/* ============================================
   Playground Page - Styles
   ============================================ */

:root {
    --pg-primary: #8b5cf6;
    --pg-primary-dark: #7c3aed;
    --pg-primary-light: #a78bfa;
    --pg-accent: #22d3ee;
    --pg-success: #10b981;
    --pg-warning: #f59e0b;
    --pg-error: #ef4444;
    --pg-bg-dark: #0a0a0b;
    --pg-bg-main: #111113;
    --pg-bg-panel: #18181b;
    --pg-bg-editor: #1e1e22;
    --pg-bg-elevated: #27272a;
    --pg-border: rgba(255, 255, 255, 0.08);
    --pg-border-hover: rgba(255, 255, 255, 0.15);
    --pg-text-primary: #fafafa;
    --pg-text-secondary: #a1a1aa;
    --pg-text-muted: #71717a;
    --pg-html-color: #e34c26;
    --pg-css-color: #264de4;
    --pg-radius: 8px;
    --pg-radius-lg: 12px;
    --pg-transition: all 0.2s ease;
    --pg-header-height: 56px;
    --pg-status-height: 32px;
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--pg-bg-dark);
    color: var(--pg-text-primary);
    height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* ============================================
   Header
   ============================================ */
.pg-header {
    height: var(--pg-header-height);
    background: var(--pg-bg-panel);
    border-bottom: 1px solid var(--pg-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    flex-shrink: 0;
}

.pg-header-left,
.pg-header-center,
.pg-header-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.pg-header-left {
    flex: 1;
}

.pg-header-right {
    flex: 1;
    justify-content: flex-end;
}

.pg-back-btn {
    width: 36px;
    height: 36px;
    border-radius: var(--pg-radius);
    background: var(--pg-bg-elevated);
    border: 1px solid var(--pg-border);
    color: var(--pg-text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: var(--pg-transition);
}

.pg-back-btn:hover {
    background: var(--pg-bg-editor);
    border-color: var(--pg-primary);
    color: var(--pg-primary);
}

.pg-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--pg-text-primary);
}

.pg-logo i {
    color: var(--pg-primary);
    font-size: 1.25rem;
}

.pg-component-name input {
    background: transparent;
    border: 1px solid transparent;
    color: var(--pg-text-secondary);
    font-size: 0.9rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--pg-radius);
    width: 200px;
    transition: var(--pg-transition);
}

.pg-component-name input:hover {
    background: var(--pg-bg-elevated);
}

.pg-component-name input:focus {
    outline: none;
    background: var(--pg-bg-elevated);
    border-color: var(--pg-primary);
    color: var(--pg-text-primary);
}

/* Layout Switcher */
.pg-layout-switcher {
    display: flex;
    background: var(--pg-bg-elevated);
    border-radius: var(--pg-radius);
    padding: 3px;
    border: 1px solid var(--pg-border);
}

.pg-layout-btn {
    width: 32px;
    height: 28px;
    border: none;
    background: transparent;
    color: var(--pg-text-muted);
    border-radius: 5px;
    cursor: pointer;
    transition: var(--pg-transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.pg-layout-btn:hover {
    color: var(--pg-text-primary);
}

.pg-layout-btn.active {
    background: var(--pg-primary);
    color: white;
}

/* Action Buttons */
.pg-action-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--pg-bg-elevated);
    border: 1px solid var(--pg-border);
    border-radius: var(--pg-radius);
    color: var(--pg-text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--pg-transition);
}

.pg-action-btn:hover {
    background: var(--pg-bg-editor);
    border-color: var(--pg-border-hover);
    color: var(--pg-text-primary);
}

.pg-action-btn.primary {
    background: var(--pg-primary);
    border-color: var(--pg-primary);
    color: white;
}

.pg-action-btn.primary:hover {
    background: var(--pg-primary-dark);
    border-color: var(--pg-primary-dark);
}

.pg-action-btn span {
    display: none;
}

@media (min-width: 768px) {
    .pg-action-btn span {
        display: inline;
    }
}

/* ============================================
   Main Area
   ============================================ */
.pg-main {
    flex: 1;
    display: flex;
    overflow: hidden;
    background: var(--pg-bg-main);
}

/* Horizontal Layout (default) */
.pg-main[data-layout="horizontal"] {
    flex-direction: row;
}

.pg-main[data-layout="horizontal"] .pg-editors {
    width: 50%;
    flex-direction: column;
}

.pg-main[data-layout="horizontal"] .pg-preview-panel {
    width: 50%;
}

.pg-main[data-layout="horizontal"] .pg-resizer {
    width: 6px;
    height: 100%;
    cursor: col-resize;
}

.pg-main[data-layout="horizontal"] .pg-resizer-line {
    width: 2px;
    height: 40px;
}

/* Vertical Layout */
.pg-main[data-layout="vertical"] {
    flex-direction: column;
}

.pg-main[data-layout="vertical"] .pg-editors {
    height: 50%;
    flex-direction: row;
}

.pg-main[data-layout="vertical"] .pg-editor-panel {
    width: 50%;
    border-right: 1px solid var(--pg-border);
    border-bottom: none;
}

.pg-main[data-layout="vertical"] .pg-editor-panel:last-child {
    border-right: none;
}

.pg-main[data-layout="vertical"] .pg-preview-panel {
    height: 50%;
}

.pg-main[data-layout="vertical"] .pg-resizer {
    height: 6px;
    width: 100%;
    cursor: row-resize;
}

.pg-main[data-layout="vertical"] .pg-resizer-line {
    height: 2px;
    width: 40px;
}

/* Preview Only */
.pg-main[data-layout="preview-only"] .pg-editors,
.pg-main[data-layout="preview-only"] .pg-resizer {
    display: none;
}

.pg-main[data-layout="preview-only"] .pg-preview-panel {
    width: 100%;
    height: 100%;
}

/* ============================================
   Editors Panel
   ============================================ */
.pg-editors {
    display: flex;
    background: var(--pg-bg-panel);
    overflow: hidden;
}

.pg-editor-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    border-bottom: 1px solid var(--pg-border);
    overflow: hidden;
    min-height: 100px;
}

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

.pg-editor-panel.minimized {
    flex: 0 0 40px;
    min-height: 40px;
}

.pg-editor-panel.minimized .pg-editor-body {
    display: none;
}

.pg-editor-header {
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 0.75rem;
    background: var(--pg-bg-editor);
    border-bottom: 1px solid var(--pg-border);
    flex-shrink: 0;
}

.pg-editor-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--pg-text-muted);
}

.pg-editor-title span {
    margin-left: 0.25rem;
}

.pg-editor-title i {
    font-size: 1rem;
}

#htmlPanel .pg-editor-title i {
    color: var(--pg-html-color);
}

#cssPanel .pg-editor-title i {
    color: var(--pg-css-color);
}

/* CSS Header accent */
.css-header {
    border-bottom-color: rgba(38, 77, 228, 0.3);
}

.pg-editor-actions {
    display: flex;
    gap: 0.25rem;
}

.pg-editor-btn {
    width: 28px;
    height: 28px;
    border: none;
    background: transparent;
    color: var(--pg-text-muted);
    border-radius: 4px;
    cursor: pointer;
    transition: var(--pg-transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
}

.pg-editor-btn:hover {
    background: var(--pg-bg-elevated);
    color: var(--pg-text-primary);
}

/* Editor Body */
.pg-editor-body {
    flex: 1;
    display: flex;
    overflow: hidden;
    position: relative;
}

.pg-line-numbers {
    width: 45px;
    padding: 1rem 0.5rem;
    background: var(--pg-bg-dark);
    color: var(--pg-text-muted);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    line-height: 1.6;
    text-align: right;
    user-select: none;
    overflow: hidden;
    border-right: 1px solid var(--pg-border);
    white-space: pre;
    flex-shrink: 0;
}

.pg-code-editor {
    flex: 1;
    padding: 1rem;
    background: var(--pg-bg-editor);
    border: none;
    color: var(--pg-text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    resize: none;
    outline: none;
    tab-size: 2;
    white-space: pre;
    overflow: auto;
}

.pg-code-editor::placeholder {
    color: var(--pg-text-muted);
}

.pg-code-editor::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

.pg-code-editor::-webkit-scrollbar-track {
    background: var(--pg-bg-dark);
}

.pg-code-editor::-webkit-scrollbar-thumb {
    background: var(--pg-bg-elevated);
    border-radius: 5px;
}

.pg-code-editor::-webkit-scrollbar-thumb:hover {
    background: var(--pg-text-muted);
}

/* ============================================
   Resizer
   ============================================ */
.pg-resizer {
    background: var(--pg-bg-panel);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s;
    flex-shrink: 0;
}

.pg-resizer:hover {
    background: var(--pg-primary);
}

.pg-resizer-line {
    background: var(--pg-text-muted);
    border-radius: 2px;
}

.pg-resizer:hover .pg-resizer-line {
    background: white;
}

/* ============================================
   Preview Panel
   ============================================ */
.pg-preview-panel {
    display: flex;
    flex-direction: column;
    background: var(--pg-bg-main);
    overflow: hidden;
}

.pg-preview-header {
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 0.75rem;
    background: var(--pg-bg-editor);
    border-bottom: 1px solid var(--pg-border);
    flex-shrink: 0;
}

.pg-preview-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--pg-text-muted);
}

.pg-preview-title span {
    margin-left: 0.25rem;
}

.pg-preview-title i {
    color: var(--pg-success);
}

.pg-preview-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.pg-preview-size {
    display: flex;
    background: var(--pg-bg-elevated);
    border-radius: 4px;
    padding: 2px;
}

.pg-size-btn {
    padding: 0.25rem 0.5rem;
    border: none;
    background: transparent;
    color: var(--pg-text-muted);
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 3px;
    cursor: pointer;
    transition: var(--pg-transition);
}

.pg-size-btn:hover {
    color: var(--pg-text-primary);
}

.pg-size-btn.active {
    background: var(--pg-primary);
    color: white;
}

.pg-preview-body {
    flex: 1;
    overflow: auto;
    background: var(--pg-bg-panel);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    position: relative;
    padding: 1rem;
}

.pg-preview-body::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at center, transparent 0%, var(--pg-bg-panel) 100%),
        linear-gradient(90deg, transparent 49.5%, var(--pg-border) 49.5%, var(--pg-border) 50.5%, transparent 50.5%),
        linear-gradient(0deg, transparent 49.5%, var(--pg-border) 49.5%, var(--pg-border) 50.5%, transparent 50.5%);
    background-size: 100% 100%, 20px 20px, 20px 20px;
    opacity: 0.5;
    pointer-events: none;
}

.pg-preview-container {
    position: relative;
    z-index: 1;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    transform-origin: top center;
    transition: transform 0.2s ease;
}

.pg-preview-container iframe {
    width: 100%;
    height: 100%;
    min-height: 400px;
    border: none;
    background: #0a0a0b;
    border-radius: 8px;
}

/* ============================================
   Status Bar
   ============================================ */
.pg-status-bar {
    height: var(--pg-status-height);
    background: var(--pg-bg-panel);
    border-top: 1px solid var(--pg-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    flex-shrink: 0;
}

.pg-status-left,
.pg-status-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.pg-status-item {
    font-size: 0.75rem;
    color: var(--pg-text-muted);
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.pg-status-dot {
    font-size: 0.5rem;
    color: var(--pg-success);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* ============================================
   Toast
   ============================================ */
.pg-toast {
    position: fixed;
    bottom: 60px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: var(--pg-bg-elevated);
    border: 1px solid var(--pg-success);
    border-radius: var(--pg-radius);
    color: var(--pg-success);
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
}

.pg-toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
    .pg-header {
        padding: 0 0.5rem;
    }
    
    .pg-logo span {
        display: none;
    }
    
    .pg-component-name {
        display: none;
    }
    
    .pg-layout-switcher {
        display: none;
    }
    
    .pg-main[data-layout="horizontal"] {
        flex-direction: column;
    }
    
    .pg-main[data-layout="horizontal"] .pg-editors {
        width: 100%;
        height: 50%;
        flex-direction: row;
    }
    
    .pg-main[data-layout="horizontal"] .pg-editor-panel {
        width: 50%;
        border-right: 1px solid var(--pg-border);
        border-bottom: none;
    }
    
    .pg-main[data-layout="horizontal"] .pg-editor-panel:last-child {
        border-right: none;
    }
    
    .pg-main[data-layout="horizontal"] .pg-preview-panel {
        width: 100%;
        height: 50%;
    }
    
    .pg-main[data-layout="horizontal"] .pg-resizer {
        width: 100%;
        height: 6px;
        cursor: row-resize;
    }
    
    .pg-line-numbers {
        display: none;
    }
    
    .pg-status-right {
        display: none;
    }
}