/* Lesson 7: CSS Flexbox - Professional Styling */

/* Import Base Styles */
@import url('../assets/styles.css');

/* ==========================================================================
   Flexbox Playground Styles
   ========================================================================== */

.flexbox-playground {
    background: var(--color-surface);
    border-radius: 16px;
    padding: 2rem;
    border: 2px solid var(--color-border);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.flex-controls {
    background: var(--color-card);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--color-border);
}

.flex-controls h4 {
    margin: 0 0 1rem 0;
    color: var(--color-primary);
    font-size: 1.1rem;
}

.controls-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

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

.control-group label {
    font-weight: 600;
    color: var(--color-text);
    font-size: 0.9rem;
    font-family: var(--font-mono);
}

.control-group select,
.control-group input[type="range"] {
    padding: 0.5rem;
    border: 2px solid var(--color-border);
    border-radius: 6px;
    background: var(--color-background);
    color: var(--color-text);
    font-family: var(--font-mono);
    transition: border-color 0.2s ease;
}

.control-group select:focus,
.control-group input[type="range"]:focus {
    outline: none;
    border-color: var(--color-primary);
}

.control-group input[type="range"] {
    height: 6px;
    background: var(--color-border);
    outline: none;
    border-radius: 3px;
}

.control-group input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
}

.control-group span {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--color-primary);
    font-weight: 600;
}

.item-controls {
    background: var(--color-muted);
    padding: 1rem;
    border-radius: 8px;
    margin-top: 1rem;
}

.item-controls-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.item-hint {
    font-size: 0.85rem;
    color: var(--color-text-light);
    font-style: italic;
    margin-top: 0.5rem;
}

.flex-demo-area {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.flex-container {
    display: flex;
    flex-direction: row;
    justify-content: flex-start;
    align-items: stretch;
    flex-wrap: nowrap;
    gap: 10px;
    background: var(--color-background);
    border: 2px dashed var(--color-primary);
    padding: 1.5rem;
    border-radius: 12px;
    min-height: 200px;
    position: relative;
}

.flex-container::before {
    content: 'Flex Container';
    position: absolute;
    top: -12px;
    left: 1rem;
    background: var(--color-primary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
}

.flex-item {
    background: linear-gradient(135deg, var(--color-secondary), var(--color-accent));
    color: white;
    padding: 1.5rem 1rem;
    border-radius: 8px;
    font-weight: 600;
    text-align: center;
    min-width: 80px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.flex-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.flex-item.selected {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.3);
    transform: scale(1.02);
}

.flex-item.selected::after {
    content: '✓ Selected';
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--color-success);
    color: white;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
}

.css-output {
    background: var(--color-code-bg);
    border-radius: 8px;
    padding: 1.5rem;
    border: 1px solid var(--color-border);
}

.css-output h4 {
    margin: 0 0 1rem 0;
    color: var(--color-text);
    font-size: 1rem;
}

.css-code {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.6;
}

.css-section {
    margin-bottom: 1rem;
}

.css-section strong {
    color: var(--color-primary);
    display: block;
    margin-bottom: 0.5rem;
}

.css-rules {
    color: var(--color-text);
    padding-left: 1rem;
    border-left: 2px solid var(--color-primary);
    margin-left: 0.5rem;
}

/* ==========================================================================
   Pattern Showcase Styles
   ========================================================================== */

.patterns-showcase {
    background: var(--color-surface);
    border-radius: 16px;
    overflow: hidden;
    border: 2px solid var(--color-border);
}

.pattern-tabs {
    display: flex;
    background: var(--color-card);
    border-bottom: 2px solid var(--color-border);
    overflow-x: auto;
}

.pattern-tab {
    padding: 1rem 1.5rem;
    background: none;
    border: none;
    color: var(--color-text-light);
    cursor: pointer;
    font-weight: 600;
    white-space: nowrap;
    transition: all 0.3s ease;
    position: relative;
}

.pattern-tab:hover {
    background: var(--color-muted);
    color: var(--color-text);
}

.pattern-tab.active {
    color: var(--color-primary);
    background: var(--color-background);
}

.pattern-tab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-primary);
}

.pattern-demos {
    padding: 2rem;
}

.pattern-demo {
    display: none;
    animation: fadeIn 0.3s ease;
}

.pattern-demo.active {
    display: block;
}

.demo-container {
    background: var(--color-background);
    border: 2px solid var(--color-border);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    min-height: 200px;
}

.pattern-code {
    background: var(--color-code-bg);
    border-radius: 8px;
    padding: 1.5rem;
    border: 1px solid var(--color-border);
}

.pattern-code code {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--color-text);
}

/* Perfect Centering Pattern */
.center-container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 150px;
    background: linear-gradient(135deg, var(--color-muted), var(--color-surface));
    border-radius: 8px;
}

.centered-content {
    text-align: center;
    padding: 2rem;
    background: var(--color-card);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.centered-content h4 {
    margin: 0 0 0.5rem 0;
    color: var(--color-primary);
}

.centered-content p {
    margin: 0;
    color: var(--color-text-light);
}

/* Navigation Bar Pattern */
.flex-navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: var(--color-primary);
    color: white;
    border-radius: 8px;
}

.nav-brand {
    font-weight: bold;
    font-size: 1.2rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    transition: opacity 0.2s ease;
}

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

.nav-actions {
    display: flex;
    gap: 0.5rem;
}

.nav-actions button {
    padding: 0.5rem 1rem;
    border: 2px solid white;
    background: transparent;
    color: white;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.nav-actions button:hover {
    background: white;
    color: var(--color-primary);
}

/* Cards Pattern */
.cards-container {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.card {
    flex: 1 1 300px;
    background: var(--color-card);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    transition: transform 0.2s ease;
}

.card:hover {
    transform: translateY(-2px);
}

.card h5 {
    margin: 0 0 1rem 0;
    color: var(--color-primary);
}

.card p {
    margin: 0;
    color: var(--color-text-light);
    line-height: 1.5;
}

/* Sidebar Layout Pattern */
.sidebar-layout {
    display: flex;
    gap: 1rem;
    height: 200px;
}

.sidebar-nav {
    flex: 0 0 200px;
    background: var(--color-card);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--color-border);
}

.sidebar-nav h5 {
    margin: 0 0 1rem 0;
    color: var(--color-primary);
}

.sidebar-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.sidebar-nav li {
    padding: 0.5rem 0;
    color: var(--color-text-light);
    border-bottom: 1px solid var(--color-border);
}

.sidebar-nav li:last-child {
    border-bottom: none;
}

.main-content {
    flex: 1;
    background: var(--color-surface);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--color-border);
}

.main-content h5 {
    margin: 0 0 1rem 0;
    color: var(--color-primary);
}

.main-content p {
    margin: 0;
    color: var(--color-text-light);
    line-height: 1.5;
}

/* Sticky Footer Pattern */
.sticky-footer-layout {
    display: flex;
    flex-direction: column;
    min-height: 200px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    overflow: hidden;
}

.page-header {
    background: var(--color-primary);
    color: white;
    padding: 1rem;
    text-align: center;
    font-weight: 600;
}

.page-main {
    flex: 1;
    background: var(--color-surface);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.page-main p {
    margin: 0;
    color: var(--color-text-light);
    text-align: center;
}

.page-footer {
    background: var(--color-card);
    padding: 1rem;
    text-align: center;
    color: var(--color-text-light);
    border-top: 1px solid var(--color-border);
}

/* ==========================================================================
   Comparison Demo Styles
   ========================================================================== */

.comparison-demo {
    background: var(--color-surface);
    border-radius: 16px;
    overflow: hidden;
    border: 2px solid var(--color-border);
}

.comparison-tabs {
    display: flex;
    background: var(--color-card);
    border-bottom: 2px solid var(--color-border);
}

.comparison-tab {
    padding: 1rem 1.5rem;
    background: none;
    border: none;
    color: var(--color-text-light);
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
}

.comparison-tab:hover {
    background: var(--color-muted);
    color: var(--color-text);
}

.comparison-tab.active {
    color: var(--color-primary);
    background: var(--color-background);
}

.comparison-tab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-primary);
}

.comparison-content {
    padding: 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.comparison-demo-area {
    background: var(--color-background);
    border: 2px solid var(--color-border);
    border-radius: 8px;
    padding: 1.5rem;
    position: relative;
    min-height: 200px;
}

.layout-method {
    display: none;
    animation: fadeIn 0.3s ease;
}

.layout-method.active {
    display: block;
}

.method-container {
    height: 150px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    position: relative;
}

.method-item {
    background: linear-gradient(135deg, var(--color-secondary), var(--color-accent));
    color: white;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    border-radius: 6px;
}

/* Flexbox method */
.flex-method {
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 1rem;
}

/* Float method */
.float-method {
    padding: 1rem;
}

.float-item {
    float: left;
    margin-right: 1rem;
}

.clearfix::after {
    content: "";
    display: table;
    clear: both;
}

/* Inline-block method */
.inline-block-method {
    text-align: center;
    padding: 1rem;
}

.inline-block-item {
    display: inline-block;
    margin: 0 0.5rem;
    vertical-align: middle;
}

/* Table method */
.table-method {
    display: table;
    width: 100%;
    height: 100%;
}

.table-item {
    display: table-cell;
    vertical-align: middle;
    text-align: center;
    border: 1px solid rgba(255,255,255,0.2);
}

.method-info {
    background: var(--color-card);
    border-radius: 8px;
    padding: 1.5rem;
    border: 1px solid var(--color-border);
}

.method-info h4 {
    margin: 0 0 1rem 0;
    color: var(--color-primary);
}

.method-info ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.method-info li {
    padding: 0.5rem 0;
    line-height: 1.4;
}

/* ==========================================================================
   Challenge Styles
   ========================================================================== */

.flex-challenge {
    background: var(--color-surface);
    border-radius: 16px;
    border: 2px solid var(--color-border);
    overflow: hidden;
}

.challenge-selector {
    display: flex;
    background: var(--color-card);
    border-bottom: 2px solid var(--color-border);
    overflow-x: auto;
}

.challenge-btn {
    padding: 1rem 1.5rem;
    background: none;
    border: none;
    color: var(--color-text-light);
    cursor: pointer;
    font-weight: 600;
    white-space: nowrap;
    transition: all 0.3s ease;
    position: relative;
}

.challenge-btn:hover {
    background: var(--color-muted);
    color: var(--color-text);
}

.challenge-btn.active {
    color: var(--color-primary);
    background: var(--color-background);
}

.challenge-btn.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-primary);
}

.challenge-content {
    padding: 2rem;
}

.challenge-item {
    display: none;
    animation: fadeIn 0.3s ease;
}

.challenge-item.active {
    display: block;
}

.challenge-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.target-layout,
.user-workspace {
    background: var(--color-card);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--color-border);
}

.target-layout h4,
.user-workspace h4 {
    margin: 0 0 1rem 0;
    color: var(--color-primary);
}

/* Holy Grail Layout Styles */
.target-holy-grail,
.user-holy-grail {
    border: 2px solid var(--color-border);
    border-radius: 8px;
    overflow: hidden;
    height: 200px;
    display: flex;
    flex-direction: column;
}

.target-header,
.user-header {
    background: var(--color-primary);
    color: white;
    padding: 0.5rem;
    text-align: center;
    font-size: 0.9rem;
}

.target-body,
.user-body {
    flex: 1;
    display: flex;
}

.target-nav,
.user-nav {
    flex: 0 0 80px;
    background: var(--color-secondary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
}

.target-main,
.user-main {
    flex: 1;
    background: var(--color-surface);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    font-size: 0.9rem;
}

.target-aside,
.user-aside {
    flex: 0 0 80px;
    background: var(--color-accent);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
}

.target-footer,
.user-footer {
    background: var(--color-card);
    color: var(--color-text);
    padding: 0.5rem;
    text-align: center;
    border-top: 1px solid var(--color-border);
    font-size: 0.9rem;
}

.editable-area {
    background: var(--color-code-bg);
    border: 2px solid var(--color-border);
    border-radius: 8px;
    padding: 1rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.6;
    min-height: 150px;
    color: var(--color-text);
    outline: none;
    white-space: pre;
    overflow: auto;
}

.editable-area:focus {
    border-color: var(--color-primary);
}

.apply-css-btn {
    background: var(--color-primary);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    margin-top: 1rem;
    transition: all 0.2s ease;
}

.apply-css-btn:hover {
    background: var(--color-secondary);
    transform: translateY(-1px);
}

.challenge-result {
    background: var(--color-background);
    border: 2px solid var(--color-border);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.challenge-feedback {
    background: var(--color-card);
    border-radius: 8px;
    padding: 1.5rem;
    border: 1px solid var(--color-border);
    text-align: center;
}

.feedback-score {
    font-weight: 600;
    color: var(--color-primary);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.feedback-message {
    color: var(--color-text-light);
    font-style: italic;
}

/* ==========================================================================
   Quick Reference Styles
   ========================================================================== */

.reference-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.reference-card {
    background: var(--color-card);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    transition: transform 0.2s ease;
}

.reference-card:hover {
    transform: translateY(-2px);
}

.reference-card h4 {
    margin: 0 0 1rem 0;
    color: var(--color-primary);
    font-size: 1.1rem;
}

.reference-card ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.reference-card li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--color-border);
    line-height: 1.4;
    color: var(--color-text-light);
}

.reference-card li:last-child {
    border-bottom: none;
}

.reference-card code {
    font-family: var(--font-mono);
    background: var(--color-muted);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    color: var(--color-primary);
    font-weight: 600;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

@media (max-width: 1200px) {
    .flexbox-playground {
        grid-template-columns: 1fr;
    }
    
    .comparison-content {
        grid-template-columns: 1fr;
    }
    
    .challenge-split {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .controls-grid {
        grid-template-columns: 1fr;
    }
    
    .item-controls-grid {
        grid-template-columns: 1fr;
    }
    
    .pattern-tabs,
    .comparison-tabs,
    .challenge-selector {
        flex-direction: column;
    }
    
    .pattern-tab,
    .comparison-tab,
    .challenge-btn {
        text-align: left;
    }
    
    .reference-grid {
        grid-template-columns: 1fr;
    }
    
    .flex-container {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .cards-container {
        flex-direction: column;
    }
    
    .sidebar-layout {
        flex-direction: column;
        height: auto;
    }
    
    .sidebar-nav {
        flex: none;
    }
    
    .nav-links {
        flex-direction: column;
        gap: 1rem;
    }
}

/* ==========================================================================
   Animation and Transitions
   ========================================================================== */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.02);
    }
}

.flex-item.selected {
    animation: pulse 2s infinite;
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
    .flex-controls,
    .pattern-tabs,
    .comparison-tabs,
    .challenge-selector,
    .apply-css-btn {
        display: none;
    }
    
    .pattern-demo,
    .layout-method,
    .challenge-item {
        display: block !important;
        page-break-inside: avoid;
        margin-bottom: 2rem;
    }
    
    .demo-container {
        border: 2px solid #000;
        background: white !important;
    }
}

/* ==========================================================================
   Dark Mode Enhancements
   ========================================================================== */

@media (prefers-color-scheme: dark) {
    .flex-item {
        box-shadow: 0 2px 8px rgba(0,0,0,0.3);
    }
    
    .flex-item:hover {
        box-shadow: 0 4px 16px rgba(0,0,0,0.4);
    }
    
    .method-container {
        background: rgba(255,255,255,0.02);
    }
    
    .target-holy-grail,
    .user-holy-grail {
        box-shadow: 0 2px 8px rgba(0,0,0,0.3);
    }
}

/* ==========================================================================
   Accessibility Enhancements
   ========================================================================== */

.flex-item:focus,
.pattern-tab:focus,
.comparison-tab:focus,
.challenge-btn:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    .flex-item,
    .reference-card,
    .pattern-demo,
    .layout-method,
    .challenge-item {
        animation: none;
        transition: none;
    }
}