:root {
    --bg-dark: #1A1A2E;
    --surface: #24243E;
    --surface-glass: rgba(36, 36, 62, 0.7);
    --border: #3A3A5E;
    
    --primary: #F59E0B;
    --primary-hover: #D97706;
    --secondary: #FBBF24;
    --accent: #EF4444;
    
    --text-main: #F3F4F6;
    --text-muted: #9CA3AF;
    --text-dim: #6B7280;
    
    --radius-lg: 12px;
    --radius-md: 8px;
    --radius-sm: 4px;
    
    --transition: 200ms ease;
    --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.theme-light {
    --bg-dark: #F3F4F6;
    --surface: #FFFFFF;
    --surface-glass: rgba(255, 255, 255, 0.8);
    --border: #E5E7EB;
    
    --primary: #D97706;
    --primary-hover: #B45309;
    --secondary: #F59E0B;
    --accent: #DC2626;
    
    --text-main: #111827;
    --text-muted: #4B5563;
    --text-dim: #9CA3AF;
}

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

body {
    font-family: 'Inter', system-ui, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.5;
    transition: background-color var(--transition), color var(--transition);
}

.top-header {
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    background: var(--surface-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo h1 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

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

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Layout */
.container {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 2rem;
    padding: 2rem;
    max-width: 1600px;
    margin: 0 auto;
    height: calc(100vh - 70px);
}

.sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.sidebar::-webkit-scrollbar,
.preview-container::-webkit-scrollbar,
.template-list::-webkit-scrollbar {
    width: 6px;
}
.sidebar::-webkit-scrollbar-track,
.preview-container::-webkit-scrollbar-track,
.template-list::-webkit-scrollbar-track {
    background: transparent;
}
.sidebar::-webkit-scrollbar-thumb,
.preview-container::-webkit-scrollbar-thumb,
.template-list::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

.panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    box-shadow: var(--shadow-subtle);
}

.panel h2 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.badge {
    background: var(--primary);
    color: #fff;
    padding: 0.1rem 0.5rem;
    border-radius: 10px;
    font-size: 0.75rem;
    font-weight: 600;
}

.desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

/* Search Area */
.search-box {
    position: relative;
    margin-bottom: 1rem;
}

.search-box svg {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-box input {
    width: 100%;
    background: rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    color: var(--text-main);
    font-family: inherit;
    font-size: 0.9rem;
    transition: var(--transition);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary);
}

/* Categories */
.categories {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.cat-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    cursor: pointer;
    transition: var(--transition);
}

.cat-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
}

.cat-btn.active {
    background: rgba(245, 158, 11, 0.15);
    color: var(--primary);
    border-color: var(--primary);
}

/* Template Lists */
.template-list, .active-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-height: 250px;
    overflow-y: auto;
}

.active-list {
    max-height: none;
    overflow: visible;
}

.t-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background: rgba(0,0,0,0.15);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    user-select: none;
}

.t-item:hover {
    border-color: var(--primary);
    background: rgba(245, 158, 11, 0.05);
}

.t-item .name {
    font-weight: 500;
    font-size: 0.9rem;
}

.t-item .cat {
    font-size: 0.7rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.t-item .action {
    color: var(--primary);
    font-size: 1.25rem;
    line-height: 1;
}

.active-item {
    background: rgba(245, 158, 11, 0.1);
    border-color: var(--primary);
}

.active-item .action {
    color: var(--accent);
    transform: rotate(45deg); /* turns + into x visually */
}

/* Custom textarea */
#customRulesInput {
    width: 100%;
    min-height: 100px;
    background: rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 0.75rem;
    color: var(--text-main);
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: 0.85rem;
    resize: vertical;
}

#customRulesInput:focus {
    outline: none;
    border-color: var(--primary);
}

/* Preview Section */
.preview-section {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: var(--shadow-subtle);
}

.preview-header {
    height: 60px;
    padding: 0 1.5rem;
    background: rgba(0,0,0,0.2);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.preview-header h2 {
    font-size: 1rem;
    font-weight: 600;
}

.preview-header code {
    color: var(--primary);
    font-family: monospace;
    font-size: 0.95rem;
}

.preview-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.file-size {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.preview-container {
    flex: 1;
    overflow: auto;
    padding: 1.5rem;
    background-color: rgba(0,0,0,0.1);
}

.preview-container pre {
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: 0.875rem;
    color: var(--text-muted);
    white-space: pre-wrap;
    word-break: break-all;
}

.preview-container pre span.comment {
    color: #4CAF50; /* Greenish for comments */
}

.preview-container pre span.rule {
    color: var(--text-main);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.btn-sm {
    padding: 0.25rem 0.75rem;
    font-size: 0.8rem;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}
.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-secondary {
    background: var(--secondary);
    color: #111;
}
.btn-secondary:hover {
    background: #EAB308;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-main);
}
.btn-outline:hover {
    background: rgba(255,255,255,0.05);
}

.btn-icon {
    background: transparent;
    padding: 0.5rem;
    color: var(--text-muted);
}
.btn-icon:hover {
    color: var(--primary);
    background: rgba(245, 158, 11, 0.1);
}

/* Toast */
.toast {
    position: fixed;
    bottom: -50px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: #fff;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-lg);
    font-weight: 500;
    box-shadow: 0 10px 25px rgba(245, 158, 11, 0.3);
    transition: bottom 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 1000;
}

.toast.show {
    bottom: 2rem;
}

/* Drag sorting */
.dragging {
    opacity: 0.5;
    background: rgba(245, 158, 11, 0.2);
    border-color: var(--primary);
}

@media (max-width: 900px) {
    .container {
        grid-template-columns: 1fr;
        height: auto;
    }
    .preview-section {
        min-height: 500px;
    }
}