:root {
    /* Cartoon Cream Theme (Default) */
    --bg-color: #f4f1ea;
    --card-bg: #ffffff;
    --text-color: #333333;
    --text-secondary: #666666;
    --accent-color: #ff6b6b;
    --accent-hover: #ff5252;
    --secondary-color: #4ecdc4;
    --border-color: #e0e0e0;
    --border-width: 2px;
    --border-style: solid;
    --input-border: #333;
    --shadow: 4px 4px 0px rgba(0,0,0,0.1);
    --shadow-hover: 6px 6px 0px rgba(0,0,0,0.15);
    --radius: 12px;
    --header-bg: rgba(255, 255, 255, 0.9);
    --header-border: 2px solid var(--border-color);
    --pattern-color: #d1d1d1;
    --pattern-opacity: 1;
    --sidebar-bg: rgba(255, 255, 255, 0.5);
}

[data-theme="dark"] {
    /* Dark High-End Linear Theme */
    --bg-color: #0a0a0c;
    --card-bg: #141418;
    --text-color: #e0e0e0;
    --text-secondary: #a0a0a0;
    --accent-color: #7d5fff;
    --accent-hover: #6c5ce7;
    --secondary-color: #00cec9;
    --border-color: #2d2d3a;
    --border-width: 1px;
    --border-style: solid;
    --input-border: #555;
    --shadow: 0 4px 20px rgba(0,0,0,0.3);
    --shadow-hover: 0 8px 30px rgba(0,0,0,0.4);
    --radius: 8px;
    --header-bg: rgba(20, 20, 24, 0.85);
    --header-border: 1px solid rgba(255,255,255,0.1);
    --pattern-color: #2d2d3a;
    --pattern-opacity: 0.5;
    --sidebar-bg: rgba(255, 255, 255, 0.02);
}

* {
    box-sizing: border-box;
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
}

body {
    font-family: 'Noto Sans SC', 'Roboto Mono', monospace;
    background-color: var(--bg-color);
    margin: 0;
    padding: 0;
    color: var(--text-color);
    height: 100vh;
    overflow: hidden;
    background-image: radial-gradient(var(--pattern-color) 1px, transparent 1px);
    background-size: 20px 20px;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 15px 30px;
    background: var(--header-bg);
    backdrop-filter: blur(10px);
    border-bottom: var(--header-border);
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

h1 {
    margin: 0;
    font-size: 24px;
    color: var(--text-color);
    letter-spacing: -0.5px;
}

.badge {
    background: var(--accent-color);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    margin-left: 10px;
    vertical-align: middle;
}

/* Theme Switcher */
.theme-switch-wrapper {
    display: flex;
    align-items: center;
}

.theme-switch {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    color: var(--text-color);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.theme-switch:hover {
    background: rgba(0,0,0,0.05);
    transform: scale(1.1);
}

[data-theme="dark"] .theme-switch:hover {
    background: rgba(255,255,255,0.1);
}

.theme-icon {
    width: 24px;
    height: 24px;
    fill: currentColor;
}

.main-container {
    display: flex;
    height: 100vh;
    padding-top: 70px; /* Header height */
    gap: 20px;
    overflow: hidden;
}

/* Sidebar / Workflow Area */
.workflow-area {
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
    background: var(--sidebar-bg);
}

/* Custom Scrollbar */
.workflow-area::-webkit-scrollbar {
    width: 6px;
}
.workflow-area::-webkit-scrollbar-track {
    background: transparent;
}
.workflow-area::-webkit-scrollbar-thumb {
    background: rgba(0,0,0,0.1);
    border-radius: 3px;
}
[data-theme="dark"] .workflow-area::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.1);
}

.workflow-area-left {
    width: 360px;
    min-width: 360px;
    border-right: var(--border-width) solid var(--border-color);
}

.workflow-area-right {
    width: 360px;
    min-width: 360px;
    border-left: var(--border-width) solid var(--border-color);
}

.workflow-card {
    background: var(--card-bg);
    border: var(--border-width) var(--border-style) var(--text-color);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.3s;
    position: relative;
}

[data-theme="dark"] .workflow-card {
    border-color: var(--border-color);
}

.workflow-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

[data-theme="dark"] .workflow-card:hover {
    border-color: var(--accent-color);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    border-bottom: 2px dashed var(--border-color);
    padding-bottom: 10px;
}

[data-theme="dark"] .card-header {
    border-bottom: 1px solid var(--border-color);
}

.card-actions {
    display: flex;
    gap: 8px;
}

.detail-mode-toggle {
    padding: 4px 10px;
    font-size: 12px;
}

.card-title {
    font-weight: 700;
    font-size: 16px;
    display: flex;
    align-items: center;
    color: var(--text-color);
}

.card-number {
    background: var(--text-color);
    color: var(--card-bg);
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 10px;
    font-family: 'Roboto Mono', monospace;
    font-size: 14px;
}

[data-theme="dark"] .card-number {
    background: var(--accent-color);
    color: white;
}

/* Preview Area */
.preview-area {
    flex: 1;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--card-bg); /* Match card bg or transparent? Let's use card bg for clean look */
    position: relative;
}

[data-theme="dark"] .preview-area {
    background: #000; /* Darker for preview area to make canvas pop */
}

.canvas-wrapper {
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    border: 2px solid var(--input-border);
    border-radius: 4px;
    overflow: hidden;
    max-height: 90%;
    max-width: 90%;
    transition: all 0.3s ease;
    background: #fff; /* Canvas should always be on white/checkerboard unless specified */
}

[data-theme="dark"] .canvas-wrapper {
    border-color: #333;
}

canvas {
    display: block;
    height: 100%;
    width: auto;
    max-height: 80vh;
}

/* Controls */
.control-row {
    margin-bottom: 15px;
}

details.advanced-options {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 10px 12px;
    background: rgba(0,0,0,0.02);
    margin-bottom: 15px;
}

[data-theme="dark"] details.advanced-options {
    border: 1px dashed var(--border-color);
    background: rgba(255,255,255,0.02);
}

details.advanced-options summary {
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    list-style: none;
}

details.advanced-options summary::-webkit-details-marker {
    display: none;
}

details.advanced-options[open] summary {
    margin-bottom: 10px;
}

label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 5px;
    color: var(--text-secondary);
}

input[type="range"] {
    width: 100%;
    -webkit-appearance: none;
    background: transparent;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 16px;
    width: 16px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
    margin-top: -6px;
    border: 2px solid #fff;
    box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

[data-theme="dark"] input[type="range"]::-webkit-slider-thumb {
    border: 2px solid var(--card-bg);
}

input[type="range"]::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    cursor: pointer;
    background: #ddd;
    border-radius: 2px;
}

[data-theme="dark"] input[type="range"]::-webkit-slider-runnable-track {
    background: #333;
}

input[type="file"] {
    display: none;
}

.upload-zone {
    width: 100%;
    height: 150px;
    background: rgba(0,0,0,0.02);
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    cursor: pointer;
    overflow: hidden;
    transition: all 0.2s;
}

[data-theme="dark"] .upload-zone {
    background: rgba(255,255,255,0.02);
    border: 1px dashed var(--border-color);
}

.image-close {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: rgba(0,0,0,0.4);
    color: white;
    border: none;
    cursor: pointer;
    font-size: 18px;
    line-height: 26px;
    text-align: center;
    opacity: 0.8;
}

.image-close:hover {
    background: rgba(0,0,0,0.6);
}

.upload-zone:not(.has-image) .image-close {
    display: none;
}

.upload-zone canvas {
    max-width: 100%;
    max-height: 100%;
}

.upload-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    color: var(--text-secondary);
    text-align: center;
    padding: 10px;
    transition: opacity 0.2s;
}

.upload-zone.has-image .upload-placeholder {
    opacity: 0;
}

.upload-zone.drag-active {
    background: var(--card-bg);
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.pen-preview-wrapper {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.pen-actions {
    display: flex;
    gap: 8px;
    margin-top: 6px;
}

.pen-preview-wrapper .mini-action-btn {
    flex: 0 0 auto;
}

.pen-preview-wrapper:not(.has-image) .pen-actions {
    display: none;
}

.control-row.disabled {
    opacity: 0.5;
}

.inline-input {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 6px;
}

.step-row {
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.step-index {
    width: 54px;
    font-size: 12px;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.step-content {
    flex: 1;
}

.inline-input input[type="number"] {
    width: 60px;
    border: none;
    border-bottom: 1px solid var(--input-border);
    text-align: center;
    background: transparent;
    color: var(--text-color);
}

.file-upload-btn {
    display: block;
    width: 100%;
    padding: 10px;
    background: rgba(0,0,0,0.02);
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 14px;
    color: var(--text-secondary);
}

[data-theme="dark"] .file-upload-btn {
    border-width: 1px;
    background: rgba(255,255,255,0.02);
}

.file-upload-btn:hover {
    background: var(--card-bg);
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.action-btn {
    background: var(--text-color);
    color: var(--card-bg);
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    font-family: 'Roboto Mono', monospace;
    box-shadow: 4px 4px 0px rgba(0,0,0,0.2);
    transition: all 0.2s;
}

[data-theme="dark"] .action-btn {
    background: var(--accent-color);
    color: white;
    box-shadow: 0 4px 12px rgba(108, 92, 231, 0.4);
}

.action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 6px 6px 0px rgba(0,0,0,0.25);
}

[data-theme="dark"] .action-btn:hover {
    box-shadow: 0 6px 16px rgba(108, 92, 231, 0.6);
    background: var(--accent-hover);
}

.action-btn:active {
    transform: translateY(0);
    box-shadow: 2px 2px 0px rgba(0,0,0,0.2);
}

[data-theme="dark"] .action-btn:active {
    box-shadow: 0 2px 8px rgba(108, 92, 231, 0.3);
}

.action-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

[data-theme="dark"] .action-btn:disabled {
    background: #333;
    color: #666;
}

.action-row {
    display: flex;
    gap: 10px;
}

.action-row .action-btn {
    width: auto;
    flex: 1;
}

.mini-btn {
    flex: 0 0 80px;
    padding: 8px 10px;
    font-size: 14px;
}

.mini-action-btn {
    width: 100%;
    padding: 8px 10px;
    border: 1px dashed var(--border-color);
    border-radius: 6px;
    background: rgba(0,0,0,0.02);
    cursor: pointer;
    font-size: 13px;
    color: var(--text-secondary);
    transition: all 0.2s;
}

[data-theme="dark"] .mini-action-btn {
    background: rgba(255,255,255,0.02);
}

.mini-action-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    background: var(--card-bg);
}

.mini-preview {
    width: 100%;
    height: 150px;
    background: #f9f9f9;
    border: 1px solid #eee;
    border-radius: 4px;
    margin-top: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.mini-preview canvas {
    max-width: 100%;
    max-height: 100%;
}

.selectable-preview {
    cursor: pointer;
}

.preview-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.45);
    color: white;
    font-size: 13px;
    opacity: 0;
    transition: opacity 0.2s;
    pointer-events: none;
    text-align: center;
    padding: 10px;
}

.selectable-preview:hover .preview-overlay {
    opacity: 1;
}

.drop-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.1);
    color: #333;
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
    text-align: center;
}

.workflow-card.drag-active {
    background: rgba(0,0,0,0.05);
    box-shadow: 0 0 0 2px var(--accent-color);
}

.workflow-card.drag-active .drop-overlay {
    opacity: 1;
}

.pen-marker {
    position: absolute;
    width: 12px;
    height: 12px;
    background: var(--accent-color);
    border: 2px solid white;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    box-shadow: 0 2px 5px rgba(0,0,0,0.3);
    display: none;
}

.status-indicator {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--text-color);
    color: var(--card-bg);
    padding: 10px 20px;
    border-radius: 30px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s;
    z-index: 2000;
}

[data-theme="dark"] .status-indicator {
    background: var(--accent-color);
    color: white;
}

.status-indicator.visible {
    opacity: 1;
    transform: translateY(0);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: #4cd137;
    border-radius: 50%;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(76, 209, 55, 0.4); }
    70% { box-shadow: 0 0 0 6px rgba(76, 209, 55, 0); }
    100% { box-shadow: 0 0 0 0 rgba(76, 209, 55, 0); }
}

.video-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8);
    z-index: 3000;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.video-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.video-container {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 12px;
    max-width: 90%;
    max-height: 90%;
    display: flex;
    flex-direction: column;
    gap: 15px;
    border: 1px solid var(--border-color);
}

.close-overlay {
    position: absolute;
    top: 20px;
    right: 20px;
    color: white;
    font-size: 30px;
    cursor: pointer;
}

.template-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
    z-index: 2500;
    backdrop-filter: blur(5px);
}

.template-modal.active {
    opacity: 1;
    pointer-events: all;
}

.template-modal-content {
    background: var(--card-bg);
    border-radius: 12px;
    width: min(760px, 90vw);
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    padding: 16px;
    gap: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    border: 1px solid var(--border-color);
}

.template-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-color);
}

.template-modal-close {
    border: none;
    background: transparent;
    font-size: 22px;
    cursor: pointer;
    color: var(--text-secondary);
}

.template-modal-close:hover {
    color: var(--text-color);
}

.template-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 12px;
    overflow: auto;
    padding-bottom: 6px;
}

.template-item {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: rgba(0,0,0,0.02);
    padding: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.15s, box-shadow 0.15s;
}

[data-theme="dark"] .template-item {
    background: rgba(255,255,255,0.02);
}

.template-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 14px rgba(0,0,0,0.1);
    border-color: var(--accent-color);
}

.template-item img {
    width: 100%;
    height: 90px;
    object-fit: contain;
    background: white; /* Images often need white bg */
    border-radius: 6px;
}

.pen-tip-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
    z-index: 2600;
    backdrop-filter: blur(5px);
}

.pen-tip-modal.active {
    opacity: 1;
    pointer-events: auto;
}

.pen-tip-content {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    min-width: 280px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    border: 1px solid var(--border-color);
}

.pen-tip-title {
    font-size: 14px;
    color: var(--text-color);
}

.pen-tip-preview {
    background: #f8f9fa;
    border: 1px dashed var(--border-color);
    border-radius: 8px;
    padding: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pen-tip-preview canvas {
    max-width: 100%;
    max-height: 260px;
    cursor: crosshair;
}

.pen-tip-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

.pen-tip-confirm {
    background: var(--text-color);
    color: var(--card-bg);
    border: none;
    padding: 8px 14px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
}

[data-theme="dark"] .pen-tip-confirm {
    background: var(--accent-color);
    color: white;
}

select {
    color: var(--text-color);
}

option {
    background-color: var(--card-bg);
    color: var(--text-color);
}