/* ==========================================================================
   ElectroCircuit Rapid Lab - 3D Printing & CNC Rapid Prototyping CSS
   Theme: Industrial Cyberpunk / Dark Glassmorphism / Modern High-Tech
   ========================================================================== */

:root {
    --rp-bg-dark: #090d16;
    --rp-bg-panel: #111726;
    --rp-bg-card: #161f33;
    --rp-bg-card-hover: #1e2945;
    --rp-bg-card-active: rgba(0, 242, 254, 0.12);
    --rp-bg-input: #0d1322;
    --rp-bg-glass: rgba(17, 23, 38, 0.85);

    --rp-cyan: #00f2fe;
    --rp-blue: #4facfe;
    --rp-neon: #00e5ff;
    --rp-magenta: #ff007f;
    --rp-gold: #ffb703;
    --rp-green: #00e676;
    --rp-orange: #ff9100;
    --rp-purple: #7928ca;

    --rp-text-main: #f8fafc;
    --rp-text-sub: #cbd5e1;
    --rp-text-muted: #94a3b8;
    --rp-text-dim: #64748b;

    --rp-border: rgba(255, 255, 255, 0.08);
    --rp-border-light: rgba(255, 255, 255, 0.15);
    --rp-border-accent: rgba(0, 242, 254, 0.4);
    --rp-border-active: #00f2fe;

    --rp-shadow-card: 0 10px 30px rgba(0, 0, 0, 0.4);
    --rp-shadow-glow: 0 0 25px rgba(0, 242, 254, 0.2);
    --rp-shadow-neon: 0 0 35px rgba(0, 242, 254, 0.35);

    --rp-radius-sm: 8px;
    --rp-radius-md: 14px;
    --rp-radius-lg: 20px;
    --rp-radius-full: 9999px;

    --rp-transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Mode Variables & Theme Overrides for CNC / Rapid Prototyping */
html[data-theme="light"] {
    --rp-bg-dark: #fff8f8;
    --rp-bg-panel: #ffffff;
    --rp-bg-card: #ffffff;
    --rp-bg-card-hover: #fff0f2;
    --rp-bg-card-active: rgba(2, 132, 199, 0.1);
    --rp-bg-input: #ffffff;
    --rp-bg-glass: rgba(255, 248, 248, 0.94);

    --rp-cyan: #0284c7;
    --rp-blue: #0284c7;
    --rp-neon: #e11d48;
    --rp-magenta: #db2777;
    --rp-gold: #d97706;
    --rp-green: #16a34a;
    --rp-orange: #ea580c;
    --rp-purple: #7c3aed;

    --rp-text-main: #1e1b1b;
    --rp-text-sub: #475569;
    --rp-text-muted: #64748b;
    --rp-text-dim: #94a3b8;

    --rp-border: rgba(254, 205, 211, 0.85);
    --rp-border-light: rgba(254, 205, 211, 0.95);
    --rp-border-accent: rgba(225, 29, 72, 0.4);
    --rp-border-active: #e11d48;

    --rp-shadow-card: 0 10px 30px rgba(225, 29, 72, 0.06);
    --rp-shadow-glow: 0 0 25px rgba(225, 29, 72, 0.12);
    --rp-shadow-neon: 0 0 35px rgba(225, 29, 72, 0.2);
}

html[data-theme="light"] .rp-main-wrapper {
    background: radial-gradient(circle at 20% 15%, rgba(2, 132, 199, 0.05) 0%, transparent 40%),
                radial-gradient(circle at 80% 80%, rgba(225, 29, 72, 0.04) 0%, transparent 40%),
                #fff8f8 !important;
}

html[data-theme="light"] .rp-hero {
    background: linear-gradient(180deg, rgba(255, 240, 242, 0.7) 0%, rgba(255, 248, 248, 0.95) 100%);
    border-bottom-color: var(--rp-border);
}

html[data-theme="light"] .rp-hero-title {
    color: #0f172a !important;
    text-shadow: none !important;
}

html[data-theme="light"] .rp-title-accent-cyan {
    background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%) !important;
    -webkit-background-clip: text !important;
    -webkit-text-fill-color: transparent !important;
    filter: none !important;
}

html[data-theme="light"] .rp-title-accent-gold {
    background: linear-gradient(135deg, #d97706 0%, #b45309 100%) !important;
    -webkit-background-clip: text !important;
    -webkit-text-fill-color: transparent !important;
    filter: none !important;
}

html[data-theme="light"] .rp-hero-desc {
    color: #64748b;
}

html[data-theme="light"] .rp-feature-pill {
    background: #ffffff;
    border-color: var(--rp-border);
    color: #475569;
}

html[data-theme="light"] .rp-section-box,
html[data-theme="light"] .rp-viewer-container,
html[data-theme="light"] .rp-order-summary-card,
html[data-theme="light"] .rp-mat-modal-content,
html[data-theme="light"] .rp-order-modal-content {
    background: #ffffff !important;
    border-color: var(--rp-border) !important;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05) !important;
}

html[data-theme="light"] .rp-tech-tab-btn,
html[data-theme="light"] .rp-mat-card,
html[data-theme="light"] .rp-finish-card,
html[data-theme="light"] .rp-qty-tier-card,
html[data-theme="light"] .rp-analytic-card,
html[data-theme="light"] .rp-custom-qty-row,
html[data-theme="light"] .rp-part-card-item {
    background: #ffffff;
    border-color: var(--rp-border);
}

html[data-theme="light"] .rp-tech-tab-btn.active,
html[data-theme="light"] .rp-mat-card.active,
html[data-theme="light"] .rp-finish-card.active,
html[data-theme="light"] .rp-qty-tier-card.active,
html[data-theme="light"] .rp-part-card-item.active {
    background: rgba(2, 132, 199, 0.07);
    border-color: #0284c7;
}

html[data-theme="light"] .rp-dropzone {
    background: #ffffff;
    border-color: rgba(2, 132, 199, 0.35);
}

html[data-theme="light"] .rp-dropzone:hover {
    background: #f0f9ff;
    border-color: #0284c7;
}

html[data-theme="light"] .rp-dropzone-title {
    color: #1e1b1b;
}

html[data-theme="light"] .rp-input,
html[data-theme="light"] .rp-select {
    background: #ffffff;
    border-color: var(--rp-border);
    color: #1e1b1b;
}

html[data-theme="light"] .rp-viewer-header-tabs {
    background: #ffffff !important;
    border-bottom: 1.5px solid #e2e8f0 !important;
}

html[data-theme="light"] .rp-viewer-tab-group {
    background: #f1f5f9 !important;
    border: 1.5px solid #cbd5e1 !important;
}

html[data-theme="light"] .rp-viewer-tab-btn {
    color: #475569 !important;
    font-weight: 700 !important;
    background: transparent !important;
}

html[data-theme="light"] .rp-viewer-tab-btn:hover {
    color: #0f172a !important;
    background: rgba(0, 0, 0, 0.05) !important;
}

html[data-theme="light"] .rp-viewer-tab-btn.active {
    background: #0284c7 !important;
    color: #ffffff !important;
    font-weight: 800 !important;
    box-shadow: 0 4px 12px rgba(2, 132, 199, 0.3) !important;
}

html[data-theme="light"] .rp-viewer-quick-colors {
    background: #f8fafc !important;
    border: 1.5px solid #cbd5e1 !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04) !important;
}

html[data-theme="light"] .rp-viewer-quick-colors span {
    color: #334155 !important;
    font-weight: 700 !important;
}

html[data-theme="light"] .rp-viewer-badge {
    background: #e0f2fe !important;
    border: 1.5px solid #0284c7 !important;
    color: #0369a1 !important;
    font-weight: 800 !important;
}

html[data-theme="light"] .rp-diff-controls-bar,
html[data-theme="light"] .rp-slice-controls-bar {
    background: #f8fafc !important;
    border-bottom: 1.5px solid #cbd5e1 !important;
}

html[data-theme="light"] .rp-diff-slot.base {
    background: #fff1f2 !important;
    border-color: #e11d48 !important;
    color: #be123c !important;
    font-weight: 800 !important;
}

html[data-theme="light"] .rp-diff-slot.target {
    background: #f0fdf4 !important;
    border-color: #16a34a !important;
    color: #15803d !important;
    font-weight: 800 !important;
}

html[data-theme="light"] .rp-diff-slot select {
    background: #ffffff !important;
    color: #0f172a !important;
    border: 1.5px solid #cbd5e1 !important;
    font-weight: 700 !important;
}

html[data-theme="light"] .rp-axis-btn {
    background: #ffffff !important;
    color: #1e293b !important;
    border: 1.5px solid #cbd5e1 !important;
    font-weight: 700 !important;
}

html[data-theme="light"] .rp-axis-btn:hover {
    background: #f0f9ff !important;
    border-color: #0284c7 !important;
    color: #0284c7 !important;
}

html[data-theme="light"] .rp-axis-btn.active {
    background: #0284c7 !important;
    color: #ffffff !important;
    font-weight: 800 !important;
    border-color: #0284c7 !important;
    box-shadow: 0 4px 10px rgba(2, 132, 199, 0.25) !important;
}

html[data-theme="light"] .rp-diff-target-btn.part-a {
    background: #fff1f2 !important;
    border: 1.5px solid #e11d48 !important;
    color: #be123c !important;
    font-weight: 700 !important;
}

html[data-theme="light"] .rp-diff-target-btn.part-a.active {
    background: #e11d48 !important;
    color: #ffffff !important;
    font-weight: 800 !important;
}

html[data-theme="light"] .rp-diff-target-btn.part-b {
    background: #f0fdf4 !important;
    border: 1.5px solid #16a34a !important;
    color: #15803d !important;
    font-weight: 700 !important;
}

html[data-theme="light"] .rp-diff-target-btn.part-b.active {
    background: #16a34a !important;
    color: #ffffff !important;
    font-weight: 800 !important;
}

html[data-theme="light"] .rp-diff-legend,
html[data-theme="light"] .rp-diff-slider-wrap {
    color: #1e293b !important;
    font-weight: 700 !important;
}

html[data-theme="light"] .rp-viewer-dimensions {
    background: rgba(255, 255, 255, 0.96) !important;
    border: 1.5px solid #0284c7 !important;
    color: #0284c7 !important;
    font-weight: 800 !important;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1) !important;
}

html[data-theme="light"] .rp-viewer-dimensions span {
    color: #0284c7 !important;
    font-weight: 800 !important;
}

html[data-theme="light"] .rp-viewer-help {
    background: rgba(255, 255, 255, 0.96) !important;
    border: 1.5px solid #cbd5e1 !important;
    color: #0f172a !important;
    font-weight: 700 !important;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1) !important;
}

html[data-theme="light"] .rp-viewer-help i {
    color: #0284c7 !important;
}

html[data-theme="light"] .rp-viewer-toolbar {
    background: #ffffff !important;
    border: 1.5px solid #cbd5e1 !important;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12) !important;
}

html[data-theme="light"] .rp-viewer-toolbar span {
    background: #cbd5e1 !important;
}

html[data-theme="light"] .rp-view-tool-btn {
    background: #f1f5f9 !important;
    color: #334155 !important;
    border: 1.5px solid #cbd5e1 !important;
}

html[data-theme="light"] .rp-view-tool-btn i {
    color: #334155 !important;
    filter: none !important;
}

html[data-theme="light"] .rp-view-tool-btn:hover {
    background: #e0f2fe !important;
    border-color: #0284c7 !important;
    color: #0284c7 !important;
    transform: translateY(-2px);
}

html[data-theme="light"] .rp-view-tool-btn:hover i {
    color: #0284c7 !important;
}

html[data-theme="light"] .rp-view-tool-btn.active {
    background: #0284c7 !important;
    border-color: #0369a1 !important;
    color: #ffffff !important;
    box-shadow: 0 4px 12px rgba(2, 132, 199, 0.45) !important;
    transform: scale(1.08);
}

html[data-theme="light"] .rp-view-tool-btn.active i {
    color: #ffffff !important;
    filter: none !important;
}

html[data-theme="light"] .rp-mesh-analytics-bar {
    background: #fff8f8;
    border-top-color: var(--rp-border);
}

html[data-theme="light"] .rp-summary-row {
    border-bottom-color: var(--rp-border);
}

html[data-theme="light"] .rp-summary-val {
    color: #1e1b1b;
}

/* Page Layout */
.rp-main-wrapper {
    min-height: 100vh;
    padding-bottom: 120px;
    position: relative;
    zoom: 0.9;
    background: radial-gradient(circle at 20% 15%, rgba(79, 172, 254, 0.08) 0%, transparent 40%),
                radial-gradient(circle at 80% 80%, rgba(255, 0, 127, 0.05) 0%, transparent 40%),
                var(--rp-bg-dark);
}

/* Page Header / Hero Banner */
.rp-hero {
    padding: 2.5rem 0 2rem;
    border-bottom: 1px solid var(--rp-border);
    background: linear-gradient(180deg, rgba(17, 23, 38, 0.6) 0%, rgba(9, 13, 22, 0.3) 100%);
    position: relative;
    overflow: hidden;
}

.rp-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.9rem;
    border-radius: var(--rp-radius-full);
    background: rgba(0, 242, 254, 0.1);
    border: 1px solid var(--rp-border-accent);
    color: var(--rp-cyan);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.85rem;
    box-shadow: 0 0 15px rgba(0, 242, 254, 0.15);
}

.rp-hero-title {
    font-size: 2.35rem;
    font-weight: 900;
    line-height: 1.25;
    margin-bottom: 0.65rem;
    color: #ffffff;
    letter-spacing: -0.5px;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.6);
}

.rp-title-accent-cyan {
    background: linear-gradient(135deg, #00f2fe 0%, #38bdf8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 900;
    filter: drop-shadow(0 0 12px rgba(0, 242, 254, 0.45));
}

.rp-title-accent-gold {
    background: linear-gradient(135deg, #ffb703 0%, #ff9100 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 900;
    filter: drop-shadow(0 0 12px rgba(255, 183, 3, 0.4));
}

.rp-hero-desc {
    color: var(--rp-text-muted);
    font-size: 1.05rem;
    max-width: 820px;
}

.rp-hero-features {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.rp-feature-pill {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--rp-text-sub);
}

.rp-feature-pill i {
    color: var(--rp-green);
}

/* Service Navigation Tabs (Tech Bar) */
.rp-tech-tabs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin: 2rem 0 2.5rem;
}

.rp-tech-tab-btn {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 1.1rem 1.25rem;
    background: var(--rp-bg-panel);
    border: 1px solid var(--rp-border);
    border-radius: var(--rp-radius-md);
    cursor: pointer;
    transition: var(--rp-transition);
    position: relative;
    overflow: hidden;
    text-align: left;
}

.rp-tech-tab-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: transparent;
    transition: var(--rp-transition);
}

.rp-tech-tab-btn:hover {
    border-color: var(--rp-border-light);
    background: var(--rp-bg-card-hover);
    transform: translateY(-2px);
}

.rp-tech-tab-btn.active {
    background: var(--rp-bg-card-active);
    border-color: var(--rp-cyan);
    box-shadow: var(--rp-shadow-glow);
}

.rp-tech-tab-btn.active::before {
    background: var(--rp-cyan);
}

.rp-tab-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    margin-bottom: 0.35rem;
}

.rp-tab-icon {
    font-size: 1.35rem;
    color: var(--rp-cyan);
}

.rp-tab-tag {
    font-size: 0.7rem;
    padding: 0.15rem 0.5rem;
    border-radius: var(--rp-radius-full);
    background: rgba(255, 255, 255, 0.08);
    color: var(--rp-text-muted);
    font-weight: 600;
}

.rp-tech-tab-btn.active .rp-tab-tag {
    background: rgba(0, 242, 254, 0.2);
    color: var(--rp-cyan);
}

.rp-tab-title {
    font-weight: 700;
    font-size: 1rem;
    color: var(--rp-text-main);
    margin-bottom: 0.15rem;
}

.rp-tab-subtitle {
    font-size: 0.78rem;
    color: var(--rp-text-muted);
    line-height: 1.3;
}

/* Three-column Main Workspace Layout */
.rp-workspace {
    display: grid;
    grid-template-columns: minmax(320px, 1.15fr) minmax(440px, 1.75fr) minmax(310px, 350px);
    gap: 1.5rem;
    align-items: start;
}

@media (max-width: 1360px) {
    .rp-workspace {
        grid-template-columns: 1fr 1.35fr 320px;
        gap: 1.25rem;
    }
}

@media (max-width: 1100px) {
    .rp-workspace {
        grid-template-columns: 1fr 1fr;
    }
    .rp-summary-col {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    .rp-workspace {
        grid-template-columns: 1fr;
    }
    .rp-summary-col {
        grid-column: span 1;
    }
}

/* Column 1: Configurator Options */
.rp-config-col {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Column 2: 3D Preview Viewer & Upload History */
.rp-viewer-col {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Section Box */
.rp-section-box {
    background: var(--rp-bg-panel);
    border: 1px solid var(--rp-border);
    border-radius: var(--rp-radius-lg);
    padding: 1.75rem;
    box-shadow: var(--rp-shadow-card);
    position: relative;
}

.rp-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--rp-border);
}

.rp-step-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--rp-text-main);
}

.rp-step-num {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--rp-blue), var(--rp-cyan));
    color: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    font-weight: 800;
}

.rp-step-badge {
    font-size: 0.8rem;
    padding: 0.25rem 0.75rem;
    border-radius: var(--rp-radius-full);
    background: rgba(255, 255, 255, 0.05);
    color: var(--rp-text-muted);
}

/* 1. File Upload Dropzone (Compact) */
.rp-dropzone {
    border: 1.5px dashed var(--rp-border-light);
    border-radius: var(--rp-radius-md);
    background: var(--rp-bg-input);
    padding: 1rem 1.25rem;
    text-align: center;
    cursor: pointer;
    transition: var(--rp-transition);
    position: relative;
    overflow: hidden;
}

.rp-dropzone:hover, .rp-dropzone.dragover {
    border-color: var(--rp-cyan);
    background: rgba(0, 242, 254, 0.04);
    box-shadow: var(--rp-shadow-glow);
}

.rp-upload-icon-badge {
    width: 34px;
    height: 34px;
    border-radius: 9px;
    background: rgba(129, 140, 248, 0.16);
    color: #a78bfa;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    margin-bottom: 0.35rem;
    box-shadow: 0 0 10px rgba(167, 139, 250, 0.15);
    transition: var(--rp-transition);
}

.rp-dropzone:hover .rp-upload-icon-badge {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 0 15px rgba(167, 139, 250, 0.25);
}

.rp-dropzone-title {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 0.15rem;
    color: var(--rp-text-main);
}

.rp-selected-file-label {
    font-size: 0.82rem;
    color: var(--rp-text-sub);
    font-weight: 600;
    margin-bottom: 0.15rem;
}

.rp-selected-filename {
    color: var(--rp-cyan);
    font-family: var(--font-mono);
    font-weight: 700;
}

.rp-dropzone-support {
    color: var(--rp-text-muted);
    font-size: 0.75rem;
    margin-bottom: 0.55rem;
}

.rp-dropzone-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 0.25rem;
}

.rp-btn-upload-file {
    background: rgba(167, 139, 250, 0.18);
    color: #c4b5fd;
    border: 1px solid rgba(167, 139, 250, 0.4);
    padding: 0.3rem 0.95rem;
    border-radius: 9999px;
    font-size: 0.78rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.rp-btn-upload-file:hover {
    background: rgba(167, 139, 250, 0.35);
    border-color: #a78bfa;
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(167, 139, 250, 0.25);
}

.rp-btn-clear-file {
    background: rgba(239, 68, 68, 0.85);
    color: #fff;
    border: 1px solid rgba(239, 68, 68, 0.9);
    padding: 0.3rem 0.95rem;
    border-radius: 9999px;
    font-size: 0.78rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.rp-btn-clear-file:hover {
    background: #dc2626;
    border-color: #ef4444;
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(239, 68, 68, 0.35);
}

.rp-demo-models-bar {
    margin-top: 0.65rem;
    padding-top: 0.55rem;
    border-top: 1px solid var(--rp-border);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.rp-demo-label {
    font-size: 0.76rem;
    color: var(--rp-text-muted);
}

.rp-demo-btn {
    font-size: 0.75rem;
    padding: 0.22rem 0.65rem;
    border-radius: var(--rp-radius-full);
    background: var(--rp-bg-card);
    border: 1px solid var(--rp-border-light);
    color: var(--rp-cyan);
    cursor: pointer;
    transition: var(--rp-transition);
}

.rp-demo-btn:hover {
    background: var(--rp-bg-card-hover);
    border-color: var(--rp-cyan);
}

/* Quick 3D Color Swatches Bar (15 Colors) */
.rp-viewer-quick-colors {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    background: rgba(17, 23, 38, 0.92);
    padding: 0.25rem 0.65rem;
    border-radius: 9999px;
    border: 1px solid var(--rp-border);
    flex-wrap: wrap;
}

.rp-quick-color-dot {
    width: 15px;
    height: 15px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    flex-shrink: 0;
    padding: 0;
    outline: none;
}

.rp-quick-color-dot:hover {
    transform: scale(1.3);
    border-color: #ffffff;
}

.rp-quick-color-dot.active {
    transform: scale(1.35);
    border: 2px solid #ffffff !important;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.8) !important;
}

/* Uploaded File List & Active Part Preview */
.rp-uploaded-parts {
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.rp-part-card {
    display: grid;
    grid-template-columns: 80px 1fr auto;
    gap: 1.25rem;
    align-items: center;
    padding: 1rem 1.25rem;
    background: var(--rp-bg-card);
    border: 1px solid var(--rp-border);
    border-radius: var(--rp-radius-md);
    transition: var(--rp-transition);
}

.rp-part-card.active {
    border-color: var(--rp-cyan);
    box-shadow: 0 0 15px rgba(0, 242, 254, 0.15);
    background: rgba(0, 242, 254, 0.05);
}

.rp-part-thumb {
    width: 80px;
    height: 80px;
    border-radius: var(--rp-radius-sm);
    background: radial-gradient(circle at 50% 35%, #1e294b 0%, #0c1322 100%);
    border: 1.5px solid rgba(0, 242, 254, 0.35);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4), inset 0 0 15px rgba(0, 242, 254, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--rp-cyan);
    font-size: 1.75rem;
    overflow: hidden;
    position: relative;
    padding: 4px;
}

.rp-part-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scale(1.25);
    filter: drop-shadow(0 6px 12px rgba(0, 0, 0, 0.6));
    transition: transform 0.25s ease;
}

.rp-part-thumb:hover img {
    transform: scale(1.4);
}

.rp-part-info {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.rp-part-name {
    font-weight: 700;
    font-size: 1rem;
    color: var(--rp-text-main);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.rp-part-specs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    font-size: 0.8rem;
    color: var(--rp-text-muted);
}

.rp-part-specs span {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.rp-part-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.rp-icon-btn {
    width: 36px;
    height: 36px;
    border-radius: var(--rp-radius-sm);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--rp-border);
    color: var(--rp-text-sub);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--rp-transition);
}

.rp-icon-btn:hover {
    background: rgba(255, 255, 255, 0.12);
    color: var(--rp-text-main);
}

.rp-icon-btn.delete:hover {
    background: rgba(255, 0, 127, 0.2);
    border-color: var(--rp-magenta);
    color: var(--rp-magenta);
}

/* 2. Interactive 3D Model Viewer */
.rp-viewer-container {
    margin-top: 1.5rem;
    border-radius: var(--rp-radius-md);
    background: #0a0f1d;
    border: 1px solid var(--rp-border-accent);
    position: relative;
    overflow: hidden;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5), 0 0 20px rgba(0, 242, 254, 0.08);
}

.rp-3d-canvas-wrap {
    width: 100%;
    height: 380px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.rp-3d-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

.rp-viewer-overlay {
    position: absolute;
    top: 1rem;
    left: 1rem;
    z-index: 10;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    pointer-events: none;
}

.rp-viewer-badge {
    pointer-events: auto;
    padding: 0.3rem 0.75rem;
    border-radius: var(--rp-radius-full);
    background: rgba(17, 23, 38, 0.85);
    backdrop-filter: blur(8px);
    border: 1px solid var(--rp-border);
    font-size: 0.78rem;
    color: var(--rp-cyan);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.rp-viewer-dimensions {
    pointer-events: auto;
    padding: 0.4rem 0.8rem;
    border-radius: var(--rp-radius-sm);
    background: rgba(9, 13, 22, 0.9);
    border: 1px solid var(--rp-border);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--rp-text-main);
}

.rp-viewer-toolbar {
    position: absolute;
    bottom: 1rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.4rem 0.75rem;
    border-radius: var(--rp-radius-full);
    background: rgba(13, 21, 38, 0.94);
    backdrop-filter: blur(12px);
    border: 1.5px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.rp-view-tool-btn {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    border: 1.5px solid rgba(255, 255, 255, 0.14);
    color: #cbd5e1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.rp-view-tool-btn i {
    color: #cbd5e1;
    font-size: 0.85rem;
    transition: all 0.2s ease;
}

.rp-view-tool-btn:hover {
    background: rgba(0, 242, 254, 0.2);
    color: #00f2fe;
    border-color: #00f2fe;
    transform: translateY(-2px);
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.35);
}

.rp-view-tool-btn:hover i {
    color: #00f2fe;
}

.rp-view-tool-btn.active {
    background: linear-gradient(135deg, #00f2fe, #00b4d8);
    color: #040814;
    border-color: #ffffff;
    box-shadow: 0 0 14px rgba(0, 242, 254, 0.6), inset 0 0 6px rgba(255, 255, 255, 0.4);
    transform: scale(1.08);
}

.rp-view-tool-btn.active i {
    color: #040814 !important;
    font-weight: 900;
    filter: none;
}

.rp-view-tool-btn.flash {
    animation: toolBtnPulse 0.4s ease;
}

@keyframes toolBtnPulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.25); background: rgba(0, 242, 254, 0.4); border-color: #ffffff; }
    100% { transform: scale(1); }
}

.rp-viewer-help {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 10;
    padding: 0.35rem 0.75rem;
    border-radius: var(--rp-radius-full);
    background: rgba(17, 23, 38, 0.85);
    backdrop-filter: blur(8px);
    border: 1px solid var(--rp-border);
    font-size: 0.75rem;
    color: var(--rp-text-sub);
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    pointer-events: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.rp-viewer-help i {
    color: var(--rp-cyan);
}

/* Manual Dimension Inputs */
.rp-dimensions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr) 100px;
    gap: 1rem;
    margin-top: 1.25rem;
}

.rp-input-group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.rp-input-label {
    font-size: 0.8rem;
    color: var(--rp-text-muted);
    font-weight: 500;
}

.rp-input-wrap {
    position: relative;
    display: flex;
    align-items: center;
}

.rp-input {
    width: 100%;
    padding: 0.65rem 2.2rem 0.65rem 0.85rem;
    background: var(--rp-bg-input);
    border: 1px solid var(--rp-border);
    border-radius: var(--rp-radius-sm);
    color: var(--rp-text-main);
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 600;
    transition: var(--rp-transition);
}

.rp-input::-webkit-outer-spin-button,
.rp-input::-webkit-inner-spin-button,
.rp-qty-direct-input::-webkit-outer-spin-button,
.rp-qty-direct-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.rp-input[type=number],
.rp-qty-direct-input {
    -moz-appearance: textfield;
    appearance: textfield;
}

.rp-input:focus {
    outline: none;
    border-color: var(--rp-cyan);
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.2);
}

.rp-input-unit {
    position: absolute;
    right: 0.75rem;
    font-size: 0.8rem;
    color: var(--rp-text-dim);
    pointer-events: none;
}

/* Step 2: Material Grid */
.rp-material-categories {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
}

.rp-mat-cat-btn {
    padding: 0.5rem 1rem;
    border-radius: var(--rp-radius-full);
    background: var(--rp-bg-card);
    border: 1px solid var(--rp-border);
    color: var(--rp-text-sub);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--rp-transition);
}

.rp-mat-cat-btn:hover {
    border-color: var(--rp-border-light);
    color: var(--rp-text-main);
}

.rp-mat-cat-btn.active {
    background: linear-gradient(135deg, rgba(79, 172, 254, 0.2), rgba(0, 242, 254, 0.2));
    border-color: var(--rp-cyan);
    color: var(--rp-cyan);
}

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

@media (max-width: 580px) {
    .rp-materials-grid {
        grid-template-columns: 1fr;
    }
}

.rp-material-card {
    background: var(--rp-bg-card);
    border: 1px solid var(--rp-border);
    border-radius: var(--rp-radius-md);
    padding: 0.85rem;
    cursor: pointer;
    transition: var(--rp-transition);
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.rp-material-card:hover {
    border-color: var(--rp-border-light);
    background: var(--rp-bg-card-hover);
    transform: translateY(-2px);
}

.rp-material-card.active {
    border-color: var(--rp-cyan);
    background: var(--rp-bg-card-active);
    box-shadow: var(--rp-shadow-glow);
}

.rp-mat-badge {
    font-size: 0.65rem;
    font-weight: 700;
    padding: 0.12rem 0.4rem;
    border-radius: 4px;
    background: rgba(0, 230, 118, 0.15);
    color: var(--rp-green);
    border: 1px solid rgba(0, 230, 118, 0.3);
    white-space: nowrap;
    flex-shrink: 0;
    margin-left: auto;
}

.rp-mat-badge.hot {
    background: rgba(255, 183, 3, 0.15);
    color: var(--rp-gold);
    border-color: rgba(255, 183, 3, 0.3);
}

.rp-mat-header {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    margin-bottom: 0.4rem;
    flex-wrap: nowrap;
}

.rp-mat-color-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 0 5px rgba(255, 255, 255, 0.1);
    flex-shrink: 0;
}

.rp-mat-name {
    font-weight: 700;
    font-size: 0.88rem;
    color: var(--rp-text-main);
    line-height: 1.25;
}

.rp-mat-desc {
    font-size: 0.75rem;
    color: var(--rp-text-muted);
    margin-bottom: 0.65rem;
    line-height: 1.3;
}

.rp-mat-props {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    font-size: 0.7rem;
    color: var(--rp-text-dim);
    margin-bottom: 0.65rem;
    padding: 0.35rem 0.45rem;
    background: var(--rp-bg-input);
    border-radius: var(--rp-radius-sm);
}

.rp-mat-props-row {
    display: flex;
    justify-content: space-between;
}

.rp-mat-price-tag {
    font-size: 0.8rem;
    color: var(--rp-cyan);
    font-weight: 600;
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.5rem;
    border-top: 1px solid var(--rp-border);
    padding-top: 0.5rem;
    flex-wrap: wrap;
}

/* Step 3: Surface Finishing & Colors */
.rp-finish-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 0.9rem;
    margin-bottom: 1.5rem;
}

.rp-finish-card {
    background: var(--rp-bg-card);
    border: 1px solid var(--rp-border);
    border-radius: var(--rp-radius-md);
    padding: 0.9rem;
    cursor: pointer;
    transition: var(--rp-transition);
    text-align: left;
}

.rp-finish-card:hover {
    border-color: var(--rp-border-light);
    background: var(--rp-bg-card-hover);
}

.rp-finish-card.active {
    border-color: var(--rp-cyan);
    background: var(--rp-bg-card-active);
    box-shadow: 0 0 15px rgba(0, 242, 254, 0.15);
}

.rp-finish-title {
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--rp-text-main);
    margin-bottom: 0.2rem;
}

.rp-finish-desc {
    font-size: 0.75rem;
    color: var(--rp-text-muted);
}

.rp-color-picker-section {
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--rp-border);
}

.rp-color-options {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 0.75rem;
}

.rp-color-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.8rem;
    border-radius: var(--rp-radius-full);
    background: var(--rp-bg-card);
    border: 1px solid var(--rp-border);
    cursor: pointer;
    font-size: 0.82rem;
    color: var(--rp-text-sub);
    transition: var(--rp-transition);
}

.rp-color-btn:hover {
    border-color: var(--rp-border-light);
}

.rp-color-btn.active {
    border-color: var(--rp-cyan);
    background: rgba(0, 242, 254, 0.1);
    color: var(--rp-cyan);
}

.rp-swatch {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

/* Step 4: Tolerance & Quantity Matrix */
.rp-options-row {
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
    margin-bottom: 1.25rem;
}

.rp-select-group {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.rp-choice-chips {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
    width: 100%;
}

.rp-chip-btn {
    padding: 0.5rem 0.4rem;
    background: var(--rp-bg-card);
    border: 1px solid var(--rp-border);
    border-radius: var(--rp-radius-sm);
    color: var(--rp-text-sub);
    font-size: 0.82rem;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--rp-transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.15rem;
    min-height: 52px;
}

.rp-chip-btn:hover {
    border-color: var(--rp-border-light);
    background: var(--rp-bg-card-hover);
}

.rp-chip-btn.active {
    background: var(--rp-bg-card-active);
    border-color: var(--rp-cyan);
    color: var(--rp-cyan);
    box-shadow: 0 0 12px rgba(0, 242, 254, 0.15);
}

.rp-chip-val {
    font-size: 0.88rem;
    font-weight: 700;
}

.rp-chip-sub {
    font-size: 0.72rem;
    color: var(--rp-text-muted);
}

.rp-chip-btn.active .rp-chip-sub {
    color: rgba(0, 242, 254, 0.85);
}

/* Quantity Matrix & Tier Pricing */
.rp-qty-matrix-wrap {
    margin-top: 1.5rem;
}

.rp-matrix-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.rp-qty-tiers-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.65rem;
}

@media (max-width: 600px) {
    .rp-qty-tiers-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.rp-qty-tier-card {
    background: var(--rp-bg-input);
    border: 1px solid var(--rp-border);
    border-radius: var(--rp-radius-sm);
    padding: 0.75rem 0.5rem;
    text-align: center;
    cursor: pointer;
    transition: var(--rp-transition);
}

.rp-qty-tier-card:hover {
    border-color: var(--rp-border-light);
    background: var(--rp-bg-card);
}

.rp-qty-tier-card.active {
    border-color: var(--rp-cyan);
    background: rgba(0, 242, 254, 0.1);
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.2);
}

.rp-tier-qty {
    font-size: 0.95rem;
    font-weight: 800;
    color: var(--rp-text-main);
}

.rp-tier-unit-price {
    font-size: 0.75rem;
    color: var(--rp-cyan);
    margin: 0.15rem 0;
}

.rp-tier-discount {
    font-size: 0.68rem;
    color: var(--rp-green);
    font-weight: 700;
}

.rp-custom-qty-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
    padding: 0.85rem 1rem;
    background: var(--rp-bg-input);
    border-radius: var(--rp-radius-sm);
    border: 1px solid var(--rp-border);
}

.rp-custom-qty-label {
    font-size: 0.85rem;
    color: var(--rp-text-muted);
    white-space: nowrap;
}

.rp-qty-counter {
    display: flex;
    align-items: center;
    border: 1px solid var(--rp-border-light);
    border-radius: var(--rp-radius-sm);
    overflow: hidden;
}

.rp-qty-btn {
    width: 36px;
    height: 36px;
    background: var(--rp-bg-card);
    color: var(--rp-text-main);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    cursor: pointer;
    transition: var(--rp-transition);
}

.rp-qty-btn:hover {
    background: var(--rp-bg-card-hover);
    color: var(--rp-cyan);
}

.rp-qty-input {
    width: 60px;
    height: 36px;
    text-align: center;
    background: var(--rp-bg-panel);
    border: none;
    color: var(--rp-text-main);
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.95rem;
}

/* Right Column: Sticky Quote Summary Card */
.rp-summary-col {
    position: sticky;
    top: 1rem;
    z-index: 10;
}

.rp-quote-card {
    background: var(--rp-bg-panel);
    border: 1px solid var(--rp-border-accent);
    border-radius: var(--rp-radius-lg);
    padding: 1.75rem;
    box-shadow: var(--rp-shadow-card), 0 0 30px rgba(0, 242, 254, 0.05);
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.rp-quote-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--rp-border);
}

.rp-quote-card-title {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--rp-text-main);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.rp-live-indicator {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.75rem;
    color: var(--rp-green);
    font-weight: 600;
}

.rp-live-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--rp-green);
    box-shadow: 0 0 8px var(--rp-green);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); opacity: 0.8; }
    50% { transform: scale(1.2); opacity: 1; }
    100% { transform: scale(0.95); opacity: 0.8; }
}

/* Price Breakdown List */
.rp-price-breakdown {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.rp-breakdown-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.88rem;
    color: var(--rp-text-sub);
}

.rp-breakdown-row.highlight {
    color: var(--rp-green);
}

.rp-breakdown-val {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--rp-text-main);
}

.rp-total-price-box {
    margin: 0.5rem 0;
    padding: 1.25rem;
    border-radius: var(--rp-radius-md);
    background: linear-gradient(135deg, rgba(0, 242, 254, 0.08), rgba(79, 172, 254, 0.04));
    border: 1px solid var(--rp-border-accent);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.rp-total-label {
    font-size: 0.82rem;
    color: var(--rp-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.rp-total-amount {
    font-size: 2rem;
    font-weight: 800;
    font-family: var(--font-mono);
    color: var(--rp-cyan);
    text-shadow: 0 0 20px rgba(0, 242, 254, 0.4);
}

.rp-unit-price-preview {
    font-size: 0.82rem;
    color: var(--rp-text-muted);
}

.rp-lead-time-box {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.85rem;
    background: var(--rp-bg-input);
    border-radius: var(--rp-radius-sm);
    border: 1px solid var(--rp-border);
    font-size: 0.82rem;
    color: var(--rp-text-sub);
}

.rp-lead-time-box i {
    font-size: 1.2rem;
    color: var(--rp-gold);
}

/* Action Buttons */
.rp-quote-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.rp-btn-order {
    width: 100%;
    padding: 0.95rem;
    background: linear-gradient(135deg, var(--rp-blue), var(--rp-cyan));
    color: #050811;
    font-weight: 800;
    font-size: 1.05rem;
    border-radius: var(--rp-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: 0 4px 20px rgba(0, 242, 254, 0.4);
    transition: var(--rp-transition);
}

.rp-btn-order:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(0, 242, 254, 0.6);
}

.rp-btn-zalo {
    width: 100%;
    padding: 0.85rem;
    background: #0068ff;
    color: #ffffff;
    font-weight: 700;
    font-size: 0.95rem;
    border-radius: var(--rp-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: var(--rp-transition);
}

.rp-btn-zalo:hover {
    background: #0052cc;
    transform: translateY(-2px);
}

.rp-btn-pdf {
    width: 100%;
    padding: 0.75rem;
    background: var(--rp-bg-card);
    border: 1px solid var(--rp-border-light);
    color: var(--rp-text-sub);
    font-weight: 600;
    font-size: 0.88rem;
    border-radius: var(--rp-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: var(--rp-transition);
}

.rp-btn-pdf:hover {
    background: var(--rp-bg-card-hover);
    color: var(--rp-text-main);
    border-color: var(--rp-cyan);
}

/* Guarantee / Trust Badges */
.rp-trust-badges {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.6rem;
    margin-top: 0.5rem;
}

.rp-trust-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.75rem;
    color: var(--rp-text-muted);
}

.rp-trust-item i {
    color: var(--rp-green);
}

/* Comparison Section (In 3D vs CNC vs Đúc vs Kim Loại Tấm) */
.rp-compare-section {
    margin-top: 4rem;
}

.rp-section-title-center {
    text-align: center;
    margin-bottom: 2.5rem;
}

.rp-section-title-center h2 {
    font-size: 1.85rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    color: var(--rp-text-main);
}

.rp-compare-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.rp-compare-card {
    background: var(--rp-bg-panel);
    border: 1px solid var(--rp-border);
    border-radius: var(--rp-radius-lg);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: var(--rp-transition);
}

.rp-compare-card:hover {
    border-color: var(--rp-border-accent);
    transform: translateY(-4px);
}

.rp-compare-icon {
    font-size: 2rem;
    color: var(--rp-cyan);
}

.rp-compare-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--rp-text-main);
}

.rp-compare-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    font-size: 0.85rem;
    color: var(--rp-text-sub);
}

.rp-compare-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.45rem;
}

.rp-compare-list li i {
    margin-top: 0.2rem;
    color: var(--rp-cyan);
    font-size: 0.75rem;
}

/* Order / Checkout Modal */
.rp-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(4, 7, 14, 0.85);
    backdrop-filter: blur(12px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.rp-modal.active {
    opacity: 1;
    visibility: visible;
}

.rp-modal-dialog {
    background: var(--rp-bg-panel);
    border: 1px solid var(--rp-border-accent);
    border-radius: var(--rp-radius-lg);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), var(--rp-shadow-neon);
    display: flex;
    flex-direction: column;
}

.rp-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--rp-border);
}

.rp-modal-title {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--rp-text-main);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.rp-modal-close {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    color: var(--rp-text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--rp-transition);
}

.rp-modal-close:hover {
    background: rgba(255, 0, 127, 0.2);
    color: var(--rp-magenta);
}

.rp-modal-body {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.rp-form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.rp-form-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--rp-text-sub);
}

.rp-form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--rp-bg-input);
    border: 1px solid var(--rp-border);
    border-radius: var(--rp-radius-sm);
    color: var(--rp-text-main);
    font-size: 0.95rem;
    transition: var(--rp-transition);
}

.rp-form-input:focus {
    outline: none;
    border-color: var(--rp-cyan);
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.2);
}

.rp-vietqr-box {
    background: var(--rp-bg-input);
    border: 1px solid var(--rp-border-accent);
    border-radius: var(--rp-radius-md);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.75rem;
}

.rp-vietqr-img {
    width: 180px;
    height: 180px;
    border-radius: var(--rp-radius-sm);
    background: #fff;
    padding: 0.5rem;
}

/* Printable PDF / Quote Template */
.rp-print-only {
    display: none !important;
}

@media print {
    @page {
        size: A4 portrait;
        margin: 10mm 15mm;
    }
    html, body, body.rp-main-wrapper {
        zoom: 1 !important;
        margin: 0 !important;
        padding: 0 !important;
        background: #ffffff !important;
        color: #000000 !important;
        width: 100% !important;
        height: auto !important;
        min-height: auto !important;
        overflow: visible !important;
    }
    .top-banner,
    .main-header,
    .rp-hero,
    main,
    .rp-workspace,
    .rp-compare-section,
    .main-footer,
    .rp-modal-backdrop,
    .rp-toast,
    #order-modal,
    #material-modal,
    header,
    footer,
    nav {
        display: none !important;
        visibility: hidden !important;
        height: 0 !important;
        overflow: hidden !important;
    }
    .rp-print-only,
    #rp-printable-quote {
        display: block !important;
        position: static !important;
        width: 100% !important;
        margin: 0 !important;
        padding: 0 !important;
        background: #ffffff !important;
        color: #1e293b !important;
        visibility: visible !important;
        box-sizing: border-box !important;
        page-break-after: avoid !important;
        page-break-inside: avoid !important;
    }
    #rp-printable-quote * {
        visibility: visible !important;
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }
}

/* ==========================================================================
   Diff3D Visual Comparison & Advanced 3D Inspector Enhancements
   ========================================================================== */

.rp-viewer-header-tabs {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    background: rgba(13, 19, 34, 0.95);
    border-bottom: 1px solid var(--rp-border);
    flex-wrap: wrap;
    gap: 0.75rem;
}

.rp-viewer-tab-group {
    display: flex;
    gap: 0.35rem;
    background: rgba(0, 0, 0, 0.45);
    padding: 4px;
    border-radius: var(--rp-radius-sm);
    border: 1px solid var(--rp-border);
}

.rp-viewer-tab-btn {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.45rem 0.95rem;
    border-radius: 6px;
    background: transparent;
    border: none;
    color: #94a3b8;
    font-size: 0.84rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--rp-transition);
}

.rp-viewer-tab-btn:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.08);
}

.rp-viewer-tab-btn.active {
    background: var(--rp-cyan);
    color: #050811;
    font-weight: 800;
    box-shadow: 0 0 14px rgba(0, 242, 254, 0.45);
}

.rp-viewer-tab-btn.diff-active {
    background: linear-gradient(135deg, #00e676, #00f2fe);
    color: #050811;
    font-weight: 800;
}

/* Diff3D Controls Sub-panel */
.rp-diff-controls-bar {
    background: #0b1120;
    border-bottom: 1.5px solid var(--rp-border-accent);
    padding: 0.85rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    animation: fadeIn 0.3s ease;
}

.rp-diff-model-selectors {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.rp-diff-slot {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.4rem 0.85rem;
    border-radius: var(--rp-radius-sm);
    font-size: 0.82rem;
    font-weight: 700;
    border: 1.5px solid var(--rp-border);
    background: #111827;
}

.rp-diff-slot select {
    background: #0f172a;
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 6px;
    padding: 0.3rem 0.6rem;
    font-size: 0.82rem;
    font-weight: 700;
}

.rp-diff-slot.base {
    border-color: #ff007f;
    color: #ff3377;
    background: rgba(255, 0, 127, 0.12);
}

.rp-diff-slot.target {
    border-color: #00e676;
    color: #00e676;
    background: rgba(0, 230, 118, 0.12);
}

.rp-diff-legend {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.82rem;
    font-weight: 700;
    color: #f1f5f9;
}

.rp-diff-legend-item {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.rp-diff-color-pill {
    width: 10px;
    height: 10px;
    border-radius: 2px;
}

.rp-diff-color-pill.unchanged { background: #64748b; }
.rp-diff-color-pill.added { background: #00e676; box-shadow: 0 0 6px #00e676; }
.rp-diff-color-pill.removed { background: #ff0055; box-shadow: 0 0 6px #ff0055; }

.rp-diff-slider-wrap {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.78rem;
    color: var(--rp-text-sub);
}

.rp-range-input {
    accent-color: var(--rp-cyan);
    cursor: pointer;
    width: 110px;
}

/* Slicing / Sectioning Controls Sub-panel */
.rp-slice-controls-bar {
    background: rgba(9, 13, 22, 0.95);
    border-bottom: 1px solid var(--rp-border-accent);
    padding: 0.75rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    animation: fadeIn 0.3s ease;
}

.rp-slice-axis-btns {
    display: flex;
    gap: 0.35rem;
}

.rp-axis-btn {
    padding: 0.25rem 0.65rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--rp-radius-sm);
    border: 1px solid var(--rp-border);
    background: rgba(255, 255, 255, 0.05);
    color: var(--rp-text-sub);
    cursor: pointer;
    transition: var(--rp-transition);
}

.rp-axis-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
    border-color: var(--rp-border-light);
}

.rp-axis-btn.active {
    background: rgba(0, 242, 254, 0.16);
    color: var(--rp-cyan);
    border-color: var(--rp-cyan);
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.2);
}

/* Specific soft background styles for Diff Rev A & Rev B buttons */
.rp-diff-target-btn {
    padding: 0.25rem 0.65rem;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: var(--rp-radius-sm);
    cursor: pointer;
    transition: var(--rp-transition);
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.rp-diff-target-btn.part-a {
    background: rgba(255, 0, 85, 0.06);
    border: 1px solid rgba(255, 0, 85, 0.3);
    color: rgba(255, 100, 140, 0.8);
}

.rp-diff-target-btn.part-a:hover, .rp-diff-target-btn.part-a.active {
    background: rgba(255, 0, 85, 0.16);
    border-color: #ff0055;
    color: #ff3366;
    box-shadow: 0 0 10px rgba(255, 0, 85, 0.2);
}

.rp-diff-target-btn.part-b {
    background: rgba(0, 230, 118, 0.06);
    border: 1px solid rgba(0, 230, 118, 0.3);
    color: rgba(0, 230, 118, 0.8);
}

.rp-diff-target-btn.part-b:hover, .rp-diff-target-btn.part-b.active {
    background: rgba(0, 230, 118, 0.16);
    border-color: #00e676;
    color: #00e676;
    box-shadow: 0 0 10px rgba(0, 230, 118, 0.2);
}

/* 3D Geometry Live Analytics Bar */
.rp-mesh-analytics-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(125px, 1fr));
    gap: 0.75rem;
    padding: 0.85rem 1.25rem;
    background: rgba(9, 13, 22, 0.7);
    border-top: 1px solid var(--rp-border);
}

.rp-analytic-card {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.rp-analytic-label {
    font-size: 0.72rem;
    color: var(--rp-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.rp-analytic-val {
    font-size: 0.92rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--rp-text-main);
}

.rp-analytic-val.cyan { color: var(--rp-cyan); }
.rp-analytic-val.green { color: var(--rp-green); }
.rp-analytic-val.gold { color: var(--rp-gold); }

/* Loading Spinner inside Canvas */
.rp-3d-loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(6, 9, 17, 0.85);
    backdrop-filter: blur(8px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    z-index: 50;
    transition: opacity 0.3s ease;
}

.rp-3d-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid rgba(0, 242, 254, 0.15);
    border-top-color: var(--rp-cyan);
    border-right-color: var(--rp-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-5px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Toast */
.rp-toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    padding: 0.75rem 1.25rem;
    background: var(--rp-bg-panel);
    border: 1px solid var(--rp-cyan);
    border-radius: var(--rp-radius-md);
    color: var(--rp-cyan);
    font-weight: 600;
    font-size: 0.9rem;
    box-shadow: var(--rp-shadow-neon);
    z-index: 10000;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    animation: fadeIn 0.3s ease;
}