/* ===========================
   Pixel Art Editor — Styles
   Dark mode, Electric Green
   =========================== */

/* --- Reset & Globals --- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary: #00B894;
    --primary-light: #55EFC4;
    --primary-dark: #00986f;
    --bg-900: #0a0e12;
    --bg-800: #0f1318;
    --bg-700: #151b22;
    --bg-600: #1c242e;
    --bg-500: #252f3c;
    --text-100: #f0f4f8;
    --text-200: #c8d1da;
    --text-300: #8a95a5;
    --border: rgba(255, 255, 255, 0.08);
    --glass: rgba(15, 19, 24, 0.85);
    --glass-border: rgba(0, 184, 148, 0.15);
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    --radius: 10px;
    --radius-sm: 6px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --mono: 'JetBrains Mono', monospace;
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

html,
body {
    height: 100%;
    overflow: hidden;
    background: var(--bg-900);
    color: var(--text-100);
    font-family: var(--font);
    font-size: 13px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--bg-500);
    border-radius: 3px;
}

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

/* --- Toolbar / Header --- */
.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 8px 16px;
    background: var(--bg-800);
    border-bottom: 1px solid var(--border);
    z-index: 100;
    flex-shrink: 0;
}

.toolbar-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo {
    font-size: 20px;
    line-height: 1;
}

.app-title {
    font-size: 16px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    white-space: nowrap;
}

.toolbar-center {
    display: flex;
    align-items: center;
    gap: 16px;
}

.toolbar-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* --- Tool Buttons --- */
.tool-group {
    display: flex;
    gap: 4px;
    background: var(--bg-700);
    padding: 4px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.tool-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-200);
    font-size: 16px;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.tool-btn:hover {
    background: var(--bg-600);
    color: var(--text-100);
    transform: translateY(-1px);
}

.tool-btn.active {
    background: var(--primary);
    color: var(--bg-900);
    box-shadow: 0 0 12px rgba(0, 184, 148, 0.4);
}

.tool-btn:focus-visible {
    outline: 2px solid var(--primary-light);
    outline-offset: 2px;
}

/* --- Size Selector --- */
.size-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.size-label {
    color: var(--text-300);
    font-size: 12px;
    font-weight: 500;
}

.size-select {
    background: var(--bg-700);
    color: var(--text-100);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 6px 10px;
    font-family: var(--mono);
    font-size: 12px;
    cursor: pointer;
    transition: var(--transition);
}

.size-select:hover {
    border-color: var(--primary);
}

.size-select:focus {
    outline: none;
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(0, 184, 148, 0.15);
}

/* --- Small Buttons --- */
.btn-sm {
    padding: 6px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-700);
    color: var(--text-200);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-sm:hover {
    background: var(--bg-600);
    border-color: var(--primary);
    color: var(--text-100);
}

/* --- Export Button --- */
.btn-export {
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius);
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--bg-900);
    font-weight: 600;
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 2px 12px rgba(0, 184, 148, 0.25);
}

.btn-export:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(0, 184, 148, 0.4);
}

.btn-export:active {
    transform: translateY(0);
}

/* --- Main Layout --- */
.main-layout {
    display: flex;
    height: calc(100vh - 53px);
    overflow: hidden;
}

/* --- Sidebar --- */
.sidebar {
    width: 220px;
    min-width: 220px;
    background: var(--bg-800);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 0;
    overflow-y: auto;
}

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

/* --- Panel --- */
.panel {
    padding: 14px;
    border-bottom: 1px solid var(--border);
}

.panel-title {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-300);
    margin-bottom: 10px;
}

/* --- Color Picker --- */
.current-color-display {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.color-preview {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    border: 2px solid var(--border);
    background: #00B894;
    box-shadow: 0 0 10px rgba(0, 184, 148, 0.2);
    transition: var(--transition);
}

.color-picker-input {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    background: transparent;
    padding: 0;
}

.color-picker-input::-webkit-color-swatch-wrapper {
    padding: 2px;
}

.color-picker-input::-webkit-color-swatch {
    border: 1px solid var(--border);
    border-radius: 4px;
}

/* --- Palette Grid --- */
.palette-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 3px;
}

.palette-swatch {
    width: 100%;
    aspect-ratio: 1;
    border: 2px solid transparent;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.palette-swatch:hover {
    transform: scale(1.15);
    z-index: 2;
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.5);
}

.palette-swatch.selected {
    border-color: var(--text-100);
    box-shadow: 0 0 0 2px var(--primary);
}

/* --- Layer List --- */
.layer-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
    max-height: 200px;
    overflow-y: auto;
}

.layer-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 8px;
    border-radius: var(--radius-sm);
    background: var(--bg-700);
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    font-size: 12px;
}

.layer-item:hover {
    background: var(--bg-600);
}

.layer-item.active {
    border-color: var(--primary);
    background: rgba(0, 184, 148, 0.08);
}

.layer-item .layer-visibility {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 12px;
    opacity: 0.7;
}

.layer-item .layer-visibility:hover {
    opacity: 1;
}

.layer-item .layer-visibility.hidden {
    opacity: 0.3;
}

.layer-name {
    flex: 1;
    color: var(--text-200);
    font-size: 12px;
}

.layer-delete {
    background: none;
    border: none;
    color: var(--text-300);
    cursor: pointer;
    font-size: 12px;
    padding: 2px;
    opacity: 0;
    transition: var(--transition);
}

.layer-item:hover .layer-delete {
    opacity: 0.7;
}

.layer-delete:hover {
    color: #ff6b6b !important;
    opacity: 1;
}

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

/* --- Canvas Area --- */
.canvas-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background:
        radial-gradient(ellipse at 50% 30%, rgba(0, 184, 148, 0.03), transparent 60%),
        var(--bg-900);
    position: relative;
    overflow: hidden;
}

.canvas-wrapper {
    position: relative;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow:
        0 0 40px rgba(0, 0, 0, 0.5),
        0 0 80px rgba(0, 184, 148, 0.05);
    background:
        repeating-conic-gradient(#1a1a2e 0% 25%, #12121e 0% 50%) 50% / 16px 16px;
    cursor: crosshair;
}

canvas {
    display: block;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

#canvas {
    position: relative;
    z-index: 1;
}

.grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 2;
    pointer-events: none;
}

/* --- Zoom Controls --- */
.zoom-controls {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 12px;
    padding: 6px 14px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    backdrop-filter: blur(12px);
}

.zoom-label {
    font-family: var(--mono);
    font-size: 12px;
    color: var(--primary-light);
    min-width: 45px;
    text-align: center;
}

.grid-toggle {
    display: flex;
    align-items: center;
    gap: 5px;
    color: var(--text-300);
    font-size: 12px;
    cursor: pointer;
    margin-left: 8px;
}

.grid-toggle input[type="checkbox"] {
    accent-color: var(--primary);
    cursor: pointer;
}

/* --- Frame List --- */
.frame-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
    max-height: 300px;
    overflow-y: auto;
}

.frame-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px;
    border-radius: var(--radius-sm);
    background: var(--bg-700);
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
}

.frame-item:hover {
    background: var(--bg-600);
}

.frame-item.active {
    border-color: var(--primary);
    background: rgba(0, 184, 148, 0.08);
}

.frame-thumbnail {
    width: 48px;
    height: 48px;
    border-radius: 4px;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
    background:
        repeating-conic-gradient(#252535 0% 25%, #1c1c2e 0% 50%) 50% / 8px 8px;
    border: 1px solid var(--border);
}

.frame-label {
    flex: 1;
    font-size: 12px;
    color: var(--text-200);
}

.frame-delete {
    background: none;
    border: none;
    color: var(--text-300);
    cursor: pointer;
    font-size: 14px;
    padding: 2px 4px;
    opacity: 0;
    transition: var(--transition);
}

.frame-item:hover .frame-delete {
    opacity: 0.7;
}

.frame-delete:hover {
    color: #ff6b6b !important;
    opacity: 1 !important;
}

.onion-skin-toggle {
    margin-bottom: 10px;
}

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

/* --- Toast --- */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: 10px 24px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    backdrop-filter: blur(16px);
    color: var(--primary-light);
    font-size: 13px;
    font-weight: 500;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.4s;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* --- Animations --- */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

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

.panel {
    animation: fadeIn 0.4s ease-out;
}

/* --- Responsive --- */
@media (max-width: 900px) {
    .main-layout {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        min-width: 100%;
        flex-direction: row;
        border-right: none;
        border-bottom: 1px solid var(--border);
        overflow-x: auto;
        overflow-y: hidden;
    }

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

    .panel {
        min-width: 200px;
    }

    .canvas-area {
        flex: 1;
        min-height: 300px;
    }

    .toolbar {
        flex-wrap: wrap;
        gap: 6px;
        padding: 6px 10px;
    }

    .toolbar-center {
        order: 3;
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 600px) {
    .toolbar-left .app-title {
        display: none;
    }

    .sidebar {
        min-width: auto;
    }

    .panel {
        padding: 10px;
        min-width: 160px;
    }
}