/* ==========================================================================
   ArchitecturalNumbers.com — SignBuilder 2.0 & Consolidated Storefront CSS
   Scoped isolated styles for the next-generation single-page experience
   ========================================================================== */

:root {
    --primary-blue: #0d47a1;
    --primary-blue-dark: #082d66;
    --accent-gold: #ffcc00;
    --accent-red: #d32f2f;
    --accent-cyan: #00bcd4;
    --accent-cyan-dark: #0097a7;
    --bg-light: #f7f9fa;
    --bg-card: #ffffff;
    --border-color: #d1d9e0;
    --text-primary: #1c2128;
    --text-secondary: #57606a;
    --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --header-height: 52px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-stack);
    background-color: var(--bg-light);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--primary-blue);
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}

/* ==========================================================================
   Top Masthead & Sticky Auto-Hiding Navigation
   ========================================================================== */

.site-masthead {
    background: #ffffff;
    border-bottom: 1px solid var(--border-color);
    padding: 12px 20px;
}

.masthead-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.masthead-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-iso-logo {
    width: 36px;
    height: auto;
    object-fit: contain;
    flex-shrink: 0;
}

.brand-titles {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-blue);
    letter-spacing: -0.5px;
}

.brand-contact {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    gap: 12px;
}
.brand-contact a {
    color: var(--text-secondary);
    font-weight: 600;
}

.masthead-tagline {
    display: flex;
    align-items: center;
    justify-content: flex-end;
}
.brand-tagline-img {
    height: 52px;
    width: auto;
    max-width: 100%;
    object-fit: contain;
}

/* Sticky Navigation Bar */
.sticky-nav-wrapper {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: #fff8e1;
    border-bottom: 2px solid #ffe082;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    transition: transform 0.28s ease-in-out;
}

.sticky-nav-wrapper.nav-hidden {
    transform: translateY(-100%);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 16px;
    overflow-x: auto;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 4px;
}

.nav-item a {
    display: block;
    padding: 12px 18px;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--primary-blue);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
    white-space: nowrap;
    transition: background 0.15s, color 0.15s;
}

.nav-item a:hover {
    text-decoration: none;
    background: rgba(13, 71, 161, 0.08);
}

.nav-item.active a {
    color: var(--primary-blue-dark);
    background: rgba(13, 71, 161, 0.12);
}

.nav-item.active a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-red);
}

.nav-cart-btn {
    background: var(--primary-blue);
    color: #ffffff !important;
    padding: 8px 16px;
    border-radius: 6px;
    font-weight: 700;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: none;
    cursor: pointer;
    transition: background 0.15s;
}
.nav-cart-btn:hover {
    background: var(--primary-blue-dark);
    text-decoration: none;
}
.cart-badge {
    background: var(--accent-red);
    color: #fff;
    padding: 2px 7px;
    border-radius: 10px;
    font-size: 0.75rem;
}

/* ==========================================================================
   Section Containers
   ========================================================================== */

.storefront-section {
    max-width: 1200px;
    margin: 30px auto;
    padding: 0 16px;
}

.section-header-banner {
    background: #e3f2fd;
    border: 1px solid #bbdefb;
    color: var(--primary-blue);
    font-size: 1.3rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 10px 16px;
    margin-bottom: 18px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Welcome / Hero */
.welcome-hero-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    align-items: center;
}

.welcome-copy h1 {
    font-size: 2rem;
    color: var(--primary-blue);
    margin-bottom: 12px;
    line-height: 1.2;
}
.welcome-copy p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}
.welcome-cta-btn {
    display: inline-block;
    background: var(--accent-gold);
    color: #212121;
    font-weight: 800;
    padding: 12px 24px;
    border-radius: 6px;
    text-transform: uppercase;
    font-size: 0.95rem;
    box-shadow: 0 2px 6px rgba(0,0,0,0.12);
}
.welcome-cta-btn:hover {
    background: #ffb300;
    text-decoration: none;
}

.welcome-highlights {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}
.highlight-pill {
    background: #f1f8e9;
    border: 1px solid #c5e1a5;
    border-radius: 6px;
    padding: 12px;
    font-size: 0.9rem;
    font-weight: 600;
    color: #33691e;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ==========================================================================
   Gallery Section
   ========================================================================== */

.gallery-container {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
    max-height: 520px;
    overflow-y: auto;
    padding-right: 6px;
}

.gallery-card {
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow: hidden;
    background: #fff;
    transition: transform 0.18s, box-shadow 0.18s;
}
.gallery-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}
.gallery-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    display: block;
}
.gallery-card-caption {
    padding: 10px 12px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    background: #fafbfc;
    border-top: 1px solid #eaeef2;
}

/* ==========================================================================
   SignBuilder 2.0 ("PERSONALIZE")
   ========================================================================== */

.personalize-section {
    position: relative;
}

/* Mobile Portrait Rotation Prompt */
.orientation-rotate-notice {
    display: none;
    background: linear-gradient(135deg, #fff3e0, #ffe0b2);
    border: 1px solid #ffb74d;
    color: #e65100;
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(230,81,0,0.1);
}
.orientation-rotate-notice svg {
    flex-shrink: 0;
    animation: rotatePhone 2.5s infinite ease-in-out;
}
@keyframes rotatePhone {
    0%, 100% { transform: rotate(0deg); }
    50% { transform: rotate(90deg); }
}

/* Three-Column Modular Builder Grid (Vahag Spec: 300px Style / 540px Center / 180px Size = 1020px Total) */
.builder-grid {
    display: grid;
    grid-template-columns: 300px 540px 180px;
    gap: 12px;
    justify-content: center;
    max-width: 1044px;
    margin: 0 auto;
    align-items: start;
    box-sizing: border-box;
}

/* Column 1: Select Style (300px x 450px) */
.builder-col-style {
    width: 300px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    box-sizing: border-box;
}

.builder-col-style .builder-box:first-child {
    height: 450px;
    display: flex;
    flex-direction: column;
}

.builder-box {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.box-title-bar {
    background: var(--accent-gold);
    color: #212121;
    font-weight: 800;
    font-size: 1rem;
    padding: 8px 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    text-align: center;
}

.style-scroll-list {
    flex: 1;
    overflow-y: auto;
    padding: 2px;
}

.style-item {
    min-height: 64px;
    height: auto;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 7px 12px;
    border-bottom: 1px solid #f0f0f0;
    cursor: pointer;
    transition: background 0.12s;
    border-radius: 4px;
}
.style-item:hover {
    background: #f8f9fa;
}
.style-item.selected {
    background: #fff9c4;
    border: 2px solid var(--accent-red);
}
.style-item-name {
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--primary-blue);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 6px;
    line-height: 1.25;
}
.style-name-text {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    letter-spacing: 0.2px;
}
.style-badge-best {
    background: #4caf50;
    color: white;
    font-size: 0.62rem;
    padding: 1.5px 5px;
    border-radius: 4px;
    font-weight: 700;
    white-space: nowrap;
    flex-shrink: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    letter-spacing: 0.5px;
}
.style-item-preview {
    font-size: 1.15rem;
    margin-top: 3px;
    color: #333;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    line-height: 1.2;
}

/* Worldwide Proof Map */
.worldwide-map-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
}
.map-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}
.map-title {
    font-size: 0.85rem;
    font-weight: 800;
    color: var(--primary-blue);
    text-transform: uppercase;
}
.map-stat-badge {
    background: #e8f5e9;
    color: #2e7d32;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 10px;
}
.map-svg-wrapper {
    background: #f0f4f8;
    border-radius: 6px;
    padding: 6px;
    position: relative;
}
.map-svg {
    width: 100%;
    height: auto;
    display: block;
}
.map-pulse-pin {
    animation: mapPulse 2s infinite ease-in-out;
    transform-origin: center;
}
@keyframes mapPulse {
    0% { transform: scale(0.9); opacity: 0.4; }
    50% { transform: scale(1.6); opacity: 0.1; }
    100% { transform: scale(0.9); opacity: 0.4; }
}
.map-footer-caption {
    font-size: 0.72rem;
    color: var(--text-secondary);
    margin-top: 6px;
    text-align: center;
    line-height: 1.2;
}

/* Column 2: 3D Canvas, Controls & Finish Swatches (540px wide) */
.builder-col-center {
    width: 540px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    box-sizing: border-box;
}

.canvas-viewport-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    position: relative;
    overflow: hidden;
    width: 100%;
    box-sizing: border-box;
}

.canvas-header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 14px;
    background: #fafbfc;
    border-bottom: 1px solid #eaeef2;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.canvas-container {
    width: 100%;
    height: 300px;
    background: radial-gradient(circle at center, #ffffff 40%, #eef2f5 100%);
    position: relative;
    cursor: grab;
}
.canvas-container:active {
    cursor: grabbing;
}

/* 3D Viewport Controls & Device Adaptation */
.canvas-viewport-card.orbit-active {
    border-color: #00acc1;
    box-shadow: 0 0 0 2px rgba(0, 172, 193, 0.35);
}

/* Desktop HUD Control Toolbar */
.canvas-hud-toolbar {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 10;
    display: flex;
    align-items: center;
    gap: 6px;
}
.hud-control-group {
    display: inline-flex;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(0, 0, 0, 0.12);
    border-radius: 6px;
    padding: 2px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}
.hud-btn {
    background: transparent;
    border: none;
    border-radius: 4px;
    padding: 5px 9px;
    font-size: 0.74rem;
    font-weight: 700;
    color: #4b5563;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    transition: all 0.15s ease;
    line-height: 1;
}
.hud-btn:hover {
    background: #f3f4f6;
    color: var(--primary-blue);
}
.hud-btn:focus-visible {
    outline: 2px solid var(--primary-blue);
    outline-offset: 1px;
}
.hud-btn.active {
    background: var(--primary-blue);
    color: #ffffff;
    box-shadow: 0 1px 3px rgba(13, 71, 161, 0.3);
}
.hud-icon-btn {
    padding: 5px 6px;
}
.hud-spin-btn.active {
    background: #e65100;
    color: #ffffff;
}

/* Touch / Mobile Ergonomic Control Bar */
.canvas-touch-controls {
    position: absolute;
    top: 8px;
    left: 8px;
    right: 8px;
    z-index: 10;
    pointer-events: none;
}
.touch-chips-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 6px;
    pointer-events: auto;
}
.touch-chip {
    min-height: 38px;
    min-width: 42px;
    padding: 6px 11px;
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1.5px solid #d1d5db;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 700;
    color: #374151;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    transition: all 0.15s ease;
    touch-action: manipulation;
}
.touch-chip:active {
    transform: scale(0.96);
}
.touch-chip.active {
    background: var(--primary-blue);
    color: #ffffff;
    border-color: var(--primary-blue);
    box-shadow: 0 2px 6px rgba(13, 71, 161, 0.35);
}
.touch-zoom-chip {
    font-size: 1rem;
    padding: 4px 10px;
}
.touch-orbit-toggle {
    background: #f0fdf4;
    border-color: #86efac;
    color: #166534;
}
.touch-orbit-toggle.active {
    background: #00838f;
    color: #ffffff;
    border-color: #00838f;
    box-shadow: 0 2px 6px rgba(0, 131, 143, 0.35);
}

/* Device Scoping: Desktop Mouse vs Mobile Touch */
.canvas-viewport-card.device-mouse .canvas-touch-controls {
    display: none;
}
.canvas-viewport-card.device-mouse .canvas-hud-toolbar {
    display: flex;
}
.canvas-viewport-card.device-touch .canvas-hud-toolbar {
    display: none;
}
.canvas-viewport-card.device-touch .canvas-touch-controls {
    display: block;
}

/* Fallback media query if JS has not run yet */
@media (pointer: coarse), (max-width: 768px) {
    .canvas-hud-toolbar {
        display: none;
    }
    .canvas-touch-controls {
        display: block;
    }
}
@media (pointer: fine) and (min-width: 769px) {
    .canvas-touch-controls {
        display: none;
    }
    .canvas-hud-toolbar {
        display: flex;
    }
}

.canvas-dimensions-overlay {
    position: absolute;
    bottom: 10px;
    left: 14px;
    background: rgba(255, 255, 255, 0.9);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--primary-blue);
    border: 1px solid rgba(0,0,0,0.06);
}

.canvas-pdf-cta {
    position: absolute;
    bottom: 10px;
    right: 14px;
    text-align: right;
}
.btn-email-pdf {
    background: #2e7d32;
    color: #ffffff;
    font-weight: 700;
    font-size: 0.8rem;
    padding: 6px 12px;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: background 0.15s, opacity 0.15s, border-color 0.15s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.btn-email-pdf:hover {
    background: #1b5e20;
}
.btn-email-pdf.active {
    background: #2e7d32;
    color: #ffffff;
}
.btn-email-pdf.inactive {
    background: #eceff1;
    color: #546e7a;
    border: 1px solid #cfd8dc;
}
.btn-email-pdf.inactive:hover {
    background: #cfd8dc;
    color: #263238;
}
.pdf-icon-indicator {
    font-size: 0.9rem;
    font-weight: 900;
}
.pdf-help-link {
    display: block;
    font-size: 0.72rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* Config & Order Summary Section */
.builder-summary-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
}

.input-numbers-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
    flex-wrap: wrap;
}
.input-label {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-primary);
}
.input-numbers-field {
    background: #fffde7;
    border: 2px solid #fbc02d;
    font-size: 1.3rem;
    font-weight: 800;
    padding: 6px 12px;
    border-radius: 6px;
    letter-spacing: 2px;
    max-width: 200px;
}

.config-readout-row {
    display: flex;
    gap: 16px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 14px;
    flex-wrap: wrap;
}
.config-readout-row strong {
    color: var(--text-primary);
}

.accessory-options-box {
    background: #fdfbe8;
    border: 1px solid #fae69e;
    border-radius: 6px;
    padding: 12px;
    margin-bottom: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 0.85rem;
}
.accessory-item {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.action-checkout-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid #eaeef2;
    padding-top: 14px;
}
.live-price-display {
    font-size: 1.4rem;
    font-weight: 900;
    color: var(--primary-blue);
}
.action-buttons-group {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}
.btn-add-to-cart {
    background: var(--accent-cyan);
    color: #ffffff;
    font-size: 0.95rem;
    font-weight: 800;
    padding: 10px 18px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    transition: background 0.15s, transform 0.1s;
    box-shadow: 0 3px 8px rgba(0, 188, 212, 0.35);
}
.btn-add-to-cart:hover {
    background: var(--accent-cyan-dark);
    transform: translateY(-1px);
}
.btn-proceed-checkout {
    background: #2e7d32;
    color: #ffffff;
    font-size: 0.95rem;
    font-weight: 800;
    padding: 10px 20px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    transition: background 0.15s, transform 0.1s;
    box-shadow: 0 3px 8px rgba(46, 125, 50, 0.35);
}
.btn-proceed-checkout:hover {
    background: #1b5e20;
    transform: translateY(-1px);
}

/* Finish Swatches */
.finish-swatches-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
    gap: 10px;
    padding: 14px;
}
.swatch-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    text-align: center;
    gap: 4px;
}
.swatch-circle {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 2px solid #ffffff;
    box-shadow: 0 2px 6px rgba(0,0,0,0.18);
    transition: transform 0.15s, border-color 0.15s;
}
.swatch-item:hover .swatch-circle {
    transform: scale(1.08);
}
.swatch-item.selected .swatch-circle {
    border: 3px solid var(--accent-red);
    box-shadow: 0 0 0 2px var(--accent-gold);
}
.swatch-label {
    font-size: 0.68rem;
    font-weight: 600;
    color: var(--text-secondary);
    line-height: 1.1;
}

/* Column 3: Select Size & Dynamic Finish Info (180px x 450px) */
.builder-col-size {
    width: 180px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    box-sizing: border-box;
}

.builder-col-size .builder-box:first-child {
    height: 560px;
    display: flex;
    flex-direction: column;
}

.size-list-container {
    flex: 1;
    min-height: 220px;
    padding: 8px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    overflow-y: auto;
}
.size-item-pill {
    padding: 8px 12px;
    font-size: 0.85rem;
    font-weight: 700;
    text-align: center;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    cursor: pointer;
    background: #ffffff;
    transition: background 0.15s;
}
.size-item-pill:hover {
    background: #f5f5f5;
}
.size-item-pill.selected {
    background: var(--accent-gold);
    border: 2px solid var(--accent-red);
    color: #212121;
}
.size-item-pill.disabled {
    opacity: 0.35;
    background: #f0f2f5;
    color: #88929b;
    border-color: #d1d5db;
    cursor: not-allowed;
    pointer-events: none;
    text-decoration: line-through;
}

/* Added to Cart Floating Toast */
.cart-toast {
    position: fixed;
    bottom: 28px;
    right: 28px;
    background: #1b5e20;
    color: #ffffff;
    padding: 14px 22px;
    border-radius: 8px;
    font-weight: 700;
    font-size: 0.95rem;
    box-shadow: 0 4px 16px rgba(0,0,0,0.3);
    z-index: 99999;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.25s ease, transform 0.25s ease;
    pointer-events: none;
    max-width: 360px;
    line-height: 1.4;
}
.cart-toast.show {
    opacity: 1;
    transform: translateY(0);
}

/* 3D Isometric Dimensional Profile Box */
.size-diagram-box {
    padding: 10px 12px;
    border-top: 1px solid #eaeef2;
    background: #fbfcfd;
}

.size-diagram-header {
    text-align: center;
    margin-bottom: 6px;
}

.size-diagram-title {
    font-size: 0.72rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--primary-blue);
}

.size-diagram-stage {
    position: relative;
    width: 100%;
    height: 160px;
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background-image: 
        linear-gradient(to right, rgba(0, 0, 0, 0.035) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(0, 0, 0, 0.035) 1px, transparent 1px);
    background-size: 14px 14px;
}

.size-diagram-canvas-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.size-diagram-canvas-container canvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
}

.size-diagram-ruler-svg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10;
}

/* Precision Dimension Callouts */
.dimension-callout {
    position: absolute;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2.5px 7px;
    border-radius: 4px;
    font-size: 0.68rem;
    font-weight: 800;
    box-shadow: 0 1px 4px rgba(0,0,0,0.12);
    pointer-events: none;
    z-index: 5;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    letter-spacing: 0.3px;
}

.dim-height {
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: #fff0f0;
    border: 1px solid #fca5a5;
    color: #b91c1c;
}

.dim-height .dim-axis {
    background: #ef4444;
    color: #ffffff;
    padding: 0.5px 3.5px;
    border-radius: 2px;
    font-size: 0.62rem;
}

.dim-depth {
    left: 8px;
    bottom: 8px;
    background: #f0f7ff;
    border: 1px solid #93c5fd;
    color: #1d4ed8;
}

.dim-depth .dim-axis {
    background: #2563eb;
    color: #ffffff;
    padding: 0.5px 3.5px;
    border-radius: 2px;
    font-size: 0.62rem;
}

.size-diagram-caption {
    font-size: 0.68rem;
    color: #64748b;
    text-align: center;
    margin-top: 6px;
    line-height: 1.3;
}
.size-diagram-caption strong {
    color: var(--text-primary);
}

.finish-description-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 14px;
}
.finish-desc-title {
    font-size: 0.85rem;
    font-weight: 800;
    color: var(--primary-blue);
    text-transform: uppercase;
    margin-bottom: 6px;
}
.finish-desc-body {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.35;
}

/* ==========================================================================
   Trust Badges Banner
   ========================================================================== */

.value-props-banner {
    background: #ffffff;
    border-top: 2px solid var(--accent-red);
    border-bottom: 2px solid var(--accent-red);
    padding: 14px 20px;
    margin: 30px auto;
}
.value-props-list {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 16px;
    list-style: none;
}
.value-prop-item {
    font-style: italic;
    font-weight: 800;
    color: var(--accent-red);
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* ==========================================================================
   Installation & FAQ Accordions
   ========================================================================== */

.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}
.video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.faq-accordion-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.faq-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow: hidden;
}
.faq-question {
    padding: 14px 18px;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--primary-blue);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #fafbfc;
}
.faq-question:hover {
    background: #f1f8ff;
}
.faq-icon-toggle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    transition: transform 0.2s;
}
.faq-card.open .faq-icon-toggle {
    transform: rotate(45deg);
    color: var(--accent-red);
}
.faq-answer {
    display: none;
    padding: 14px 18px;
    font-size: 0.9rem;
    color: var(--text-primary);
    border-top: 1px solid #eaeef2;
    background: #ffffff;
}
.faq-card.open .faq-answer {
    display: block;
}

/* ==========================================================================
   Slide-out Cart Drawer
   ========================================================================== */

.cart-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 2000;
    display: none;
}
.cart-overlay.active {
    display: block;
}

.cart-drawer {
    position: fixed;
    top: 0;
    right: -420px;
    width: 400px;
    max-width: 90vw;
    height: 100%;
    background: #ffffff;
    z-index: 2001;
    box-shadow: -4px 0 16px rgba(0,0,0,0.15);
    transition: right 0.25s ease-in-out;
    display: flex;
    flex-direction: column;
}
.cart-drawer.active {
    right: 0;
}
.cart-drawer-header {
    padding: 16px 20px;
    background: var(--primary-blue);
    color: #ffffff;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.cart-drawer-title {
    font-size: 1.15rem;
    font-weight: 800;
}
.cart-drawer-close {
    background: none;
    border: none;
    color: #fff;
    font-size: 1.4rem;
    cursor: pointer;
}
.cart-drawer-body {
    flex: 1;
    overflow-y: auto;
    padding: 16px 20px;
}
.cart-drawer-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
    background: #fafbfc;
}
.cart-drawer-checkout-btn {
    display: block;
    width: 100%;
    background: var(--accent-cyan);
    color: #fff;
    text-align: center;
    padding: 12px;
    font-size: 1.05rem;
    font-weight: 800;
    border-radius: 6px;
    text-transform: uppercase;
}
.cart-drawer-checkout-btn:hover {
    background: var(--accent-cyan-dark);
    text-decoration: none;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
    background: var(--primary-blue-dark);
    color: #ffffff;
    text-align: center;
    padding: 18px;
    font-size: 0.85rem;
    margin-top: 40px;
}

/* ==========================================================================
   Responsive Adaptations & Mobile Optimization
   ========================================================================== */

/* Intermediate / Tablet Viewports (769px to 1060px) */
@media (max-width: 1060px) and (min-width: 769px) {
    .builder-grid {
        grid-template-columns: minmax(0, 300fr) minmax(0, 540fr) minmax(0, 180fr);
        max-width: 100%;
        gap: 8px;
        padding: 0 8px;
    }
    .builder-col-style,
    .builder-col-center,
    .builder-col-size,
    .canvas-viewport-card,
    .builder-summary-card,
    .builder-col-center .builder-box:last-child {
        width: 100%;
        max-width: 100%;
    }
    .canvas-container {
        height: 280px;
    }
}

/* Mobile Stack (<= 768px) - Triggers instantly on DevTools resize without requiring refresh */
@media (max-width: 768px) {
    .orientation-rotate-notice {
        display: flex;
    }
    .builder-grid {
        display: flex;
        flex-direction: column;
        align-items: center;
        width: 100%;
        gap: 16px;
    }
    .builder-col-style,
    .builder-col-center,
    .builder-col-size,
    .canvas-viewport-card,
    .builder-summary-card,
    .builder-col-center .builder-box:last-child {
        width: 100%;
        max-width: 540px;
    }
    .builder-col-style .builder-box:first-child,
    .builder-col-size .builder-box:first-child {
        height: auto;
        max-height: 380px;
    }
    .canvas-container {
        height: 260px;
    }
    .welcome-hero-card {
        grid-template-columns: 1fr;
    }
    .masthead-inner {
        flex-direction: column;
        align-items: flex-start;
    }
    .masthead-tagline {
        justify-content: flex-start;
    }
    .brand-tagline-img {
        height: 42px;
    }
}

/* Mobile Landscape Baseline (Height <= 500px and Width >= 560px) */
@media (max-height: 500px) and (min-width: 560px) {
    .orientation-rotate-notice {
        display: none !important;
    }
    .site-masthead {
        padding: 6px 16px;
    }
    .brand-name {
        font-size: 1.2rem;
    }
    .brand-contact {
        display: none;
    }
    .brand-tagline-img {
        height: 38px;
    }
    .sticky-nav-wrapper {
        box-shadow: 0 1px 4px rgba(0,0,0,0.08);
    }
    .nav-item a {
        padding: 8px 12px;
        font-size: 0.85rem;
    }
    .builder-grid {
        display: grid;
        grid-template-columns: 240px 1fr 160px;
        gap: 8px;
        max-width: 100%;
    }
    .builder-col-style,
    .builder-col-center,
    .builder-col-size,
    .canvas-viewport-card,
    .builder-summary-card,
    .builder-col-center .builder-box:last-child {
        width: 100%;
        max-width: 100%;
    }
    .canvas-container {
        height: 220px;
    }
    .builder-col-style .builder-box:first-child {
        height: 280px;
    }
    .builder-col-size .builder-box:first-child {
        height: 280px;
    }
}