/* Reset and base styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f3460;
    --accent: #e94560;
    --accent-hover: #ff6b6b;
    --text-primary: #eaeaea;
    --text-secondary: #a0a0a0;
    --success: #4ecca3;
    --error: #ff6b6b;
    --warning: #feca57;
    --border: #2a2a4a;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

header h1 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Main layout */
main {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 2rem;
}

@media (max-width: 900px) {
    main {
        grid-template-columns: 1fr;
    }
}

/* Controls section */
.controls {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border);
}

.part-selector {
    margin-bottom: 1.5rem;
}

.part-selector label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.part-selector select {
    width: 100%;
    padding: 0.75rem 2.5rem 0.75rem 0.75rem;
    border-radius: 8px;
    border: 2px solid var(--border);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 12 12'%3E%3Cpath fill='%23a0a0a0' d='M2 4l4 4 4-4'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 14px;
}

.part-selector select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.15);
}

.part-selector select:hover {
    border-color: var(--accent);
}

.part-selector select option {
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: 0.5rem;
}

/* Export options */
.export-options {
    margin-bottom: 1rem;
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border-radius: 8px;
    border: 1px solid var(--border);
}

.export-options label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.export-options select {
    width: 100%;
    padding: 0.5rem 2rem 0.5rem 0.5rem;
    border-radius: 6px;
    border: 2px solid var(--border);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23a0a0a0' d='M2 4l4 4 4-4'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.5rem center;
    background-size: 12px;
}

.export-options select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.15);
}

.export-options select:hover {
    border-color: var(--accent);
}

.export-options select option {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* G-code options panel */
.gcode-options {
    margin-bottom: 1rem;
    padding: 1rem;
    background: var(--bg-tertiary);
    border-radius: 8px;
    border: 1px solid var(--accent);
}

.gcode-options-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.gcode-field {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.gcode-field label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.gcode-field input {
    padding: 0.4rem 0.5rem;
    border-radius: 4px;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.8rem;
    transition: border-color 0.2s;
}

.gcode-field select {
    padding: 0.4rem 1.75rem 0.4rem 0.5rem;
    border-radius: 4px;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.8rem;
    cursor: pointer;
    transition: border-color 0.2s;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 12 12'%3E%3Cpath fill='%23a0a0a0' d='M2 4l4 4 4-4'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.4rem center;
    background-size: 10px;
}

.gcode-field select:focus,
.gcode-field input:focus {
    outline: none;
    border-color: var(--accent);
}

.gcode-field select:hover {
    border-color: var(--accent);
}

.gcode-field select option {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.gcode-field input[type="number"] {
    -moz-appearance: textfield;
}

.gcode-field input[type="number"]::-webkit-outer-spin-button,
.gcode-field input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.gcode-field-toggle {
    justify-content: center;
}

.gcode-toggle-row {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    min-height: 34px;
    padding: 0.45rem 0.55rem;
    border-radius: 4px;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
}

.gcode-toggle-row input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    margin: 0;
    accent-color: var(--accent);
    flex: 0 0 auto;
}

.gcode-toggle-text {
    font-size: 0.74rem;
    color: var(--text-secondary);
    line-height: 1.3;
}

.gcode-tool-config {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(233, 69, 96, 0.2);
}

.gcode-tool-config-header {
    margin-bottom: 0.75rem;
}

.gcode-tool-config-header h3 {
    margin: 0;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.gcode-tool-config-header p {
    margin: 0.25rem 0 0;
    font-size: 0.76rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.gcode-tool-config-status {
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.gcode-tool-config-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.gcode-tool-row {
    padding: 0.8rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: rgba(15, 22, 42, 0.55);
}

.gcode-tool-row-summary {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem 0.75rem;
    margin-bottom: 0.65rem;
}

.gcode-tool-row-title {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    min-width: 0;
}

.gcode-tool-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 2.5rem;
    padding: 0.15rem 0.45rem;
    border-radius: 999px;
    background: rgba(233, 69, 96, 0.18);
    color: var(--accent);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.03em;
}

.gcode-tool-row-name {
    font-size: 0.84rem;
    font-weight: 600;
    color: var(--text-primary);
}

.gcode-tool-row-meta {
    font-size: 0.74rem;
    color: var(--text-secondary);
    text-align: right;
}

.gcode-tool-row-controls {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
}

.gcode-tool-row-control {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.gcode-tool-row-control label {
    font-size: 0.73rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.gcode-tool-row-control input,
.gcode-tool-row-control select {
    width: 100%;
    padding: 0.42rem 0.5rem;
    border-radius: 4px;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.8rem;
}

.gcode-tool-row-control select {
    padding-right: 1.75rem;
}

.gcode-tool-row-control input:focus,
.gcode-tool-row-control select:focus {
    outline: none;
    border-color: var(--accent);
}

.gcode-tool-row-note {
    margin-top: 0.55rem;
    font-size: 0.72rem;
    color: var(--text-secondary);
}

/* Form styles */
#param-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.form-group label {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    font-size: 0.9rem;
}

.form-group label .unit {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.form-group input {
    padding: 0.6rem 0.75rem;
    border-radius: 6px;
    border: 2px solid var(--border);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent);
}

/* Select dropdowns in form groups */
.form-group select {
    padding: 0.6rem 2.5rem 0.6rem 0.75rem;
    border-radius: 6px;
    border: 2px solid var(--border);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23a0a0a0' d='M2 4l4 4 4-4'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 12px;
}

.form-group select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.15);
}

.form-group select:hover {
    border-color: var(--accent);
}

.form-group select.valid {
    border-color: var(--success);
}

.form-group select.invalid {
    border-color: var(--error);
    background-color: rgba(255, 107, 107, 0.1);
}

.form-group select option {
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: 0.5rem;
}

.form-group input.invalid {
    border-color: var(--error);
    background: rgba(255, 107, 107, 0.1);
}

.form-group input.valid {
    border-color: var(--success);
}

.form-group .error-msg {
    color: var(--error);
    font-size: 0.75rem;
    min-height: 1rem;
}

/* Validation summary */
.validation-summary {
    margin: 1rem 0;
    padding: 0.75rem;
    border-radius: 8px;
    font-size: 0.85rem;
    min-height: 2.5rem;
}

.validation-summary.valid {
    background: rgba(78, 204, 163, 0.15);
    color: var(--success);
    border: 1px solid var(--success);
}

.validation-summary.invalid {
    background: rgba(255, 107, 107, 0.15);
    color: var(--error);
    border: 1px solid var(--error);
}

/* Button group */
.button-group {
    display: flex;
    gap: 0.75rem;
}

/* Download button */
.download-btn {
    flex: 1;
    padding: 1rem;
    border: none;
    border-radius: 8px;
    background: var(--accent);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
}

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

.download-btn:disabled {
    background: var(--border);
    color: var(--text-secondary);
    cursor: not-allowed;
}

/* Import button */
.import-btn {
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
}

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

/* Preview section */
.preview-stack {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-self: start;
}

.preview {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border);
}

@media (min-width: 901px) {
    .preview-stack {
        position: sticky;
        top: 1rem;
    }
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.preview h2 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.preview-header h2 {
    margin-bottom: 0;
}

/* 3D viewer container */
.viewer-container {
    background: #0d1117;
    border-radius: 8px;
    min-height: 400px;
    width: 100%;
    position: relative;
}

.viewer-container canvas {
    border-radius: 8px;
}

/* 3D Viewer container */
.viewer-container {
    position: relative;
}

.toolpath-preview[hidden] {
    display: none !important;
}

.toolpath-viewer-container {
    min-height: 320px;
}

.toolpath-playback {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.toolpath-play-btn {
    padding: 0.45rem 0.9rem;
    border: 1px solid rgba(125, 211, 252, 0.35);
    border-radius: 999px;
    background: rgba(14, 165, 233, 0.15);
    color: #c7f0ff;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s, transform 0.1s;
}

.toolpath-play-btn:hover:not(:disabled) {
    background: rgba(14, 165, 233, 0.25);
    border-color: rgba(125, 211, 252, 0.6);
}

.toolpath-play-btn:disabled {
    cursor: not-allowed;
    opacity: 0.45;
}

.toolpath-playback input[type="range"] {
    width: 180px;
    accent-color: #22d3ee;
}

.toolpath-status,
.toolpath-meta,
.toolpath-legend {
    font-size: 0.8rem;
    border-radius: 8px;
}

.toolpath-status {
    margin-top: 0.9rem;
    padding: 0.7rem 0.85rem;
    background: rgba(15, 52, 96, 0.45);
    color: #9fb9d6;
    border: 1px solid rgba(42, 42, 74, 0.9);
}

.toolpath-status.is-busy {
    color: #fbbf24;
    border-color: rgba(251, 191, 36, 0.28);
}

.toolpath-status.is-ready {
    color: #7dd3fc;
    border-color: rgba(125, 211, 252, 0.3);
}

.toolpath-status.is-error {
    color: #fda4af;
    border-color: rgba(251, 113, 133, 0.3);
}

.toolpath-meta {
    margin-top: 0.75rem;
    padding: 0.75rem 0.85rem;
    background: rgba(8, 17, 26, 0.7);
    color: #cbd5e1;
    border: 1px solid rgba(34, 211, 238, 0.14);
    font-family: monospace;
}

.toolpath-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-top: 0.75rem;
}

.toolpath-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.35rem 0.65rem;
    border-radius: 999px;
    background: rgba(15, 52, 96, 0.5);
    color: var(--text-secondary);
}

.toolpath-chip::before {
    content: '';
    width: 0.55rem;
    height: 0.55rem;
    border-radius: 999px;
    background: currentColor;
}

.toolpath-chip.rapid {
    color: #f59e0b;
}

.toolpath-chip.cut {
    color: #22d3ee;
}

.toolpath-chip.drill {
    color: #f472b6;
}

@media (max-width: 900px) {
    .preview-header {
        flex-direction: column;
        align-items: stretch;
    }

    .gcode-tool-row-summary {
        flex-direction: column;
        align-items: flex-start;
    }

    .gcode-tool-row-meta {
        text-align: left;
    }

    .gcode-tool-row-controls {
        grid-template-columns: 1fr;
    }

    .toolpath-playback {
        width: 100%;
    }

    .toolpath-playback input[type="range"] {
        width: 100%;
    }
}


/* Dimensions legend */
.dimensions-legend {
    margin-top: 1rem;
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border-radius: 6px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-family: monospace;
}

/* Footer */
footer {
    text-align: center;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.85rem;
}