/* Lesson panel, progress, forms and feedback. */



.lesson-area {
    display: grid;
    grid-template-rows: auto auto 1fr;
    gap: 14px;
    padding: 18px;
    min-height: 0;
    max-height: 100vh;
    overflow-y: auto;
    background: var(--surface);
    border-left: 1px solid var(--line);
}

.toolbar,
.toolbar-actions,
.lesson-actions,
.lesson-footer {
    display: flex;
    align-items: center;
    gap: 10px;
}

.toolbar {
    justify-content: space-between;
    min-height: 42px;
    padding-right: 68px;
}

.toolbar-actions {
    flex-wrap: wrap;
    justify-content: flex-end;
}

.lesson-actions {
    flex-wrap: wrap;
}

.toolbar-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--muted);
    font-size: 0.9rem;
}

.toolbar-toggle[hidden] {
    display: none;
}

#progress-text {
    color: var(--muted);
    font-size: 0.95rem;
}

.course-progress {
    display: grid;
    min-width: 0;
    gap: 10px;
    padding-bottom: 12px;
    border-bottom: 1px solid #eceae2;
}

.chapter-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.chapter-button {
    appearance: none;
    display: block;
    width: 2rem;
    height: 8px;
    min-height: 0;
    flex: 0 0 2rem;
    border: 0;
    border-radius: 999px;
    padding: 0;
    background: #e2e2dc;
    transition: background-color 180ms ease, opacity 180ms ease;
}

.chapter-button:hover,
.chapter-button:focus-visible {
    outline: 2px solid var(--gold-dark);
    outline-offset: 2px;
}

.chapter-button.is-complete {
    background: var(--gold);
}

.chapter-button.is-current {
    outline: 2px solid var(--gold-dark);
    outline-offset: 2px;
}

.chapter-button.is-locked,
.chapter-button:disabled {
    cursor: not-allowed;
    opacity: 0.52;
}

.progress-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.progress-dot {
    appearance: none;
    display: block;
    border: 0;
    padding: 0;
    width: 2rem;
    height: 10px;
    flex: 0 0 2rem;
    border-radius: 999px;
    background: #e2e2dc;
    cursor: pointer;
    transition: background-color 180ms ease, opacity 180ms ease;
}

.progress-dot:hover,
.progress-dot:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.progress-dot.is-complete {
    background: var(--accent);
}

.progress-dot.is-current {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.progress-dot.is-locked,
.progress-dot:disabled {
    cursor: not-allowed;
    opacity: 0.55;
}

.lesson-card {
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.lesson-step,
.lesson-label {
    margin: 0 0 6px;
    color: var(--muted);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
}

.lesson-title {
    margin: 0 0 14px;
    color: #171914;
    font-size: clamp(1.4rem, 2vw, 1.6rem);
    line-height: 1.2;
    letter-spacing: -0.018em;
}

.lesson-explanation,
.lesson-reason {
    margin: 0 0 12px;
    max-width: 74ch;
    line-height: 1.6;
}

.lesson-explanation code,
.lesson-reason code,
.feedback-box code,
#lesson-target code {
    font-family: Consolas, monospace;
    font-weight: 700;
}

.lesson-explanation strong,
.lesson-reason strong,
.feedback-box strong,
#lesson-target strong {
    font-weight: 700;
}

.glossary-term {
    border-bottom: 1px dotted var(--muted);
    cursor: help;
}

.lesson-reason {
    color: var(--muted);
}

.accuracy-note,
.lesson-example {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin: 0 0 12px;
    padding: 9px 11px;
    border-left: 4px solid var(--gold);
    border-radius: 0 6px 6px 0;
    background: var(--gold-light);
    color: var(--text);
    line-height: 1.45;
}

.accuracy-note[hidden] {
    display: none;
}

.accuracy-note-label,
.lesson-example .lesson-label {
    margin: 0;
    color: var(--text);
    font-size: inherit;
    font-weight: 700;
    text-transform: none;
}

.accuracy-note-text,
.lesson-example pre {
    display: inline-block;
    max-width: 100%;
    padding: 2px 7px;
    border: 1px solid #eadca6;
    border-right: 4px solid var(--gold);
    border-radius: 3px;
    background: #ffffff;
    font-family: Consolas, monospace;
    font-size: 0.98rem;
    font-weight: 700;
    overflow-wrap: anywhere;
    white-space: pre-wrap;
}

.lesson-example {
    user-select: text;
}

.lesson-example pre {
    margin: 0;
    word-break: break-word;
    user-select: text;
}

.lesson-example code,
.lesson-example strong {
    user-select: text;
}

#lesson-target,
#lesson-target code,
#lesson-target strong,
.accuracy-note,
.accuracy-note * {
    -webkit-user-select: none;
    user-select: none;
}

.lesson-form {
    display: flex;
    flex-direction: column;
    min-height: 0;
    gap: 10px;
}

.profile-form {
    display: grid;
    gap: 14px;
}

.profile-form[hidden] {
    display: none;
}

.profile-name-label,
.profile-interests legend {
    color: var(--muted);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
}

#profile-name {
    width: 100%;
    max-width: 320px;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: #fffefb;
    font: inherit;
    user-select: text;
}

.profile-interests {
    margin: 0;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 6px;
}

.profile-interest-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 8px 12px;
    margin-top: 10px;
}

.profile-interest-options label {
    display: flex;
    align-items: center;
    gap: 8px;
}

#lesson-answer {
    width: 100%;
    min-height: 180px;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 7px;
    resize: vertical;
    overflow: auto;
    background: #fffefb;
    color: var(--text);
    font-family: Consolas, monospace;
    font-size: 1rem;
    flex: 1;
}

#lesson-answer:focus,
#profile-name:focus {
    border-color: var(--accent);
    outline: 3px solid rgba(36, 92, 55, 0.16);
    outline-offset: 0;
}

#lesson-answer:disabled {
    background: #f1f1ed;
    color: var(--muted);
}

.lesson-card.is-review .lesson-form {
    display: flex;
    flex: 1;
    flex-direction: column;
    min-height: 0;
}

.lesson-card.is-review #lesson-answer {
    flex: 1;
    min-height: 320px;
}

.run-state-box {
    margin-top: 12px;
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: var(--surface-soft);
}

.run-state-box pre {
    margin: 0;
    white-space: pre-wrap;
    font-family: Consolas, monospace;
    font-size: 0.95rem;
}

.primary-button,
.secondary-button {
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 9px 13px;
}

.primary-button {
    background: var(--accent);
    border-color: var(--accent);
    color: #ffffff;
}

.secondary-button {
    background: var(--surface);
    color: var(--text);
}

.primary-button:hover:not(:disabled),
.primary-button:focus-visible,
.show-lessons-button:hover,
.show-lessons-button:focus-visible {
    border-color: var(--accent-dark);
    background: var(--accent-dark);
}

.secondary-button:hover:not(:disabled),
.secondary-button:focus-visible {
    border-color: var(--accent);
    background: var(--accent-light);
    color: var(--accent-dark);
}

.primary-button:focus-visible,
.secondary-button:focus-visible,
.show-lessons-button:focus-visible {
    outline: 3px solid rgba(36, 92, 55, 0.24);
    outline-offset: 2px;
}

.primary-button:disabled,
.secondary-button:disabled {
    cursor: not-allowed;
    opacity: 0.45;
}

.primary-button:disabled {
    background: #8c968b;
    border-color: #8c968b;
}

#reset-answer {
    margin-left: auto;
}

.feedback-box {
    display: flex;
    align-items: flex-start;
    gap: 9px;
    min-height: 48px;
    margin-top: 12px;
    padding: 12px;
    border-left: 4px solid transparent;
    border-radius: 0 6px 6px 0;
    background: var(--surface-soft);
    color: var(--muted);
    line-height: 1.45;
}

.feedback-box.is-success {
    border-left-color: var(--accent);
    background: var(--accent-light);
    color: var(--accent);
}

.feedback-box.is-error {
    border-left-color: var(--error);
    background: var(--error-light);
    color: var(--error);
}

.feedback-icon {
    flex: 0 0 auto;
    font-size: 1.05rem;
    font-weight: 800;
    line-height: 1.35;
}

.lesson-footer {
    position: sticky;
    z-index: 4;
    bottom: 0;
    justify-content: space-between;
    margin-top: auto;
    padding-top: 14px;
    padding-bottom: 4px;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.86), var(--surface) 28%);
}