:root {
    --ui-bg: #0b0c10;
    --ui-panel: #161922;
    --ui-panel-light: #202431;
    --ui-border: #2b3041;
    --ui-text: #e2e8f0;
    --ui-text-muted: #8e9bb5;
    --ui-primary: #7c4dff;
    --ui-primary-hover: #9e75ff;
    --ui-accent: #00f0ff;
    --ui-success: #10b981;
    --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    --padding: 12px;
    --margin: 10px;
    --border-width: 2px;
    --border-style: solid;
    --border-radius: 8px;
    --bg-color: #557a63;
    --border-color: #3a5343;
    --font-family: 'Outfit', sans-serif;
    --font-size: 1rem;
    --letter-spacing: 0px;
    --text-align: left;
    --text-transform: none;
    --text-color: #ffffff;
    --text-shadow-color: #000000;
    --text-shadow-blur: 0px;
    --filter-grayscale: 0%;
    --filter-sepia: 0%;
    --filter-brightness: 100%;
    --filter-contrast: 100%;
    --avatar-offset: -40px;
    --flex-display: flex;
    --flex-direction: row;
    --flex-justify: center;
    --flex-align: center;
    --flex-gap: 10px;
    --flex-wrap: wrap;
    --shadow-blur: 15px;
    --shadow-color: rgba(0, 0, 0, 0.15);
    --shadow-glow: none;
    --hover-transition: 0.3s;
    --hover-scale: 1;
    --hover-translate: 0px;
    --hover-rotate: 0deg;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* body styling removed to support integration */

.css-playground-container {
    display: flex;
    flex-direction: column;
    height: 750px;
    max-width: 100%;
    padding: 16px;
    background-color: var(--ui-bg);
    color: var(--ui-text);
    font-family: var(--font-ui);
    position: relative;
    border-radius: 12px;
}

.app-main {
    display: grid;
    grid-template-columns: 350px 1fr 380px;
    gap: 16px;
    flex-grow: 1;
    height: calc(100vh - 32px);
    min-height: 0;
}

.panel {
    background-color: var(--ui-panel);
    border: 1px solid var(--ui-border);
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    height: 100%;
}

.panel-controls {
    overflow-y: auto;
}

.panel-section {
    padding: 16px;
    border-bottom: 1px solid var(--ui-border);
}

.panel-section:last-child {
    border-bottom: none;
}

.section-title {
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--ui-text-muted);
    margin-bottom: 12px;
}

.panel-title {
    font-size: 1rem;
    font-weight: 600;
    color: #ffffff;
}

.element-selector {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.selector-btn {
    background-color: var(--ui-panel-light);
    border: 1px solid var(--ui-border);
    color: var(--ui-text-muted);
    padding: 10px 8px;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.selector-btn:hover {
    border-color: var(--ui-primary);
    color: #ffffff;
}

.selector-btn.active {
    background: linear-gradient(135deg, var(--ui-primary), #651fff);
    border-color: var(--ui-primary);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(124, 77, 255, 0.25);
}

.presets-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.preset-btn {
    background-color: var(--ui-panel-light);
    border: 1px solid var(--ui-border);
    color: var(--ui-text);
    padding: 8px;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.preset-btn:hover {
    background-color: var(--ui-border);
}

.tabs-section {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    padding: 0;
    min-height: 0;
}

.tabs-header {
    display: flex;
    flex-wrap: wrap;
    background-color: #11131b;
    border-bottom: 1px solid var(--ui-border);
}

.tab-btn {
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--ui-text-muted);
    padding: 12px 14px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s ease;
}

.tab-btn:hover {
    color: #ffffff;
}

.tab-btn.active {
    color: var(--ui-accent);
    border-bottom-color: var(--ui-accent);
    background-color: rgba(0, 240, 255, 0.03);
}

.tabs-content {
    padding: 16px;
    overflow-y: auto;
    flex-grow: 1;
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

.tab-help-text {
    font-size: 0.75rem;
    color: var(--ui-text-muted);
    background-color: var(--ui-panel-light);
    padding: 8px 12px;
    border-radius: 8px;
    margin-bottom: 16px;
    border-left: 3px solid var(--ui-accent);
}

.control-group {
    margin-bottom: 16px;
}

.control-group-title {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--ui-accent);
    margin: 20px 0 10px 0;
    padding-bottom: 4px;
    border-bottom: 1px dashed var(--ui-border);
}

.control-label {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--ui-text);
    margin-bottom: 8px;
}

.value-display {
    color: var(--ui-accent);
    font-weight: 600;
    font-family: 'Share Tech Mono', monospace;
}

.slider {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--ui-panel-light);
    outline: none;
    cursor: pointer;
    transition: background 0.3s;
}

.slider::-webkit-slider-runnable-track {
    width: 100%;
    height: 6px;
    background: var(--ui-panel-light);
    border-radius: 3px;
    border: 1px solid var(--ui-border);
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--ui-primary);
    cursor: pointer;
    margin-top: -6px;
    border: 2px solid #ffffff;
    box-shadow: 0 0 5px rgba(0,0,0,0.5);
    transition: transform 0.1s, background-color 0.2s;
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    background: var(--ui-accent);
}

.row-group {
    display: flex;
    gap: 12px;
}

.col-half {
    flex: 1;
}

.color-picker {
    -webkit-appearance: none;
    border: 1px solid var(--ui-border);
    width: 100%;
    height: 38px;
    border-radius: 8px;
    cursor: pointer;
    background: none;
}

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

.color-picker::-webkit-color-swatch {
    border: none;
    border-radius: 7px;
}

.select-control {
    width: 100%;
    background-color: var(--ui-panel-light);
    border: 1px solid var(--ui-border);
    color: var(--ui-text);
    padding: 10px 12px;
    border-radius: 8px;
    outline: none;
    cursor: pointer;
    font-family: var(--font-ui);
    font-size: 0.85rem;
    transition: border-color 0.2s;
}

.select-control:focus {
    border-color: var(--ui-accent);
}

.button-group {
    display: flex;
    background-color: var(--ui-panel-light);
    border: 1px solid var(--ui-border);
    padding: 2px;
    border-radius: 8px;
}

.group-btn {
    flex: 1;
    background: none;
    border: none;
    color: var(--ui-text-muted);
    padding: 8px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s;
}

.group-btn:hover {
    color: #ffffff;
}

.group-btn.active {
    background-color: var(--ui-panel);
    color: var(--ui-accent);
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}

.toggle-container {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.toggle-container input[type="checkbox"] {
    cursor: pointer;
    accent-color: var(--ui-accent);
    width: 16px;
    height: 16px;
}

.toggle-label {
    font-size: 0.8rem;
    color: var(--ui-text);
    user-select: none;
    cursor: pointer;
}

.panel-preview {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    border-bottom: 1px solid var(--ui-border);
}

.hover-toggle-container {
    display: flex;
    align-items: center;
}

#toggle-hover-simulation {
    display: none;
}

.badge-toggle {
    background-color: var(--ui-panel-light);
    border: 1px solid var(--ui-border);
    color: var(--ui-text-muted);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    user-select: none;
}

#toggle-hover-simulation:checked + .badge-toggle {
    background-color: rgba(240, 0, 127, 0.15);
    border-color: #ff007f;
    color: #ff007f;
    box-shadow: 0 0 10px rgba(255, 0, 127, 0.25);
}

.canvas-viewport {
    flex-grow: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px;
    overflow: auto;
    background-color: #121319;
    background-image: 
        radial-gradient(#1e2130 1px, transparent 1px), 
        radial-gradient(#1e2130 1px, #121319 1px);
    background-size: 20px 20px;
    background-position: 0 0, 10px 10px;
    position: relative;
    min-height: 0;
}

.preview-wrapper {
    display: none;
    width: 100%;
    justify-content: center;
    align-items: center;
}

.preview-wrapper.active {
    display: flex;
}

.button-target {
    padding: var(--padding) calc(var(--padding) * 2);
    margin: var(--margin);
    border-width: var(--border-width);
    border-style: var(--border-style);
    border-radius: var(--border-radius);
    background-color: var(--bg-color);
    border-color: var(--border-color);
    
    font-family: var(--font-family);
    font-size: var(--font-size);
    letter-spacing: var(--letter-spacing);
    text-align: var(--text-align);
    text-transform: var(--text-transform);
    color: var(--text-color);
    text-shadow: 0px 0px var(--text-shadow-blur) var(--text-shadow-color);
    box-shadow: var(--shadow-glow);
    
    transition: transform var(--hover-transition) ease, box-shadow var(--hover-transition) ease, border-color var(--hover-transition) ease, background-color var(--hover-transition) ease;
    cursor: pointer;
}

.button-target:hover,
.preview-wrapper.hover-simulated .button-target {
    transform: scale(var(--hover-scale)) translateY(var(--hover-translate)) rotate(var(--hover-rotate));
    filter: brightness(110%);
}

.card-target {
    width: 100%;
    max-width: 450px;
    border-width: var(--border-width);
    border-style: var(--border-style);
    border-radius: var(--border-radius);
    border-color: var(--border-color);
    overflow: hidden;
    background-color: var(--bg-color);
    box-shadow: var(--shadow-glow);
    
    transition: transform var(--hover-transition) ease, box-shadow var(--hover-transition) ease, border-color var(--hover-transition) ease;
}

.card-target:hover,
.preview-wrapper.hover-simulated .card-target {
    transform: scale(var(--hover-scale)) translateY(var(--hover-translate)) rotate(var(--hover-rotate));
    filter: brightness(102%);
}

.card-cover {
    height: 120px;
    overflow: hidden;
    background-color: rgba(255,255,255,0.05);
}

.card-cover-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(var(--filter-grayscale)) sepia(var(--filter-sepia)) brightness(var(--filter-brightness)) contrast(var(--filter-contrast));
    transition: filter 0.3s;
}

.card-body {
    padding: var(--padding);
    text-align: var(--text-align);
}

.card-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    margin-top: var(--avatar-offset);
    border: 4px solid var(--bg-color);
    box-shadow: 0 4px 10px rgba(0,0,0,0.25);
    background-color: #ffffff;
    position: relative;
    z-index: 2;
    filter: grayscale(var(--filter-grayscale)) sepia(var(--filter-sepia)) brightness(var(--filter-brightness)) contrast(var(--filter-contrast));
    transition: margin-top 0.3s, filter 0.3s;
}

.card-name {
    font-family: var(--font-family);
    font-size: calc(var(--font-size) * 1.4);
    letter-spacing: var(--letter-spacing);
    text-transform: var(--text-transform);
    color: var(--text-color);
    text-shadow: 0px 0px var(--text-shadow-blur) var(--text-shadow-color);
    margin: 8px 0 4px 0;
}

.card-role {
    font-family: var(--font-family);
    font-size: calc(var(--font-size) * 0.95);
    color: var(--ui-accent);
    font-weight: 600;
    margin-bottom: 12px;
    opacity: 0.9;
}

.card-bio {
    font-family: var(--font-family);
    font-size: calc(var(--font-size) * 0.85);
    line-height: 1.5;
    color: var(--text-color);
    opacity: 0.8;
}

.flexbox-target {
    background-color: var(--bg-color);
    border-width: var(--border-width);
    border-style: var(--border-style);
    border-radius: var(--border-radius);
    border-color: var(--border-color);
    padding: var(--padding);
    width: 100%;
    max-width: 500px;
    box-shadow: var(--shadow-glow);
    
    display: var(--flex-display);
    flex-direction: var(--flex-direction);
    justify-content: var(--flex-justify);
    align-items: var(--flex-align);
    gap: var(--flex-gap);
    flex-wrap: var(--flex-wrap);
    
    transition: transform var(--hover-transition) ease, box-shadow var(--hover-transition) ease;
}

.flexbox-target:hover,
.preview-wrapper.hover-simulated .flexbox-target {
    transform: scale(var(--hover-scale)) translateY(var(--hover-translate)) rotate(var(--hover-rotate));
}

.badge-item {
    background-color: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    padding: 6px 12px;
    border-radius: 30px;
    font-size: calc(var(--font-size) * 0.85);
    font-family: var(--font-family);
    color: var(--text-color);
    text-shadow: 0px 0px var(--text-shadow-blur) var(--text-shadow-color);
    white-space: nowrap;
    transition: background-color 0.2s, transform 0.2s;
}

.badge-item:hover {
    background-color: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

.table-target {
    width: 100%;
    max-width: 500px;
    background-color: var(--bg-color);
    border-width: var(--border-width);
    border-style: var(--border-style);
    border-radius: var(--border-radius);
    border-color: var(--border-color);
    border-collapse: separate;
    border-spacing: 0;
    overflow: hidden;
    box-shadow: var(--shadow-glow);
    
    font-family: var(--font-family);
    font-size: calc(var(--font-size) * 0.9);
    color: var(--text-color);
    
    transition: transform var(--hover-transition) ease, box-shadow var(--hover-transition) ease;
}

.table-target:hover,
.preview-wrapper.hover-simulated .table-target {
    transform: scale(var(--hover-scale)) translateY(var(--hover-translate)) rotate(var(--hover-rotate));
}

.table-target th,
.table-target td {
    padding: var(--padding);
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.table-target th {
    background-color: rgba(0, 0, 0, 0.2);
    font-weight: 700;
    border-bottom: 2px solid rgba(255, 255, 255, 0.25);
    text-transform: var(--text-transform);
    letter-spacing: var(--letter-spacing);
}

.table-target tr:last-child td {
    border-bottom: none;
}

.table-target tbody tr {
    transition: background-color 0.2s;
}

.table-target tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.08);
}

.panel-code {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.panel-code .panel-section {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    height: 100%;
    min-height: 0;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    border-bottom: 1px solid var(--ui-border);
}

.copy-btn {
    background-color: var(--ui-primary);
    border: none;
    color: #ffffff;
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
}

.copy-btn:hover {
    background-color: var(--ui-primary-hover);
    box-shadow: 0 4px 10px rgba(124, 77, 255, 0.2);
}

.copy-btn.copied {
    background-color: var(--ui-success);
}

.code-editor-container {
    flex-grow: 1;
    background-color: #0c0d12;
    padding: 16px;
    overflow-y: auto;
    overflow-x: auto;
    min-height: 0;
}

.code-display {
    margin: 0;
    font-family: 'Share Tech Mono', 'Courier New', Courier, monospace;
    font-size: 0.82rem;
    line-height: 1.5;
    color: #a9b2c3;
    tab-size: 4;
}

.code-display code {
    display: block;
    white-space: pre;
}

.explanation-section {
    background-color: #11131b;
    border-top: 1px solid var(--ui-border);
    height: 180px;
    min-height: 180px;
    display: flex;
    flex-direction: column;
}

.explanation-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--ui-border);
}

.info-icon {
    font-size: 1.1rem;
    color: var(--ui-accent);
}

.explanation-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--ui-accent);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.explanation-content {
    padding: 12px 16px;
    font-size: 0.82rem;
    line-height: 1.6;
    color: var(--ui-text-muted);
    overflow-y: auto;
    flex-grow: 1;
}

.explanation-content strong {
    color: #ffffff;
}

.explanation-placeholder {
    font-style: italic;
    color: #555b6e;
}

.explanation-highlight {
    background-color: rgba(0, 240, 255, 0.08);
    color: var(--ui-accent);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Share Tech Mono', monospace;
}

.explanation-tip {
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px dashed var(--ui-border);
    display: flex;
    gap: 6px;
}

.explanation-tip::before {
    content: "💡";
}

@media (max-width: 1100px) {
    .css-playground-container {
        height: auto !important;
    }
    
    .app-main {
        grid-template-columns: 1fr;
        height: auto;
    }
    
    .panel {
        height: 600px;
    }
    
    .panel-preview {
        height: 700px;
    }
}