/* ============================================================
   QR Maker — style.css
   Design language: mirrors Icon Studio (dark glass, blue accent)
   ============================================================ */

/* ---- Design Tokens ---- */
:root {
    --bg-color: #020617;
    --panel-bg: rgba(30, 41, 59, 0.75);
    --control-bg: rgba(2, 6, 23, 0.6);
    --control-bg-hover: rgba(51, 65, 85, 0.8);
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-subtle: #64748b;
    --radius: 12px;
    --radius-sm: 8px;
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-border-strong: rgba(255, 255, 255, 0.18);
    --input-bg: rgba(2, 6, 23, 0.85);
    --input-border: rgba(255, 255, 255, 0.4);
    --input-border-hover: rgba(255, 255, 255, 0.65);
    --input-border-focus: #3b82f6;
    --input-placeholder: rgba(255, 255, 255, 0.6);
    --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --preview-bg: #0f172a;
    --canvas-bg: #1e293b;
    --danger: #ef4444;
    --app-scale: 1;
    --sidebar-bg: rgba(2, 6, 23, 0.35);
    --checker-color: rgba(255, 255, 255, 0.08);
}

[data-theme="light"] {
    --bg-color: #e2e8f0;
    --panel-bg: rgba(255, 255, 255, 0.82);
    --control-bg: #f1f5f9;
    --control-bg-hover: #e2e8f0;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --text-main: #0f172a;
    --text-muted: #475569;
    --text-subtle: #94a3b8;
    --glass-border: rgba(15, 23, 42, 0.08);
    --glass-border-strong: rgba(15, 23, 42, 0.15);
    --input-bg: #ffffff;
    --input-border: rgba(15, 23, 42, 0.4);
    --input-border-hover: rgba(15, 23, 42, 0.65);
    --input-border-focus: #2563eb;
    --input-placeholder: rgba(15, 23, 42, 0.6);
    --shadow-md: 0 4px 24px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 8px 40px rgba(15, 23, 42, 0.12);
    --preview-bg: #f8fafc;
    --canvas-bg: #e2e8f0;
    --sidebar-bg: rgba(255, 255, 255, 0.65);
    --checker-color: rgba(0, 0, 0, 0.08);
}

@media (prefers-color-scheme: light) {
    :root:not([data-theme]) {
        --bg-color: #e2e8f0;
        --panel-bg: rgba(255, 255, 255, 0.82);
        --control-bg: #f1f5f9;
        --control-bg-hover: #e2e8f0;
        --accent: #2563eb;
        --accent-hover: #1d4ed8;
        --text-main: #0f172a;
        --text-muted: #475569;
        --text-subtle: #94a3b8;
        --glass-border: rgba(15, 23, 42, 0.08);
        --glass-border-strong: rgba(15, 23, 42, 0.15);
        --input-bg: #ffffff;
        --input-border: rgba(15, 23, 42, 0.4);
        --input-border-hover: rgba(15, 23, 42, 0.65);
        --input-border-focus: #2563eb;
        --input-placeholder: rgba(15, 23, 42, 0.6);
        --shadow-md: 0 4px 24px rgba(15, 23, 42, 0.08);
        --shadow-lg: 0 8px 40px rgba(15, 23, 42, 0.12);
        --preview-bg: #f8fafc;
        --canvas-bg: #e2e8f0;
        --sidebar-bg: rgba(255, 255, 255, 0.65);
        --checker-color: rgba(0, 0, 0, 0.08);
    }
}

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

/* ---- Base ---- */
html {
    color-scheme: dark;
    scroll-behavior: smooth;
}

[data-theme="light"] html,
[data-theme="light"] {
    color-scheme: light;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    background-color: var(--bg-color);
    color: var(--text-main);
    height: 100dvh;
    width: 100vw;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0;
    /* Animated gradient background */
    background-image:
        radial-gradient(ellipse at 20% 20%, rgba(59, 130, 246, 0.12) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(139, 92, 246, 0.10) 0%, transparent 50%);
    background-attachment: fixed;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* ---- Layout ---- */
.container {
    width: 100%;
    height: 100%;
    display: grid;
    grid-template-columns: 1fr calc(460px * var(--app-scale));
    gap: 0;
    background: var(--panel-bg);
    backdrop-filter: blur(12px);
    position: relative;
    overflow: hidden;
}

/* ---- Preview Section ---- */
.preview-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    gap: clamp(0.75rem, 3vh, 1.5rem);
    height: 100%;
    padding: clamp(1rem, 5vh, 2.5rem) 2rem;
    overflow: hidden;
    zoom: var(--app-scale);
    position: relative;
    z-index: 2;
}

.preview-header {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.preview-header h1 {
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--text-main) 0%, var(--text-muted) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ---- Theme Toggle ---- */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--glass-border);
    background: var(--control-bg);
    color: var(--text-muted);
    cursor: pointer;
    transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.2s;
    flex-shrink: 0;
}

.theme-toggle:hover {
    background: var(--control-bg-hover);
    color: var(--text-main);
    border-color: var(--glass-border-strong);
    transform: rotate(15deg);
}

.theme-toggle svg {
    width: 16px;
    height: 16px;
}

.sun-icon {
    display: none;
}

.moon-icon {
    display: block;
}

[data-theme="light"] .sun-icon {
    display: block;
}

[data-theme="light"] .moon-icon {
    display: none;
}

@media (prefers-color-scheme: light) {
    :root:not([data-theme]) .sun-icon {
        display: block;
    }

    :root:not([data-theme]) .moon-icon {
        display: none;
    }
}

/* ---- QR Canvas Wrapper ---- */
.qr-canvas-wrapper {
    position: relative;
    width: 100%;
    max-width: min(480px, 55vh);
    aspect-ratio: 1;
    margin: auto 0;
    background: var(--canvas-bg);
    border-radius: var(--radius-sm);
    border: 1px solid var(--glass-border);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

#qr-canvas {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: none;
    image-rendering: pixelated;
    transition: opacity 0.2s ease;
}

#qr-canvas.visible {
    display: block;
}

.qr-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    color: var(--text-subtle);
    padding: 2rem;
    text-align: center;
    transition: opacity 0.2s;
}

.qr-placeholder svg {
    width: 72px;
    height: 72px;
    opacity: 0.3;
}

.qr-placeholder span {
    font-size: 0.8125rem;
    color: var(--text-subtle);
}

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

.qr-error-msg {
    position: absolute;
    bottom: 0.75rem;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
    font-size: 0.75rem;
    padding: 0.375rem 0.75rem;
    border-radius: 100px;
    white-space: nowrap;
    max-width: 90%;
    overflow: hidden;
    text-overflow: ellipsis;
    display: none;
}

.qr-error-msg.visible {
    display: block;
}

/* ---- Preview Actions ---- */
.preview-actions-container {
    width: 100%;
    max-width: min(480px, 55vh);
    margin-bottom: auto;
}

.preview-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    width: 100%;
}

.preview-actions .share-wrapper {
    flex: 1;
}

.preview-actions .share-wrapper button {
    width: 100%;
    justify-content: center;
}

.preview-actions .btn-export {
    flex: 1;
    justify-content: center;
}

/* ---- Split Export Button ---- */
.export-split-btn {
    display: flex;
    align-items: stretch;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--accent);
    margin-left: auto;
    flex-shrink: 0;
}

.export-split-main {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0.75rem;
    background: transparent;
    border: none;
    color: #ffffff;
    font-family: inherit;
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s;
    white-space: nowrap;
}

.export-split-main:hover {
    background: rgba(0, 0, 0, 0.12);
}

.export-split-main:active {
    background: rgba(0, 0, 0, 0.2);
}

.export-split-size {
    display: inline-flex;
    align-items: center;
    gap: 0.2rem;
    padding: 0.5rem 0.625rem 0.5rem 0.5rem;
    background: rgba(0, 0, 0, 0.15);
    border: none;
    border-left: 1px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.85);
    font-family: inherit;
    font-size: 0.7rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    white-space: nowrap;
    line-height: 1;
}

.export-split-size:hover {
    background: rgba(0, 0, 0, 0.25);
    color: #ffffff;
}

.export-split-size:active {
    background: rgba(0, 0, 0, 0.35);
}

.export-split-size #export-size-label {
    font-variant-numeric: tabular-nums;
}

/* ---- Size Popover ---- */
.size-popover {
    position: fixed;
    display: none;
    flex-direction: column;
    gap: 0.125rem;
    background: var(--panel-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border-strong);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    padding: 0.3rem;
    z-index: 200;
    min-width: 100px;
    opacity: 0;
    transform: translateY(6px) scale(0.96);
    transition:
        opacity 0.18s ease-out,
        transform 0.18s cubic-bezier(0.16, 1, 0.3, 1);
}

.size-popover.open {
    display: flex;
    opacity: 1;
    transform: translateY(0) scale(1);
}

@starting-style {
    .size-popover.open {
        opacity: 0;
        transform: translateY(6px) scale(0.96);
    }
}

.size-option {
    display: block;
    width: 100%;
    padding: 0.45rem 0.75rem;
    border: none;
    border-radius: 5px;
    background: transparent;
    color: var(--text-muted);
    font-family: inherit;
    font-size: 0.8125rem;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    transition: background 0.12s, color 0.12s;
    white-space: nowrap;
}

.size-option:hover {
    background: var(--control-bg-hover);
    color: var(--text-main);
}

.size-option.active {
    background: var(--accent);
    color: #ffffff;
}

@media (prefers-reduced-motion: reduce) {
    .size-popover {
        transition: none;
    }
}

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0.875rem;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid transparent;
    transition: background 0.15s, border-color 0.15s, color 0.15s, transform 0.1s, box-shadow 0.15s;
    white-space: nowrap;
    text-decoration: none;
    user-select: none;
}

.btn:active {
    transform: scale(0.97);
}

.btn.secondary {
    background: var(--control-bg);
    border-color: var(--glass-border);
    color: var(--text-muted);
}

.btn.secondary:hover {
    background: var(--control-bg-hover);
    border-color: var(--glass-border-strong);
    color: var(--text-main);
}

.btn-export {
    background: var(--control-bg);
    border-color: var(--glass-border);
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0.875rem;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, color 0.15s, transform 0.1s;
    white-space: nowrap;
    user-select: none;
}

.btn-export:hover {
    background: var(--control-bg-hover);
    border-color: var(--glass-border-strong);
    color: var(--text-main);
}

.btn-export:active {
    transform: scale(0.97);
}

.btn-export.primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #ffffff;
    margin-left: auto;
}

.btn-export.primary:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.4);
}

/* ---- Share Wrapper ---- */
.share-wrapper {
    position: relative;
}

.share-menu {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 0;
    background: var(--panel-bg);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border: 1px solid var(--glass-border-strong);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    min-width: 160px;
    padding: 0.375rem;
    display: none;
    flex-direction: column;
    gap: 0.125rem;
    z-index: 100;
}

.share-menu.open {
    display: flex;
}

.share-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.625rem;
    border-radius: 6px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-family: inherit;
    font-size: 0.8125rem;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    text-align: left;
    width: 100%;
}

.share-item:hover {
    background: var(--accent);
    color: #ffffff;
}

/* ---- Mobile Divider ---- */
.mobile-divider {
    display: none;
    border: none;
    border-top: 1px solid var(--glass-border);
}

/* ---- Controls Section ---- */
.controls-section {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    gap: 0.875rem;
    border-left: 1px solid var(--glass-border);
    padding: 1.5rem;
    height: 100%;
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.1) transparent;
    zoom: var(--app-scale);
    background: var(--sidebar-bg);
    box-shadow: inset 10px 0 30px -10px rgba(0, 0, 0, 0.3);
}

.controls-section::-webkit-scrollbar {
    width: 6px;
}

.controls-section::-webkit-scrollbar-track {
    background: transparent;
}

.controls-section::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}

.controls-section::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* ---- Tab Group ---- */
.tab-group {
    display: flex;
    gap: 0.25rem;
    background: var(--control-bg);
    border-radius: var(--radius-sm);
    padding: 0.25rem;
}

.tab {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    padding: 0.5rem 0.25rem;
    border-radius: 6px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-family: inherit;
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    white-space: nowrap;
}

.tab svg {
    width: 16px;
    height: 16px;
    stroke: currentColor;
    fill: none;
    transition: transform 0.15s;
}

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

.tab:hover svg {
    transform: translateY(-1px);
}

.tab.active {
    background: var(--accent);
    color: #ffffff;
}

/* ---- Dropdown for More Options ---- */
.tab-more-container {
    position: relative;
    flex: 1;
    display: flex;
}

.tab-more-container .tab {
    width: 100%;
}

.tab-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: var(--panel-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    padding: 0.375rem;
    display: none;
    flex-direction: column;
    gap: 0.25rem;
    z-index: 100;
    min-width: 140px;
}

.tab-dropdown.open {
    display: flex;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-family: inherit;
    font-size: 0.75rem;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    width: 100%;
}

.dropdown-item svg {
    width: 14px;
    height: 14px;
    stroke: currentColor;
    fill: none;
}

.dropdown-item:hover {
    background: var(--control-bg-hover);
    color: var(--text-main);
}

.dropdown-item.active {
    background: var(--accent);
    color: #ffffff;
}

/* ---- Input Panels ---- */
.input-panel {
    display: none;
    flex-direction: column;
    gap: 0.75rem;
}

.input-panel.active {
    display: flex;
}

/* ---- Control Groups ---- */
.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.control-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    letter-spacing: 0.01em;
}

.label-optional {
    font-weight: 400;
    color: var(--text-subtle);
    font-size: 0.7rem;
}

.label-value {
    font-weight: 600;
    color: var(--accent);
    margin-left: 0.25rem;
}

.control-label-with-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
}


/* ---- Text Inputs ---- */
.text-input {
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: var(--radius-sm);
    color: var(--text-main);
    font-family: inherit;
    font-size: 0.875rem;
    padding: 0.5rem 0.75rem;
    width: 100%;
    transition: border-color 0.15s, box-shadow 0.15s, background-color 0.15s;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

.text-input::placeholder {
    color: var(--input-placeholder);
}

.text-input:hover {
    border-color: var(--input-border-hover);
}

.text-input:focus {
    border-color: var(--input-border-focus);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
}

.text-input.textarea {
    resize: vertical;
    min-height: 96px;
    line-height: 1.5;
}

/* ---- Password input ---- */
.password-wrapper {
    position: relative;
}

.password-wrapper .text-input {
    padding-right: 2.5rem;
}

.password-toggle {
    position: absolute;
    right: 0.625rem;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: var(--text-subtle);
    cursor: pointer;
    padding: 0.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.15s;
}

.password-toggle:hover {
    color: var(--text-muted);
}

/* ---- Select ---- */
.select-input {
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: var(--radius-sm);
    color: var(--text-main);
    font-family: inherit;
    font-size: 0.875rem;
    padding: 0.5rem 0.75rem;
    width: 100%;
    outline: none;
    cursor: pointer;
    transition: border-color 0.15s, box-shadow 0.15s, background-color 0.15s;
    -webkit-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2.5'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2.25rem;
}

.select-input:hover {
    border-color: var(--input-border-hover);
}

.select-input:focus {
    border-color: var(--input-border-focus);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
}

/* ---- Checkbox ---- */
.checkbox-group {
    flex-direction: row;
    align-items: center;
    gap: 0.5rem;
}

.checkbox-group input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent);
    cursor: pointer;
    flex-shrink: 0;
}

.checkbox-group label {
    font-size: 0.8125rem;
    color: var(--text-muted);
    cursor: pointer;
}

/* ---- Color Input ---- */
.color-input-wrapper {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: var(--radius-sm);
    padding: 0.375rem 0.625rem;
    cursor: pointer;
    transition: border-color 0.15s;
}

.color-input-wrapper:hover {
    border-color: var(--input-border-hover);
}

input[type="color"] {
    width: 28px;
    height: 28px;
    border: none;
    border-radius: 6px;
    padding: 0;
    cursor: pointer;
    background: none;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    flex-shrink: 0;
}

input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
    border-radius: 6px;
    overflow: hidden;
}

input[type="color"]::-webkit-color-swatch {
    border: 1px solid var(--glass-border-strong);
    border-radius: 6px;
}

input[type="color"]::-moz-color-swatch {
    border: 1px solid var(--glass-border-strong);
    border-radius: 6px;
}

.color-hex {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

/* ---- Segmented Control ---- */
.segmented-control {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    background: var(--control-bg);
    border-radius: var(--radius-sm);
    padding: 0.25rem;
}

.seg-btn {
    flex: 1 1 0%;
    padding: 0.375rem 0.5rem;
    border-radius: 6px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-family: inherit;
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    white-space: nowrap;
    text-align: center;
}

.seg-btn:hover {
    color: var(--text-main);
}

.seg-btn.active {
    background: var(--accent);
    color: #ffffff;
}

/* Prevent options from wrapping to a single item on its own line */
#pixel-style .seg-btn,
#corner-style .seg-btn {
    flex: 1 1 calc(33.333% - 0.25rem);
}

/* Enable container queries for responsive layout of options */
.controls-section {
    container-type: inline-size;
}

/* On wider screens/containers where there's plenty of space, let them sit inline */
@container (min-width: 400px) {
    #pixel-style .seg-btn,
    #corner-style .seg-btn {
        flex: 1 1 0%;
        padding: 0.375rem 0.35rem;
    }
}

/* On very narrow containers, reduce font size and padding to fit nicely */
@container (max-width: 350px) {
    #pixel-style .seg-btn,
    #corner-style .seg-btn {
        font-size: 0.75rem;
        padding: 0.375rem 0.25rem;
    }
}

/* ---- Range Slider ---- */
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 4px;
    background: var(--control-bg);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
    accent-color: var(--accent);
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.4);
    transition: transform 0.15s, box-shadow 0.15s;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.15);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.5);
}

input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

/* ---- Section Dividers / Labels ---- */
.section-divider {
    border: none;
    border-top: 1px solid var(--glass-border);
    margin: 0;
}

.section-label {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-subtle);
}

/* ---- Help Text ---- */
.help-text {
    font-size: 0.75rem;
    color: var(--text-subtle);
    line-height: 1.4;
}

/* ---- Toast ---- */
.toast {
    position: fixed;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%) translateY(80px);
    background: var(--panel-bg);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border: 1px solid var(--glass-border-strong);
    border-radius: 100px;
    color: var(--text-main);
    font-size: 0.8125rem;
    font-weight: 500;
    padding: 0.625rem 1.25rem;
    box-shadow: var(--shadow-lg);
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.25s ease;
    white-space: nowrap;
}

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

/* ---- Logo Upload Section ---- */
.logo-upload-container {
    display: flex;
    flex-direction: column;
    gap: 0.875rem;
    padding-top: 0.25rem;
}

.logo-dropzone {
    border: 2px dashed var(--glass-border);
    border-radius: var(--radius-sm);
    padding: 1.5rem;
    text-align: center;
    background: var(--input-bg);
    cursor: pointer;
    transition: border-color 0.2s, background-color 0.2s, transform 0.15s;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.logo-dropzone:hover,
.logo-dropzone.dragover {
    border-color: var(--accent);
    background: rgba(59, 130, 246, 0.05);
}

.logo-dropzone:active {
    transform: scale(0.99);
}

.logo-dropzone svg {
    color: var(--text-subtle);
    transition: color 0.2s;
}

.logo-dropzone:hover svg {
    color: var(--accent);
}

.logo-dropzone span {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.logo-preview-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--input-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    padding: 0.5rem 0.75rem;
}

.logo-thumbnail {
    width: 36px;
    height: 36px;
    border-radius: 4px;
    object-fit: contain;
    border: 1px solid var(--glass-border-strong);
    background: #ffffff;
    /* provide light backing for dark/transparent logos */
    flex-shrink: 0;
}

.logo-info {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
    overflow: hidden;
    flex-grow: 1;
}

.logo-filename {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-main);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.logo-status {
    font-size: 0.7rem;
    color: var(--text-subtle);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.logo-status::before {
    content: "";
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--text-subtle);
}

.logo-status.uploading {
    color: var(--accent);
}

.logo-status.uploading::before {
    background-color: var(--accent);
    animation: pulse-status 1.2s infinite ease-in-out;
}

.logo-status.success {
    color: #10b981;
}

.logo-status.success::before {
    background-color: #10b981;
}

.logo-status.error {
    color: var(--danger);
}

.logo-status.error::before {
    background-color: var(--danger);
}

@keyframes pulse-status {

    0%,
    100% {
        opacity: 0.4;
    }

    50% {
        opacity: 1;
    }
}

.logo-remove-btn {
    background: none;
    border: none;
    color: var(--text-subtle);
    cursor: pointer;
    padding: 0.375rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.15s, background-color 0.15s;
    flex-shrink: 0;
}

.logo-remove-btn:hover {
    color: var(--danger);
    background-color: rgba(239, 68, 68, 0.1);
}

.logo-controls {
    display: flex;
    flex-direction: column;
    gap: 0.875rem;
    animation: fadeIn 0.25s ease-out;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ---- Color Trigger Button & Popover ---- */
.color-trigger-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--control-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    color: var(--text-main);
    cursor: pointer;
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    transition: background-color 0.15s, border-color 0.15s;
    text-align: left;
}

.color-trigger-btn:hover {
    background: var(--control-bg-hover);
    border-color: var(--glass-border-strong);
}

.color-trigger-preview {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 1.5px solid var(--text-muted);
    background-color: #ffffff;
    flex-shrink: 0;
    transition: background-color 0.2s;
    cursor: pointer;
}

.color-trigger-hex {
    font-family: monospace;
    font-size: 13px;
    color: var(--text-muted);
    background: transparent;
    border: none;
    outline: none;
    padding: 0;
    width: 100%;
    cursor: text;
}

.color-trigger-hex:focus {
    color: var(--text-main);
}

.color-swatch[style*="#ffffff"],
.color-swatch[style*="#FFFFFF"] {
    border: 1.5px solid var(--glass-border-strong) !important;
}

/* Inline Color Picker Panel */
.inline-color-picker {
    display: none;
    width: 100%;
    background: var(--control-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    margin-top: 0.5rem;
    overflow: hidden;
    animation: slideDown 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.inline-color-picker.open {
    display: block;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.sheet-body {
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.875rem;
}

/* Spectrum Canvas Container */
.spectrum-container {
    position: relative;
    width: 100%;
    height: 140px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    cursor: crosshair;
}

#color-spectrum-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

.spectrum-cursor {
    position: absolute;
    width: 14px;
    height: 14px;
    border: 2px solid #ffffff;
    box-shadow: 0 1px 5px rgba(0, 0, 0, 0.4);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    left: 50%;
    top: 50%;
}

/* Swatches Row - Single Row Flex Layout */
.swatches-row {
    display: flex;
    align-items: center;
    gap: 6px;
    justify-content: space-between;
    flex-wrap: nowrap;
    /* Do not wrap! Single row. */
    width: 100%;
}

.swatch-btn {
    width: 28px;
    /* Compact size to fit single row */
    height: 28px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.15s;
    outline: none;
    flex-shrink: 0;
}

.swatch-btn:hover {
    transform: scale(1.15);
}

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

.color-swatch {
    border: 1.5px solid rgba(255, 255, 255, 0.15);
    box-shadow: inset 0 0 4px rgba(0, 0, 0, 0.1);
}

.shuffle-btn {
    background: var(--control-bg);
    border: 1px solid var(--glass-border-strong);
    color: var(--text-main);
    display: flex;
    align-items: center;
    justify-content: center;
}

.shuffle-btn:hover {
    background: var(--control-bg-hover);
    color: var(--accent);
}

/* Override preview background with dynamic HSL variable */
.preview-section {
    background-color: var(--theme-tint-bg, var(--preview-bg)) !important;
    background-image: none !important;
    transition: background-color 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}


/* Transparent card bg preview correction */
.qr-canvas-wrapper {
    background: transparent;
    border: none;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1), 0 2px 10px rgba(0, 0, 0, 0.05);
    border-radius: 20px;
    padding: 12px;
}

/* ---- Responsive ---- */
@media (max-width: 899px) {
    body {
        height: auto;
        min-height: 100vh;
        min-height: 100dvh;
        overflow-y: auto;
        padding: 0;
        background-attachment: scroll;
    }

    .container {
        grid-template-columns: 1fr;
        gap: 0;
        padding: 0;
        max-width: 100%;
        width: 100%;
        height: auto;
        overflow: visible;
        border-radius: 0;
        margin: 0;
        border: none;
        box-shadow: none;
        background: var(--panel-bg);
        backdrop-filter: none;
    }

    .preview-section {
        zoom: 1 !important;
        height: auto;
        padding: 0.75rem 1.25rem 0.75rem;
        position: sticky;
        top: 0;
        gap: unset;
        z-index: 10;
        border-radius: 0;
        border-bottom: 1px solid var(--glass-border);
        /* Keep the tinted background opaque so content doesn't bleed through */
        background-color: var(--theme-tint-bg, var(--preview-bg)) !important;
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
    }

    .preview-header h1 {
        font-size: 2rem;
    }

    .qr-canvas-wrapper {
        max-width: min(100%, 220px);
        margin: 0.375rem auto;
    }

    #export-svg-btn {
        display: none;
    }

    .controls-section {
        border-left: none;
        border-radius: 0;
        padding: 1.25rem;
        height: auto;
        overflow-y: visible;
        zoom: 1 !important;
        background: transparent;
        box-shadow: none;
    }

    .mobile-divider {
        display: none;
    }

    .preview-actions {
        flex-wrap: wrap;
    }
}

/* ---- Animations ---- */
.spin {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

/* ---- Footer Actions ---- */
.footer-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 0.5rem;
    padding-bottom: 0.5rem;
    width: 100%;
}

.btn-random {
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-reset-subtle {
    background: none;
    border: none;
    color: var(--text-subtle);
    font-family: inherit;
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: color 0.15s ease, background-color 0.15s ease;
    user-select: none;
}

.btn-reset-subtle:hover {
    color: var(--danger);
    background-color: rgba(239, 68, 68, 0.1);
}

/* Color picker modes inside sheet */
.color-picker-mode-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    width: 100%;
}

.color-picker-mode-row .mode-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
}

.color-picker-mode-row .segmented-control {
    flex-grow: 1;
    max-width: 210px;
    margin: 0;
}

/* Canvas checkerboard pattern for transparent background */
.qr-canvas-wrapper.transparent-bg-active {
    background-image:
        linear-gradient(45deg, var(--checker-color) 25%, transparent 25%),
        linear-gradient(-45deg, var(--checker-color) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, var(--checker-color) 75%),
        linear-gradient(-45deg, transparent 75%, var(--checker-color) 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
}