.activity-container {
    max-width: 900px;
    margin: 2rem auto;
    padding: 2rem;
    background: #f9f9f9;
    border-radius: var(--eqn-button-radius-sm);
}

/* Progress Section */
.progress-section {
    margin-bottom: 2rem;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: #666;
}

.progress-percentage {
    font-weight: 600;
}

.progress-bar {
    width: 100%;
    height: 8px;
    border: none;
    border-radius: var(--eqn-button-radius-sm);
    background: #e0e0e0;
}

.progress-bar::-webkit-progress-bar {
    background: #e0e0e0;
    border-radius: var(--eqn-button-radius-sm);
}

.progress-bar::-webkit-progress-value {
    background: #4caf50;
    border-radius: var(--eqn-button-radius-sm);
}

.progress-bar::-moz-progress-bar {
    background: #4caf50;
    border-radius: var(--eqn-button-radius-sm);
}

/* Question Section */
.question-section {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: white;
    border-radius: var(--eqn-button-radius-sm);
    border-left: 4px solid #2196f3;
}

.question-image {
    width: 100%;
    max-height: 300px;
    object-fit: cover;
    border-radius: var(--eqn-button-radius-sm);
    margin-bottom: 1rem;
}

.question-content {
    margin-bottom: 1rem;
}

.question-text {
    font-size: 1.1rem;
    line-height: 1.6;
    color: #333;
    margin-bottom: 1rem;
}

/* Prompt Section */
.prompt-section {
    margin-bottom: 2rem;
    padding: 1rem;
    background: #e3f2fd;
    border-radius: var(--eqn-button-radius-sm);
}

.prompt-text {
    font-size: 1rem;
    color: #1976d2;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

/* Options Section */
.options-section {
    margin-bottom: 2rem;
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.option-button {
    padding: 1.5rem;
    background: white;
    border: 2px solid #ddd;
    border-radius: var(--eqn-button-radius-sm);
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.option-button:hover {
    border-color: #2196f3;
    background: #f5f5f5;
}

.option-button.selected {
    border-color: #4caf50;
    background: #e8f5e9;
    box-shadow: 0 2px 8px rgba(76, 175, 80, 0.2);
}

.option-text {
    font-weight: 500;
    color: #333;
}

.option-audio {
    width: 100%;
    height: 24px;
}

/* Audio Player */
.audio-player {
    width: 100%;
    margin-top: 0.5rem;
}

/* Exercise Section */
.exercise-section {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: #f3e5f5;
    border-radius: var(--eqn-button-radius-sm);
    border-left: 4px solid #9c27b0;
}

.exercise-section h3 {
    color: #6a1b9a;
    margin-bottom: 1rem;
    margin-top: 0;
}

.exercise-step {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: white;
    border-radius: var(--eqn-button-radius-sm);
}

.exercise-step h4 {
    color: #7b1fa2;
    margin-bottom: 0.5rem;
    margin-top: 0;
}

.exercise-step p {
    color: #555;
    line-height: 1.5;
    margin-bottom: 0.5rem;
}

/* Feedback Section */
.feedback-section {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: #e8f5e9;
    border-radius: var(--eqn-button-radius-sm);
    border-left: 4px solid #4caf50;
}

.feedback-content {
    color: #2e7d32;
    line-height: 1.6;
}

.feedback-content p {
    margin-bottom: 0.5rem;
    margin-top: 0;
}

/* Navigation Section */
.navigation-section {
    display: flex;
    gap: 1rem;
    justify-content: space-between;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid #ddd;
}

.nav-button {
    padding: 0.75rem 1.5rem;
    background: #2196f3;
    color: white;
    border: none;
    border-radius: var(--eqn-button-radius-sm);
    cursor: pointer;
    font-size: 1rem;
    transition: background 0.3s ease;
}

.nav-button:hover:not(:disabled) {
    background: #1976d2;
}

.nav-button:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.nav-button.previous {
    margin-right: auto;
}

.nav-button.next,
.nav-button.complete {
    margin-left: auto;
}

.nav-button.complete {
    background: #4caf50;
}

.nav-button.complete:hover {
    background: #45a049;
}

/* CalmInMotionActivity (cim-) — Unique classes to prevent conflicts */

.eqn-constrain-720 .eqn-content {
    padding-bottom: clamp(4rem, 10vh, 8rem);
}

.cim-scenario-section {
    width: 100%;
}

.cim-scenario-text-section {
    margin-bottom: 1.25rem;
}

.cim-scenario-text-block {
    text-align: center;
    font-size: 1.05rem;
    line-height: 1.6;
    color: #1f2937;
}

.cim-scenario-prompt-row {
    margin-bottom: 1.25rem;
    text-align: center;
}

.cim-scenario-prompt-text {
    font-size: 1.1rem;
    line-height: 1.6;
    color: #1f2937;
}

.cim-scenario-options-section {
    margin-top: 0.75rem;
}

/* Options: stack vertically */
.cim-option-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    width: 100%;
}

.cim-option-button {
    display: block;
    width: 100%;
    padding: 1rem 1.25rem;
    text-align: left;
    background: white;
    border: 2px solid #2196f3;
    border-radius: var(--eqn-button-radius-sm);
    color: #0d47a1;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.cim-option-button:hover:not(:disabled) {
    box-shadow: 0 4px 12px rgba(33, 150, 243, 0.15);
    transform: translateY(-2px);
}

.cim-option-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.cim-option-button.ghost {
    opacity: 0.6;
    border-style: dashed;
}

.cim-option-button.revealed {
    opacity: 1;
    border-style: solid;
}

.cim-option-button.incorrect {
    opacity: 0.4;
}

/* Exercise overlay */
.cim-exercise-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.cim-exercise-slide {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

/* Slide 1 */
.cim-slide-image-row {
    margin-bottom: 1.5rem;
    text-align: center;
}

.cim-slide-image-row img {
    max-width: 100%;
    height: auto;
    border-radius: var(--eqn-button-radius-sm);
}

.cim-slide-bottom-bar {
    display: flex;
    justify-content: center;
}

/* Slide 2 */
.cim-slide-top-bar {
    margin-bottom: 1.5rem;
    text-align: center;
}

.cim-blue-btn {
    padding: 0.9rem 1.8rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--eqn-button-radius-sm);
    background: #2196f3 !important;
    color: white !important;
    border: none;
}

.cim-blue-btn:hover:not(:disabled) {
    background: #1976d2 !important;
}

.cim-blue-btn-top {
    width: 100%;
}

/* Exercise steps */
.cim-exercise-steps {
    margin: 1.5rem 0;
}

.cim-exercise-step {
    margin-bottom: 1rem;
    padding: 1rem;
    border-radius: var(--eqn-button-radius-sm);
    background: #f5f5f5;
    transition: all 0.4s ease;
}

.cim-step-yellow {
    background: #fffacd;
    border-left: 4px solid #fbc02d;
}

/* Dimmed state for steps not currently active */
.cim-step-dimmed {
    opacity: 0.4;
    filter: grayscale(60%);
}

/* Active/highlighted state for current step */
.cim-step-active {
    opacity: 1;
    filter: grayscale(0%);
    box-shadow: 0 4px 12px rgba(251, 192, 45, 0.3);
}

.cim-exercise-step h4 {
    margin: 0 0 0.5rem 0;
    color: #333;
    font-weight: 600;
}

.cim-exercise-step p {
    margin: 0;
    color: #555;
    line-height: 1.5;
}

/* Feedback */
.cim-exercise-feedback {
    padding: 1rem;
    border-radius: var(--eqn-button-radius-sm);
    margin: 1.5rem 0;
    background: #e8f5e9;
    transition: all 0.4s ease;
}

.cim-feedback-success {
    border-left: 4px solid #4caf50;
}

.cim-exercise-feedback p {
    margin: 0;
    color: #2e7d32;
    line-height: 1.6;
}

/* Controls */
.cim-exercise-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1.5rem;
}

@media (max-height: 800px) {
    .cim-option-button {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }

    .cim-option-wrapper {
        gap: 0.5rem;
    }
}