:root {
    --primary: #2563EB;
    --primary-hover: #1D4ED8;
    --primary-glow: rgba(37, 99, 235, .25);
    --secondary: #60A5FA;
    --accent: #10B981;
    --accent-warn: #F59E0B;
    --accent-red: #EF4444;
    --bg: #0B1120;
    --bg-surface: #111827;
    --bg-elevated: #1F2937;
    --bg-card: rgba(31, 41, 55, .85);
    --text: #E5E7EB;
    --text-secondary: #9CA3AF;
    --text-muted: #4B5563;
    --border: rgba(37, 99, 235, .12);
    --border-strong: rgba(37, 99, 235, .25);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-xs: 6px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Fira Code', 'Cascadia Code', monospace;
    --transition: 250ms cubic-bezier(.4, 0, .2, 1)
}

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

html,
body {
    min-height: 100%;
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    -webkit-font-smoothing: antialiased
}

.hidden {
    display: none !important
}

.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: 56px;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px
}

.header h1 {
    font-size: 1rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text
}

.header-actions {
    display: flex;
    gap: 8px
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    font-family: var(--font);
    font-size: .8rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-xs);
    cursor: pointer;
    transition: all var(--transition)
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: #fff;
    box-shadow: 0 2px 12px var(--primary-glow)
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px var(--primary-glow)
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid transparent
}

.btn-ghost:hover {
    color: var(--text);
    background: var(--bg-elevated)
}

.btn-sm {
    padding: 6px 12px;
    font-size: .72rem
}

.main {
    max-width: 960px;
    margin: 0 auto;
    padding: 24px
}

.section-title {
    font-size: .9rem;
    font-weight: 700;
    margin-bottom: 12px
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px
}

.input-section {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px
}

.textarea {
    width: 100%;
    padding: 12px;
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: .78rem;
    line-height: 1.6;
    resize: vertical;
    outline: none;
    transition: border-color var(--transition);
    tab-size: 2
}

.textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow)
}

.mono {
    font-family: var(--font-mono)
}

.summary-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 20px
}

.summary-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    text-align: center
}

.summary-label {
    display: block;
    font-size: .65rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: .05em;
    margin-bottom: 6px
}

.summary-val {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary)
}

.summary-val.accent {
    color: var(--accent)
}

.summary-val.warn {
    color: var(--accent-warn)
}

.layers-panel,
.recs-panel,
.details-panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px
}

.layers-chart {
    display: flex;
    flex-direction: column;
    gap: 4px
}

.layer-bar-row {
    display: grid;
    grid-template-columns: 160px 1fr 60px;
    gap: 10px;
    align-items: center
}

.layer-bar-label {
    font-family: var(--font-mono);
    font-size: .68rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis
}

.layer-bar-track {
    height: 20px;
    background: var(--bg);
    border-radius: 4px;
    overflow: hidden
}

.layer-bar-fill {
    height: 100%;
    border-radius: 4px;
    transition: width .5s ease;
    min-width: 2px
}

.layer-bar-size {
    font-family: var(--font-mono);
    font-size: .68rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-align: right
}

.recs-list {
    display: flex;
    flex-direction: column;
    gap: 8px
}

.rec-item {
    display: flex;
    gap: 10px;
    padding: 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: .8rem;
    line-height: 1.5
}

.rec-item.warning {
    border-left: 3px solid var(--accent-warn)
}

.rec-item.error {
    border-left: 3px solid var(--accent-red)
}

.rec-item.info {
    border-left: 3px solid var(--primary)
}

.rec-item.success {
    border-left: 3px solid var(--accent)
}

.rec-icon {
    font-size: 1rem;
    flex-shrink: 0
}

.rec-text {
    color: var(--text-secondary)
}

.rec-text strong {
    color: var(--text)
}

.layer-list {
    display: flex;
    flex-direction: column;
    gap: 4px
}

.layer-detail {
    display: grid;
    grid-template-columns: 28px 1fr 70px;
    gap: 8px;
    align-items: center;
    padding: 8px 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-xs);
    font-size: .75rem;
    transition: background var(--transition)
}

.layer-detail:hover {
    background: var(--bg-elevated)
}

.layer-num {
    font-weight: 700;
    color: var(--text-muted);
    text-align: center
}

.layer-cmd {
    font-family: var(--font-mono);
    font-size: .72rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis
}

.layer-size {
    font-family: var(--font-mono);
    font-weight: 700;
    text-align: right;
    color: var(--primary)
}

.layer-size.large {
    color: var(--accent-warn)
}

.layer-size.xlarge {
    color: var(--accent-red)
}

@media(max-width:768px) {
    .summary-row {
        grid-template-columns: repeat(2, 1fr)
    }

    .layer-bar-row {
        grid-template-columns: 100px 1fr 50px
    }

    .main {
        padding: 16px
    }
}

@media(max-width:480px) {
    .summary-row {
        grid-template-columns: 1fr 1fr
    }

    .layer-bar-row {
        grid-template-columns: 1fr
    }

    .layer-bar-label {
        display: none
    }
}