/* ========================================
   MEMPOOL VISUALIZER STYLES
   ======================================== */

:root {
    --color-brand: #f7931a;
    --color-bg: #1a1a1a;
    --color-surface: #2d2d2d;
    --color-surface-light: #3a3a3a;
    --color-text: #e0e0e0;
    --color-text-dim: #a0a0a0;
    --color-success: #4caf50;
    --color-warning: #ff9800;
    --color-error: #f44336;
    --fee-high: #f44336;
    --fee-medium: #ff9800;
    --fee-low: #4caf50;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
}

/* Layout */
.demo-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    background: var(--color-bg);
    color: var(--color-text);
    min-height: 100vh;
}

/* Header */
.demo-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.breadcrumb {
    font-size: 0.9rem;
    color: var(--color-text-dim);
    margin-bottom: var(--spacing-sm);
}

.breadcrumb a {
    color: var(--color-brand);
    text-decoration: none;
    transition: opacity 0.2s;
}

.breadcrumb a:hover {
    opacity: 0.8;
}

.separator {
    margin: 0 0.5rem;
}

.demo-header h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-brand), #ffb74d);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1.2rem;
    color: var(--color-text-dim);
}

/* Progress Steps */
.progress-steps {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-xl);
    gap: var(--spacing-sm);
    position: relative;
}

.progress-steps::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-surface-light);
    z-index: 0;
}

.step {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    position: relative;
    z-index: 1;
    cursor: pointer;
    transition: all 0.3s;
}

.step-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-surface);
    border: 2px solid var(--color-surface-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    transition: all 0.3s;
}

.step-label {
    font-size: 0.85rem;
    color: var(--color-text-dim);
    text-align: center;
    transition: all 0.3s;
}

.step.active .step-number {
    background: var(--color-brand);
    border-color: var(--color-brand);
    color: var(--color-bg);
    box-shadow: 0 0 20px rgba(247, 147, 26, 0.5);
}

.step.active .step-label {
    color: var(--color-brand);
    font-weight: bold;
}

.step.completed .step-number {
    background: var(--color-success);
    border-color: var(--color-success);
    color: white;
}

/* Learning Steps */
.learning-step {
    display: none;
}

.learning-step.active {
    display: block;
    animation: fadeIn 0.5s;
}

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

/* Explanation Box */
.explanation-box {
    background: var(--color-surface);
    padding: var(--spacing-lg);
    border-radius: 12px;
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid var(--color-brand);
}

.explanation-box h2 {
    color: var(--color-brand);
    margin-bottom: var(--spacing-md);
}

.explanation-box p {
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.key-concept {
    background: var(--color-surface-light);
    padding: var(--spacing-md);
    border-radius: 8px;
    margin-top: var(--spacing-md);
}

.key-concept h3 {
    color: var(--color-brand);
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
}

.key-concept ul {
    list-style-position: inside;
    margin-left: var(--spacing-sm);
}

.key-concept li {
    margin-bottom: var(--spacing-xs);
    line-height: 1.6;
}

/* Visualization Container */
.visualization-container {
    background: var(--color-surface);
    padding: var(--spacing-lg);
    border-radius: 12px;
    margin-bottom: var(--spacing-lg);
}

/* Mempool Visualization */
.mempool-visual {
    background: var(--color-bg);
    border-radius: 12px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.mempool-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-surface-light);
}

.mempool-header h3 {
    color: var(--color-brand);
    margin: 0;
}

.mempool-stats {
    display: flex;
    gap: var(--spacing-lg);
    font-size: 0.9rem;
}

.mempool-stats strong {
    color: var(--color-brand);
}

.mempool-pool {
    min-height: 300px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    padding: var(--spacing-md);
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    align-content: flex-start;
    position: relative;
    overflow: hidden;
}

.mempool-pool.sorted {
    flex-direction: column;
    gap: var(--spacing-xs);
}

/* Transaction Bubbles */
.tx-bubble {
    width: 60px;
    height: 60px;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s;
    animation: popIn 0.3s ease-out;
    position: relative;
}

@keyframes popIn {
    from {
        transform: scale(0);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.tx-bubble:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.tx-bubble.high-fee {
    background: var(--fee-high);
    border: 2px solid #ff6b6b;
}

.tx-bubble.medium-fee {
    background: var(--fee-medium);
    border: 2px solid #ffb74d;
}

.tx-bubble.low-fee {
    background: var(--fee-low);
    border: 2px solid #66bb6a;
}

.tx-bubble .tx-id {
    font-size: 0.6rem;
    opacity: 0.8;
}

.tx-bubble .tx-fee {
    font-weight: bold;
}

/* Sorted Transaction Rows */
.tx-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--color-surface-light);
    border-radius: 8px;
    transition: all 0.3s;
}

.tx-row:hover {
    background: var(--color-surface);
    transform: translateX(5px);
}

.tx-row .tx-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.tx-row.high-fee .tx-indicator {
    background: var(--fee-high);
}

.tx-row.medium-fee .tx-indicator {
    background: var(--fee-medium);
}

.tx-row.low-fee .tx-indicator {
    background: var(--fee-low);
}

.tx-row .tx-details {
    flex: 1;
    display: flex;
    justify-content: space-between;
}

/* Legend */
.legend {
    display: flex;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-surface-light);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.9rem;
}

.color-box {
    width: 20px;
    height: 20px;
    border-radius: 4px;
}

.color-box.high-fee {
    background: var(--fee-high);
}

.color-box.medium-fee {
    background: var(--fee-medium);
}

.color-box.low-fee {
    background: var(--fee-low);
}

/* Block Building Visualization */
.block-building-visual {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.mempool-side,
.block-side {
    background: var(--color-bg);
    border-radius: 12px;
    padding: var(--spacing-md);
}

.mempool-side h3,
.block-side h3 {
    color: var(--color-brand);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.arrow-middle {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding-top: 50px;
}

.arrow-label {
    margin-top: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--color-brand);
    font-weight: bold;
}

/* Block Container */
.block-container {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    padding: var(--spacing-md);
    min-height: 300px;
}

.block-capacity {
    position: relative;
    height: 30px;
    background: var(--color-surface-light);
    border-radius: 8px;
    margin-bottom: var(--spacing-md);
    overflow: hidden;
}

.capacity-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-brand), #ffb74d);
    border-radius: 8px;
    transition: width 0.5s ease-out;
    width: 0%;
}

.capacity-label {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 0.85rem;
    font-weight: bold;
    color: var(--color-text);
    z-index: 1;
    text-shadow: 0 0 4px var(--color-bg);
}

.block-transactions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

/* Controls */
.controls {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-top: var(--spacing-lg);
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-next,
.btn-back,
.btn-check {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary {
    background: var(--color-brand);
    color: var(--color-bg);
}

.btn-primary:hover {
    background: #ffb74d;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(247, 147, 26, 0.4);
}

.btn-secondary {
    background: var(--color-surface-light);
    color: var(--color-text);
    border: 2px solid var(--color-brand);
}

.btn-secondary:hover {
    background: var(--color-surface);
    transform: translateY(-2px);
}

.btn-next,
.btn-back {
    background: var(--color-brand);
    color: var(--color-bg);
    margin-top: var(--spacing-lg);
}

.btn-back {
    background: var(--color-surface-light);
    color: var(--color-text);
}

.navigation-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-top: var(--spacing-xl);
}

/* Interaction Prompt */
.interaction-prompt {
    text-align: center;
    padding: var(--spacing-md);
    background: rgba(247, 147, 26, 0.1);
    border-radius: 8px;
    margin: var(--spacing-lg) 0;
    border: 1px dashed var(--color-brand);
}

.interaction-prompt p {
    margin: 0;
    color: var(--color-brand);
    font-weight: bold;
}

/* Scenario Selector */
.scenario-selector {
    margin-bottom: var(--spacing-lg);
}

.scenario-selector h3 {
    color: var(--color-brand);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.scenario-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.scenario-btn {
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--color-surface-light);
    background: var(--color-surface);
    color: var(--color-text);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: bold;
}

.scenario-btn:hover {
    border-color: var(--color-brand);
    background: var(--color-surface-light);
}

.scenario-btn.active {
    background: var(--color-brand);
    border-color: var(--color-brand);
    color: var(--color-bg);
}

/* Fee Histogram */
.fee-histogram-container {
    margin-bottom: var(--spacing-lg);
}

.fee-histogram-container h3 {
    color: var(--color-brand);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

#fee-histogram {
    display: block;
    margin: 0 auto;
    max-width: 100%;
    background: var(--color-bg);
    border-radius: 8px;
}

.histogram-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.stat {
    background: var(--color-bg);
    padding: var(--spacing-md);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--color-text-dim);
}

.stat-value {
    font-size: 1.3rem;
    font-weight: bold;
    color: var(--color-brand);
}

/* Your Transaction Simulator */
.your-transaction-simulator {
    background: var(--color-bg);
    padding: var(--spacing-lg);
    border-radius: 12px;
}

.your-transaction-simulator h3 {
    color: var(--color-brand);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.tx-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.tx-inputs label {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.tx-inputs input[type="number"],
.tx-inputs input[type="range"] {
    padding: 0.5rem;
    background: var(--color-surface);
    border: 1px solid var(--color-surface-light);
    border-radius: 4px;
    color: var(--color-text);
}

.tx-inputs input[type="range"] {
    width: 100%;
}

.fee-display {
    font-weight: bold;
    color: var(--color-brand);
    font-size: 1.1rem;
}

.tx-results {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.result-item {
    background: var(--color-surface-light);
    padding: var(--spacing-md);
    border-radius: 8px;
    text-align: center;
}

.result-item .label {
    display: block;
    font-size: 0.85rem;
    color: var(--color-text-dim);
    margin-bottom: var(--spacing-xs);
}

.result-item .value {
    display: block;
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--color-brand);
}

.result-item .priority {
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    display: inline-block;
}

.result-item .priority.high {
    background: var(--fee-high);
    color: white;
}

.result-item .priority.medium {
    background: var(--fee-medium);
    color: white;
}

.result-item .priority.low {
    background: var(--fee-low);
    color: white;
}

.mempool-position {
    text-align: center;
}

#position-indicator {
    display: block;
    margin: var(--spacing-md) auto;
    max-width: 100%;
    background: var(--color-surface-light);
    border-radius: 8px;
}

.position-text {
    font-size: 1rem;
    margin-top: var(--spacing-sm);
}

/* Practice Scenarios */
.scenario-quiz {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.quiz-scenario {
    background: var(--color-surface);
    padding: var(--spacing-lg);
    border-radius: 12px;
}

.quiz-scenario h3 {
    color: var(--color-brand);
    margin-bottom: var(--spacing-md);
}

.urgency-info {
    margin: var(--spacing-md) 0;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg);
    border-radius: 8px;
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.urgency-label {
    font-weight: bold;
}

.urgency-value {
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-weight: bold;
}

.urgency-value.high {
    background: var(--fee-high);
    color: white;
}

.urgency-value.low {
    background: var(--fee-low);
    color: white;
}

.current-market {
    background: var(--color-bg);
    padding: var(--spacing-md);
    border-radius: 8px;
    margin-bottom: var(--spacing-lg);
}

.current-market ul {
    margin-top: var(--spacing-sm);
    margin-left: var(--spacing-lg);
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.quiz-option {
    padding: var(--spacing-md);
    background: var(--color-bg);
    border: 2px solid var(--color-surface-light);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.quiz-option:hover {
    border-color: var(--color-brand);
    background: var(--color-surface-light);
}

.quiz-option input[type="radio"] {
    margin-top: 0.25rem;
    cursor: pointer;
}

.option-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.option-content strong {
    color: var(--color-brand);
}

.cost {
    font-size: 0.9rem;
    color: var(--color-text-dim);
}

.btn-check {
    background: var(--color-brand);
    color: var(--color-bg);
}

.feedback {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: 8px;
    font-weight: bold;
}

.feedback.correct {
    background: rgba(76, 175, 80, 0.2);
    border: 2px solid var(--color-success);
    color: var(--color-success);
}

.feedback.incorrect {
    background: rgba(244, 67, 54, 0.2);
    border: 2px solid var(--color-error);
    color: var(--color-error);
}

/* Summary Section */
.summary-container {
    max-width: 1200px;
    margin: 0 auto;
}

.summary-container h2 {
    color: var(--color-brand);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    font-size: 2rem;
}

.takeaway-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.takeaway-card {
    background: var(--color-surface);
    padding: var(--spacing-lg);
    border-radius: 12px;
    text-align: center;
    transition: all 0.3s;
}

.takeaway-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.takeaway-card .icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.takeaway-card h3 {
    color: var(--color-brand);
    margin-bottom: var(--spacing-sm);
}

.takeaway-card p {
    line-height: 1.6;
    color: var(--color-text-dim);
}

.formula-box {
    background: var(--color-surface);
    padding: var(--spacing-lg);
    border-radius: 12px;
    margin-bottom: var(--spacing-xl);
}

.formula-box h3 {
    color: var(--color-brand);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.formula {
    text-align: center;
}

.formula p {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
}

.formula .example {
    font-size: 1rem;
    color: var(--color-text-dim);
    font-style: italic;
}

.best-practices {
    background: var(--color-surface);
    padding: var(--spacing-lg);
    border-radius: 12px;
    margin-bottom: var(--spacing-xl);
}

.best-practices h3 {
    color: var(--color-brand);
    margin-bottom: var(--spacing-md);
}

.best-practices ul {
    list-style: none;
    margin-left: 0;
}

.best-practices li {
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    line-height: 1.6;
}

.next-steps {
    background: var(--color-surface);
    padding: var(--spacing-lg);
    border-radius: 12px;
    margin-bottom: var(--spacing-xl);
}

.next-steps h3 {
    color: var(--color-brand);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.link-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.resource-link {
    background: var(--color-bg);
    padding: var(--spacing-md);
    border-radius: 8px;
    text-decoration: none;
    color: var(--color-text);
    transition: all 0.3s;
    border: 2px solid var(--color-surface-light);
}

.resource-link:hover {
    border-color: var(--color-brand);
    transform: translateY(-3px);
}

.resource-link strong {
    display: block;
    color: var(--color-brand);
    margin-bottom: var(--spacing-xs);
}

.resource-link p {
    font-size: 0.9rem;
    color: var(--color-text-dim);
    margin: 0;
}

.quiz-completion {
    text-align: center;
    background: var(--color-surface);
    padding: var(--spacing-xl);
    border-radius: 12px;
}

.quiz-completion h3 {
    color: var(--color-brand);
    margin-bottom: var(--spacing-md);
}

.quiz-completion button {
    margin: var(--spacing-sm);
}

/* Footer */
.demo-footer {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-surface-light);
    text-align: center;
}

.footer-content p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-dim);
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--color-brand);
    text-decoration: none;
    transition: opacity 0.2s;
}

.footer-links a:hover {
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    .demo-container {
        padding: 1rem;
    }

    .demo-header h1 {
        font-size: 1.8rem;
    }

    .progress-steps {
        flex-wrap: wrap;
    }

    .step-label {
        font-size: 0.7rem;
    }

    .block-building-visual {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto;
    }

    .arrow-middle {
        transform: rotate(90deg);
        padding: var(--spacing-md) 0;
    }

    .tx-inputs,
    .tx-results,
    .histogram-stats {
        grid-template-columns: 1fr;
    }

    .takeaway-grid,
    .link-grid {
        grid-template-columns: 1fr;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}