/* ==========================================================================
   Google Docs HTML Cleaner - Modern Glassmorphism Stylesheet
   ========================================================================== */

:root {
    /* Color Palette */
    --bg-dark: #090d16;
    --bg-surface: #111827;
    --bg-surface-elevated: #1e293b;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.16);

    /* Accents */
    --primary: #8b5cf6;
    --primary-hover: #7c3aed;
    --primary-glow: rgba(139, 92, 246, 0.25);
    
    --secondary: #06b6d4;
    --secondary-hover: #0891b2;
    --secondary-glow: rgba(6, 182, 212, 0.25);

    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.15);
    --danger: #ef4444;

    /* Text Colors */
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-dim: #64748b;

    /* Typography */
    --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-code: 'Fira Code', monospace;

    /* Spacing & Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    /* Transition Effects */
    --transition: all 0.2s ease-in-out;
}

/* Reset & Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-ui);
    line-height: 1.5;
    min-height: 100vh;
    background-image: 
        radial-gradient(circle at 15% 15%, rgba(139, 92, 246, 0.12) 0%, transparent 40%),
        radial-gradient(circle at 85% 85%, rgba(6, 182, 212, 0.1) 0%, transparent 40%);
    background-attachment: fixed;
}

/* Layout Wrapper */
.app-container {
    max-width: 1500px;
    margin: 0 auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    min-height: 100vh;
}

/* Card Component (Glassmorphism) */
.card {
    background: rgba(17, 24, 39, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
}

/* Header */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.75rem;
    background: rgba(30, 41, 59, 0.5);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 4px 16px var(--primary-glow);
}

.logo-container h1 {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(to right, #ffffff, #cbd5e1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

.subtitle code {
    background: rgba(255, 255, 255, 0.08);
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--secondary);
    font-family: var(--font-code);
    font-size: 0.8rem;
}

.header-actions {
    display: flex;
    gap: 0.75rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 1.1rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    font-family: var(--font-ui);
    cursor: pointer;
    border: 1px solid transparent;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: white;
    box-shadow: 0 4px 12px var(--primary-glow);
}

.btn-primary:hover {
    filter: brightness(1.1);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px var(--primary-glow);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-main);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--border-hover);
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: var(--text-muted);
}

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

/* Rules Toolbar */
.rules-bar {
    padding: 1.25rem 1.5rem;
}

.rules-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.rules-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-main);
}

.rules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 0.85rem;
}

/* Custom Toggle Control */
.toggle-control {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: rgba(255, 255, 255, 0.03);
    padding: 0.6rem 0.85rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    cursor: pointer;
    user-select: none;
    transition: var(--transition);
}

.toggle-control:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--border-hover);
}

.toggle-control input[type="checkbox"] {
    display: none;
}

.toggle-slider {
    position: relative;
    width: 36px;
    height: 20px;
    background-color: #334155;
    border-radius: var(--radius-full);
    transition: var(--transition);
    flex-shrink: 0;
}

.toggle-slider::before {
    content: "";
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    background-color: white;
    border-radius: 50%;
    transition: var(--transition);
}

.toggle-control input:checked + .toggle-slider {
    background-color: var(--primary);
}

.toggle-control input:checked + .toggle-slider::before {
    transform: translateX(16px);
}

.toggle-label {
    font-size: 0.85rem;
    color: var(--text-main);
}

.toggle-label code {
    font-family: var(--font-code);
    color: var(--secondary);
    background: rgba(0, 0, 0, 0.25);
    padding: 1px 4px;
    border-radius: 3px;
    font-size: 0.8rem;
}

/* Badges */
.badge {
    padding: 0.25rem 0.65rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
}

.badge-active {
    background: rgba(139, 92, 246, 0.15);
    color: #a78bfa;
    border: 1px solid rgba(139, 92, 246, 0.3);
}

.badge-success {
    background: var(--success-bg);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

/* Dual Editor Workspace */
.workspace {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    flex: 1;
}

.editors-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
    flex: 1;
    min-height: 480px;
}

@media (max-width: 1024px) {
    .editors-container {
        grid-template-columns: 1fr;
    }
}

.editor-pane {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.pane-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.2);
}

.pane-title {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}

.pane-title h2 {
    font-size: 0.95rem;
    font-weight: 600;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.dot-input {
    background-color: var(--secondary);
    box-shadow: 0 0 8px var(--secondary);
}

.dot-output {
    background-color: var(--primary);
    box-shadow: 0 0 8px var(--primary);
}

.pane-controls {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

/* View Tabs */
.view-tabs {
    display: flex;
    background: rgba(0, 0, 0, 0.3);
    padding: 3px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.tab-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem 0.65rem;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn.active {
    background: var(--bg-surface-elevated);
    color: var(--text-main);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

/* Textarea / Code Editor Wrapper */
.editor-wrapper {
    position: relative;
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 360px;
}

textarea {
    width: 100%;
    height: 100%;
    flex: 1;
    padding: 1.25rem;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-main);
    font-family: var(--font-code);
    font-size: 0.88rem;
    line-height: 1.6;
    resize: none;
    tab-size: 2;
}

textarea::placeholder {
    color: var(--text-dim);
}

#output-html {
    background: rgba(0, 0, 0, 0.15);
}

/* Live Render Preview Container */
.preview-frame {
    width: 100%;
    height: 100%;
    flex: 1;
    padding: 1.5rem;
    background: #ffffff;
    color: #1e293b;
    overflow-y: auto;
    font-family: var(--font-ui);
    line-height: 1.6;
}

.preview-frame p {
    margin-bottom: 1em;
}

.preview-frame h1, .preview-frame h2, .preview-frame h3 {
    margin-top: 1.2em;
    margin-bottom: 0.6em;
}

/* Pane Footer / Stats */
.pane-footer {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 0.65rem 1.25rem;
    background: rgba(0, 0, 0, 0.25);
    border-top: 1px solid var(--border-color);
    font-size: 0.78rem;
    color: var(--text-muted);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.stat-value {
    font-family: var(--font-code);
    font-weight: 600;
    color: var(--text-main);
}

.text-accent {
    color: var(--secondary);
}

/* Footer / Help */
.app-footer {
    padding: 1.25rem 1.75rem;
}

.footer-info h3 {
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.footer-info ul {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 0.5rem 1.5rem;
    list-style: none;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-info li strong {
    color: var(--text-main);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.toast {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.75rem 1.25rem;
    background: rgba(30, 41, 59, 0.95);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: white;
    font-size: 0.85rem;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    animation: toastIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.toast-success {
    border-left: 4px solid var(--success);
}

.toast-info {
    border-left: 4px solid var(--secondary);
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateY(12px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Scrollbar Customization */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.25);
}