/* Color Theory Course Styles */

/* ========================================= */
/* LESSON STRUCTURE */
/* ========================================= */

.lesson-section {
    padding: 2rem 0;
}

.lesson-header {
    margin-bottom: 2rem;
}

.lesson-number {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
}

.lesson-title {
    font-family: 'Nunito', sans-serif;
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-light);
    line-height: 1.2;
}

.lesson-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-dark-border), transparent);
    margin: 3rem 0;
}

/* ========================================= */
/* PROSE CONTENT */
/* ========================================= */

.prose-content {
    max-width: 65ch;
    margin-bottom: 2rem;
}

.prose-content p {
    color: var(--color-muted);
    font-size: 1.125rem;
    line-height: 1.75;
    margin-bottom: 1.25rem;
}

.prose-content p strong {
    color: var(--color-light);
    font-weight: 600;
}

.prose-content p em {
    color: var(--color-accent);
    font-style: italic;
}

.prose-content h3 {
    font-family: 'Nunito', sans-serif;
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--color-light);
    margin-top: 2.5rem;
    margin-bottom: 1rem;
}

.prose-content ul,
.prose-content ol {
    color: var(--color-muted);
    font-size: 1.125rem;
    line-height: 1.75;
    margin-bottom: 1.25rem;
    padding-left: 1.5rem;
}

.prose-content li {
    margin-bottom: 0.5rem;
}

.prose-content li strong {
    color: var(--color-light);
}

/* ========================================= */
/* LESSON ASSIGNMENT */
/* ========================================= */

.lesson-assignment {
    background: var(--color-dark-surface);
    border: 1px solid var(--color-dark-border);
    border-radius: 12px;
    padding: 1.5rem;
    margin-top: 2rem;
}

.lesson-assignment h4 {
    font-family: 'Nunito', sans-serif;
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.lesson-assignment p {
    color: var(--color-muted);
    font-size: 1rem;
    line-height: 1.6;
    margin: 0;
}

/* ========================================= */
/* INTERACTIVE CONTAINERS */
/* ========================================= */

.interactive-container {
    background: var(--color-dark-surface);
    border: 1px solid var(--color-dark-border);
    border-radius: 16px;
    overflow: hidden;
    margin: 2rem 0;
}

.interactive-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--color-dark-border);
    background: rgba(0, 0, 0, 0.2);
}

.interactive-label {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    background: rgba(167, 139, 250, 0.1);
    padding: 0.25rem 0.625rem;
    border-radius: 4px;
}

.interactive-title {
    font-family: 'Nunito', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-light);
}

.interactive-content {
    padding: 1.5rem;
}

/* ========================================= */
/* CONTROL BUTTONS */
/* ========================================= */

.control-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-light);
    background: var(--color-dark);
    border: 1px solid var(--color-dark-border);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.control-btn:hover {
    background: var(--color-dark-border);
    border-color: var(--color-muted);
}

.control-btn svg {
    width: 1rem;
    height: 1rem;
}

/* ========================================= */
/* SLIDERS */
/* ========================================= */

.slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 8px;
    background: var(--color-dark-border);
    border-radius: 4px;
    outline: none;
    cursor: pointer;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--color-accent);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
    transition: transform 0.15s;
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--color-accent);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

.slider-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-muted);
    margin-bottom: 0.5rem;
}

.slider-label span {
    color: var(--color-light);
    font-weight: 600;
}

/* Hue slider gradient */
.slider-hue {
    background: linear-gradient(to right,
        hsl(0, 100%, 50%),
        hsl(60, 100%, 50%),
        hsl(120, 100%, 50%),
        hsl(180, 100%, 50%),
        hsl(240, 100%, 50%),
        hsl(300, 100%, 50%),
        hsl(360, 100%, 50%)
    );
}

/* ========================================= */
/* PRESET / EXAMPLE BUTTONS */
/* ========================================= */

.preset-btn,
.example-btn,
.harmony-btn,
.count-btn,
.difficulty-btn {
    padding: 0.5rem 0.875rem;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-muted);
    background: transparent;
    border: 1px solid var(--color-dark-border);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.preset-btn:hover,
.example-btn:hover,
.harmony-btn:hover,
.count-btn:hover,
.difficulty-btn:hover {
    color: var(--color-light);
    border-color: var(--color-muted);
}

.preset-btn.active,
.example-btn.active,
.harmony-btn.active,
.count-btn.active,
.difficulty-btn.active {
    color: var(--color-dark);
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.presets-label,
.examples-label {
    font-size: 0.8125rem;
    color: var(--color-muted);
    margin-right: 0.5rem;
}

/* ========================================= */
/* SIMULTANEOUS CONTRAST DEMO */
/* ========================================= */

.contrast-demo-area {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.contrast-background {
    width: 180px;
    height: 180px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.contrast-bg-warm {
    background-color: #C45C3E;
}

.contrast-bg-cool {
    background-color: #3E7FC4;
}

.contrast-square {
    width: 70px;
    height: 70px;
    background-color: #808080;
    border-radius: 8px;
    cursor: grab;
    transition: box-shadow 0.2s;
}

.contrast-square:active {
    cursor: grabbing;
}

.contrast-square.dragging {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    transform: scale(1.05);
}

.contrast-proof {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    padding: 1rem;
    background: var(--color-dark);
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

.contrast-proof.hidden {
    display: none;
}

.proof-display {
    text-align: center;
}

.proof-label {
    display: block;
    font-size: 0.75rem;
    color: var(--color-muted);
    margin-bottom: 0.25rem;
}

.proof-value {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-accent);
}

.proof-equals {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-light);
}

.contrast-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.contrast-presets {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.contrast-color-picker {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.picker-label {
    font-size: 0.875rem;
    color: var(--color-muted);
}

.color-input {
    -webkit-appearance: none;
    appearance: none;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    background: transparent;
}

.color-input::-webkit-color-swatch-wrapper {
    padding: 0;
}

.color-input::-webkit-color-swatch {
    border: 2px solid var(--color-dark-border);
    border-radius: 8px;
}

.picker-value {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.875rem;
    color: var(--color-muted);
}

/* ========================================= */
/* HSV EXPLORER */
/* ========================================= */

.hsv-layout {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 2rem;
}

@media (max-width: 768px) {
    .hsv-layout {
        grid-template-columns: 1fr;
    }
}

.hsv-controls-panel {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.hsv-swatch {
    width: 100%;
    aspect-ratio: 1;
    max-width: 150px;
    border-radius: 12px;
    background-color: hsl(180, 70%, 50%);
    margin: 0 auto;
}

.hsv-sliders {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.hsv-slider-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.hsv-values {
    display: flex;
    gap: 1rem;
}

.value-display {
    flex: 1;
    padding: 0.75rem;
    background: var(--color-dark);
    border-radius: 8px;
    text-align: center;
}

.value-label {
    display: block;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-muted);
    margin-bottom: 0.25rem;
}

.value-code {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.875rem;
    color: var(--color-light);
}

.hsv-buttons {
    display: flex;
    gap: 0.75rem;
}

.hsv-buttons .control-btn {
    flex: 1;
    justify-content: center;
}

.hsv-composition {
    background: var(--color-dark);
    border-radius: 12px;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hsv-composition svg {
    width: 100%;
    height: 100%;
}

/* ========================================= */
/* VALUE CHECKER */
/* ========================================= */

.value-checker-display {
    background: var(--color-dark);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 1.5rem;
    aspect-ratio: 16/10;
    display: flex;
    align-items: center;
    justify-content: center;
}

.value-checker-display canvas {
    max-width: 100%;
    max-height: 100%;
}

.value-checker-controls {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.saturation-control {
    flex: 1;
}

.value-checker-examples {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* ========================================= */
/* TEMPERATURE SHIFTER */
/* ========================================= */

.temperature-display {
    background: var(--color-dark);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 1.5rem;
}

.temperature-scene {
    width: 100%;
    height: auto;
    display: block;
}

.temperature-controls {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.temperature-slider-group {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.temp-label {
    font-size: 0.8125rem;
    font-weight: 500;
    white-space: nowrap;
}

.temp-cool {
    color: #60A5FA;
}

.temp-warm {
    color: #F97316;
}

.slider-temperature {
    background: linear-gradient(to right, #3B82F6, #9CA3AF, #F97316);
}

.temperature-presets {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* ========================================= */
/* HARMONY BUILDER */
/* ========================================= */

.harmony-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 2rem;
}

@media (max-width: 768px) {
    .harmony-layout {
        grid-template-columns: 1fr;
    }
}

.harmony-wheel-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.25rem;
}

#harmony-wheel {
    cursor: crosshair;
}

.harmony-type-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.harmony-palette {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
}

.harmony-palette .swatch {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    border: 2px solid var(--color-dark-border);
}

.harmony-preview {
    background: var(--color-dark);
    border-radius: 12px;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.harmony-preview svg {
    width: 100%;
    height: 100%;
}

/* ========================================= */
/* PALETTE LIMITER */
/* ========================================= */

.limiter-display {
    background: var(--color-dark);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 1.5rem;
    aspect-ratio: 16/10;
    display: flex;
    align-items: center;
    justify-content: center;
}

.limiter-display canvas {
    max-width: 100%;
    max-height: 100%;
}

.limiter-palette {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.limiter-palette .swatch {
    width: 50px;
    height: 50px;
    border-radius: 8px;
    border: 2px solid var(--color-dark-border);
    cursor: pointer;
    transition: transform 0.15s;
}

.limiter-palette .swatch:hover {
    transform: scale(1.1);
}

.limiter-palette .swatch.selected {
    border-color: var(--color-accent);
}

.limiter-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.color-count-control {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.count-label {
    font-size: 0.875rem;
    color: var(--color-muted);
}

.limiter-examples {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

/* ========================================= */
/* MOOD BUILDER */
/* ========================================= */

.mood-builder-layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 2rem;
}

@media (max-width: 768px) {
    .mood-builder-layout {
        grid-template-columns: 1fr;
    }
}

.mood-steps {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.mood-step {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--color-dark);
    border: 1px solid var(--color-dark-border);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.mood-step:hover {
    border-color: var(--color-muted);
}

.mood-step.active {
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.mood-step.active .step-number,
.mood-step.active .step-label {
    color: var(--color-dark);
}

.mood-step.completed {
    background: rgba(167, 139, 250, 0.2);
    border-color: var(--color-accent);
}

.step-number {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-accent);
    background: rgba(167, 139, 250, 0.2);
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mood-step.active .step-number {
    background: rgba(0, 0, 0, 0.2);
}

.step-label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-muted);
}

.mood-content {
    background: var(--color-dark);
    border-radius: 12px;
    padding: 1.5rem;
    min-height: 200px;
}

.mood-preview-panel {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.mood-preview {
    background: var(--color-dark);
    border-radius: 12px;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.mood-generated-palette {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
}

.mood-generated-palette .swatch {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    border: 2px solid var(--color-dark-border);
}

/* Mood options */
.mood-options {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 0.75rem;
}

.mood-option {
    padding: 1rem;
    background: var(--color-dark-surface);
    border: 1px solid var(--color-dark-border);
    border-radius: 8px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
}

.mood-option:hover {
    border-color: var(--color-muted);
}

.mood-option.selected {
    border-color: var(--color-accent);
    background: rgba(167, 139, 250, 0.1);
}

.mood-option-label {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-light);
}

/* ========================================= */
/* FIX-IT CHALLENGES */
/* ========================================= */

.challenge-selector {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.challenge-difficulty {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.challenge-list {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.challenge-btn {
    padding: 0.5rem 0.875rem;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-muted);
    background: var(--color-dark);
    border: 1px solid var(--color-dark-border);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.challenge-btn:hover {
    color: var(--color-light);
    border-color: var(--color-muted);
}

.challenge-btn.active {
    color: var(--color-dark);
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.challenge-btn.completed {
    border-color: #22C55E;
    color: #22C55E;
}

.challenge-workspace {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 768px) {
    .challenge-workspace {
        grid-template-columns: 1fr;
    }
}

.challenge-display {
    background: var(--color-dark);
    border-radius: 12px;
    overflow: hidden;
    aspect-ratio: 4/3;
    display: flex;
    align-items: center;
    justify-content: center;
}

.challenge-display canvas {
    max-width: 100%;
    max-height: 100%;
}

.challenge-info {
    margin-bottom: 1rem;
}

.challenge-title {
    font-family: 'Nunito', sans-serif;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-light);
    margin-bottom: 0.5rem;
}

.challenge-problem {
    font-size: 0.9375rem;
    color: var(--color-muted);
    margin-bottom: 0.5rem;
}

.challenge-constraint {
    font-size: 0.875rem;
    color: var(--color-accent);
    font-style: italic;
}

.challenge-tools {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1rem;
}

.challenge-actions {
    display: flex;
    gap: 0.75rem;
}

/* ========================================= */
/* COURSE CONCLUSION */
/* ========================================= */

.course-conclusion {
    background: linear-gradient(135deg, rgba(167, 139, 250, 0.1) 0%, rgba(167, 139, 250, 0.02) 100%);
    border: 1px solid var(--color-dark-border);
    border-radius: 16px;
    padding: 2rem;
}

.course-conclusion h2 {
    margin-bottom: 1.5rem;
}

.course-conclusion .prose-content ul {
    list-style: none;
    padding-left: 0;
}

.course-conclusion .prose-content li {
    position: relative;
    padding-left: 1.75rem;
}

.course-conclusion .prose-content li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 600;
}

/* ========================================= */
/* RESPONSIVE ADJUSTMENTS */
/* ========================================= */

@media (max-width: 640px) {
    .contrast-demo-area {
        flex-direction: column;
        align-items: center;
    }

    .contrast-background {
        width: 160px;
        height: 160px;
    }

    .contrast-square {
        width: 60px;
        height: 60px;
    }

    .contrast-controls {
        flex-direction: column;
    }

    .contrast-presets {
        flex-direction: column;
    }

    .lesson-title {
        font-size: 1.5rem;
    }

    .prose-content p,
    .prose-content ul,
    .prose-content ol {
        font-size: 1rem;
    }
}