:root {
    --bg-dark: #0f1115;
    --bg-panel: #16181d;
    --bg-panel-hover: #1e2128;
    --bg: #0f1115;
    --surface: rgba(255, 255, 255, 0.02);
    --primary: #00e5ff;
    --primary-hover: #00b3cc;
    --text-main: #e2e8f0;
    --text-muted: #94a3b8;
    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);
    --danger: #ef4444;
    --success: #10b981;
    --radius-lg: 16px;
    --radius-md: 8px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-glow: 0 0 20px rgba(0, 229, 255, 0.15);
}

body.theme-light {
    --bg-dark: #eef2f7;
    --bg-panel: #ffffff;
    --bg-panel-hover: #f7fafc;
    --bg: #eef2f7;
    --surface: #f8fafc;
    --primary: #0ea5e9;
    --primary-hover: #0284c7;
    --text-main: #0f172a;
    --text-muted: #475569;
    --border: rgba(2, 6, 23, 0.14);
    --border-hover: rgba(2, 6, 23, 0.24);
    --shadow: 0 4px 14px rgba(15, 23, 42, 0.08);
    --shadow-glow: 0 0 0 rgba(0, 0, 0, 0);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.app-container {
    max-width: 1320px;
    margin: 0 auto;
    padding: 1.5rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.theme-switch {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.theme-switch label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.theme-switch select {
    background: var(--bg-dark);
    color: var(--text-main);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.35rem 0.55rem;
    font-size: 0.85rem;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: rgba(0, 229, 255, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    box-shadow: var(--shadow-glow);
}

.app-title {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.app-subtitle {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Layout */
.main-content {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) 380px;
    gap: 1.5rem;
    flex: 1;
    align-items: start;
}

@media (max-width: 1024px) {
    .app-header {
        flex-wrap: wrap;
        gap: 0.8rem;
    }

    .main-content {
        grid-template-columns: 1fr;
    }

    .svg-preview-container {
        flex-basis: clamp(360px, 50vh, 520px);
        min-height: clamp(360px, 50vh, 520px);
        max-height: clamp(360px, 50vh, 520px);
    }
}

.pane {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    box-shadow: var(--shadow);
}

.section-header h2 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-main);
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.panel-header-inline {
    align-items: center;
}

.panel-header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-left: auto;
}

.panel-inline-check {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    cursor: pointer;
    font-weight: 400;
    color: var(--text-main);
}

.panel-toggle-btn {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text-main);
    font-size: 1.1rem;
    line-height: 1;
    cursor: pointer;
    transition: all 0.2s ease;
}

.panel-toggle-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(0, 229, 255, 0.08);
}

.panel-content[hidden] {
    display: none !important;
}

.settings-subpanel {
    margin-top: 0.25rem;
    padding: 1rem;
    gap: 1rem;
}

.subpanel-title {
    font-size: 1rem !important;
    margin: 0;
}

/* Uploader */
.upload-area {
    border: 2px dashed var(--border);
    border-radius: var(--radius-md);
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
    background: rgba(255, 255, 255, 0.02);
}

.upload-area:hover,
.upload-area.drag-over {
    border-color: var(--primary);
    background: rgba(0, 229, 255, 0.05);
}

.upload-icon {
    color: var(--text-muted);
    margin-bottom: 1rem;
    transition: color 0.2s;
}

.upload-area:hover .upload-icon,
.upload-area.drag-over .upload-icon {
    color: var(--primary);
}

.upload-area h3 {
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.upload-area p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Preview */
.svg-preview-container {
    flex: 0 0 clamp(420px, 56vh, 620px);
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    min-height: clamp(420px, 56vh, 620px);
    max-height: clamp(420px, 56vh, 620px);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    padding: 1rem;
}

/* When upload area is hidden, let the preview fill the pane */
#preview3D {
    width: 100%;
    height: 100%;
    min-height: 0;
    position: relative;
}

#previewSvg {
    width: 100%;
    height: 100%;
    min-height: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

#previewSvg svg {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    display: block;
}

#previewSvg svg * {
    stroke: var(--primary);
    stroke-width: 1.5px;
    vector-effect: non-scaling-stroke;
    fill: transparent !important;
    pointer-events: visibleStroke;
    transition: stroke 0.2s, stroke-width 0.2s;
    cursor: pointer;
}

#previewSvg svg *.path-none {
    stroke: #9ca3af !important;
    /* Tailwind gray-400 */
    opacity: 0.7 !important;
}

#previewSvg svg *.path-on-path {
    stroke: var(--primary) !important;
}

#previewSvg svg *.path-outside {
    stroke: #3b82f6 !important;
    /* Blue */
}

#previewSvg svg *.path-inside {
    stroke: #ef4444 !important;
    /* Red */
}

#previewSvg svg *.path-drill {
    stroke: #f59e0b !important;
    /* Orange */
    stroke-dasharray: 2, 2;
}

#previewSvg svg *:hover {
    stroke-width: 2.5px !important;
    opacity: 0.8;
}

.selection-box {
    position: absolute;
    border: 1px dashed rgba(0, 229, 255, 0.95);
    background: rgba(0, 229, 255, 0.14);
    box-shadow: inset 0 0 0 1px rgba(142, 247, 255, 0.25);
    pointer-events: none;
    z-index: 5;
}

/* Tabs */
.tab-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 6px 14px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.8125rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.tab-btn:hover {
    color: var(--text-main);
    border-color: var(--border-hover);
}

.tab-btn.active {
    background: rgba(0, 229, 255, 0.15);
    color: var(--primary);
    border-color: var(--primary);
}

/* 3D Viewer Controls */
.viewer-controls {
    position: absolute;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(22, 24, 29, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: 30px;
    padding: 0.5rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 0 15px rgba(0, 229, 255, 0.1);
    z-index: 10;
}

.ctrl-btn {
    background: transparent;
    border: none;
    color: var(--text-main);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.2s;
}

.ctrl-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--primary);
}

.progress-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 200px;
}

.progress-container span {
    font-size: 0.75rem;
    font-variant-numeric: tabular-nums;
    color: var(--text-muted);
    min-width: 40px;
}

#progressSlider {
    flex: 1;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--border);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

#progressSlider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    box-shadow: 0 0 10px var(--primary);
    transition: transform 0.1s;
}

#progressSlider::-webkit-slider-thumb:hover {
    transform: scale(1.3);
}

.speed-control {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding-left: 0.5rem;
    border-left: 1px solid var(--border);
}

.speed-control select {
    background: transparent;
    color: var(--text-main);
    border: none;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    outline: none;
}

.speed-control select option {
    background: var(--bg-panel);
}

/* Settings Grid */
.settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.settings-kv {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.settings-kv .kv-row {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 0.75rem;
    border-bottom: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.01);
}

.settings-kv .kv-row:last-child {
    border-bottom: 0;
}

.settings-kv .kv-label {
    font-size: 0.8125rem;
    color: var(--text-muted);
    font-weight: 500;
    line-height: 1.35;
}

.settings-kv .kv-field {
    width: 100%;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 0.5rem 0.625rem;
    border-radius: 6px;
    font-family: inherit;
    font-size: 0.875rem;
    transition: all 0.2s ease;
}

.settings-kv .kv-field:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(0, 229, 255, 0.1);
}

.input-group.fw {
    grid-column: 1 / -1;
}

.input-group label {
    display: block;
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.input-group input,
.input-group select {
    width: 100%;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 0.625rem 0.75rem;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.875rem;
    transition: all 0.2s ease;
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(0, 229, 255, 0.1);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    width: 100%;
}

.btn-primary {
    background: var(--primary);
    color: #000;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--border);
    color: var(--text-muted);
    box-shadow: none;
}

/* Console Log */
.console-log {
    background: #000;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    overflow: hidden;
    margin-top: auto;
}

body.theme-light .console-log {
    background: #f8fafc;
}

.log-header {
    background: rgba(255, 255, 255, 0.05);
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    border-bottom: 1px solid var(--border);
}

#logText {
    padding: 1rem;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.8125rem;
    color: #a7f3d0;
    margin: 0;
    white-space: pre-wrap;
    max-height: 150px;
    overflow-y: auto;
}

body.theme-light #logText {
    color: #0f766e;
}

/* Toolpath Order List */
.toolpath-list-container {
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border-hover) transparent;
}

.toolpath-list-container::-webkit-scrollbar {
    width: 10px;
}

.toolpath-list-container::-webkit-scrollbar-track {
    background: transparent;
}

.toolpath-list-container::-webkit-scrollbar-thumb {
    background: var(--border-hover);
    border-radius: 8px;
    border: 2px solid transparent;
    background-clip: content-box;
}

.toolpath-list-container::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
    background-clip: content-box;
}

.toolpath-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 10px;
    margin-bottom: 5px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    cursor: grab;
    font-size: 0.85rem;
    color: var(--text-main);
    transition: all 0.2s;
}

.toolpath-item:last-child {
    margin-bottom: 0;
}

.toolpath-item:hover {
    border-color: var(--primary);
    background: rgba(45, 212, 191, 0.05);
    /* very faint primary */
}

.toolpath-item:active {
    cursor: grabbing;
}

.toolpath-item.dragging {
    opacity: 0.5;
    background: var(--bg);
    border: 1px dashed var(--primary);
}

.toolpath-item .mode-badge {
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 0.75rem;
    font-weight: 600;
}

.toolpath-item .mode-badge.on-path {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-main);
}

.toolpath-item .mode-badge.outside {
    background: rgba(59, 130, 246, 0.2);
    color: #3b82f6;
}

.toolpath-item .mode-badge.inside {
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
}

.toolpath-item .mode-badge.drill {
    background: rgba(245, 158, 11, 0.2);
    color: #f59e0b;
}

.toolpath-list-container {
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 5px;
    background: var(--surface);
}

@media (max-width: 1024px) {
    .settings-kv .kv-row {
        grid-template-columns: 1fr;
        gap: 0.45rem;
    }
}