/* ==========================================================================
   HERITAGE CUSTOM DOOR DESIGNER - STYLESHEET
   Aesthetics: Rich premium dark theme, Glassmorphism, Micro-animations,
   fluid responsive layouts, and print-optimised sheets.
   Adheres to UK English spelling and contains no em dashes.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. DESIGN SYSTEM & CUSTOM PROPERTIES
   -------------------------------------------------------------------------- */
:root {
    /* Primary Colors */
    --color-bg-base: #f8fafc;
    --color-bg-surface: #ffffff;
    --color-bg-panel: rgba(255, 255, 255, 0.75);
    --color-bg-active: linear-gradient(135deg, #3b82f6, #2563eb);
    
    /* Text Colors */
    --color-text-main: #0f172a;
    --color-text-muted: #475569;
    --color-text-dim: #94a3b8;
    --color-text-inverse: #ffffff;

    /* Border Colors */
    --color-border-subtle: rgba(15, 23, 42, 0.08);
    --color-border-glow: rgba(37, 99, 235, 0.15);
    --color-border-active: #2563eb;

    /* Accents & Statuses */
    --color-accent-blue: #2563eb;
    --color-accent-indigo: #4f46e5;
    --color-accent-gold: #d97706;
    --color-danger: #dc2626;
    --color-danger-bg: rgba(220, 38, 38, 0.06);
    --color-success: #059669;
    --color-success-bg: rgba(5, 150, 105, 0.08);

    /* Fonts & Typography */
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

    /* Shadows & Blurs */
    --shadow-premium: 0 10px 30px rgba(15, 23, 42, 0.05), 0 1px 3px rgba(15, 23, 42, 0.02);
    --shadow-glow: 0 0 15px rgba(37, 99, 235, 0.12);
    --blur-glass: blur(20px);
    --radius-lg: 16px;
    --radius-md: 10px;
    --radius-sm: 6px;

    /* Interface Animations */
    --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --------------------------------------------------------------------------
   2. CORE BASICS & LAYOUT
   -------------------------------------------------------------------------- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    outline: none;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg-base);
    color: var(--color-text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Scrollbars */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Header */
.app-header {
    background: rgba(10, 12, 16, 0.8);
    backdrop-filter: var(--blur-glass);
    border-bottom: 1px solid var(--color-border-subtle);
    padding: 1rem 2rem;
    position: relative;
    z-index: 100;
}

.header-container {
    max-width: 1600px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-badge {
    font-family: var(--font-heading);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.8rem;
    background: var(--color-bg-active);
    color: var(--color-text-inverse);
    padding: 0.25rem 0.6rem;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-glow);
}

.logo-area h1 {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.4rem;
    letter-spacing: -0.02em;
}

.header-actions {
    display: flex;
    gap: 0.75rem;
}

/* App Grid Split-Screen Layout */
.app-layout {
    display: grid;
    grid-template-columns: 480px 1fr;
    height: calc(100vh - 73px);
    min-height: 680px;
    overflow: hidden;
    max-width: 1920px;
    width: 100%;
    margin: 0 auto;
}

/* --------------------------------------------------------------------------
   3. LEFT PANEL: STEP CONFIGURATION
   -------------------------------------------------------------------------- */
.config-panel {
    background: var(--color-bg-surface);
    border-right: 1px solid var(--color-border-subtle);
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    position: relative;
    z-index: 10;
}

/* Step Navigation Tab Bar */
.steps-nav {
    display: flex;
    overflow-x: auto;
    border-bottom: 1px solid var(--color-border-subtle);
    background: rgba(0, 0, 0, 0.15);
    scrollbar-width: none; /* Firefox */
}

.steps-nav::-webkit-scrollbar {
    display: none; /* Safari & Chrome */
}

.step-tab {
    flex: 1;
    min-width: 80px;
    padding: 0.9rem 0.5rem;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--color-text-muted);
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    transition: var(--transition-fast);
    text-align: center;
    white-space: nowrap;
}

.step-num {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    transition: var(--transition-fast);
}

.step-tab:hover {
    color: var(--color-text-main);
    background: rgba(255, 255, 255, 0.02);
}

.step-tab:hover .step-num {
    background: rgba(255, 255, 255, 0.15);
    color: var(--color-text-main);
}

.step-tab.active {
    color: var(--color-accent-blue);
    border-bottom-color: var(--color-accent-blue);
    background: rgba(37, 99, 235, 0.03);
}

.step-tab.active .step-num {
    background: var(--color-accent-blue);
    color: var(--color-text-inverse);
    box-shadow: 0 0 10px rgba(37, 99, 235, 0.4);
}

/* Step Panes Content Area */
.steps-content {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem 1.75rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    position: relative;
    scroll-behavior: smooth;
}

/* Custom Scrollbar for Steps Content */
.steps-content::-webkit-scrollbar {
    width: 6px;
}

.steps-content::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
}

.steps-content::-webkit-scrollbar-thumb {
    background: var(--color-accent-blue);
    border-radius: 3px;
}

.steps-content::-webkit-scrollbar-thumb:hover {
    background: #3b82f6;
}

.step-pane {
    display: none;
    animation: fadeIn var(--transition-smooth);
}

.step-pane.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.step-pane h2 {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 0.35rem;
}

.step-intro {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    margin-bottom: 1rem;
    line-height: 1.45;
}

/* Sub-Navigation Quick Pills */
.sub-nav-pills {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
    background: rgba(0, 0, 0, 0.25);
    padding: 0.3rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-subtle);
}

.sub-pill {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    padding: 0.45rem 0.6rem;
    background: transparent;
    border: none;
    border-radius: calc(var(--radius-md) - 2px);
    color: var(--color-text-muted);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.sub-pill:hover {
    color: var(--color-text-main);
    background: rgba(255, 255, 255, 0.05);
}

.sub-pill.active {
    background: var(--color-accent-blue);
    color: var(--color-text-inverse);
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

/* Floating Scroll Hint Indicator */
.scroll-hint-indicator {
    position: absolute;
    bottom: 70px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(8px);
    border: 1px solid var(--color-accent-blue);
    color: var(--color-text-main);
    padding: 0.35rem 0.85rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4);
    z-index: 20;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
    animation: bounceHint 2s infinite;
}

.scroll-hint-indicator.hidden {
    opacity: 0;
    transform: translate(-50%, 10px);
}

@keyframes bounceHint {
    0%, 20%, 50%, 80%, 100% { transform: translate(-50%, 0); }
    40% { transform: translate(-50%, -5px); }
    60% { transform: translate(-50%, -2px); }
}

/* Locked Panel Navigation Footer */
.panel-nav-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 1.25rem;
    background: var(--color-bg-surface);
    border-top: 1px solid var(--color-border-subtle);
    z-index: 15;
    gap: 0.75rem;
}

.step-progress-indicator {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text-muted);
}

.btn-step-nav {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.55rem 1.1rem;
    font-size: 0.85rem;
    font-weight: 600;
}

/* Config Groups */
.config-group {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-lg);
    padding: 1rem 1.25rem;
    margin-bottom: 1.25rem;
}

.config-group h3 {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-text-main);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Bottom Navigation Footer */
.panel-nav-footer {
    border-top: 1px solid var(--color-border-subtle);
    padding: 1.25rem 2rem;
    display: flex;
    gap: 1rem;
    background: rgba(10, 12, 16, 0.4);
    backdrop-filter: var(--blur-glass);
}

/* --------------------------------------------------------------------------
   4. BUTTONS & INTERACTION ELEMENTS
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-md);
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    border: 1px solid transparent;
}

.btn-primary {
    background: var(--color-bg-active);
    color: var(--color-text-inverse);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    filter: brightness(1.1);
    transform: translateY(-1px);
    box-shadow: 0 0 25px rgba(37, 99, 235, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--color-border-subtle);
    color: var(--color-text-main);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.15);
}

.btn-danger-outline {
    background: transparent;
    border-color: rgba(239, 68, 68, 0.3);
    color: var(--color-danger);
}

.btn-danger-outline:hover {
    background: var(--color-danger-bg);
    border-color: var(--color-danger);
}

.btn-secondary-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border-subtle);
    color: var(--color-text-main);
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: var(--transition-fast);
}

.btn-secondary-sm:hover {
    background: rgba(255, 255, 255, 0.1);
}

.btn-danger-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    background: var(--color-danger-bg);
    border: 1px solid var(--color-danger);
    color: var(--color-danger);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-danger-sm:hover {
    background: rgba(239, 68, 68, 0.2);
}

.btn-block {
    width: 100%;
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.cursor-pointer {
    cursor: pointer;
}

.flex-1 {
    flex: 1;
}

/* Toggle Switch Control */
.toggle-control {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    width: 100%;
}

.toggle-control input {
    display: none;
}

.toggle-slider {
    width: 44px;
    height: 24px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    position: relative;
    transition: var(--transition-smooth);
    border: 1px solid var(--color-border-subtle);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #ffffff;
    top: 2px;
    left: 2px;
    transition: var(--transition-smooth);
}

.toggle-control input:checked + .toggle-slider {
    background: var(--color-accent-blue);
    border-color: var(--color-accent-blue);
}

.toggle-control input:checked + .toggle-slider::before {
    transform: translateX(20px);
}

.toggle-text {
    font-size: 0.9rem;
    color: var(--color-text-main);
}

/* Small toggle for match options */
.toggle-control-sm {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    cursor: pointer;
}
.toggle-control-sm input { display: none; }
.toggle-control-sm .toggle-slider {
    width: 32px;
    height: 18px;
    border-radius: 9px;
}
.toggle-control-sm .toggle-slider::before {
    width: 12px;
    height: 12px;
    top: 2px;
    left: 2px;
}
.toggle-control-sm input:checked + .toggle-slider::before {
    transform: translateX(14px);
}
.toggle-control-sm .toggle-text {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   5. GRID CONFIGURATION CARDS
   -------------------------------------------------------------------------- */
.grid-options {
    display: grid;
    gap: 0.75rem;
}

.frame-grid {
    grid-template-columns: repeat(2, 1fr);
}

.style-grid {
    grid-template-columns: repeat(2, 1fr);
}

.glass-grid {
    grid-template-columns: repeat(2, 1fr);
}

.handle-grid {
    grid-template-columns: repeat(2, 1fr);
}

.card-option {
    position: relative;
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-md);
    padding: 1rem;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.01);
    transition: var(--transition-fast);
    overflow: hidden;
}

.card-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.card-option:hover {
    border-color: rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.03);
    transform: translateY(-2px);
}

.card-option.active {
    border-color: var(--color-border-active);
    background: rgba(37, 99, 235, 0.04);
    box-shadow: 0 0 15px rgba(37, 99, 235, 0.1);
}

.card-option.active::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 0 24px 24px 0;
    border-color: transparent var(--color-accent-blue) transparent transparent;
}

.option-content {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.option-title {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-text-main);
}

.option-sub {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* Thumbnails for frame types */
.frame-thumb {
    height: 60px;
    border: 1.5px solid var(--color-text-dim);
    border-radius: var(--radius-sm);
    position: relative;
    background: rgba(0, 0, 0, 0.3);
}

.single-thumb::before {
    content: '';
    position: absolute;
    top: 5px; bottom: 5px; left: 10px; right: 10px;
    border: 1px solid var(--color-accent-blue);
}

.left-thumb::before {
    content: '';
    position: absolute;
    top: 5px; bottom: 5px; right: 8px; left: 24px;
    border: 1px solid var(--color-accent-blue);
}
.left-thumb::after {
    content: '';
    position: absolute;
    top: 5px; bottom: 5px; left: 8px; width: 12px;
    border: 1px solid var(--color-text-dim);
}

.right-thumb::before {
    content: '';
    position: absolute;
    top: 5px; bottom: 5px; left: 8px; right: 24px;
    border: 1px solid var(--color-accent-blue);
}
.right-thumb::after {
    content: '';
    position: absolute;
    top: 5px; bottom: 5px; right: 8px; width: 12px;
    border: 1px solid var(--color-text-dim);
}

.double-thumb::before {
    content: '';
    position: absolute;
    top: 5px; bottom: 5px; left: 18px; right: 18px;
    border: 1px solid var(--color-accent-blue);
}
.double-thumb::after {
    content: '';
    position: absolute;
    top: 5px; bottom: 5px;
    left: 6px; width: 8px;
    border: 1px solid var(--color-text-dim);
}
.double-thumb::after, .double-thumb-right {
    content: '';
    position: absolute;
    top: 5px; bottom: 5px;
    box-sizing: border-box;
}
.double-thumb::after {
    border-right: 1px solid var(--color-text-dim);
    border-left: 1px solid var(--color-text-dim);
    left: 5px; width: 8px;
}
.double-thumb-side-r {
    position: absolute;
    top: 5px; bottom: 5px; right: 5px; width: 8px;
    border-left: 1px solid var(--color-text-dim);
    border-right: 1px solid var(--color-text-dim);
}

/* Door style category selector tabs */
.style-category-tabs {
    display: flex;
    border-bottom: 1px solid var(--color-border-subtle);
    margin-bottom: 1.25rem;
}

.cat-tab {
    flex: 1;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--color-text-muted);
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.6rem 0.25rem;
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: center;
}

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

.cat-tab.active {
    color: var(--color-text-main);
    border-bottom-color: var(--color-accent-blue);
    font-weight: 600;
}

.style-cat-content {
    display: none;
}

.style-cat-content.active {
    display: block;
}

/* Style miniature thumbnails */
.style-preview-icon {
    height: 75px;
    border-radius: var(--radius-sm);
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    display: flex;
    justify-content: center;
    padding-top: 6px;
}

.style-preview-icon::before {
    content: '';
    width: 26px;
    height: 62px;
    background: #1e293b;
    border: 1px solid #475569;
    border-radius: 1px;
}

/* SVG miniature details inside option cards */
.style-preview-icon[data-style="ludlow"]::before {
    background: radial-gradient(circle at 7px 10px, transparent 4px, #1e293b 4px),
                radial-gradient(circle at 19px 10px, transparent 4px, #1e293b 4px);
    background-size: 100% 100%;
}
.style-preview-icon[data-style="tenby"]::before {
    background: linear-gradient(to bottom, #1e293b 45%, #0f172a 45%, #0f172a 50%, #1e293b 50%);
}
.style-preview-icon[data-style="harlech"]::before {
    background: linear-gradient(to right, #1e293b 30%, transparent 30%, transparent 45%, #1e293b 45%, #1e293b 55%, transparent 55%, transparent 70%, #1e293b 70%);
}
.style-preview-icon[data-style="belgrave"]::before {
    background: radial-gradient(ellipse at 13px 12px, transparent 6px, #1e293b 6px);
}
.style-preview-icon[data-style="milano"]::before {
    background-image: repeating-linear-gradient(0deg, #334155, #334155 1px, #1e293b 1px, #1e293b 10px);
}
.style-preview-icon[data-style="brescia"]::before {
    background: linear-gradient(to right, #1e293b 20%, transparent 20%, transparent 35%, #1e293b 35%);
}
.style-preview-icon[data-style="monza"]::before {
    background: linear-gradient(to right, #1e293b 40%, transparent 40%, transparent 60%, #1e293b 60%);
}
.style-preview-icon[data-style="flint"]::before {
    background-image: repeating-linear-gradient(90deg, #1e293b, #1e293b 4px, #334155 4px, #334155 5px);
}
.style-preview-icon[data-style="windsor"]::before {
    background-image: repeating-linear-gradient(90deg, #1e293b, #1e293b 4px, #0f172a 4px, #0f172a 5px);
}

.style-name {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    margin-top: 0.25rem;
}

.style-desc {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    line-height: 1.3;
}

/* Glass styling thumbnails */
.glass-thumb {
    height: 50px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
}
.glass-clear { background: linear-gradient(135deg, #38bdf8 0%, #0284c7 100%); }
.glass-frosted { background: linear-gradient(135deg, #e2e8f0 0%, #94a3b8 100%); filter: opacity(0.8); }
.glass-murano { background: linear-gradient(135deg, #f43f5e 0%, #3b82f6 50%, #eab308 100%); }
.glass-matrix {
    background: #e2e8f0;
    background-image: linear-gradient(90deg, rgba(0,0,0,0.15) 1px, transparent 1px),
                      linear-gradient(0deg, rgba(0,0,0,0.15) 1px, transparent 1px);
    background-size: 8px 8px;
}
.glass-reflections {
    background: linear-gradient(135deg, #cbd5e1 0%, #64748b 100%);
    box-shadow: inset 0 0 10px rgba(255,255,255,0.6);
}

.glass-name {
    font-weight: 600;
    font-size: 0.9rem;
}

.privacy-badge {
    align-self: flex-start;
    font-size: 0.7rem;
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
    font-weight: 500;
}
.privacy-badge.level-1 { background: rgba(59, 130, 246, 0.15); color: #60a5fa; }
.privacy-badge.level-3 { background: rgba(245, 158, 11, 0.15); color: #fbbf24; }
.privacy-badge.level-4 { background: rgba(245, 158, 11, 0.15); color: #fbbf24; }
.privacy-badge.level-5 { background: rgba(16, 185, 129, 0.15); color: #34d399; }

/* Hardware icons */
.handle-icon {
    height: 40px;
    position: relative;
    display: inline-flex;
    justify-content: center;
}
.handle-lever-icon::before {
    content: '';
    position: absolute;
    width: 6px; height: 16px;
    background: #94a3b8;
    border-radius: 2px;
    top: 10px;
}
.handle-lever-icon::after {
    content: '';
    position: absolute;
    width: 18px; height: 5px;
    background: #cbd5e1;
    border-radius: 1px;
    top: 12px; left: calc(50% + 2px);
}
.handle-pull-icon::before {
    content: '';
    position: absolute;
    width: 4px;
    background: #94a3b8;
    border-radius: 2px;
}
.handle-pull-icon.short::before { height: 18px; top: 11px; }
.handle-pull-icon.medium::before { height: 28px; top: 6px; }
.handle-pull-icon.long::before { height: 38px; top: 1px; }

.handle-ring-icon::before {
    content: '';
    position: absolute;
    width: 18px; height: 18px;
    border: 3px solid #64748b;
    border-radius: 50%;
    top: 11px;
}

/* Horizontal pill style selection */
.horizontal-options {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.pill-option {
    position: relative;
    border: 1px solid var(--color-border-subtle);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-muted);
    background: rgba(255, 255, 255, 0.01);
    transition: var(--transition-fast);
}

.pill-option input {
    position: absolute;
    opacity: 0;
    width: 0; height: 0;
}

.pill-option:hover {
    border-color: rgba(255, 255, 255, 0.15);
    color: var(--color-text-main);
}

.pill-option.active {
    border-color: var(--color-accent-blue);
    background: rgba(37, 99, 235, 0.08);
    color: var(--color-text-main);
}

/* --------------------------------------------------------------------------
   6. COLOUR SWATCHES & FINISH SELECTORS
   -------------------------------------------------------------------------- */
.colour-swatches {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0.6rem;
    margin-bottom: 0.75rem;
    transition: var(--transition-fast);
}

.colour-swatches.disabled {
    opacity: 0.35;
    pointer-events: none;
}

.swatch-btn {
    aspect-ratio: 1;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    position: relative;
    transition: var(--transition-fast);
    background-size: cover;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.3);
}

.swatch-btn::before {
    content: '';
    position: absolute;
    top: -4px; bottom: -4px; left: -4px; right: -4px;
    border: 1.5px solid transparent;
    border-radius: 50%;
    transition: var(--transition-fast);
}

.swatch-btn:hover::before {
    border-color: rgba(255, 255, 255, 0.3);
}

.swatch-btn.active::before {
    border-color: var(--color-accent-blue);
    box-shadow: 0 0 8px rgba(37, 99, 235, 0.6);
}

.swatch-btn.active {
    transform: scale(1.05);
}

.colour-meta {
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
    padding-left: 0.25rem;
}

.colour-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-text-main);
}

.colour-type {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.swatch-anthracite { background-color: #374151; }
.swatch-agate { background-color: #b1b3a6; }
.swatch-pebble { background-color: #b4b3a8; }
.swatch-chartwell { background-color: #92a893; }
.swatch-duckegg { background-color: #7eb0b5; }
.swatch-blue { background-color: #1e3a8a; }
.swatch-red { background-color: #851c1c; }
.swatch-green { background-color: #14532d; }
.swatch-cream { background-color: #f3ebd7; border: 1px solid rgba(255, 255, 255, 0.15); }
.swatch-slate { background-color: #484e53; }
.swatch-plum { background-color: #4c243b; }
.swatch-black { background-color: #111827; }
.swatch-white { background-color: #f9fafb; border: 1px solid rgba(255, 255, 255, 0.15); }
.swatch-oak {
    background-color: #b45309;
    background-image: repeating-linear-gradient(45deg, #92400e 0px, #b45309 4px, #d97706 8px);
}
.swatch-rosewood {
    background-color: #451a03;
    background-image: repeating-linear-gradient(45deg, #3f1a04 0px, #451a03 3px, #78350f 7px);
}

/* Custom Colour Picker Controls */
.custom-colour-picker-row {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    padding: 0.75rem 0.9rem;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    margin-top: 0.5rem;
}

.color-picker-input {
    -webkit-appearance: none;
    border: none;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    cursor: pointer;
    background: transparent;
}

.color-picker-input::-webkit-color-swatch-wrapper {
    padding: 0;
}

.color-picker-input::-webkit-color-swatch {
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.4);
}

.custom-color-info {
    display: flex;
    flex-direction: column;
}

.custom-color-label {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--color-accent-blue);
}

.custom-color-sub {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   8c. MAGNIFIER LENS & TRANSFORM HANDLES
   -------------------------------------------------------------------------- */
.magnifier-lens {
    position: absolute;
    width: 160px;
    height: 160px;
    border-radius: 50%;
    border: 3px solid var(--color-accent-blue);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.6), inset 0 0 15px rgba(255, 255, 255, 0.3);
    overflow: hidden;
    pointer-events: none;
    z-index: 50;
    background: #090b0e;
}

.magnifier-content {
    width: 100%;
    height: 100%;
    transform-origin: center center;
}

/* Transform handles for house photo alignment */
.guide-box {
    position: relative;
}

.handle {
    position: absolute;
    width: 14px;
    height: 14px;
    background: var(--color-accent-blue);
    border: 2px solid #ffffff;
    border-radius: 50%;
    z-index: 30;
    cursor: nwse-resize;
    box-shadow: 0 0 8px rgba(0,0,0,0.5);
    transition: transform var(--transition-fast);
}

.handle:hover {
    transform: scale(1.3);
}

.handle-tl { top: -7px; left: -7px; }
.handle-tr { top: -7px; right: -7px; cursor: nesw-resize; }
.handle-bl { bottom: -7px; left: -7px; cursor: nesw-resize; }
.handle-br { bottom: -7px; right: -7px; }
.handle-move {
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 24px; height: 24px;
    background: rgba(37, 99, 235, 0.9);
    cursor: move;
    border-radius: 4px;
}
.handle-move::before {
    content: '+';
    color: #ffffff;
    font-weight: 800;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
}

/* Metal Finish Selector Buttons */
.finish-selector {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.6rem;
}

.finish-btn {
    border: 1px solid var(--color-border-subtle);
    background: rgba(255, 255, 255, 0.01);
    padding: 0.6rem 0.75rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-muted);
    transition: var(--transition-fast);
}

.finish-btn input { display: none; }

.finish-color {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.4);
}

.chrome-swatch { background: linear-gradient(135deg, #e2e8f0 0%, #94a3b8 100%); }
.gold-swatch { background: linear-gradient(135deg, #fef08a 0%, #ca8a04 100%); }
.steel-swatch { background: linear-gradient(135deg, #cbd5e1 30%, #64748b 70%); }
.black-swatch { background: #1f2937; }

.finish-btn:hover {
    border-color: rgba(255, 255, 255, 0.15);
    color: var(--color-text-main);
}

.finish-btn.active {
    border-color: var(--color-accent-blue);
    background: rgba(37, 99, 235, 0.06);
    color: var(--color-text-main);
}

/* --------------------------------------------------------------------------
   7. INPUTS, ALERTS & FORMS
   -------------------------------------------------------------------------- */
.dimensions-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.input-range-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.input-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.input-header label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-muted);
}

.val-display {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--color-accent-blue);
    font-size: 0.95rem;
}

.range-bounds {
    font-size: 0.7rem;
    color: var(--color-text-dim);
    text-align: right;
}

/* Custom range input slider design */
input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 5px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--color-accent-blue);
    cursor: pointer;
    box-shadow: 0 0 10px rgba(37, 99, 235, 0.5);
    transition: var(--transition-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

/* Information Alert Message */
.info-alert {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.9rem 1.1rem;
    border-radius: var(--radius-md);
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: #fbbf24;
    font-size: 0.85rem;
    line-height: 1.4;
}

.info-alert svg {
    flex-shrink: 0;
}

/* Quote Submission Form */
.quote-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-row {
    display: flex;
    gap: 1rem;
}

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

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

.form-group input, .form-group textarea {
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-sm);
    padding: 0.65rem 0.8rem;
    color: var(--color-text-main);
    font-family: var(--font-body);
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.form-group input:focus, .form-group textarea:focus {
    border-color: var(--color-accent-blue);
    box-shadow: 0 0 8px rgba(37, 99, 235, 0.2);
    background: rgba(0, 0, 0, 0.35);
}

.form-group textarea {
    resize: vertical;
}

/* --------------------------------------------------------------------------
   8. RIGHT PANEL: LIVE VISUALISER VIEWPORT
   -------------------------------------------------------------------------- */
.preview-panel {
    background: #141720;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    height: 100%;
}

.bg-dark-glass {
    background: rgba(18, 22, 31, 0.7);
    backdrop-filter: var(--blur-glass);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-md);
}

/* Controls Top overlay */
.preview-controls-top {
    position: absolute;
    top: 1.5rem;
    left: 1.5rem;
    right: 1.5rem;
    display: flex;
    justify-content: space-between;
    z-index: 20;
    pointer-events: none;
}

.preview-controls-top > * {
    pointer-events: auto;
}

.toggle-group {
    display: flex;
    padding: 2.5px;
    box-shadow: var(--shadow-premium);
}

.toggle-btn {
    background: transparent;
    border: none;
    padding: 0.45rem 1rem;
    border-radius: 6px;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.toggle-btn.active {
    background: rgba(255, 255, 255, 0.08);
    color: var(--color-text-main);
    box-shadow: inset 0 1px 1px rgba(255,255,255,0.1);
}

/* Controls Bottom overlay */
.preview-controls-bottom {
    position: absolute;
    bottom: 1.5rem;
    left: 1.5rem;
    right: 1.5rem;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    z-index: 20;
    box-shadow: var(--shadow-premium);
}

.control-row {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.control-label {
    font-family: var(--font-heading);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    min-width: 80px;
}

.bg-selector-buttons {
    display: flex;
    gap: 0.4rem;
}

.bg-select-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border-subtle);
    padding: 0.35rem 0.85rem;
    border-radius: 6px;
    color: var(--color-text-muted);
    font-family: var(--font-heading);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.bg-select-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-text-main);
}

.bg-select-btn.active {
    background: var(--color-accent-blue);
    border-color: var(--color-accent-blue);
    color: var(--color-text-inverse);
}

.upload-row {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding-top: 0.6rem;
}

/* Visualiser Viewport Window */
.visualiser-viewport {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: #090b0e;
}

/* Viewport Background Image Layer */
.viewport-bg {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-size: cover;
    background-position: center;
    transition: background-image 0.5s ease-in-out;
    opacity: 0.85;
}

/* SVG Placement container inside house aperture */
.svg-positioner {
    position: relative;
    width: 240px;
    height: 520px;
    z-index: 10;
    transform-origin: center center;
    transition: width 0.4s var(--transition-smooth), height 0.4s var(--transition-smooth), transform 0.4s var(--transition-smooth);
    filter: drop-shadow(0 15px 35px rgba(0,0,0,0.6));
}

.svg-positioner svg {
    width: 100%;
    height: 100%;
    display: block;
}

/* --------------------------------------------------------------------------
   9. SLIDE-OUT DRAWER: SAVED DESIGNS
   -------------------------------------------------------------------------- */
.history-drawer {
    position: fixed;
    top: 0;
    right: -420px;
    width: 400px;
    height: 100vh;
    background: var(--color-bg-surface);
    border-left: 1px solid var(--color-border-subtle);
    box-shadow: var(--shadow-premium);
    z-index: 150;
    display: flex;
    flex-direction: column;
    transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.history-drawer.open {
    right: 0;
}

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

.drawer-header h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
}

.btn-close {
    background: transparent;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    display: inline-flex;
    padding: 0.25rem;
    transition: var(--transition-fast);
    border-radius: 50%;
}

.btn-close:hover {
    color: var(--color-text-main);
    background: rgba(255, 255, 255, 0.05);
}

.drawer-body {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.drawer-backdrop {
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 140;
    display: none;
}

.drawer-backdrop.open {
    display: block;
}

/* History cards */
.history-card {
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.01);
    padding: 1rem;
    display: flex;
    gap: 1rem;
    transition: var(--transition-fast);
}

.history-card:hover {
    border-color: rgba(255,255,255,0.15);
    background: rgba(255,255,255,0.02);
}

.hist-preview {
    width: 60px;
    height: 120px;
    background: #0f1218;
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hist-preview svg {
    width: 100%;
    height: 100%;
}

.hist-details {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.hist-title {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text-main);
    margin-bottom: 0.15rem;
}

.hist-meta {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    line-height: 1.35;
}

.hist-date {
    font-size: 0.7rem;
    color: var(--color-text-dim);
    margin-top: 0.25rem;
}

.hist-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.empty-state {
    text-align: center;
    padding: 4rem 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    color: var(--color-text-dim);
}

.empty-state svg {
    color: var(--color-text-dim);
    opacity: 0.5;
}

.empty-state .sub {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    max-width: 250px;
}

/* --------------------------------------------------------------------------
   10. MODALS & SUBMISSION SCREENS
   -------------------------------------------------------------------------- */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    background: rgba(10, 12, 16, 0.8);
    backdrop-filter: blur(8px);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
}

.modal-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

.modal-card {
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 480px;
    padding: 2.25rem;
    box-shadow: var(--shadow-premium);
    transform: scale(0.95);
    transition: transform var(--transition-smooth);
}

.modal-overlay.open .modal-card {
    transform: scale(1);
}

.text-center {
    text-align: center;
}

.success-icon-badge {
    width: 60px;
    height: 60px;
    background: var(--color-success-bg);
    border: 2px solid var(--color-success);
    color: var(--color-success);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
}

.modal-card h2 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.modal-card p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.5;
    margin-bottom: 1.25rem;
}

.modal-spec-box {
    background: rgba(255,255,255,0.02);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-md);
    padding: 1rem;
    text-align: left;
    margin-bottom: 1.25rem;
}

.modal-spec-box h4 {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-accent-blue);
    margin-bottom: 0.5rem;
}

.modal-spec-box ul {
    list-style: none;
    font-size: 0.8rem;
    color: var(--color-text-main);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.4rem;
}

.modal-spec-box li {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.reference-number {
    font-size: 0.8rem;
    color: var(--color-text-dim);
}

.reference-number strong {
    color: var(--color-text-main);
}

/* --------------------------------------------------------------------------
   11. SUMMARY SPECIFICATION CARDS (STEP 6)
   -------------------------------------------------------------------------- */
.summary-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    margin-bottom: 1.5rem;
}

.summary-card h3 {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    padding-bottom: 0.5rem;
}

.summary-table {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin-bottom: 1.25rem;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
}

.sum-key {
    color: var(--color-text-muted);
}

.sum-val {
    font-weight: 500;
    color: var(--color-text-main);
    text-align: right;
}

.summary-price {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding-top: 0.75rem;
    margin-bottom: 0.25rem;
}

.summary-price span:first-child {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
}

.price-val {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--color-accent-blue);
}

.price-note {
    font-size: 0.7rem;
    color: var(--color-text-dim);
    display: block;
    text-align: right;
}

.quote-actions-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

/* --------------------------------------------------------------------------
   11b. ITEMISED PRICE BREAKDOWN & SHARE TOAST
   -------------------------------------------------------------------------- */
.header-logo-icon {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.2), rgba(30, 58, 138, 0.4));
    border: 1px solid rgba(59, 130, 246, 0.4);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent-blue);
    box-shadow: 0 0 12px rgba(37, 99, 235, 0.25);
}

.breakdown-toggle-wrapper {
    margin: 0.75rem 0 0.5rem 0;
    padding-top: 0.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.btn-text-link {
    background: transparent;
    border: none;
    color: var(--color-accent-blue);
    font-family: var(--font-heading);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0;
    transition: var(--transition-fast);
}

.btn-text-link:hover {
    color: #60a5fa;
    text-decoration: underline;
}

.btn-text-link svg {
    transition: transform var(--transition-fast);
}

.itemised-breakdown {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-md);
    padding: 0.75rem 0.9rem;
    margin-bottom: 0.75rem;
    animation: fadeIn 0.3s ease;
}

.breakdown-table {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.breakdown-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.78rem;
}

.bd-key {
    color: var(--color-text-muted);
}

.bd-val {
    font-weight: 600;
    color: var(--color-text-main);
}

/* Toast notification popup */
.toast-notification {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: #0f172a;
    border: 1px solid var(--color-accent-blue);
    border-radius: var(--radius-md);
    padding: 0.75rem 1.25rem;
    color: #ffffff;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 0 15px rgba(37, 99, 235, 0.3);
    z-index: 300;
    opacity: 0;
    pointer-events: none;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.4s ease;
}

.toast-notification.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
    pointer-events: auto;
}

.toast-notification svg {
    color: var(--color-success);
    flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   12. MOBILE RESPONSIVENESS & TABS
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
    .app-layout {
        grid-template-columns: 1fr;
        grid-template-rows: 400px 1fr;
        height: auto;
        overflow: visible;
    }
    
    .config-panel {
        height: auto;
        border-right: none;
        border-top: 1px solid var(--color-border-subtle);
    }

    .preview-panel {
        height: 400px;
    }

    .visualiser-viewport {
        height: 100%;
    }

    .svg-positioner {
        width: 160px;
        height: 350px;
    }

    .steps-content {
        padding: 1.5rem;
    }

    .photo-placement-panel {
        bottom: 7.5rem;
    }
}

@media (max-width: 768px) {
    .placement-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }
    .photo-placement-panel {
        position: relative;
        bottom: auto;
        left: auto;
        right: auto;
        margin: 1.5rem;
    }
    .form-row {
        flex-direction: column;
        gap: 1rem;
    }
}


/* --------------------------------------------------------------------------
   12b. LIGHT THEME OVERRIDES & COMPATIBILITY
   -------------------------------------------------------------------------- */
::-webkit-scrollbar-thumb {
    background: rgba(15, 23, 42, 0.15);
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(15, 23, 42, 0.3);
}

.app-header {
    background: rgba(255, 255, 255, 0.85);
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.05);
}

.steps-nav {
    background: rgba(15, 23, 42, 0.02);
}

.step-tab:hover {
    background: rgba(15, 23, 42, 0.015);
}

.step-tab:hover .step-num {
    background: rgba(15, 23, 42, 0.08);
}

.step-num {
    background: rgba(15, 23, 42, 0.04);
}

.config-group {
    background: rgba(15, 23, 42, 0.01);
}

.panel-nav-footer {
    background: rgba(255, 255, 255, 0.6);
}

.btn-secondary {
    background: rgba(15, 23, 42, 0.03);
}

.btn-secondary:hover {
    background: rgba(15, 23, 42, 0.06);
}

.btn-secondary-sm {
    background: rgba(15, 23, 42, 0.03);
}

.btn-secondary-sm:hover {
    background: rgba(15, 23, 42, 0.06);
}

.toggle-slider {
    background: rgba(15, 23, 42, 0.08);
}

.card-option {
    background: rgba(15, 23, 42, 0.005);
}

.card-option:hover {
    border-color: rgba(15, 23, 42, 0.15);
    background: rgba(15, 23, 42, 0.02);
}

.card-option.active {
    background: rgba(37, 99, 235, 0.06);
}

.frame-thumb {
    background: rgba(15, 23, 42, 0.04);
    border-color: #cbd5e1;
}

.style-preview-icon {
    background: rgba(15, 23, 42, 0.04);
    border-color: rgba(15, 23, 42, 0.08);
}

.style-preview-icon::before {
    background: #e2e8f0;
    border-color: #cbd5e1;
}

.pill-option {
    background: rgba(15, 23, 42, 0.01);
}

.pill-option:hover {
    border-color: rgba(15, 23, 42, 0.15);
}

.finish-btn {
    background: rgba(15, 23, 42, 0.01);
}

.finish-btn:hover {
    border-color: rgba(15, 23, 42, 0.15);
}

input[type="range"] {
    background: rgba(15, 23, 42, 0.08);
}

.form-group input, .form-group textarea {
    background: rgba(15, 23, 42, 0.02);
    border-color: rgba(15, 23, 42, 0.08);
    color: var(--color-text-main);
}

.form-group input:focus, .form-group textarea:focus {
    background: #ffffff;
}

.preview-panel {
    background: #f1f5f9;
}

.bg-dark-glass {
    background: rgba(255, 255, 255, 0.75);
    box-shadow: 0 4px 20px rgba(15, 23, 42, 0.05);
}

.toggle-btn.active {
    background: rgba(15, 23, 42, 0.05);
}

.bg-select-btn {
    background: rgba(15, 23, 42, 0.02);
}

.bg-select-btn:hover {
    background: rgba(15, 23, 42, 0.05);
}

.visualiser-viewport {
    background: #cbd5e1;
}

.custom-photo-layer {
    background: #cbd5e1;
}

.help-tooltip {
    background: rgba(15, 23, 42, 0.06);
}

.history-card {
    background: rgba(15, 23, 42, 0.01);
}

.history-card:hover {
    background: rgba(15, 23, 42, 0.02);
}

.hist-preview {
    background: #e2e8f0;
}

.modal-spec-box {
    background: rgba(15, 23, 42, 0.015);
}

.summary-card {
    background: rgba(15, 23, 42, 0.01);
}

.summary-card h3 {
    border-bottom-color: rgba(15, 23, 42, 0.08);
}


.header-logo {
    height: 38px;
    width: auto;
    object-fit: contain;
}


/* --------------------------------------------------------------------------
   13. PRINT-OPTIMISED STYLES (PDF Specification Page)
   -------------------------------------------------------------------------- */
@media print {
    /* Hide non-print controls */
    .app-header, 
    .steps-nav, 
    .panel-nav-footer, 
    .preview-controls-top, 
    .preview-controls-bottom, 
    .photo-placement-panel, 
    .quote-actions-row, 
    .config-group,
    .history-drawer,
    .drawer-backdrop,
    .modal-overlay {
        display: none !important;
    }

    body {
        background: #ffffff !important;
        color: #000000 !important;
        height: auto !important;
        overflow: visible !important;
        font-size: 11pt;
    }

    .app-layout {
        display: block !important;
        width: 100% !important;
        max-width: 100% !important;
        height: auto !important;
        overflow: visible !important;
        background: #ffffff !important;
    }

    .config-panel {
        background: #ffffff !important;
        border: none !important;
        width: 100% !important;
        height: auto !important;
        overflow: visible !important;
    }

    .steps-content {
        display: block !important;
        padding: 0 !important;
        overflow: visible !important;
    }

    .step-pane {
        display: none !important;
    }

    /* Force Step 6 summary to show in print style */
    .step-pane#pane-6 {
        display: block !important;
    }

    .summary-card {
        background: #f8fafc !important;
        border: 1px solid #cbd5e1 !important;
        color: #0f172a !important;
        box-shadow: none !important;
        margin-top: 2rem;
        page-break-inside: avoid;
    }

    .summary-card h3 {
        border-color: #cbd5e1 !important;
    }

    .sum-key {
        color: #475569 !important;
    }

    .sum-val {
        color: #0f172a !important;
    }

    .summary-price {
        border-color: #cbd5e1 !important;
    }

    .price-val {
        color: #1e3a8a !important;
    }

    /* Print Preview Panel style */
    .preview-panel {
        display: block !important;
        background: #ffffff !important;
        width: 100% !important;
        height: 480px !important;
        position: relative !important;
        page-break-after: avoid;
    }

    .visualiser-viewport {
        background: #ffffff !important;
        border: 1px solid #e2e8f0 !important;
        height: 100% !important;
    }

    .viewport-bg {
        display: none !important;
    }

    .svg-positioner {
        width: 200px !important;
        height: 430px !important;
        filter: none !important;
        margin: 0 auto !important;
    }

    .night-ambient-overlay, .night-glow-lantern {
        display: none !important;
    }

    /* PDF Header decoration */
    .config-panel::before {
        content: "FRONT DOOR DESIGNER - CUSTOM SPECIFICATION SHEET";
        display: block;
        font-family: var(--font-heading);
        font-size: 16pt;
        font-weight: 700;
        text-align: center;
        border-bottom: 2px solid #0f172a;
        padding-bottom: 10px;
        margin-bottom: 20px;
        color: #0f172a;
    }

    .config-panel::after {
        content: "Specification summary generated by Front Door Designer (yourfrontdoordesigner.co.uk). Please submit your quote request to confirm installation details.";
        display: block;
        font-size: 9pt;
        color: #64748b;
        text-align: center;
        margin-top: 30px;
        border-top: 1px solid #cbd5e1;
        padding-top: 10px;
    }
}

/* --------------------------------------------------------------------------
   10. LEGAL & E-E-A-T STYLES
   -------------------------------------------------------------------------- */
.legal-page {
    background: #f8fafc;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.legal-content {
    flex: 1;
    padding: 3rem 1.5rem;
}

.container-narrow {
    max-width: 860px;
    margin: 0 auto;
    background: #ffffff;
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    box-shadow: var(--shadow-premium);
}

.container-narrow h1 {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--color-text-main);
    margin-bottom: 0.25rem;
}

.effective-date {
    color: var(--color-text-dim);
    font-size: 0.85rem;
    margin-bottom: 2rem;
}

.lead-text {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin-bottom: 2rem;
}

.legal-content section {
    margin-bottom: 2rem;
}

.legal-content h2 {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--color-text-main);
    margin-bottom: 0.75rem;
}

.legal-content p {
    color: var(--color-text-muted);
    line-height: 1.65;
    margin-bottom: 1rem;
}

.legal-content ul {
    margin: 1rem 0 1.5rem 1.5rem;
    color: var(--color-text-muted);
}

.legal-content li {
    margin-bottom: 0.5rem;
    line-height: 1.5;
}

.logo-link img {
    display: block;
    max-height: 42px;
    width: auto;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

@media (max-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

.contact-info-card {
    background: #f1f5f9;
    padding: 1.5rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-subtle);
}

.contact-info-card h3 {
    font-family: var(--font-heading);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.contact-form .form-group {
    margin-bottom: 1.25rem;
}

.contact-form label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.35rem;

}

.contact-form input, .contact-form textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
}

/* --------------------------------------------------------------------------
   11. SEO CONTENT & FAQ ACCORDION LAYER
   -------------------------------------------------------------------------- */
.seo-content-section {
    background: #ffffff;
    border-top: 1px solid var(--color-border-subtle);
    padding: 4rem 1.5rem;
}

.seo-container {
    max-width: 1200px;
    margin: 0 auto;
}

.seo-intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 4rem;
}

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

.seo-col h2 {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--color-text-main);
}

.seo-col p {
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.faq-wrapper {
    margin-top: 3rem;
}

.faq-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 2rem;
}

.faq-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-md);
    background: #f8fafc;
    overflow: hidden;
    transition: var(--transition-fast);
}

.faq-item.active {
    border-color: var(--color-accent-blue);
    background: #ffffff;
    box-shadow: var(--shadow-premium);
}

.faq-question {
    width: 100%;
    padding: 1.25rem 1.5rem;
    background: transparent;
    border: none;
    text-align: left;
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--color-text-main);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-icon {
    transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1), padding 0.35s ease;
    padding: 0 1.5rem;
    color: var(--color-text-muted);
    line-height: 1.65;
}

.faq-item.active .faq-answer {
    max-height: 300px;
    padding: 0 1.5rem 1.25rem 1.5rem;
}

/* --------------------------------------------------------------------------
   12. COOKIE NOTIFICATION BANNER
   -------------------------------------------------------------------------- */
.cookie-banner {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    max-width: 420px;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: var(--blur-glass);
    color: #ffffff;
    padding: 1.25rem 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-premium);
    border: 1px solid rgba(255, 255, 255, 0.15);
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: transform 0.4s ease, opacity 0.4s ease;
}

.cookie-banner.hidden {
    transform: translateY(150%);
    opacity: 0;
    pointer-events: none;
}

.cookie-text p {
    font-size: 0.85rem;
    color: #cbd5e1;
    line-height: 1.5;
}

.cookie-text a {
    color: #60a5fa;
    text-decoration: underline;
}

.cookie-actions {
    display: flex;
    gap: 0.75rem;
}

.btn-cookie-accept {
    background: var(--color-accent-blue);
    color: #ffffff;
    border: none;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
}

.btn-cookie-decline {
    background: transparent;
    color: #94a3b8;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    cursor: pointer;
}

/* --------------------------------------------------------------------------
   13. GLOBAL FOOTER
   -------------------------------------------------------------------------- */
.app-footer {
    background: #0f172a;
    color: #94a3b8;
    padding: 2.5rem 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 0.85rem;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    color: #cbd5e1;
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: #60a5fa;
}