/* Monochrome Design System - Rebuilt Sidebar */
:root {
    --bg-primary: #FFFFFF;
    --bg-secondary: #FAFAFA;
    --bg-tertiary: #F5F5F5;
    --border-primary: #E8E8E8;
    --border-secondary: #DADADA;
    --text-primary: #0A0A0A;
    --text-secondary: #606060;
    --text-tertiary: #9E9E9E;
    --hover-bg: #F5F5F5;
    --active-bg: #ECECEC;
    --sidebar-width: 280px;
    --sidebar-collapsed-width: 0px;
}

/* Dark Mode */
body.dark-mode {
    --bg-primary: #171717;
    --bg-secondary: #0A0A0A;
    --bg-tertiary: #202020;
    --border-primary: #2A2A2A;
    --border-secondary: #383838;
    --text-primary: #FAFAFA;
    --text-secondary: #A0A0A0;
    --text-tertiary: #707070;
    --hover-bg: #202020;
    --active-bg: #2A2A2A;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'SF Pro Display', 'Segoe UI', system-ui, sans-serif;
    background: var(--bg-secondary);
    min-height: 100vh;
    color: var(--text-primary);
    font-size: 13px;
    line-height: 1.4;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Main Layout */
.container {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr var(--sidebar-width);
    min-height: 100vh;
    max-height: 100vh;
    padding: 0;
    gap: 0;
    overflow: hidden;
    transition: grid-template-columns 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.container.left-collapsed {
    grid-template-columns: var(--sidebar-collapsed-width) 1fr var(--sidebar-width);
}

.container.right-collapsed {
    grid-template-columns: var(--sidebar-width) 1fr var(--sidebar-collapsed-width);
}

.container.both-collapsed {
    grid-template-columns: var(--sidebar-collapsed-width) 1fr var(--sidebar-collapsed-width);
}

/* =============================================
   REBUILT SIDEBAR STRUCTURE
   ============================================= */

.sidebar {
    background: var(--bg-primary);
    border-right: 1px solid var(--border-primary);
    overflow-y: auto;
    overflow-x: hidden;
    max-height: 100vh;
    position: relative;
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar-right {
    border-right: none;
    border-left: 1px solid var(--border-primary);
}

.sidebar.collapsed {
    transform: translateX(-100%);
    pointer-events: none;
}

.sidebar-right.collapsed {
    transform: translateX(100%);
}

/* Sidebar Header */
.sidebar-header {
    padding: 14px 12px 12px 12px;
    border-bottom: 1px solid var(--border-primary);
    background: var(--bg-primary);
    position: sticky;
    top: 0;
    z-index: 10;
}

.sidebar h1 {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
    letter-spacing: -0.02em;
}

.sidebar .subtitle {
    color: var(--text-tertiary);
    font-size: 10px;
    margin-bottom: 0;
    line-height: 1.3;
    font-weight: 400;
}

.sidebar-content {
    padding: 6px;
}

/* Collapse Toggle Button */
.collapse-toggle {
    position: absolute;
    top: 14px;
    right: 12px;
    width: 20px;
    height: 20px;
    background: transparent;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
    z-index: 11;
}

.collapse-toggle:hover {
    background: var(--hover-bg);
}

.collapse-toggle::before {
    content: '‹';
    font-size: 15px;
    font-weight: 600;
    color: var(--text-tertiary);
}

.sidebar-right .collapse-toggle::before {
    content: '›';
}

/* Floating Toggle Buttons */
.floating-toggle {
    position: fixed;
    top: 12px;
    width: 28px;
    height: 28px;
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: 3px;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
    z-index: 100;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.floating-toggle:hover {
    background: var(--hover-bg);
    border-color: var(--border-secondary);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
}

.floating-toggle-left {
    left: 12px;
}

.floating-toggle-left::before {
    content: '›';
    font-size: 16px;
    font-weight: 600;
    color: var(--text-secondary);
}

.floating-toggle-right {
    right: 12px;
}

.floating-toggle-right::before {
    content: '‹';
    font-size: 16px;
    font-weight: 600;
    color: var(--text-secondary);
}

.floating-toggle.show {
    display: flex;
}

/* =============================================
   SIMPLIFIED CONTROL SECTIONS
   No animations on parent sections!
   ============================================= */

.control-section {
    margin-bottom: 6px;
}

.control-section h3 {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    margin: 0;
    padding: 12px 6px 6px 6px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    user-select: none;
    transition: color 0.15s;
    letter-spacing: 0.03em;
}

.control-section h3:hover {
    color: var(--text-primary);
}

.control-section h3::after {
    content: '▼';
    font-size: 8px;
    color: var(--text-tertiary);
    transition: transform 0.2s;
}

.control-section.collapsed h3::after {
    transform: rotate(-90deg);
}

/* Simple show/hide for section content */
.control-section-content {
    display: block;
    padding: 0 6px 6px 6px;
}

.control-section.collapsed .control-section-content {
    display: none;
}

/* =============================================
   VISUAL ELEMENT CARDS - SIMPLIFIED (NO ACCORDION)
   Just simple always-visible controls
   ============================================= */

.visual-element-card {
    margin-bottom: 10px;
    padding: 8px 6px;
    border-radius: 3px;
    transition: background-color 0.15s;
}

.visual-element-card:hover {
    background: var(--hover-bg);
}

.visual-element-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}

.visual-element-title {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    font-weight: 500;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.visual-element-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
}

.visual-element-toggle input[type="checkbox"] {
    width: 14px;
    height: 14px;
    cursor: pointer;
}

.visual-element-content {
    padding-left: 0;
}

.visual-element-description {
    font-size: 10px;
    color: var(--text-tertiary);
    margin-bottom: 8px;
    font-style: italic;
}

/* =============================================
   FORM CONTROLS
   ============================================= */

/* Control Groups */
.control-group {
    margin-bottom: 10px;
}

.control-group label {
    display: block;
    font-size: 10px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 5px;
    letter-spacing: -0.01em;
}

/* Sliders */
.slider-container {
    display: flex;
    align-items: center;
    gap: 8px;
}

.slider-container input[type="range"] {
    flex: 1;
    height: 3px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    outline: none;
    -webkit-appearance: none;
    cursor: pointer;
}

.slider-container input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    background: var(--text-primary);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.15s;
    border: 2px solid var(--bg-primary);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
}

.slider-container input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

.value-display {
    font-family: 'SF Mono', 'Monaco', 'Cascadia Code', 'Consolas', monospace;
    font-size: 10px;
    color: var(--text-tertiary);
    min-width: 45px;
    text-align: right;
    font-weight: 500;
}

/* Buttons */
.button {
    width: 100%;
    padding: 7px 10px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
    border-radius: 3px;
    font-family: inherit;
    font-size: 11px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    letter-spacing: -0.01em;
}

.button:hover {
    background: var(--hover-bg);
    border-color: var(--border-secondary);
    transform: translateY(-1px);
}

.button:active {
    transform: translateY(0);
    background: var(--active-bg);
}

.button-row {
    display: flex;
    gap: 5px;
}

.button-row .button {
    flex: 1;
}

/* Seed Controls */
.seed-input {
    width: 100%;
    background: var(--bg-tertiary);
    padding: 7px 8px;
    border-radius: 3px;
    font-family: 'SF Mono', 'Monaco', monospace;
    font-size: 11px;
    margin-bottom: 8px;
    border: 1px solid transparent;
    text-align: center;
    color: var(--text-primary);
    transition: all 0.15s;
}

.seed-input:focus {
    outline: none;
    border-color: var(--text-primary);
    background: var(--bg-primary);
}

.seed-controls {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
    margin-bottom: 0;
}

.seed-controls .button {
    margin-bottom: 6px;
}

.seed-controls .regen-button {
    grid-column: 1 / -1;
    margin-bottom: 0;
}

/* Select Inputs */
select {
    width: 100%;
    padding: 7px 8px;
    border-radius: 3px;
    border: 1px solid var(--border-primary);
    font-family: inherit;
    font-size: 11px;
    margin-bottom: 6px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.15s;
}

select:hover {
    border-color: var(--border-secondary);
    background: var(--bg-primary);
}

select:focus {
    outline: none;
    border-color: var(--text-primary);
    background: var(--bg-primary);
}

/* Color Pickers */
.color-group {
    margin-bottom: 10px;
}

.color-group label {
    display: block;
    font-size: 10px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.color-picker-container {
    display: flex;
    align-items: center;
    gap: 8px;
}

.color-picker-container input[type="color"] {
    width: 24px;
    height: 24px;
    border: 1px solid var(--border-primary);
    border-radius: 3px;
    cursor: pointer;
    background: none;
    padding: 0;
    transition: border-color 0.15s;
}

.color-picker-container input[type="color"]:hover {
    border-color: var(--border-secondary);
}

.color-value {
    font-family: 'SF Mono', 'Monaco', monospace;
    font-size: 10px;
    color: var(--text-tertiary);
    font-weight: 500;
}

/* Checkboxes */
input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    border: 1.5px solid var(--border-secondary);
    border-radius: 2px;
    background: var(--bg-primary);
    cursor: pointer;
    position: relative;
    transition: all 0.15s;
}

input[type="checkbox"]:hover {
    border-color: var(--text-secondary);
}

input[type="checkbox"]:checked {
    background: var(--text-primary);
    border-color: var(--text-primary);
}

input[type="checkbox"]:checked::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--bg-primary);
    font-size: 10px;
    font-weight: 700;
}

/* Dark Mode Toggle */
.dark-mode-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 6px;
    margin-bottom: 6px;
    background: transparent;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    transition: all 0.15s;
}

.dark-mode-toggle:hover {
    background: var(--hover-bg);
}

.dark-mode-toggle-label {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.dark-mode-switch {
    position: relative;
    width: 32px;
    height: 18px;
    background: var(--border-secondary);
    border-radius: 9px;
    transition: background 0.25s;
}

body.dark-mode .dark-mode-switch {
    background: var(--text-primary);
}

.dark-mode-switch::before {
    content: '';
    position: absolute;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--bg-primary);
    top: 2px;
    left: 2px;
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

body.dark-mode .dark-mode-switch::before {
    transform: translateX(14px);
}

/* Particle Shapes Grid */
.particle-shapes-grid {
    margin-bottom: 10px;
    padding: 8px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: 3px;
}

.particle-shapes-grid label {
    display: block;
    font-weight: 500;
    margin-bottom: 6px;
    font-size: 10px;
    color: var(--text-secondary);
}

.particle-shapes-grid > div {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5px;
}

.particle-shapes-grid > div > label {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 10px;
    font-weight: 400;
    cursor: pointer;
    color: var(--text-primary);
}

/* Quick Actions */
.quick-actions {
    display: grid;
    grid-template-columns: 1fr;
    gap: 5px;
}

/* Canvas Area */
.canvas-area {
    grid-column: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    min-height: 0;
    overflow: hidden;
    background: var(--bg-secondary);
}

#canvas-container {
    background: var(--bg-primary);
    border-radius: 0;
    box-shadow: none;
    overflow: hidden;
    position: relative;
    max-width: 100%;
    max-height: 100vh;
}

#canvas-container canvas {
    display: block;
    max-width: 100%;
    max-height: 100vh;
    width: auto !important;
    height: auto !important;
}

/* Canvas Hint */
#canvas-container::after {
    content: 'Drag to rotate • Scroll to zoom';
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.75);
    color: white;
    padding: 6px 14px;
    border-radius: 3px;
    font-size: 10px;
    font-weight: 500;
    pointer-events: none;
    opacity: 0;
    animation: fadeInOut 5s ease-in-out;
    letter-spacing: -0.01em;
}

@keyframes fadeInOut {
    0%, 100% { opacity: 0; }
    15%, 85% { opacity: 0.9; }
}

.loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--text-tertiary);
    font-size: 11px;
}

/* Export Modal */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal-overlay.active {
    display: flex;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: 6px;
    border: 1px solid var(--border-primary);
    padding: 20px;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    position: relative;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-primary);
}

.modal-header h2 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: -0.01em;
}

.modal-close {
    background: none;
    border: none;
    font-size: 22px;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 3px;
    transition: all 0.15s;
}

.modal-close:hover {
    background: var(--hover-bg);
    color: var(--text-primary);
}

/* Scrollbar */
.sidebar::-webkit-scrollbar {
    width: 6px;
}

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

.sidebar::-webkit-scrollbar-thumb {
    background: var(--border-secondary);
    border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* Responsive */
@media (max-width: 1400px) {
    :root {
        --sidebar-width: 260px;
    }
}

@media (max-width: 1200px) {
    :root {
        --sidebar-width: 240px;
    }
}