:root {
    --bg-main: #0B0E14;
    --grid-color: rgba(255, 255, 255, 0.04);
    --glass-bg: rgba(15, 17, 26, 0.85);
    --glass-border: 1px solid rgba(255, 255, 255, 0.08);
    --accent: #00ffcc;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    overflow: hidden;
    touch-action: none; 
}

#canvasViewport {
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    overflow: hidden; /* Hide scrollbars, JS controls scroll */
    cursor: grab;
}
#canvasViewport:active {
    cursor: grabbing;
}

canvas {
    display: block;
    cursor: crosshair;
    background-color: var(--bg-main);
    background-image: 
        linear-gradient(var(--grid-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
    background-size: 40px 40px;
    background-position: left top;
    box-shadow: 0 0 50px rgba(0,0,0,0.5); /* Edge boundary visual */
    transform-origin: top left;
    transition: transform 0.15s cubic-bezier(0.2, 0, 0, 1);
}

/* Sidebar Toggle Button */
.gallery-toggle {
    position: fixed;
    top: 30px;
    left: 40px; /* Aligned with Vertical Dock */
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: var(--glass-border);
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: 0 5px 20px rgba(0,0,0,0.5);
    z-index: 90;
    transition: all 0.2s;
}
.gallery-toggle:hover {
    background: rgba(255,255,255,0.05);
    transform: scale(1.05);
}

/* Glassmorphism Sidebar */
.gallery-sidebar {
    position: fixed;
    top: 0;
    left: -350px;
    width: 350px;
    height: 100vh;
    background: rgba(15, 17, 26, 0.95);
    backdrop-filter: blur(20px);
    border-right: var(--glass-border);
    box-shadow: 10px 0 30px rgba(0,0,0,0.8);
    z-index: 200;
    transition: left 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    flex-direction: column;
}

.gallery-sidebar.open {
    left: 0;
}

.sidebar-header {
    padding: 20px 25px;
    border-bottom: var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sidebar-header h3 { font-weight: 600; color: #fff; }

.close-sidebar {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    transition: color 0.1s;
}
.close-sidebar:hover { color: #ef4444; }

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.sidebar-content::-webkit-scrollbar { width: 6px; }
.sidebar-content::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 3px; }

.gallery-loading {
    grid-column: span 2;
    text-align: center;
    color: var(--text-secondary);
    margin-top: 50px;
}

.gallery-item {
    background: #000;
    border: var(--glass-border);
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.2s, border-color 0.2s;
    aspect-ratio: 1;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.8;
    transition: opacity 0.2s;
}

.gallery-item:hover {
    transform: translateY(-3px);
    border-color: var(--accent);
}
.gallery-item:hover img { opacity: 1; }

.hidden { display: none !important; }

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(5px);
    z-index: 300;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-box {
    background: rgba(20, 24, 33, 1);
    border: var(--glass-border);
    border-radius: 12px;
    padding: 30px;
    width: 90%;
    max-width: 450px;
    text-align: center;
    box-shadow: 0 15px 40px rgba(0,0,0,0.8);
}

.modal-box h3 { color: var(--accent); font-size: 1.5rem; margin-bottom: 10px; }
.modal-box p { color: var(--text-secondary); margin-bottom: 25px; line-height: 1.5; }

.share-link-box {
    display: flex;
    gap: 10px;
    margin-bottom: 25px;
}
.share-link-box input {
    flex: 1;
    background: rgba(0,0,0,0.4);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 6px;
    padding: 12px 15px;
    color: #fff;
    font-family: monospace;
    outline: none;
}
.share-link-box button {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 6px;
    color: #fff;
    width: 45px;
    cursor: pointer;
    transition: background 0.2s;
}
.share-link-box button:hover { background: rgba(255,255,255,0.15); }

.modal-close-btn {
    background: var(--accent);
    color: #000;
    border: none;
    border-radius: 6px;
    padding: 10px 30px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}
.modal-close-btn:hover { background: #00e6b8; }

/* Toolbars */
.toolbar {
    position: fixed;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    border: var(--glass-border);
    display: flex;
    align-items: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
    z-index: 100;
    user-select: none;
}

/* Vertical Dock (Tools) */
.vertical-dock {
    top: 50%;
    left: 40px;
    transform: translateY(-50%);
    flex-direction: column;
    padding: 20px 12px;
    border-radius: 40px;
    gap: 15px;
}

/* Horizontal Dock (Settings) */
.horizontal-dock {
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 100px;
    padding: 12px 24px;
    gap: 15px;
}

/* Zoom Dock */
.zoom-dock {
    bottom: 30px;
    right: 30px;
    left: auto;
    transform: none;
    border-radius: 100px;
    gap: 10px;
    padding: 8px 18px;
}

#zoomLabel {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
    min-width: 50px;
    text-align: center;
    cursor: pointer;
    user-select: none;
}
#zoomLabel:hover {
    color: var(--accent);
}

.tool-group {
    display: flex;
    align-items: center;
    gap: 12px;
}

.separator-h { width: 30px; height: 1px; background: rgba(255,255,255,0.1); }
.separator-v { width: 1px; height: 30px; background: rgba(255,255,255,0.1); }

/* Color Picker */
input[type="color"] {
    -webkit-appearance: none;
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    background: transparent;
}
input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
input[type="color"]::-webkit-color-swatch {
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    transition: transform 0.2s;
}
input[type="color"]:hover::-webkit-color-swatch { transform: scale(1.1); }

/* Range Slider */
input[type="range"] {
    -webkit-appearance: none;
    width: 120px;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    outline: none;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    box-shadow: 0 0 10px rgba(0,255,204,0.5);
    transition: transform 0.1s;
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.2); }

#sizeValue {
    font-size: 0.85rem;
    color: var(--text-primary);
    min-width: 40px;
    font-variant-numeric: tabular-nums;
}

.style-group i { color: var(--text-secondary); font-size: 1rem; }

/* Buttons */
.tool-btn {
    background: transparent;
    border: var(--glass-border);
    color: var(--text-secondary);
    width: 46px;
    height: 46px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    outline: none;
}

.tool-btn i { color: inherit; font-size: inherit; pointer-events: none; }
.tool-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    transform: scale(1.1);
}
.tool-btn.active {
    background: rgba(0, 255, 204, 0.15);
    color: var(--accent);
    border-color: rgba(0, 255, 204, 0.3);
    box-shadow: 0 0 15px rgba(0, 255, 204, 0.2);
}
.tool-btn.danger:hover {
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
    border-color: rgba(239, 68, 68, 0.4);
    box-shadow: 0 0 15px rgba(239, 68, 68, 0.3);
}
.tool-btn.success:hover {
    background: rgba(16, 185, 129, 0.2);
    color: #10b981;
    border-color: rgba(16, 185, 129, 0.4);
    box-shadow: 0 0 15px rgba(16, 185, 129, 0.3);
}