:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #e2e8f0;
    --secondary-hover: #cbd5e1;
    --danger-color: #ef4444;
    --danger-hover: #dc2626;
    --success-color: #22c55e;
    --warning-color: #f59e0b;
    --info-color: #0ea5e9;
    
    --bg-color: #f8fafc;
    --sidebar-bg: rgba(255, 255, 255, 0.8);
    --card-bg: #ffffff;
    --header-bg: #ffffff;
    --preview-bg: #f1f5f9;
    
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --accent-color: #8b5cf6;
    
    --input-bg: #fafafa;
    --input-border: #e2e8f0;
    --input-focus: #6366f1;
    
    --glass-blur: blur(10px);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    --radius-lg: 12px;
    --radius-md: 8px;
    --radius-sm: 4px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.app-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-color);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease-out, visibility 0.5s ease-out;
}

.app-loader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.loader-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: loader-spin 1s linear infinite;
}

.loader-log {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.loader-log p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-family: 'JetBrains Mono', 'Monaco', 'Cascadia Code', monospace;
    opacity: 0.8;
}

@keyframes loader-spin {
    to { transform: rotate(360deg); }
}

.dark-theme {
    --secondary-color: #1e293b;
    --secondary-hover: #334155;
    --danger-color: #f87171;
    --danger-hover: #ef4444;
    
    --bg-color: #0f172a;
    --sidebar-bg: #0d1117;
    --card-bg: #1e293b;
    --header-bg: #010409;
    --preview-bg: #010409;
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    
    --input-bg: #151b23;
    --input-border: #334155;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* Header Styles */
.app-header {
    height: 70px;
    background-color: var(--header-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 0 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    z-index: 100;
    transition: var(--transition);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary-color);
}

.logo-icon {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn {
    padding: 10px;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: var(--secondary-hover);
}

.btn-danger {
    background-color: #fee2e2;
    color: var(--danger-color);
}

.btn-danger:hover {
    background-color: #fecaca;
}

/* Main Layout */
.builder-container {
    flex: 1;
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 0;
    overflow: hidden;
}

/* Sidebar Styling */
.sidebar {
    background-color: var(--sidebar-bg);
    backdrop-filter: var(--glass-blur);
    border-right: 1px solid var(--border-color);
    padding: 24px;
    overflow-y: auto;
    overflow-x: visible;
    /* Added to keep toggle button visible */
    height: calc(100vh - 70px);
    position: relative;
    min-width: 0;
    transition: var(--transition), width 0.3s ease, padding 0.3s ease;
}

/* Resizer Handle */
.resizer {
    position: absolute;
    top: 0;
    left: 0;
    width: 14px;
    height: 100%;
    cursor: col-resize;
    background: transparent;
    transition: background 0.2s;
    z-index: 1000;
}

.resizer:hover,
.resizing .resizer {
    background: rgba(99, 102, 241, 0.1);
}

.resizer-handle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 9px;
    height: 16px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(3, 1fr);
    gap: 2px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.resizer-handle span {
    background: var(--primary-color);
    border-radius: 50%;
    opacity: 0.8;
}



.logo-wrapper {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header-toggle-btn {
    width: 34px;
    height: 34px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.header-toggle-btn:hover {
    background: var(--secondary-hover);
    color: var(--text-primary);
}

.header-toggle-btn svg {
    transition: transform 0.3s;
}

.header-toggle-btn .icon-open {
    display: none;
}

.header-toggle-btn.collapsed .icon-open {
    display: block;
}

.header-toggle-btn.collapsed .icon-close {
    display: none;
}

.resizing {
    user-select: none;
    cursor: col-resize !important;
}

/* Theme Icons Toggle */
.theme-icon-light { display: none; }
.theme-icon-dark { display: block; }

.dark-theme .theme-icon-light { display: block; }
.dark-theme .theme-icon-dark { display: none; }

body {
    transition: var(--transition);
}

.resizing iframe,
.resizing .preview-iframe-wrapper {
    pointer-events: none;
    transition: none !important;
}

.sidebar h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.sidebar section {
    margin-bottom: 40px;
}

/* Theme List Grid */
.theme-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.theme-skeleton {
    aspect-ratio: 16/9;
    background-color: var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
    position: relative;
}

.theme-card {
    aspect-ratio: 16/9;
    background-color: var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
    position: relative;
}

.theme-card.active {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px var(--primary-color);
}

.theme-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.theme-card .theme-name {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 6px;
    background: rgba(0, 0, 0, 0.6);
    color: white;
    font-size: 0.75rem;
    text-align: center;
}

/* Form Styling */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.form-group input[type="text"],
.form-group input[type="url"],
.form-group textarea {
    width: 100%;
    padding: 12px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    font-size: 0.95rem;
    transition: border-color 0.2s, background-color 0.2s, color 0.2s;
    background: var(--input-bg);
    color: var(--text-primary);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.color-picker-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
}

input[type="color"] {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    background: none;
}

/* Image Upload Styling */
.image-upload {
    width: 100%;
    aspect-ratio: 4/3;
    background: var(--input-bg);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    overflow: hidden;
}

.image-upload:hover {
    border-color: var(--primary-color);
    background: var(--secondary-hover);
}

.upload-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.image-preview {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.hidden {
    display: none;
}

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

.image-upload-small {
    flex: 1;
    aspect-ratio: 9/16;
    background: var(--input-bg);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    overflow: hidden;
    transition: var(--transition);
}

.upload-placeholder-small {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Preview Area */
.preview-area {
    background-color: var(--preview-bg);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    /* Prevent child overflow from affecting layout */
}

.preview-area.mobile {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 24px;
    /* Ensure there is some breathing room */
}

.view-switches,
.action-group {
    background: var(--input-bg);
    border-radius: var(--radius-md);
    padding: 4px;
    display: flex;
    gap: 4px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.view-switches button,
.action-group .btn {
    width: 34px;
    height: 34px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
    padding: 0;
    box-shadow: none !important;
    transform: none !important;
}

.view-switches button.active {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-sm);
}

.view-switches button:hover:not(.active) {
    background: var(--secondary-hover);
}

.preview-iframe-wrapper {
    flex: 1;
    background: white;
    overflow: hidden;
    position: relative;
    transition: width 0.3s ease, height 0.3s ease, border-radius 0.3s ease;
    /* Only animate intentional resizing changes */
}

.preview-area.mobile .preview-iframe-wrapper {
    width: 375px;
    max-width: 100%;
    height: 100%;
    margin: 0;
    flex: none;
    overflow: visible;
}

.mobile-resizer {
    position: absolute;
    top: 0;
    right: -20px;
    width: 20px;
    height: 100%;
    cursor: col-resize;
    display: none;
    z-index: 1001;
    background: transparent;
}

.mobile-resizer:hover {
    background: rgba(99, 102, 241, 0.05);
}

.preview-area.mobile .mobile-resizer {
    display: block;
}

.mobile-resizer .resizer-handle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 9px;
    height: 16px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(3, 1fr);
    gap: 2px;
}

.mobile-resizer .resizer-handle span {
    background: var(--primary-color);
    border-radius: 50%;
    opacity: 0.8;
}

#preview-frame {
    width: 100%;
    height: 100%;
    border: none;
}

/* Color Picker */
.color-picker-wrapper input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

.color-picker-wrapper input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 50%;
}

/* Animations */
@keyframes skeleton-pulse {
    0% {
        background-color: #e2e8f0;
    }

    50% {
        background-color: #cbd5e1;
    }

    100% {
        background-color: #e2e8f0;
    }
}

.theme-skeleton {
    animation: skeleton-pulse 1.5s infinite;
}


.action-group .btn-danger:hover {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

.action-group .btn-primary:hover {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
}

.action-group .btn-secondary:hover {
    background: rgba(0, 0, 0, 0.05);
    color: var(--text-primary);
}