@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    /* Default (Light Theme) */
    --bg-primary: #ffffff;
    --bg-secondary: #f0f2f5;
    --bg-tertiary: #e1e4e8;
    --text-primary: #1a1a2e;
    --text-secondary: #5e6c84;
    --border-color: rgba(0, 0, 0, 0.1);
    --grid-color: rgba(0, 0, 0, 0.1);

    --accent-primary: #00d4ff;
    --accent-secondary: #7b2ff7;
    --accent-gradient: linear-gradient(135deg, #00d4ff 0%, #7b2ff7 100%);

    --success: #00ff94;
    --warning: #ffb800;
    --danger: #ff3366;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.15);
    --glow: 0 0 20px rgba(0, 212, 255, 0.3);
}

[data-theme="dark"] {
    --bg-primary: #0f0f1e;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #252538;
    --text-primary: #ffffff;
    --text-secondary: #b8b8d4;
    --border-color: rgba(0, 212, 255, 0.2);
    --grid-color: rgba(0, 212, 255, 0.05);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
}

/* Header */
.app-header {
    background: #ffffff;
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.app-title {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.app-subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.header-right {
    display: flex;
    gap: var(--spacing-sm);
}

.header-btn {
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.header-btn:hover {
    background: rgba(0, 212, 255, 0.2);
    border-color: var(--accent-primary);
    box-shadow: var(--glow);
    transform: translateY(-2px);
}

.header-btn svg {
    width: 20px;
    height: 20px;
}

/* Main Container */
.main-container {
    display: grid;
    grid-template-columns: 280px 1fr 300px;
    height: calc(100vh - 73px);
    gap: 0;
}

/* Sidebar */
.sidebar {
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    overflow-y: auto;
    overflow-x: hidden;
}

.sidebar::-webkit-scrollbar {
    width: 8px;
}

.sidebar::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

.sidebar::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: var(--radius-sm);
}

.toolbar-section {
    margin-bottom: var(--spacing-xl);
}

.section-title {
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

/* Tool Buttons */
.tool-group,
.camera-group,
.control-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.tool-btn,
.camera-btn,
.control-btn {
    background: var(--bg-tertiary);
    border: 1px solid transparent;
    color: var(--text-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.tool-btn::before,
.camera-btn::before,
.control-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--accent-gradient);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 0;
}

.tool-btn:hover::before,
.camera-btn:hover::before,
.control-btn:hover::before {
    left: 0;
    opacity: 0.1;
}

.tool-btn:hover,
.camera-btn:hover,
.control-btn:hover {
    border-color: var(--accent-primary);
    transform: translateX(4px);
}

.tool-btn.active {
    background: rgba(0, 212, 255, 0.2);
    border-color: var(--accent-primary);
    box-shadow: var(--glow);
}

.tool-btn.active::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--accent-primary);
}

.tool-btn svg,
.camera-btn svg,
.control-btn svg {
    position: relative;
    z-index: 1;
    flex-shrink: 0;
}

.tool-btn span,
.camera-btn span,
.control-btn span {
    position: relative;
    z-index: 1;
}

.camera-btn {
    flex-direction: column;
    padding: var(--spacing-lg);
}

/* Canvas Area */
.canvas-area {
    background: #ffffff;
    display: flex;
    flex-direction: column;
    position: relative;
}

.canvas-controls {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.zoom-controls,
.grid-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.zoom-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.zoom-btn:hover {
    background: rgba(0, 212, 255, 0.2);
    border-color: var(--accent-primary);
    transform: scale(1.1);
}

.zoom-level {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 600;
    min-width: 50px;
    text-align: center;
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--text-secondary);
    user-select: none;
}

.toggle-label input[type="checkbox"] {
    appearance: none;
    width: 40px;
    height: 20px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    position: relative;
    cursor: pointer;
    transition: all 0.3s ease;
}

.toggle-label input[type="checkbox"]::before {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    background: var(--text-secondary);
    border-radius: 50%;
    top: 1px;
    left: 1px;
    transition: all 0.3s ease;
}

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

.toggle-label input[type="checkbox"]:checked::before {
    background: white;
    transform: translateX(20px);
}

.canvas-wrapper {
    flex: 1;
    position: relative;
    overflow: hidden;
    background-image:
        linear-gradient(90deg, var(--grid-color) 1px, transparent 1px),
        linear-gradient(var(--grid-color) 1px, transparent 1px);
    background-size: 20px 20px;
}

#mainCanvas {
    cursor: crosshair;
    image-rendering: crisp-edges;
}

/* Properties Panel */
.properties-panel {
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    overflow-y: auto;
}

.properties-panel::-webkit-scrollbar {
    width: 8px;
}

.properties-panel::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

.properties-panel::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: var(--radius-sm);
}

.property-group {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.property-group:last-child {
    border-bottom: none;
}

.property-group label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.property-group h4 {
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.color-picker-wrapper {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.color-picker-wrapper input[type="color"] {
    width: 60px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    background: transparent;
}

.color-picker-wrapper span {
    color: var(--text-primary);
    font-size: 0.875rem;
    font-family: 'Courier New', monospace;
}

.property-group input[type="range"] {
    width: 100%;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    outline: none;
    margin-bottom: var(--spacing-sm);
    -webkit-appearance: none;
}

.property-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    background: var(--accent-primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

.property-group input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: var(--accent-primary);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

.property-group span {
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 600;
}

.property-btn {
    width: 100%;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.3s ease;
    margin-bottom: var(--spacing-sm);
}

.property-btn:hover {
    background: rgba(0, 212, 255, 0.2);
    border-color: var(--accent-primary);
    transform: scale(1.02);
}

.selection-info {
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
    line-height: 1.6;
}

.project-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.info-item {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

.info-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.info-value {
    color: var(--accent-primary);
    font-size: 0.875rem;
    font-weight: 600;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.toolbar-section,
.property-group {
    animation: fadeIn 0.4s ease;
}

/* Responsive */
@media (max-width: 1400px) {
    .main-container {
        grid-template-columns: 250px 1fr 280px;
    }
}

@media (max-width: 1200px) {
    .main-container {
        grid-template-columns: 220px 1fr 250px;
    }

    .app-subtitle {
        display: none;
    }
}

/* Selection highlights on canvas */
.selection-box {
    stroke: var(--accent-primary);
    stroke-width: 2;
    stroke-dasharray: 5, 5;
    fill: none;
    animation: dashAnimation 0.5s linear infinite;
}

@keyframes dashAnimation {
    to {
        stroke-dashoffset: -10;
    }
}