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

:root {
    --primary: #3B82F6;
    --accent: #F59E0B;
    --secondary: #64748B;
    --bg: #0F172A;
    --surface: #111827;
    --surface2: #1E2A3A;
    --border: #1E3A5F;
    --text: #E2E8F0;
    --text-dim: #60A5FA;
    --font: 'Inter', system-ui, sans-serif;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column
}

header {
    padding: .45rem .85rem;
    border-bottom: 1px solid var(--border);
    background: var(--surface);
    display: flex;
    align-items: center;
    gap: .4rem;
    flex-wrap: wrap;
    flex-shrink: 0
}

.logo {
    display: flex;
    align-items: center;
    gap: .35rem;
    margin-right: .3rem
}

.logo-icon {
    width: 26px;
    height: 26px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .75rem
}

.logo h1 {
    font-size: .82rem;
    font-weight: 700;
    color: var(--text-dim)
}

.btn {
    padding: .24rem .5rem;
    border-radius: 5px;
    border: 1px solid var(--border);
    font-family: var(--font);
    font-size: .67rem;
    font-weight: 600;
    cursor: pointer;
    background: var(--surface2);
    color: var(--text);
    transition: all .13s
}

.btn:hover {
    border-color: var(--primary)
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary)
}

.btn-primary:hover {
    background: #60A5FA;
    color: #000
}

/* Mode buttons */
.toolbar-pills {
    display: flex;
    gap: .15rem;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 7px;
    padding: .12rem
}

.mode-btn {
    border: none;
    background: none;
    color: var(--text-dim);
    font-family: var(--font);
    font-size: .65rem;
    font-weight: 600;
    padding: .2rem .45rem;
    border-radius: 5px;
    cursor: pointer;
    transition: all .13s
}

.mode-btn.active,
.mode-btn:hover {
    background: var(--primary);
    color: #fff
}

/* Layout */
.app-body {
    flex: 1;
    display: grid;
    grid-template-columns: 200px 1fr 200px;
    overflow: hidden
}

/* Palette */
.palette {
    overflow-y: auto;
    border-right: 1px solid var(--border);
    background: var(--surface);
    padding: .4rem
}

.palette-group {
    margin-bottom: .5rem
}

.pal-heading {
    font-size: .62rem;
    font-weight: 700;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: .05em;
    margin-bottom: .3rem;
    padding: .1rem .2rem
}

.pal-items {
    display: flex;
    flex-direction: column;
    gap: .15rem
}

.pal-item {
    display: flex;
    align-items: center;
    gap: .35rem;
    padding: .3rem .4rem;
    border-radius: 6px;
    cursor: grab;
    transition: all .13s;
    border: 1px solid transparent;
    font-size: .72rem;
    user-select: none
}

.pal-item:hover {
    background: rgba(59, 130, 246, .1);
    border-color: rgba(59, 130, 246, .2)
}

.pal-item:active {
    cursor: grabbing
}

.pal-icon {
    font-size: 1.1rem;
    width: 22px;
    text-align: center
}

.pal-label {
    font-size: .7rem;
    color: var(--text-dim)
}

/* Canvas */
.canvas-wrap {
    position: relative;
    overflow: hidden;
    background: #070D16;
    cursor: crosshair
}

canvas#main-canvas {
    display: block;
    width: 100%;
    height: 100%
}

.canvas-hint {
    position: absolute;
    bottom: .4rem;
    right: .5rem;
    font-size: .58rem;
    color: rgba(255, 255, 255, .18);
    pointer-events: none
}

/* Properties panel */
.props-panel {
    overflow-y: auto;
    border-left: 1px solid var(--border);
    background: var(--surface);
    padding: .55rem
}

.props-empty {
    font-size: .72rem;
    color: #334;
    text-align: center;
    padding: 1.5rem .5rem
}

.props-title {
    font-size: .68rem;
    font-weight: 700;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: .05em;
    margin-bottom: .5rem
}

.form-group {
    margin-bottom: .4rem
}

.form-label {
    font-size: .6rem;
    font-weight: 600;
    color: var(--text-dim);
    display: block;
    margin-bottom: .1rem;
    text-transform: uppercase;
    letter-spacing: .04em
}

.form-input,
.form-select {
    width: 100%;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 5px;
    color: var(--text);
    font-family: var(--font);
    font-size: .76rem;
    padding: .24rem .4rem;
    outline: none
}

.form-input:focus,
.form-select:focus {
    border-color: var(--primary)
}

.color-row {
    display: flex;
    gap: .25rem;
    align-items: center
}

.color-swatch {
    width: 30px;
    height: 24px;
    border-radius: 4px;
    cursor: pointer;
    overflow: hidden;
    border: 1px solid var(--border)
}

.color-swatch input {
    width: 44px;
    height: 44px;
    border: none;
    transform: translate(-7px, -7px);
    cursor: pointer
}

::-webkit-scrollbar {
    width: 4px
}

::-webkit-scrollbar-track {
    background: var(--surface)
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px
}