-meter { height: 6px; margin: 14px 0 0; overflow: hidden; background: var(--bg-base); border-radius: 3px; }
.assign-meter-fill { width: 0; height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-light)); transition: width 0.3s ease; }
.assign-card.is-complete .assign-meter-fill { background: linear-gradient(90deg, var(--success-dim), var(--success)); }
.assign-goals {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 8px;
    margin: 12px 0 0;
    padding: 0;
    list-style: none;
}
.assign-goal {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 12px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: border-color 0.3s, background 0.3s;
}
.assign-goal.is-met { border-color: rgba(16, 185, 129, 0.45); background: rgba(16, 185, 129, 0.06); }
.assign-tick {
    position: relative;
    flex: 0 0 20px;
    height: 20px;
    margin-top: 1px;
    border: 2px solid var(--border-light);
    border-radius: 50%;
    transition: background 0.2s, border-color 0.2s;
}
.assign-goal.is-met .assign-tick { background: var(--success); border-color: var(--success); }
.assign-goal.is-met .assign-tick::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 1px;
    width: 5px;
    height: 10px;
    border: solid #fff;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}
.assign-goal-text { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.assign-goal-label { font-size: 0.88rem; font-weight: 600; color: var(--text-primary); }
.assign-goal-detail { display: flex; flex-wrap: wrap; gap: 4px; font-size: 0.78rem; color: var(--text-secondary); font-variant-numeric: tabular-nums; }
.assign-chip {
    padding: 1px 8px;
    border: 1px solid var(--border-light);
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
}
.assign-chip.is-done { background: rgba(16, 185, 129, 0.15); border-color: var(--success); color: #6ee7b7; }
.assign-stats { margin: 10px 0 0; font-size: 0.8rem; color: var(--text-secondary); font-variant-numeric: tabular-nums; }
.assign-warning { margin: 8px 0 0; font-size: 0.8rem; line-height: 1.45; color: #fbbf24; }
.assign-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 14px; }
.assign-play { min-width: 96px; }
.assign-text-btn {
    min-height: 44px;
    margin-left: auto;
    padding: 0 4px;
    background: none;
    border: 0;
    color: var(--text-muted);
    font: inherit;
    font-size: 0.8rem;
    text-decoration: underline;
    text-underline-offset: 3px;
    cursor: pointer;
}
.assign-text-btn:hover { color: var(--text-primary); }
.assign-summary-fallback {
    width: 100%;
    margin-top: 10px;
    padding: 10px 12px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    font-size: 0.78rem;
    line-height: 1.5;
    resize: vertical;
}

@media (max-width: 640px) {
    .assign-card { padding: 18px 16px; }
    .assign-goals { grid-template-columns: minmax(0, 1fr); }
    .assign-actions .resume-card-button { flex: 1 1 140px; }
    .assign-text-btn { margin-left: 0; }
}
@media (max-width: 400px) {
    .assign-keys { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
@media (prefers-reduced-motion: reduce) {
    .assign-meter-fill, .assign-goal, .assign-tick, .assign-chevron, .assign-card { transition: none; }
}