/* QR Code Studio - Professional High-Density Design System */

:root {
    --theme-accent: #00f0ff;
    --theme-accent-glow: rgba(0, 240, 255, 0.4);
    --theme-accent-dim: rgba(0, 240, 255, 0.12);
    --theme-pink: #ff0055;
    --theme-pink-glow: rgba(255, 0, 85, 0.4);
    --theme-green: #00ff88;
    --theme-amber: #ffb703;
    --max-width: 1200px;
    --footer-theme: var(--theme-accent);
}

/* ==========================================================================
   Header & Brand Accents
   ========================================================================== */
.nav-brand .brand-badge {
    border-color: rgba(0, 240, 255, 0.3);
    color: var(--theme-accent);
}

.tool-icon-wrapper {
    border-color: rgba(0, 240, 255, 0.3);
    color: var(--theme-accent);
    box-shadow: 0 0 16px rgba(0, 240, 255, 0.15);
}

/* ==========================================================================
   Style Presets Strip (Top Interactive Thumbnails)
   ========================================================================== */
.presets-panel {
    margin-bottom: 20px;
    padding: 16px 18px;
    background: #090b10;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
}

.presets-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.presets-title-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--theme-accent);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.8px;
}

.presets-sub {
    font-size: 0.74rem;
    color: var(--theme-text-muted);
}

.presets-carousel-container {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
}

.preset-nav-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(14, 16, 24, 0.92);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--theme-text);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    backdrop-filter: blur(8px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.preset-nav-arrow:hover {
    background: rgba(0, 240, 255, 0.15);
    border-color: var(--theme-accent);
    color: var(--theme-accent);
    box-shadow: 0 0 14px rgba(0, 240, 255, 0.4);
    transform: translateY(-50%) scale(1.1);
}

.preset-nav-prev {
    left: -8px;
}

.preset-nav-next {
    right: -8px;
}

.presets-track {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    padding: 6px 14px 10px;
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.15) transparent;
    user-select: none;
    cursor: grab;
    width: 100%;
}

.presets-track.is-dragging {
    cursor: grabbing;
    scroll-behavior: auto;
}

.presets-track::-webkit-scrollbar {
    height: 5px;
}

.presets-track::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.18);
    border-radius: 3px;
}

/* Individual Preset Thumbnail Card */
.preset-card {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 7px 12px 7px 8px;
    background: rgba(18, 20, 28, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    user-select: none;
    text-align: left;
}

.preset-card:hover {
    border-color: rgba(0, 240, 255, 0.45);
    transform: translateY(-2px);
    background: rgba(26, 30, 44, 0.95);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
}

.preset-card.active {
    border-color: var(--theme-accent);
    background: rgba(0, 240, 255, 0.08);
    box-shadow: 0 0 16px rgba(0, 240, 255, 0.28);
}

.preset-swatch {
    width: 44px;
    height: 44px;
    border-radius: 8px;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 3px 8px rgba(0,0,0,0.5);
    border: 1px solid rgba(255, 255, 255, 0.14);
    flex-shrink: 0;
}

/* Realistic Mini SVG Preview inside Swatch */
.preset-swatch svg {
    width: 100%;
    height: 100%;
    display: block;
}

.preset-card-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.preset-name {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--theme-text);
    white-space: nowrap;
}

.preset-card.active .preset-name {
    color: var(--theme-accent);
}

.preset-tag {
    font-size: 0.68rem;
    color: var(--theme-text-muted);
    white-space: nowrap;
}

/* ==========================================================================
   Studio Split Layout
   ========================================================================== */
.editor-grid {
    display: grid;
    grid-template-columns: 1.25fr 1fr;
    gap: 24px;
    align-items: start;
    width: 100%;
}

/* ==========================================================================
   Workbench Column (Left) & Tabs
   ========================================================================== */
.workbench-column {
    background: #0b0d14;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 14px;
    padding: 20px;
    min-width: 0;
    max-width: 100%;
    overflow-x: hidden;
}

.workbench-tabs {
    display: flex;
    gap: 8px;
    background: rgba(0, 0, 0, 0.35);
    padding: 5px;
    border-radius: 10px;
    margin-bottom: 20px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.tab-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    padding: 9px 12px;
    background: transparent;
    border: none;
    border-radius: 7px;
    font-family: var(--theme-font-body);
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--theme-text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.tab-btn:hover {
    color: var(--theme-text);
    background: rgba(255, 255, 255, 0.04);
}

.tab-btn.active {
    background: var(--theme-accent);
    color: #050d14;
    box-shadow: 0 2px 10px rgba(0, 240, 255, 0.3);
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
    animation: fadeInTab 0.25s ease-out;
}

@keyframes fadeInTab {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Payload Chips Grid */
.payload-chips-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-bottom: 16px;
}

.payload-chip {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 6px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    color: var(--theme-text-muted);
    font-family: var(--theme-font-body);
    font-size: 0.76rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
    white-space: nowrap;
}

.payload-chip:hover {
    border-color: rgba(0, 240, 255, 0.3);
    color: var(--theme-text);
}

.payload-chip.active {
    background: rgba(0, 240, 255, 0.12);
    border-color: var(--theme-accent);
    color: var(--theme-accent);
}

/* Quick Prefix Chips for URLs */
.quick-prefixes-row {
    display: flex;
    gap: 6px;
    margin-top: 6px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}

.prefix-chip {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 6px;
    padding: 3px 8px;
    font-size: 0.7rem;
    color: var(--theme-text-muted);
    cursor: pointer;
    transition: all 0.15s;
}

.prefix-chip:hover {
    color: var(--theme-accent);
    border-color: var(--theme-accent);
}

/* Form Helper Utilities */
.form-row-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.form-row-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

/* Payload Scannability Card */
.scannability-card {
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 10px;
    padding: 12px 14px;
    margin-top: 18px;
}

.scannability-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}

.scannability-title {
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--theme-text-muted);
    letter-spacing: 0.6px;
}

.scannability-pill {
    font-size: 0.68rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 12px;
    background: rgba(0, 255, 136, 0.12);
    color: var(--theme-green);
    border: 1px solid rgba(0, 255, 136, 0.25);
}

.scannability-bar-track {
    width: 100%;
    height: 5px;
    background: rgba(255, 255, 255, 0.07);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 8px;
}

.scannability-bar-fill {
    height: 100%;
    background: var(--theme-green);
    border-radius: 3px;
    transition: width 0.3s ease, background 0.3s ease;
}

.scannability-footer {
    display: flex;
    justify-content: space-between;
    font-size: 0.72rem;
    color: var(--theme-text-muted);
}

/* ==========================================================================
   Tab 2: Style & Shapes Components
   ========================================================================== */

/* Choose Preset Section & Carousel */
.presets-section {
    margin-bottom: 8px;
}

.presets-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

.presets-title-wrap {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.btn-toggle-all-presets {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(0, 240, 255, 0.08);
    border: 1px solid rgba(0, 240, 255, 0.25);
    color: var(--theme-accent);
    padding: 4px 10px;
    border-radius: 6px;
    font-family: var(--theme-font-body);
    font-size: 0.72rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-toggle-all-presets:hover {
    background: rgba(0, 240, 255, 0.2);
    border-color: var(--theme-accent);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
}

.btn-toggle-all-presets.active svg {
    transform: rotate(180deg);
}

.presets-carousel-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.carousel-arrow {
    width: 28px;
    height: 48px;
    background: rgba(18, 20, 30, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 8px;
    color: var(--theme-text);
    font-size: 1.2rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.18s ease;
    flex-shrink: 0;
    user-select: none;
    z-index: 3;
}

.carousel-arrow:hover {
    background: rgba(0, 240, 255, 0.18);
    border-color: var(--theme-accent);
    color: var(--theme-accent);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
}

.carousel-arrow:active {
    transform: scale(0.92);
}

.presets-carousel-track {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    scroll-behavior: smooth;
    scrollbar-width: none;
    padding: 6px 2px 10px 2px;
    flex: 1;
}

.presets-carousel-track::-webkit-scrollbar {
    display: none;
}

/* Preset Cards (Carousel & Grid) */
.preset-card {
    flex: 0 0 136px;
    min-width: 136px;
    background: rgba(18, 20, 30, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 10px 8px 10px 8px;
    cursor: pointer;
    transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    user-select: none;
}

.preset-card:hover {
    transform: translateY(-2px);
    border-color: rgba(0, 240, 255, 0.4);
    background: rgba(0, 240, 255, 0.04);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
}

.preset-card.active {
    border-color: var(--theme-accent);
    background: rgba(0, 240, 255, 0.12);
    box-shadow: 0 0 16px rgba(0, 240, 255, 0.35);
}

.preset-card.active::after {
    content: '✓';
    position: absolute;
    top: 6px;
    right: 6px;
    width: 16px;
    height: 16px;
    background: var(--theme-accent);
    color: #050d14;
    border-radius: 50%;
    font-size: 0.65rem;
    font-weight: 900;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 8px var(--theme-accent);
}

.preset-card-qr {
    width: 110px;
    height: 110px;
    background: #000000;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 8px;
    position: relative;
}

.preset-card-qr canvas {
    width: 100% !important;
    height: 100% !important;
    display: block;
}

.preset-card-name {
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--theme-text);
    text-align: center;
    margin-bottom: 6px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    width: 100%;
    letter-spacing: 0.2px;
}

.preset-tags-row {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    justify-content: center;
    align-items: center;
    width: 100%;
}

.preset-tag-chip {
    font-size: 0.58rem;
    font-weight: 700;
    padding: 1px 5px;
    border-radius: 4px;
    background: rgba(0, 255, 136, 0.09);
    color: var(--theme-green);
    border: 1px solid rgba(0, 255, 136, 0.22);
    white-space: nowrap;
    letter-spacing: 0.2px;
}

/* Expandable Full Grid of Presets */
.presets-all-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-top: 10px;
    max-height: 420px;
    overflow-y: auto;
    padding: 6px 2px;
    animation: toastSlideUp 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.presets-all-grid .preset-card {
    flex: unset;
    min-width: 0;
    width: 100%;
}

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

/* Divider between presets and custom styling */
.or-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 18px 0 16px 0;
    position: relative;
    text-align: center;
}

.or-divider::before,
.or-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: rgba(255, 255, 255, 0.08);
}

.or-divider span {
    padding: 0 12px;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--theme-text-muted);
    letter-spacing: 0.6px;
    text-transform: uppercase;
}

.shape-chips-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.shape-chip {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 9px 10px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    color: var(--theme-text);
    font-family: var(--theme-font-body);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
}

.shape-chip:hover {
    border-color: rgba(0, 240, 255, 0.3);
}

.shape-chip.active {
    background: rgba(0, 240, 255, 0.1);
    border-color: var(--theme-accent);
    color: var(--theme-accent);
}

.shape-icon {
    width: 14px;
    height: 14px;
    background: currentColor;
    display: inline-block;
}

.icon-rounded { border-radius: 4px; }
.icon-dots { border-radius: 50%; }
.icon-classy { transform: rotate(45deg); border-radius: 2px; }
.icon-classy-rounded { border-radius: 6px 0 6px 0; }
.icon-square { border-radius: 0; }
.icon-extra-rounded { border-radius: 7px; }

/* Color Mode Switcher */
.color-mode-switch {
    display: flex;
    gap: 6px;
    background: rgba(0, 0, 0, 0.3);
    padding: 4px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.color-mode-btn {
    flex: 1;
    padding: 7px 8px;
    background: transparent;
    border: none;
    border-radius: 6px;
    font-family: var(--theme-font-body);
    font-size: 0.74rem;
    font-weight: 600;
    color: var(--theme-text-muted);
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}

.color-mode-btn:hover {
    color: var(--theme-text);
}

.color-mode-btn.active {
    background: rgba(255, 255, 255, 0.08);
    color: var(--theme-accent);
    box-shadow: 0 1px 4px rgba(0,0,0,0.3);
}

/* Specs / Settings Box */
.custom-specs-box {
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 10px;
    padding: 14px;
}

/* Color Picker Combo */
.color-picker-combo {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: 10px;
    padding: 6px 12px 6px 8px;
    transition: all 0.2s ease;
}

.color-picker-combo:hover, .color-picker-combo:focus-within {
    border-color: rgba(0, 240, 255, 0.35);
    background: rgba(255, 255, 255, 0.06);
}

.color-input {
    width: 44px;
    height: 38px;
    border: none;
    border-radius: 8px;
    background: transparent;
    cursor: pointer;
    padding: 0;
    flex-shrink: 0;
}

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

.color-input::-webkit-color-swatch {
    border: 2px solid rgba(255, 255, 255, 0.25);
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.color-picker-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex: 1;
    min-width: 0;
    gap: 8px;
}

.color-picker-title {
    font-size: 0.74rem;
    font-weight: 600;
    color: var(--theme-text-muted);
    white-space: nowrap;
}

.hex-input {
    width: 78px;
    flex-shrink: 0;
    border: 1px solid rgba(255, 255, 255, 0.1) !important;
    background: rgba(0, 0, 0, 0.4) !important;
    padding: 4px 6px !important;
    border-radius: 6px;
    font-family: monospace;
    font-size: 0.76rem;
    color: var(--theme-text) !important;
    text-transform: uppercase;
    text-align: center;
}

.hex-input:focus {
    border-color: var(--theme-accent) !important;
    outline: none;
}

/* Quick Color Swatches Row */
.quick-swatches-row {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 8px;
    flex-wrap: wrap;
}

.swatch-btn {
    width: 22px;
    height: 22px;
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    cursor: pointer;
    padding: 0;
    transition: transform 0.15s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.15s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.swatch-btn:hover {
    transform: scale(1.25);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
    z-index: 2;
}

.swatch-btn:active {
    transform: scale(0.95);
}

.slider-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}

.slider-val-badge {
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--theme-accent);
}

.form-slider {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

.form-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--theme-accent);
    cursor: pointer;
    box-shadow: 0 0 8px var(--theme-accent-glow);
}

/* Custom Checkbox */
.checkbox-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.82rem;
    color: var(--theme-text);
    user-select: none;
}

.checkbox-label input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.checkbox-custom {
    width: 16px;
    height: 16px;
    border-radius: 4px;
    border: 1px solid rgba(255, 255, 255, 0.25);
    background: rgba(255, 255, 255, 0.05);
    position: relative;
    transition: all 0.15s;
    flex-shrink: 0;
}

.checkbox-label input:checked + .checkbox-custom {
    background: var(--theme-accent);
    border-color: var(--theme-accent);
}

.checkbox-label input:checked + .checkbox-custom::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 5px;
    width: 4px;
    height: 8px;
    border: solid #050d14;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.bg-section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}

.mini-check {
    font-size: 0.74rem;
    color: var(--theme-text-muted);
}

/* ==========================================================================
   Tab 3: Logo & Frame Components
   ========================================================================== */
.logo-dropzone {
    border: 2px dashed rgba(255, 255, 255, 0.14);
    border-radius: 10px;
    padding: 16px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    background: rgba(255, 255, 255, 0.02);
}

.logo-dropzone:hover, .logo-dropzone.dragover {
    border-color: var(--theme-accent);
    background: rgba(0, 240, 255, 0.05);
}

.dropzone-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--theme-text-muted);
    font-size: 0.8rem;
}

.dropzone-empty svg {
    color: var(--theme-accent);
}

.dropzone-preview {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
}

.dropzone-preview img {
    width: 44px;
    height: 44px;
    object-fit: contain;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.1);
    padding: 2px;
}

.logo-file-info {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
}

.logo-file-info span {
    font-size: 0.8rem;
    font-weight: 600;
    max-width: 140px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.btn-clear-logo {
    background: rgba(255, 0, 85, 0.15);
    border: 1px solid rgba(255, 0, 85, 0.3);
    color: #ff4d6d;
    padding: 2px 8px;
    border-radius: 5px;
    font-size: 0.72rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.15s;
}

.btn-clear-logo:hover {
    background: rgba(255, 0, 85, 0.3);
    color: #fff;
}

/* Quick Built-in Brand Icons Grid */
.popular-icons-grid, .shortcuts-symbols-grid, .quick-icons-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 8px;
}

@media (max-width: 600px) {
    .popular-icons-grid, .shortcuts-symbols-grid, .quick-icons-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.brand-icon-btn, .quick-icon-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 44px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 9px;
    cursor: pointer;
    transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
    padding: 6px;
    position: relative;
}

.brand-icon-btn svg, .quick-icon-btn svg {
    width: 20px;
    height: 20px;
    transition: transform 0.15s ease;
}

.brand-icon-btn:hover, .quick-icon-btn:hover {
    border-color: var(--theme-accent);
    background: rgba(0, 240, 255, 0.08);
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.brand-icon-btn.active, .quick-icon-btn.active {
    border-color: var(--theme-accent);
    background: rgba(0, 240, 255, 0.16);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.35);
}

/* Frame Style Chips Grid */
.frame-chips-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.frame-chip {
    padding: 9px 8px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    color: var(--theme-text-muted);
    font-family: var(--theme-font-body);
    font-size: 0.76rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
    text-align: center;
}

.frame-chip:hover {
    border-color: rgba(0, 240, 255, 0.3);
    color: var(--theme-text);
}

.frame-chip.active {
    background: rgba(0, 240, 255, 0.1);
    border-color: var(--theme-accent);
    color: var(--theme-accent);
}

/* ==========================================================================
   Right: Studio Live Preview Column
   ========================================================================== */
.preview-column {
    background: #0b0d14;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 14px;
    padding: 20px;
    position: sticky;
    top: 20px;
}

.preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.preview-resolution-badge {
    font-size: 0.68rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--theme-accent);
    border: 1px solid rgba(0, 240, 255, 0.2);
}

/* Live Stage Display */
.preview-stage {
    background: #06070a;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 360px;
    position: relative;
    overflow: hidden;
}

/* Stage Checkerboard for Transparent QR Mode */
.preview-stage.transparent-bg {
    background-image: 
        linear-gradient(45deg, #11141c 25%, transparent 25%), 
        linear-gradient(-45deg, #11141c 25%, transparent 25%), 
        linear-gradient(45deg, transparent 75%, #11141c 75%), 
        linear-gradient(-45deg, transparent 75%, #11141c 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

/* QR Code Frame Wrapper */
.qr-frame-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    border-radius: 12px;
}

/* Frame None - Elegant Card Canvas with Extended Quiet Room */
.qr-frame-wrapper.frame-none {
    padding: 18px;
    background: #ffffff;
    border-radius: 18px;
    box-shadow: 0 16px 36px -8px rgba(0, 0, 0, 0.65), 0 0 0 1px rgba(255, 255, 255, 0.08);
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.qr-frame-wrapper.frame-none.is-transparent {
    background: transparent !important;
    box-shadow: none !important;
    padding: 6px;
}

/* Frame Banner (Bottom Pill) */
.qr-frame-wrapper.frame-banner {
    background: #090b10;
    border: 3px solid var(--theme-frame-color, var(--theme-accent)) !important;
    padding: 18px 18px 14px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5), 0 0 16px rgba(0, 240, 255, 0.2);
    border-radius: 18px;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.qr-frame-wrapper.frame-banner .frame-banner-bottom {
    margin-top: 14px;
    background: var(--theme-frame-color, var(--theme-accent));
    color: #050d14;
    padding: 7px 18px;
    border-radius: 20px;
    font-family: var(--theme-font-body);
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.8px;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

/* Frame Polaroid Card */
.qr-frame-wrapper.frame-card {
    background: #ffffff;
    padding: 16px 16px 20px;
    border-radius: 8px;
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.6);
}

.qr-frame-wrapper.frame-card .frame-banner-bottom {
    margin-top: 14px;
    color: #111827;
    font-family: var(--theme-font-body);
    font-size: 0.85rem;
    font-weight: 800;
    letter-spacing: 0.5px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* Frame Header Tag */
.qr-frame-wrapper.frame-tag {
    background: #090b10;
    border: 1px solid rgba(255, 255, 255, 0.12);
    padding: 14px 18px 16px;
    border-radius: 14px;
}

.qr-frame-wrapper.frame-tag .frame-tag-top {
    margin-bottom: 12px;
    color: var(--theme-frame-color, var(--theme-accent));
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 1px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.tag-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
}

/* Canvas Stage Elements */
.qr-canvas-box {
    width: 280px;
    height: 280px;
    max-width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    overflow: hidden;
}

.qr-canvas-box canvas, .qr-canvas-box svg {
    width: 280px !important;
    height: 280px !important;
    max-width: 100% !important;
    display: block;
    image-rendering: auto;
    -webkit-font-smoothing: antialiased;
    shape-rendering: geometricPrecision;
}

/* Meta summary row */
.preview-meta-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin: 16px 0;
    background: rgba(0, 0, 0, 0.2);
    padding: 10px 14px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.meta-label {
    font-size: 0.68rem;
    font-weight: 700;
    color: var(--theme-text-muted);
}

.meta-val {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--theme-text);
}

.meta-val.text-green {
    color: var(--theme-green);
}

/* Download and Action Area */
.download-section {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.export-options-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.mini-select {
    width: auto !important;
    padding: 5px 28px 5px 10px !important;
    font-size: 0.76rem !important;
}

/* 1-Click Clipboard Action Button */
.btn-copy-clipboard {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 10px 16px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 8px;
    color: var(--theme-text);
    font-family: var(--theme-font-body);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-copy-clipboard:hover {
    background: rgba(0, 240, 255, 0.12);
    border-color: var(--theme-accent);
    color: var(--theme-accent);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
    transform: translateY(-1px);
}

.btn-copy-clipboard.copied {
    background: rgba(0, 255, 136, 0.18);
    border-color: var(--theme-green);
    color: var(--theme-green);
}

/* Format Pill Group & Download Button */
.format-pill-group {
    display: flex;
    gap: 6px;
    background: rgba(0, 0, 0, 0.3);
    padding: 4px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.format-pill {
    flex: 1;
    padding: 6px 12px;
    border: none;
    background: transparent;
    color: var(--theme-text-muted);
    font-family: var(--theme-font-body);
    font-size: 0.78rem;
    font-weight: 700;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.format-pill:hover {
    color: #ffffff;
}

.format-pill.active {
    background: var(--theme-accent);
    color: #050d14;
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.35);
}

.vector-hint-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: rgba(0, 240, 255, 0.08);
    border: 1px solid rgba(0, 240, 255, 0.2);
    border-radius: 6px;
    font-size: 0.74rem;
    color: var(--theme-accent);
    font-weight: 600;
}

.vector-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--theme-accent);
    box-shadow: 0 0 8px var(--theme-accent);
}

.btn-download-primary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    min-height: 46px;
    padding: 12px 20px;
    background: linear-gradient(135deg, #00f0ff 0%, #00b4d8 100%);
    color: #050d14;
    border: none;
    border-radius: 9px;
    font-family: var(--theme-font-body);
    font-size: 0.88rem;
    font-weight: 800;
    letter-spacing: 0.3px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 4px 14px rgba(0, 240, 255, 0.35);
}

.btn-download-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(0, 240, 255, 0.55);
    filter: brightness(1.05);
}

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

/* Tab Step Navigation Bar */
.tab-nav-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.tab-nav-step-count {
    font-size: 0.74rem;
    font-weight: 700;
    color: var(--theme-text-muted);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.btn-step-next,
.btn-step-finish {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 18px;
    background: var(--theme-accent);
    color: #050d14;
    border: none;
    border-radius: 8px;
    font-family: var(--theme-font-body);
    font-size: 0.82rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    white-space: nowrap;
    margin-left: auto;
}

.btn-step-next:hover,
.btn-step-finish:hover {
    box-shadow: 0 0 14px rgba(0, 240, 255, 0.45);
    transform: translateY(-1px);
}

.btn-step-prev {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 8px;
    color: var(--theme-text);
    font-family: var(--theme-font-body);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.btn-step-prev:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.22);
    transform: translateY(-1px);
}

/* iOS Shortcuts-Style Symbols Grid */
.shortcuts-symbols-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 10px;
    margin-top: 8px;
}

@media (max-width: 600px) {
    .shortcuts-symbols-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.shortcut-symbol-btn {
    aspect-ratio: 1;
    border-radius: 12px;
    border: 2px solid transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: relative;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.35);
    padding: 0;
    overflow: hidden;
}

.shortcut-symbol-btn svg {
    width: 20px;
    height: 20px;
    color: #ffffff;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.35));
    transition: transform 0.2s ease;
}

.shortcut-symbol-btn:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.5);
}

.shortcut-symbol-btn.active {
    border-color: #ffffff;
    box-shadow: 0 0 14px rgba(255, 255, 255, 0.55), 0 3px 8px rgba(0, 0, 0, 0.5);
    transform: scale(1.06);
}

/* ==========================================================================
   Toast Notification
   ========================================================================== */
.qr-toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    background: #0c1017;
    border: 1px solid var(--theme-accent);
    color: #fff;
    padding: 10px 18px;
    border-radius: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6), 0 0 16px rgba(0, 240, 255, 0.3);
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--theme-font-body);
    font-size: 0.82rem;
    font-weight: 600;
    z-index: 9999;
    animation: toastSlideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.qr-toast.hidden {
    display: none;
}

.toast-icon {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--theme-accent);
    color: #050d14;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 900;
}

@keyframes toastSlideUp {
    from { opacity: 0; transform: translate(-50%, 12px); }
    to { opacity: 1; transform: translate(-50%, 0); }
}

/* ==========================================================================
   Corner Shape Visual Chips Grid
   ========================================================================== */
.corner-shape-chips-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

#corner-dot-chips {
    grid-template-columns: repeat(auto-fit, minmax(72px, 1fr));
}

.corner-shape-chip {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 6px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 9px;
    color: var(--theme-text-muted);
    font-family: var(--theme-font-body);
    font-size: 0.74rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.16s cubic-bezier(0.16, 1, 0.3, 1);
    white-space: nowrap;
}

.corner-shape-chip svg {
    color: var(--theme-text-muted);
    transition: all 0.16s ease;
}

.corner-shape-chip:hover {
    border-color: rgba(0, 240, 255, 0.35);
    background: rgba(0, 240, 255, 0.05);
    color: var(--theme-text);
    transform: translateY(-1px);
}

.corner-shape-chip:hover svg {
    color: var(--theme-accent);
}

.corner-shape-chip.active {
    background: rgba(0, 240, 255, 0.12);
    border-color: var(--theme-accent);
    color: var(--theme-accent);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.25);
}

.corner-shape-chip.active svg {
    color: var(--theme-accent);
}

/* ==========================================================================
   Form Field Badges (Required vs Optional)
   ========================================================================== */
.form-badge-req {
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--theme-pink);
    background: rgba(255, 0, 85, 0.12);
    border: 1px solid rgba(255, 0, 85, 0.25);
    padding: 1px 5px;
    border-radius: 4px;
    margin-left: 6px;
    letter-spacing: 0.5px;
}

.form-badge-opt {
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--theme-text-muted);
    background: rgba(255, 255, 255, 0.05);
    padding: 1px 5px;
    border-radius: 4px;
    margin-left: 6px;
    letter-spacing: 0.2px;
}

/* ==========================================================================
   CTA Text Color & Auto Contrast Controls
   ========================================================================== */
.btn-auto-contrast {
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid rgba(0, 240, 255, 0.3);
    color: var(--theme-accent);
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 0.68rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.15s;
    font-family: var(--theme-font-body);
}

.btn-auto-contrast:hover {
    background: rgba(0, 240, 255, 0.22);
    box-shadow: 0 0 8px rgba(0, 240, 255, 0.3);
}

.quick-cta-color-btn {
    padding: 4px 9px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    color: var(--theme-text-muted);
    font-family: var(--theme-font-body);
    font-size: 0.7rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}

.quick-cta-color-btn:hover {
    background: rgba(255, 255, 255, 0.09);
    color: var(--theme-text);
    border-color: rgba(255, 255, 255, 0.2);
}

/* ==========================================================================
   Tab 4: Presets Catalog & JSON Studio
   ========================================================================== */
.presets-tab-header {
    margin-bottom: 16px;
}

.presets-intro {
    margin-bottom: 12px;
}

.presets-tab-title {
    font-family: var(--theme-font-title);
    font-size: clamp(0.72rem, 1.8vw, 0.84rem);
    color: var(--theme-accent);
    margin: 0 0 4px 0;
    letter-spacing: 0.5px;
}

.presets-tab-desc {
    font-size: 0.8rem;
    color: var(--theme-text-muted);
    line-height: 1.45;
    margin: 0;
}

.presets-tab-desc code {
    background: rgba(255, 255, 255, 0.08);
    color: var(--theme-green);
    padding: 1px 4px;
    border-radius: 4px;
    font-size: 0.78rem;
}

.preset-search-wrap {
    margin-bottom: 10px;
}

.preset-category-chips {
    display: flex;
    gap: 6px;
    overflow-x: auto;
    padding-bottom: 6px;
    scrollbar-width: none;
}

.preset-category-chips::-webkit-scrollbar {
    display: none;
}

.category-chip {
    padding: 5px 11px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    color: var(--theme-text-muted);
    font-family: var(--theme-font-body);
    font-size: 0.72rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
    flex-shrink: 0;
}

.category-chip:hover {
    border-color: rgba(0, 240, 255, 0.3);
    color: var(--theme-text);
}

.category-chip.active {
    background: rgba(0, 240, 255, 0.12);
    border-color: var(--theme-accent);
    color: var(--theme-accent);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
}

/* Presets Catalog Grid in Tab 4 */
.presets-catalog-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 20px;
    max-height: 380px;
    overflow-y: auto;
    padding-right: 4px;
}

.presets-catalog-grid::-webkit-scrollbar {
    width: 5px;
}

.presets-catalog-grid::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
}

.preset-catalog-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
}

.preset-catalog-card:hover {
    background: rgba(0, 240, 255, 0.05);
    border-color: rgba(0, 240, 255, 0.35);
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
}

.preset-catalog-card.active {
    background: rgba(0, 240, 255, 0.12);
    border-color: var(--theme-accent);
    box-shadow: 0 0 14px rgba(0, 240, 255, 0.3);
}

.preset-catalog-thumb {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    overflow: hidden;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.preset-catalog-thumb svg {
    width: 100%;
    height: 100%;
}

.preset-catalog-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.preset-catalog-name {
    font-weight: 700;
    font-size: 0.82rem;
    color: var(--theme-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.preset-catalog-meta {
    display: flex;
    align-items: center;
    gap: 6px;
}

.preset-catalog-tag {
    font-size: 0.68rem;
    color: var(--theme-text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.preset-catalog-cat-badge {
    font-size: 0.6rem;
    color: var(--theme-green);
    background: rgba(0, 255, 136, 0.1);
    padding: 1px 4px;
    border-radius: 3px;
    white-space: nowrap;
}

/* ==========================================================================
   Developer & Preset Builder Bottom Drawer (Discreet)
   ========================================================================== */
.dev-tools-drawer {
    margin-top: 24px;
    background: rgba(12, 14, 22, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 10px;
    overflow: hidden;
    transition: all 0.2s ease;
}

.dev-tools-drawer[open] {
    border-color: rgba(0, 240, 255, 0.25);
    background: rgba(14, 17, 26, 0.95);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.dev-tools-summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    cursor: pointer;
    user-select: none;
    background: rgba(255, 255, 255, 0.02);
    font-size: 0.76rem;
    font-weight: 600;
    color: var(--theme-text-muted);
    transition: all 0.15s ease;
}

.dev-tools-summary:hover {
    color: var(--theme-accent);
    background: rgba(0, 240, 255, 0.04);
}

.dev-summary-title {
    display: flex;
    align-items: center;
    gap: 8px;
}

.dev-summary-badge {
    font-size: 0.62rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.06);
    color: var(--theme-text-muted);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.dev-tools-content {
    padding: 0 14px 14px 14px;
}

.dev-tools-content .preset-builder-card {
    margin-top: 6px;
}

/* Preset Builder & GitHub Exporter Box */
.preset-builder-card {
    background: rgba(14, 17, 26, 0.8);
    border: 1px solid rgba(0, 240, 255, 0.2);
    border-radius: 12px;
    padding: 16px;
    margin-top: 14px;
}

.preset-builder-header {
    margin-bottom: 12px;
}

.preset-builder-title-wrap {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--theme-accent);
}

.preset-builder-title {
    font-family: var(--theme-font-title);
    font-size: 0.72rem;
    letter-spacing: 0.5px;
}

.preset-builder-actions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin-top: 12px;
}

.btn-preset-action {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 9px 8px;
    border-radius: 8px;
    font-family: var(--theme-font-body);
    font-size: 0.74rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.18s ease;
    white-space: nowrap;
}

.btn-save-local {
    background: rgba(0, 255, 136, 0.12);
    border: 1px solid rgba(0, 255, 136, 0.3);
    color: var(--theme-green);
}

.btn-save-local:hover {
    background: rgba(0, 255, 136, 0.25);
    box-shadow: 0 0 10px rgba(0, 255, 136, 0.35);
}

.btn-copy-json {
    background: rgba(0, 240, 255, 0.12);
    border: 1px solid rgba(0, 240, 255, 0.3);
    color: var(--theme-accent);
}

.btn-copy-json:hover {
    background: rgba(0, 240, 255, 0.25);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.35);
}

.btn-import-json {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--theme-text);
}

.btn-import-json:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
}

/* Live JSON Code Container */
.json-preview-container {
    margin-top: 12px;
    background: #06080d;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    overflow: hidden;
}

.json-preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 10px;
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.json-preview-label {
    font-size: 0.66rem;
    font-weight: 700;
    color: var(--theme-text-muted);
    letter-spacing: 0.5px;
}

.btn-code-copy {
    background: rgba(0, 240, 255, 0.15);
    border: 1px solid rgba(0, 240, 255, 0.3);
    color: var(--theme-accent);
    font-size: 0.65rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 4px;
    cursor: pointer;
    font-family: var(--theme-font-body);
    transition: all 0.15s;
}

.btn-code-copy:hover {
    background: rgba(0, 240, 255, 0.3);
}

.json-code-box {
    margin: 0;
    padding: 10px;
    max-height: 140px;
    overflow-y: auto;
    font-family: "Courier New", Courier, monospace;
    font-size: 0.72rem;
    color: #00ff88;
    line-height: 1.4;
    white-space: pre-wrap;
    word-break: break-all;
}

/* Import JSON Dialog */
.import-json-box {
    margin-top: 12px;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 10px;
}

.import-actions-row {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 8px;
}

/* GitHub Guide Card */
.github-guide-card {
    margin-top: 14px;
    padding: 10px 12px;
    background: rgba(0, 0, 0, 0.25);
    border-left: 3px solid var(--theme-accent);
    border-radius: 0 8px 8px 0;
}

.guide-title {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--theme-text);
    margin-bottom: 6px;
    letter-spacing: 0.5px;
}

.guide-steps {
    margin: 0;
    padding-left: 16px;
    font-size: 0.72rem;
    color: var(--theme-text-muted);
    line-height: 1.5;
}

.guide-steps code {
    color: var(--theme-accent);
    background: rgba(255, 255, 255, 0.06);
    padding: 0 4px;
    border-radius: 3px;
}

/* Utility state */
.hidden {
    display: none !important;
}

.presets-carousel-wrapper.hidden {
    display: none !important;
}

/* Mobile Quick Navigation Bar */
.mobile-quick-bar {
    display: none;
}

@media (max-width: 960px) {
    .mobile-quick-bar {
        display: flex;
        align-items: center;
        position: fixed;
        bottom: 18px;
        left: 50%;
        transform: translateX(-50%);
        z-index: 999;
        background: rgba(14, 16, 26, 0.94);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border: 1px solid rgba(0, 240, 255, 0.35);
        border-radius: 999px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.7), 0 0 16px rgba(0, 240, 255, 0.2);
        padding: 5px 8px;
        gap: 8px;
        max-width: calc(100vw - 32px);
    }

    .mobile-quick-btn {
        display: inline-flex;
        align-items: center;
        gap: 7px;
        background: rgba(255, 255, 255, 0.07);
        border: 1px solid rgba(255, 255, 255, 0.12);
        border-radius: 999px;
        color: var(--theme-text);
        font-family: var(--font-body);
        font-size: 0.78rem;
        font-weight: 700;
        padding: 8px 14px;
        cursor: pointer;
        white-space: nowrap;
        touch-action: manipulation;
        transition: all 0.15s ease;
    }

    .mobile-quick-btn:active {
        transform: scale(0.95);
        background: rgba(0, 240, 255, 0.15);
    }

    .mobile-quick-dot {
        width: 8px;
        height: 8px;
        border-radius: 50%;
        background: var(--theme-accent);
        box-shadow: 0 0 8px var(--theme-accent);
        display: inline-block;
    }

    .mobile-quick-download {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: var(--theme-accent);
        border: none;
        border-radius: 999px;
        color: #050d14;
        font-family: var(--font-body);
        font-size: 0.78rem;
        font-weight: 800;
        padding: 8px 16px;
        cursor: pointer;
        white-space: nowrap;
        touch-action: manipulation;
        box-shadow: 0 0 12px rgba(0, 240, 255, 0.4);
        transition: all 0.15s ease;
    }

    .mobile-quick-download:active {
        transform: scale(0.95);
        filter: brightness(0.9);
    }
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */
@media (max-width: 960px) {
    .editor-grid {
        grid-template-columns: 1fr;
    }

    .preview-column {
        position: static;
        order: 1;
        width: 100%;
        min-width: 0;
    }

    .workbench-column {
        order: 2;
        width: 100%;
        min-width: 0;
    }

    .payload-chips-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 600px) {
    .app-shell {
        padding: 10px 8px 90px; /* Extra bottom padding so content is not obscured by mobile-quick-bar */
    }

    .workbench-column, .preview-column {
        padding: 12px 10px;
        border-radius: 12px;
    }

    .preview-stage {
        padding: 12px 8px;
        min-height: 240px;
    }

    .qr-canvas-box {
        width: min(250px, calc(100vw - 60px));
        height: min(250px, calc(100vw - 60px));
    }

    .qr-canvas-box canvas, .qr-canvas-box svg {
        width: min(250px, calc(100vw - 60px)) !important;
        height: min(250px, calc(100vw - 60px)) !important;
    }

    .payload-chips-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 6px;
    }

    .payload-chip, .shape-chip, .corner-shape-chip, .frame-chip {
        min-height: 44px;
        touch-action: manipulation;
    }

    .shape-chips-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 6px;
    }

    .corner-shape-chips-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 6px;
    }

    #corner-dot-chips {
        grid-template-columns: repeat(3, 1fr);
        gap: 6px;
    }

    .form-row-2, .form-row-3 {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .frame-chips-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 6px;
    }

    .presets-carousel-track {
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        padding: 6px 2px 12px;
    }

    .preset-card {
        scroll-snap-align: start;
        touch-action: manipulation;
    }

    .presets-catalog-grid {
        grid-template-columns: 1fr;
    }

    .preset-builder-actions {
        grid-template-columns: 1fr;
    }

    .workbench-tabs {
        flex-direction: row;
        overflow-x: auto;
        padding: 4px;
        gap: 6px;
        scrollbar-width: none;
        -webkit-overflow-scrolling: touch;
        scroll-snap-type: x mandatory;
    }

    .workbench-tabs::-webkit-scrollbar {
        display: none;
    }

    .tab-btn {
        flex: 0 0 auto;
        padding: 10px 14px;
        font-size: 0.76rem;
        white-space: nowrap;
        min-height: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        scroll-snap-align: start;
        touch-action: manipulation;
    }

    .export-options-row {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
    }

    .export-options-row .form-group {
        width: 100%;
    }

    .export-options-row .form-select {
        width: 100% !important;
    }

    .preview-meta-row {
        grid-template-columns: 1fr 1fr;
        gap: 6px;
        padding: 8px 10px;
    }

    .tab-nav-bar {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }

    .btn-step-next, .btn-step-finish, .btn-step-prev {
        width: 100%;
        min-height: 44px;
        justify-content: center;
        margin-left: 0;
        touch-action: manipulation;
    }

    .presets-all-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
        max-height: 380px;
    }
}