/* ============================================================
   PLAN7 CONCEPT SECTIONS & ACTIVITIES - NEW STRUCTURE
   ============================================================ */

.plan7-sections-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 10px;
}

.plan7-concept-section {
    border: 1px solid var(--surface-border);
    border-radius: 12px;
    overflow: hidden;
    background: var(--surface-base);
    box-shadow: var(--shadow-soft);
}

.plan7-concept-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px;
    background: var(--surface-elevated);
    border-bottom: 1px solid var(--surface-border);
    cursor: pointer;
    user-select: none;
    transition: background-color 0.2s ease;
}

.plan7-concept-header:hover {
    background: color-mix(in srgb, var(--surface-elevated), var(--surface-hover) 50%);
}

.plan7-concept-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
}

.plan7-concept-toggle {
    font-size: 12px;
    color: var(--text-secondary);
    transition: transform 0.2s ease;
    margin-left: 10px;
}

.plan7-concept-content {
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.plan7-concept-item {
    display: flex;
    gap: 10px;
    line-height: 1.6;
    padding: 12px;
    margin: 12px;
    border-left: 3px solid color-mix(in srgb, var(--accent-primary), transparent 85%);
    background: color-mix(in srgb, var(--surface-base), var(--surface-border) 30%);
    border-radius: 6px;
}

.plan7-concept-label {
    font-weight: 600;
    color: var(--accent-primary);
    min-width: 100px;
    flex-shrink: 0;
    text-transform: uppercase;
    font-size: 11px;
    letter-spacing: 0.08em;
}

.plan7-concept-item span:last-child {
    color: var(--text-primary);
    font-size: 14px;
    flex: 1;
    line-height: 1.6;
}

.plan7-concept-activities {
    margin-top: 6px;
    border-top: 1px solid var(--surface-border);
    padding-top: 12px;
}

.plan7-activity-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 8px;
}

.plan7-activity-info {
    display: flex;
    gap: 10px;
    padding: 12px 14px;
    background: color-mix(in srgb, var(--surface-base), var(--surface-border) 45%);
    border: 1px dashed color-mix(in srgb, var(--surface-border), transparent 20%);
    border-radius: 10px;
    align-items: flex-start;
    box-shadow: none;
    cursor: default;
}

.plan7-activity-info .plan7-activity-type {
    background: color-mix(in srgb, var(--text-secondary), transparent 85%);
    color: var(--text-secondary);
    min-width: 84px;
    height: 30px;
    padding: 0 10px;
}

.plan7-activity-info .plan7-activity-prompt {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.5;
}

.plan7-activity-list + .plan7-concept-label {
    margin-top: 12px;
}

.plan7-activity-item {
    display: flex;
    gap: 10px;
    padding: 11px;
    background: linear-gradient(120deg, color-mix(in srgb, var(--accent-primary), transparent 92%), var(--surface-base));
    border: 1px solid color-mix(in srgb, var(--accent-primary), transparent 70%);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    align-items: flex-start;
    position: relative;
    box-shadow: var(--shadow-soft);
}

.plan7-activity-item:hover {
    border-color: color-mix(in srgb, var(--accent-primary), transparent 60%);
    background: color-mix(in srgb, var(--surface-base), var(--accent-primary) 8%);
    transform: translateY(-1px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.12);
}

.plan7-activity-item::after {
    content: "Open";
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 2px 6px;
    border-radius: 999px;
    border: 1px solid color-mix(in srgb, var(--accent-primary), transparent 50%);
    color: var(--accent-primary);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    background: color-mix(in srgb, var(--accent-primary), transparent 92%);
}

.plan7-activity-item.completed {
    background: color-mix(in srgb, #92c917, transparent 92%);
    border-color: #92c917;
}

.plan7-activity-item.completed .plan7-activity-type {
    background: color-mix(in srgb, #92c917, transparent 75%);
    color: #5a7c1b;
}

.plan7-activity-item.completed .plan7-activity-prompt {
    color: #5a7c1b;
    font-weight: 500;
}

.plan7-activity-type {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 70px;
    height: 28px;
    background: color-mix(in srgb, var(--accent-primary), transparent 90%);
    color: var(--accent-primary);
    border-radius: 6px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    flex-shrink: 0;
}

.plan7-activity-content {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
    min-width: 0;
}

.plan7-activity-prompt {
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.5;
    word-wrap: break-word;
}

.plan7-activity-explanation {
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.5;
    padding: 8px;
    background: color-mix(in srgb, var(--surface-base), var(--surface-border) 50%);
    border-left: 3px solid color-mix(in srgb, var(--accent-primary), transparent 70%);
    border-radius: 4px;
    font-style: italic;
    word-wrap: break-word;
    margin-top: 4px;
}

/* Activity type specific colors - inline styling recommended for dynamic content */
/* These are meant to be used with inline styles based on the activity type */

/* Activity Modal */
.plan7-activity-modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.plan7-activity-modal-box {
    background: var(--surface-elevated);
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 560px;
    width: 90vw;
    max-height: 75vh;
    overflow: auto;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.plan7-activity-modal-header {
    padding: 20px;
    border-bottom: 1px solid var(--surface-border);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
}

.plan7-activity-modal-title {
    flex: 1;
}

.plan7-activity-modal-type {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 70px;
    min-height: 32px;
    background: color-mix(in srgb, var(--accent-primary), transparent 90%);
    color: var(--accent-primary);
    border-radius: 8px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.plan7-activity-modal-title h3 {
    margin: 0;
    font-size: 18px;
    color: var(--text-primary);
    line-height: 1.4;
}

.plan7-activity-modal-subtitle {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
}

.plan7-activity-modal-close {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    min-height: 32px;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.plan7-activity-modal-close:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
}

.plan7-activity-modal-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.plan7-activity-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.plan7-activity-section-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.plan7-activity-section-content {
    padding: 12px;
    background: var(--surface-base);
    border: 1px solid var(--surface-border);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 15px;
    line-height: 1.6;
    word-break: break-word;
}

.plan7-activity-pairs {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.plan7-activity-pair {
    display: flex;
    gap: 10px;
    padding: 10px;
    background: var(--surface-base);
    border: 1px solid var(--surface-border);
    border-radius: 8px;
    font-size: 14px;
    align-items: center;
}

.plan7-activity-pair-left {
    flex: 1;
    font-weight: 500;
    color: var(--text-primary);
}

.plan7-activity-pair-right {
    flex: 1;
    color: var(--text-secondary);
    padding-left: 10px;
    border-left: 2px solid var(--surface-border);
}

.plan7-activity-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.plan7-activity-option {
    padding: 12px;
    background: var(--surface-base);
    border: 1px solid var(--surface-border);
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s ease;
}

.plan7-activity-option:hover {
    border-color: var(--accent-primary);
    background: color-mix(in srgb, var(--surface-base), var(--accent-primary) 5%);
}

.plan7-activity-answer {
    margin-top: 8px;
    padding: 12px;
    background: color-mix(in srgb, #92c917, transparent 90%);
    border: 1px solid color-mix(in srgb, #92c917, transparent 70%);
    border-radius: 8px;
    color: #5a7c1b;
    font-size: 14px;
    line-height: 1.6;
}

.plan7-activity-answer.wrong {
    background: color-mix(in srgb, #e74c3c, transparent 90%);
    border-color: color-mix(in srgb, #e74c3c, transparent 70%);
    color: #8b2f1f;
}

.plan7-activity-modal-actions {
    padding: 16px 20px;
    border-top: 1px solid var(--surface-border);
    display: flex;
    gap: 10px;
}

.plan7-activity-modal-actions button {
    flex: 1;
    padding: 10px 14px;
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.plan7-activity-modal-actions button:hover {
    background: color-mix(in srgb, var(--accent-primary), black 10%);
}

.plan7-activity-modal-actions button:active {
    transform: scale(0.98);
}

/* Interactive Elements */
.plan7-tf-buttons {
    display: flex;
    gap: 10px;
    margin-top: 8px;
}

.plan7-tf-btn {
    flex: 1;
    padding: 12px 16px;
    background: var(--surface-base);
    border: 2px solid var(--surface-border);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.plan7-tf-btn:hover:not(:disabled) {
    border-color: var(--accent-primary);
    background: color-mix(in srgb, var(--surface-base), var(--accent-primary) 10%);
}

.plan7-tf-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.plan7-tf-btn.correct {
    background: color-mix(in srgb, #92c917, transparent 90%);
    border-color: #92c917;
    color: #5a7c1b;
}

.plan7-tf-btn.wrong {
    background: color-mix(in srgb, #e74c3c, transparent 90%);
    border-color: #e74c3c;
    color: #8b2f1f;
}

.plan7-cloze-input-wrap,
.plan7-write-input-wrap {
    display: flex;
    gap: 10px;
    margin-top: 8px;
}

.plan7-cloze-input,
.plan7-write-input {
    flex: 1;
    padding: 12px;
    background: var(--surface-base);
    border: 1px solid var(--surface-border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    transition: all 0.2s ease;
}

.plan7-cloze-input:focus,
.plan7-write-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    background: color-mix(in srgb, var(--surface-base), var(--accent-primary) 5%);
}

.plan7-cloze-input:disabled,
.plan7-write-input:disabled {
    opacity: 0.6;
    background: var(--surface-elevated);
    cursor: not-allowed;
}

.plan7-write-input {
    resize: vertical;
    min-height: 100px;
}

.plan7-check-btn {
    padding: 12px 16px;
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s ease;
}

.plan7-check-btn:hover:not(:disabled) {
    background: color-mix(in srgb, var(--accent-primary), black 10%);
}

.plan7-check-btn:active:not(:disabled) {
    transform: scale(0.98);
}

.plan7-check-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.plan7-check-btn.correct {
    background: #92c917;
}

.plan7-check-btn.wrong {
    background: #e74c3c;
}

.plan7-activity-done-btn {
    flex: 1;
    padding: 12px 16px;
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.plan7-activity-done-btn:hover {
    background: color-mix(in srgb, var(--accent-primary), black 10%);
}

.plan7-activity-done-btn:active {
    transform: scale(0.98);
}

.plan7-mcq-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 8px;
}

.plan7-mcq-option {
    display: flex;
    gap: 12px;
    padding: 12px;
    background: var(--surface-base);
    border: 1px solid var(--surface-border);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    align-items: flex-start;
    text-align: left;
}

.plan7-mcq-option:hover:not(:disabled) {
    border-color: var(--accent-primary);
    background: color-mix(in srgb, var(--surface-base), var(--accent-primary) 10%);
}

.plan7-mcq-option:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.plan7-mcq-option.correct {
    background: color-mix(in srgb, #92c917, transparent 90%);
    border-color: #92c917;
}

.plan7-mcq-option.wrong {
    background: color-mix(in srgb, #e74c3c, transparent 90%);
    border-color: #e74c3c;
}

.plan7-mcq-option-letter {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
    height: 28px;
    background: color-mix(in srgb, var(--accent-primary), transparent 90%);
    color: var(--accent-primary);
    border-radius: 6px;
    font-weight: 600;
    font-size: 12px;
    flex-shrink: 0;
}

.plan7-mcq-option-text {
    color: var(--text-primary);
    font-size: 14px;
    flex: 1;
}

.plan7-match-grid {
    display: flex;
    gap: 20px;
    margin-top: 8px;
    align-items: flex-start;
}

.plan7-match-left,
.plan7-match-right {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.plan7-match-item {
    padding: 10px 12px;
    background: var(--surface-base);
    border: 1px solid var(--surface-border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
}

.plan7-match-item:hover:not(:disabled) {
    border-color: var(--accent-primary);
    background: color-mix(in srgb, var(--surface-base), var(--accent-primary) 10%);
}

.plan7-match-item.selected {
    border-color: var(--accent-primary);
    background: color-mix(in srgb, var(--accent-primary), transparent 85%);
    font-weight: 600;
}

.plan7-match-item.correct {
    background: color-mix(in srgb, #92c917, transparent 90%);
    border-color: #92c917;
    color: #5a7c1b;
}

.plan7-match-item.wrong {
    background: color-mix(in srgb, #e74c3c, transparent 90%);
    border-color: #e74c3c;
    color: #8b2f1f;
}

.plan7-match-item:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* Responsive */
@media (max-width: 480px) {
    .plan7-activity-modal-box {
        width: 95vw;
        max-height: 85vh;
    }

    .plan7-activity-modal-header {
        padding: 16px;
    }

    .plan7-activity-modal-body {
        padding: 16px;
        gap: 12px;
    }

    .plan7-activity-modal-actions {
        flex-direction: column;
    }
}
@media (max-width: 768px) {
    .plan7-concept-header {
        padding: 12px;
    }

    .plan7-concept-content {
        padding: 12px;
        gap: 10px;
    }

    .plan7-concept-title {
        font-size: 14px;
    }

    .plan7-concept-item {
        font-size: 13px;
        gap: 8px;
    }

    .plan7-concept-label {
        min-width: 75px;
    }

    .plan7-activity-item {
        padding: 10px;
        gap: 8px;
    }

    .plan7-activity-type {
        min-width: 60px;
        height: 26px;
        font-size: 10px;
    }
}