:root {
    --bg-dark: #12141a;
    --bg-panel: #1a1c23;
    --bg-header: #1e2129;
    --bg-input: #2a2d37;
    --border: #313541;
    --accent: #3b82f6;
    --accent-hover: #60a5fa;
    --accent-active: #2563eb;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --text-dim: #64748b;
    --danger: #ef4444;
    --success: #10b981;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    --glass: rgba(26, 28, 35, 0.85);
    --radius: 8px;
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text);
    overflow: hidden;
    height: 100vh;
    width: 100vw;
}

#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* Header & Toolbar */
.app-header {
    height: 64px;
    background-color: var(--bg-header);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 20px;
    gap: 24px;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 220px;
}

.logo-icon {
    font-size: 24px;
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
}

.logo-text {
    font-weight: 700;
    font-size: 18px;
    letter-spacing: 1px;
}

.logo-text span {
    font-weight: 400;
    opacity: 0.7;
}

.main-toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-grow: 1;
}

.tool-group {
    display: flex;
    background-color: var(--bg-dark);
    padding: 4px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.separator {
    width: 1px;
    height: 32px;
    background-color: var(--border);
    margin: 0 12px;
}

.btn-standard {
    background-color: var(--bg-panel);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 500;
    gap: 8px;
    border-radius: var(--radius);
}

.btn-standard:hover {
    background-color: var(--bg-input);
    border-color: var(--accent);
}

.btn-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border-color: rgba(16, 185, 129, 0.3);
}

.btn-success:hover {
    background-color: var(--success);
    color: white;
}

.btn-accent {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--accent);
    border-color: rgba(59, 130, 246, 0.3);
}

.btn-accent:hover {
    background-color: var(--accent);
    color: white;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-left: auto;
}

button {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 8px;
    cursor: pointer;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

button:hover {
    color: var(--text);
    background-color: var(--border);
}

button.active {
    background-color: var(--accent);
    color: white;
}

button svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

.status-bar {
    display: flex;
    gap: 20px;
    font-size: 13px;
    color: var(--text-dim);
    font-variant-numeric: tabular-nums;
    background: var(--bg-dark);
    padding: 4px 12px;
    border-radius: 20px;
    border: 1px solid var(--border);
}

/* Vertical Drawing Tools */
.drawing-tools-v {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    padding: 16px;
}

.drawing-tools-v button {
    width: 100%;
    aspect-ratio: 1;
    background-color: var(--bg-input);
    border: 1px solid var(--border);
}

.drawing-tools-v button:hover {
    border-color: var(--accent);
}

.drawing-tools-v button.active {
    background-color: var(--accent);
    border-color: var(--accent);
}

/* Main Layout */
.editor-container {
    display: flex;
    flex-grow: 1;
    overflow: hidden;
    position: relative;
    background-image: radial-gradient(circle at 1px 1px, #1e2129 1px, transparent 0);
    background-size: 40px 40px;
}

/* Sidebars */
.sidebar-left,
.sidebar-right {
    width: 300px;
    background-color: var(--bg-panel);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    z-index: 50;
}

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

.panel {
    border-bottom: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}

.panel:last-child {
    border-bottom: none;
}

.panel-header {
    padding: 12px 16px;
    background-color: rgba(0, 0, 0, 0.2);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-header h3 {
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.panel-content {
    padding: 16px;
}

/* Layers List */
.layers-list {
    flex-grow: 1;
    overflow-y: auto;
    padding: 8px;
}

.layer-item {
    display: flex;
    align-items: center;
    padding: 8px 12px;
    border-radius: var(--radius);
    gap: 12px;
    margin-bottom: 4px;
    cursor: pointer;
    background-color: transparent;
    transition: var(--transition);
}

.layer-item:hover {
    background-color: var(--bg-input);
}

.layer-item.active {
    background-color: rgba(59, 130, 246, 0.2);
    border-left: 3px solid var(--accent);
}

.layer-visibility {
    cursor: pointer;
    opacity: 0.5;
}

.layer-item.visible .layer-visibility {
    opacity: 1;
    color: var(--accent);
}

.layer-name {
    flex-grow: 1;
    font-size: 14px;
}

/* Viewport */
.viewport {
    flex-grow: 1;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #0b0d11;
}

#konva-stage {
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
    cursor: crosshair;
}

/* Tileset Preview */
.tileset-preview {
    background-color: var(--bg-dark);
    margin: 16px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    max-height: 400px;
    overflow: auto;
    position: relative;
}

#tileset-canvas {
    display: block;
    image-rendering: pixelated;
}

.tileset-selector-container {
    padding: 0 16px;
    margin-top: 16px;
}

select {
    width: 100%;
    background-color: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 8px 12px;
    border-radius: 6px;
    outline: none;
    font-family: inherit;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    transition: opacity 0.3s ease;
}

.modal-overlay.hidden {
    display: none;
    opacity: 0;
}

.modal {
    background-color: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 16px;
    width: 100%;
    max-width: 600px;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    animation: modal-enter 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal.large {
    max-width: 1000px;
}

@keyframes modal-enter {
    from {
        transform: scale(0.9) translateY(20px);
        opacity: 0;
    }

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

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-close {
    font-size: 24px;
    line-height: 1;
    color: var(--text-dim);
    background: none;
    border: none;
    cursor: pointer;
}

.modal-body {
    padding: 24px;
    overflow-y: auto;
    max-height: 70vh;
}

.modal-footer {
    padding: 20px 24px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

.btn-primary {
    background-color: var(--accent);
    color: white;
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 600;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
}

.btn-secondary {
    background-color: var(--border);
    color: var(--text);
    padding: 10px 24px;
    border-radius: 8px;
}

/* Inputs */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--text-muted);
}

input[type="text"],
input[type="number"] {
    width: 100%;
    background-color: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 10px 14px;
    border-radius: 8px;
    outline: none;
    transition: var(--transition);
}

input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.property-group {
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.property-group:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.property-group h4 {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--accent);
    margin-bottom: 16px;
    opacity: 0.9;
}

input[type="range"] {
    width: 100%;
    height: 6px;
    background: var(--bg-input);
    border-radius: 5px;
    outline: none;
    appearance: none;
    margin: 10px 0;
}

input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 16px;
    height: 16px;
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid var(--bg-panel);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 10px rgba(59, 130, 246, 0.5);
}

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

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-dim);
}