/* Premium Color Palette Matrix Stylesheet */

/* --- Design Tokens & CSS Variables --- */
:root {
    /* Color System (Default: Dark Modern theme) */
    --bg-base: #0a0d1a;
    --bg-surface: rgba(20, 24, 46, 0.65);
    --bg-surface-solid: #14182e;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-focus: rgba(99, 102, 241, 0.5);
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --primary-accent: #6366f1;
    --primary-accent-hover: #4f46e5;
    --secondary-accent: rgba(255, 255, 255, 0.06);
    --secondary-accent-hover: rgba(255, 255, 255, 0.12);
    
    --glow-color-1: rgba(99, 102, 241, 0.15);
    --glow-color-2: rgba(236, 72, 153, 0.15);
    
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --card-shadow: 0 4px 20px 0 rgba(0, 0, 0, 0.2);
    
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --radius-lg: 20px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --transition-bounce: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Light Theme Variables */
[data-theme="light"] {
    --bg-base: #f4f6fa;
    --bg-surface: rgba(255, 255, 255, 0.7);
    --bg-surface-solid: #ffffff;
    --border-color: rgba(0, 0, 0, 0.06);
    --border-focus: rgba(99, 102, 241, 0.5);
    
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --text-muted: #9ca3af;
    
    --primary-accent: #4f46e5;
    --primary-accent-hover: #3730a3;
    --secondary-accent: rgba(0, 0, 0, 0.04);
    --secondary-accent-hover: rgba(0, 0, 0, 0.08);
    
    --glow-color-1: rgba(99, 102, 241, 0.08);
    --glow-color-2: rgba(236, 72, 153, 0.08);
    
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.05);
    --card-shadow: 0 4px 20px 0 rgba(0, 0, 0, 0.05);
}

/* --- Base & Reset --- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-base);
    color: var(--text-primary);
    min-height: 100vh;
    position: relative;
    transition: background-color 0.5s ease, color 0.3s ease;
}

/* --- Dynamic Background Glows --- */
.glow-bg {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    overflow: hidden;
    z-index: -1;
    pointer-events: none;
}

.glow-sphere {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    transition: var(--transition-smooth);
}

.glow-1 {
    width: 600px;
    height: 600px;
    background: var(--glow-color-1);
    top: -200px;
    right: -100px;
    animation: floatGlow1 20s infinite alternate;
}

.glow-2 {
    width: 500px;
    height: 500px;
    background: var(--glow-color-2);
    bottom: -100px;
    left: -100px;
    animation: floatGlow2 25s infinite alternate;
}

@keyframes floatGlow1 {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(-80px, 80px) scale(1.1); }
}

@keyframes floatGlow2 {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(80px, -80px) scale(1.2); }
}

/* --- Main Layout --- */
.app-container {
    max-width: 1540px; /* Slightly wider to give matrix more room */
    margin: 0 auto;
    padding: 2.5rem 1.5rem;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* --- Header Styles --- */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    margin-bottom: 2.5rem;
    gap: 1rem;
    position: relative;
}

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

.logo-icon {
    font-size: 2.2rem;
    animation: rotateLogo 6s infinite ease-in-out;
}

@keyframes rotateLogo {
    0%, 100% { transform: rotate(0deg); }
    50% { transform: rotate(15deg); }
}

.app-header h1 {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, #a5b4fc, #ec4899);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.03em;
}

[data-theme="light"] .app-header h1 {
    background: linear-gradient(135deg, #4f46e5, #db2777);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    flex-basis: 100%;
    margin-top: 0.25rem;
    font-weight: 300;
}

.theme-toggle-btn {
    background: var(--secondary-accent);
    border: 1px solid var(--border-color);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-bounce);
    box-shadow: var(--card-shadow);
}

.theme-toggle-btn:hover {
    background: var(--secondary-accent-hover);
    transform: scale(1.08) rotate(15deg);
}

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

.toggle-icon {
    font-size: 1.25rem;
}

/* --- App Dashboard Layout --- */
.app-dashboard {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 2rem;
    align-items: start;
    flex-grow: 1;
}

/* グリッドアイテムの既定は min-width:auto なので、中身（最小1240pxのマトリクス）に
   引きずられてトラックが膨らみ、ページ全体が横に溢れる。0 を明示して縮めるようにし、
   溢れは .matrix-scroll-wrapper の内部スクロールで受ける。 */
.app-dashboard > * {
    min-width: 0;
}

@media (max-width: 1200px) {
    .app-dashboard {
        grid-template-columns: minmax(0, 1fr);
    }
}

/* --- Glassmorphism Cards --- */
.glass-card {
    background: var(--bg-surface);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--glass-shadow);
    transition: border-color 0.3s ease, background-color 0.3s ease;
}

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

[data-theme="light"] .glass-card:hover {
    border-color: rgba(0, 0, 0, 0.1);
}

/* --- Section Typography --- */
.section-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    letter-spacing: -0.01em;
    position: relative;
    padding-left: 0.75rem;
}

.section-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 18px;
    background: var(--primary-accent);
    border-radius: 2px;
}

/* --- Sidebar Control Panel Styles --- */
.control-panel {
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.control-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

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

.badge {
    font-size: 0.75rem;
    font-weight: 700;
    background: var(--primary-accent);
    color: white;
    padding: 0.2rem 0.6rem;
    border-radius: 20px;
    letter-spacing: 0.02em;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

/* Input Fields */
input[type="text"] {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.85rem 1rem;
    border-radius: var(--radius-md);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    width: 100%;
    outline: none;
    transition: var(--transition-smooth);
}

[data-theme="light"] input[type="text"] {
    background: rgba(255, 255, 255, 0.8);
}

input[type="text"]:focus {
    border-color: var(--primary-accent);
    box-shadow: 0 0 0 3px var(--border-focus);
    background: rgba(0, 0, 0, 0.3);
}

[data-theme="light"] input[type="text"]:focus {
    background: #ffffff;
}

.helper-text {
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.helper-text code {
    background: rgba(255, 255, 255, 0.08);
    padding: 0.1rem 0.3rem;
    border-radius: 4px;
    font-family: var(--font-mono);
}

[data-theme="light"] .helper-text code {
    background: rgba(0, 0, 0, 0.05);
}

.mt-1 { margin-top: 0.25rem; }

/* Color Picker Wrapper */
.color-picker-wrapper {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    position: relative;
}

.picker-preview {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    overflow: hidden;
    cursor: pointer;
    position: relative;
    box-shadow: var(--card-shadow);
    transition: var(--transition-smooth);
    flex-shrink: 0;
}

.picker-preview:hover {
    transform: scale(1.05);
    border-color: var(--primary-accent);
}

.picker-preview input[type="color"] {
    position: absolute;
    top: -10px;
    left: -10px;
    width: 70px;
    height: 70px;
    border: none;
    cursor: pointer;
    background: transparent;
}

/* Slider styling */
.slider-wrapper {
    position: relative;
    padding: 0.5rem 0;
}

input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.1);
    outline: none;
    transition: var(--transition-smooth);
}

[data-theme="light"] input[type="range"] {
    background: rgba(0, 0, 0, 0.1);
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-accent);
    cursor: pointer;
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.5);
    transition: var(--transition-bounce);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.8);
}

.slider-ticks {
    display: flex;
    justify-content: space-between;
    margin-top: 0.4rem;
    padding: 0 2px;
}

.slider-ticks span {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* Radio buttons styled */
.radio-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition-smooth);
}

.radio-label:hover {
    color: var(--text-primary);
}

.radio-label input[type="radio"] {
    display: none;
}

.radio-custom {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    display: inline-block;
    position: relative;
    transition: var(--transition-smooth);
    background: rgba(0, 0, 0, 0.15);
}

.radio-label input[type="radio"]:checked + .radio-custom {
    border-color: var(--primary-accent);
}

.radio-custom::after {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--primary-accent);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    border-radius: 50%;
    transition: var(--transition-bounce);
}

.radio-label input[type="radio"]:checked + .radio-custom::after {
    transform: translate(-50%, -50%) scale(1);
}

/* --- Buttons System --- */
.btn {
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.9rem;
    padding: 0.85rem 1.25rem;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: var(--transition-bounce);
    box-shadow: var(--card-shadow);
}

.btn:active {
    transform: scale(0.96);
}

.btn-primary {
    background: var(--primary-accent);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: var(--secondary-accent);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--secondary-accent-hover);
    transform: translateY(-2px);
}

.action-buttons-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

/* --- Main Area & Grid View --- */
.palette-container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    min-width: 0;
}

.palette-panel {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.75rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.info-pill {
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
    border: 1px solid rgba(16, 185, 129, 0.2);
    padding: 0.4rem 0.8rem;
    border-radius: 30px;
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.pill-dot {
    width: 6px;
    height: 6px;
    background-color: #10b981;
    border-radius: 50%;
    display: inline-block;
    animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.4); opacity: 0.4; }
    100% { transform: scale(1); opacity: 1; }
}

/* --- View Toggle Tabs (Single vs Matrix) --- */
.view-tabs {
    display: flex;
    background: var(--secondary-accent);
    border: 1px solid var(--border-color);
    padding: 0.25rem;
    border-radius: var(--radius-md);
    box-shadow: var(--card-shadow);
}

[data-theme="light"] .view-tabs {
    background: rgba(0, 0, 0, 0.03);
}

.view-tab-btn {
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    padding: 0.55rem 1.1rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-bounce);
}

.view-tab-btn:hover {
    color: var(--text-primary);
}

.view-tab-btn.active {
    background: var(--primary-accent);
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* View switcher content wrappers */
.palette-views-wrapper {
    position: relative;
    width: 100%;
}

.palette-view-content {
    display: none;
    opacity: 0;
}

.palette-view-content.active {
    display: block;
    opacity: 1;
    animation: fadeInView 0.4s ease-out forwards;
}

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

/* --- Colors Grid Layout (Single View) --- */
.palette-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 1rem;
}

@media (max-width: 640px) {
    .palette-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Dynamic Color Blocks (Single View) */
.color-card {
    border-radius: var(--radius-md);
    aspect-ratio: 1 / 1.05;
    padding: 1.25rem 0.85rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-bounce);
    user-select: none;
}

.color-card:hover {
    transform: translateY(-8px) scale(1.04);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.35);
    border-color: rgba(255, 255, 255, 0.2);
}

[data-theme="light"] .color-card:hover {
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.12);
    border-color: rgba(0, 0, 0, 0.08);
}

/* Active 3D Press effect */
.color-card:active {
    transform: translateY(-2px) scale(0.98);
    transition: all 0.1s ease;
}

/* Indicator badge when card is the matching tone */
.color-card.is-base-color::after {
    content: 'BASE';
    position: absolute;
    top: 6px;
    right: 6px;
    font-size: 0.6rem;
    font-weight: 800;
    padding: 1px 4px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.25);
    color: inherit;
    letter-spacing: 0.03em;
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.card-header {
    display: flex;
    flex-direction: column;
}

.color-weight {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1;
    margin-bottom: 0.15rem;
}

.wcag-score {
    font-size: 0.65rem;
    font-weight: 600;
    opacity: 0.7;
    text-transform: uppercase;
}

.card-footer {
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
}

.color-hex {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: -0.01em;
}

.wcag-ratio {
    font-size: 0.65rem;
    opacity: 0.6;
    font-weight: 500;
}

/* Ripple click visual effect */
.card-ripple {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    width: 150%;
    height: 150%;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    pointer-events: none;
    opacity: 0;
}

@keyframes rippleEffect {
    0% { transform: translate(-50%, -50%) scale(0); opacity: 0.8; }
    100% { transform: translate(-50%, -50%) scale(1); opacity: 0; }
}

/* --- Full Multi-Hue Color Matrix (Matrix View) --- */
.matrix-scroll-wrapper {
    overflow-x: auto;
    max-width: 100%;
    margin: 0 -1rem;
    /* 上下にも余白を取る。セルの :hover が scale(1.22) するので、
       余白が無いと最上行と最終列のホバーがスクロール領域に切り取られる。 */
    padding: 0.5rem 1rem;
    -webkit-overflow-scrolling: touch;
    border-radius: var(--radius-md);
}

.matrix-grid-container {
    min-width: 1240px; /* Minimum width to maintain layout spacing without collapsing */
}

/* 横スクロールできることが分かるよう、この領域だけスクロールバーを太く・濃くする */
.matrix-scroll-wrapper::-webkit-scrollbar {
    height: 10px;
}

.matrix-scroll-wrapper::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.22);
}

.matrix-scroll-wrapper::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.35);
}

[data-theme="light"] .matrix-scroll-wrapper::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.22);
}

[data-theme="light"] .matrix-scroll-wrapper::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.35);
}

/* Master Matrix Grid Layout: 20 columns (1 label + 19 Hues) */
.matrix-grid-layout {
    display: grid;
    grid-template-columns: 50px repeat(19, 1fr);
    gap: 5px;
    align-items: center;
}

/* Cell elements in matrix */
.matrix-header-cell {
    font-size: 0.7rem;
    font-weight: 800;
    text-align: center;
    padding: 0.4rem 0;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Header hover effect to show complete name */
.matrix-header-cell:hover {
    color: var(--text-primary);
}

.matrix-row-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 800;
    color: var(--text-secondary);
    text-align: right;
    padding-right: 0.6rem;
    user-select: none;
}

.matrix-cell {
    height: 38px;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 0.6rem;
    font-weight: 800;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.03);
    transition: var(--transition-bounce);
    user-select: none;
    position: relative;
}

/* Small visual indicators inside matrix cells */
.matrix-cell::before {
    content: attr(data-tone);
    font-size: 0.55rem;
    opacity: 0.85;
}

/* Base input color highlight inside matrix */
.matrix-cell.is-base-cell {
    box-shadow: 0 0 0 2px var(--primary-accent), 0 4px 8px rgba(0, 0, 0, 0.4);
    transform: scale(1.08);
    z-index: 5;
}

[data-theme="light"] .matrix-cell.is-base-cell {
    box-shadow: 0 0 0 2px var(--primary-accent), 0 4px 8px rgba(0, 0, 0, 0.15);
}

/* Matrix hover premium scaling and shadow glows */
.matrix-cell:hover {
    transform: scale(1.22) translateY(-2px);
    z-index: 10;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.45);
    border-color: rgba(255, 255, 255, 0.2);
}

[data-theme="light"] .matrix-cell:hover {
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.18);
    border-color: rgba(0, 0, 0, 0.08);
}

.matrix-cell:active {
    transform: scale(0.95);
    transition: all 0.1s ease;
}

/* --- Code Snippets Panel --- */
.code-panel {
    display: flex;
    flex-direction: column;
    position: relative;
    padding: 0; /* Clear default padding for design */
    overflow: hidden;
    min-width: 0;
}

.code-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    background: rgba(0, 0, 0, 0.15);
    border-bottom: 1px solid var(--border-color);
    padding: 0 1.5rem;
    gap: 1rem;
}

[data-theme="light"] .code-panel-header {
    background: rgba(0, 0, 0, 0.02);
}

.code-tabs-header {
    display: flex;
    flex-wrap: wrap;
}

.tab-btn {
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    padding: 1.1rem 1.25rem;
    cursor: pointer;
    position: relative;
    transition: var(--transition-smooth);
}

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

.tab-btn.active {
    color: var(--primary-accent);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 1.25rem;
    right: 1.25rem;
    height: 2px;
    background: var(--primary-accent);
    border-radius: 1px;
}

/* Toggle Switch Styling */
.code-toggle-wrapper {
    display: flex;
    align-items: center;
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    user-select: none;
}

.toggle-label input[type="checkbox"] {
    display: none;
}

.toggle-slider {
    width: 38px;
    height: 20px;
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    position: relative;
    transition: var(--transition-smooth);
}

[data-theme="light"] .toggle-slider {
    background-color: rgba(0, 0, 0, 0.06);
}

.toggle-label input[type="checkbox"]:checked + .toggle-slider {
    background-color: var(--primary-accent);
    border-color: var(--primary-accent);
}

.toggle-slider::before {
    content: '';
    width: 14px;
    height: 14px;
    background: white;
    border-radius: 50%;
    position: absolute;
    top: 2px;
    left: 2px;
    transition: var(--transition-bounce);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

.toggle-label input[type="checkbox"]:checked + .toggle-slider::before {
    transform: translateX(18px);
}

.toggle-text {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: var(--transition-smooth);
}

.toggle-label:hover .toggle-text {
    color: var(--text-primary);
}

.code-body-wrapper {
    position: relative;
    padding: 1.5rem;
    background: rgba(0, 0, 0, 0.25);
}

[data-theme="light"] .code-body-wrapper {
    background: rgba(255, 255, 255, 0.4);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.code-body-wrapper pre {
    margin: 0;
    max-height: 280px;
    overflow: auto; /* 長い行はパネルを広げず、コード内で横スクロールさせる */
}

.code-body-wrapper code {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.6;
    color: #e5e7eb;
}

[data-theme="light"] .code-body-wrapper code {
    color: #374151;
}

.btn-copy-absolute {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 0.75rem;
    padding: 0.45rem 0.85rem;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-copy-absolute:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-1px);
}

[data-theme="light"] .btn-copy-absolute {
    background: #ffffff;
}

[data-theme="light"] .btn-copy-absolute:hover {
    background: #f3f4f6;
}

/* --- Footer note styling --- */
.app-footer-note {
    margin-top: auto;
    padding-top: 3rem;
    text-align: center;
}

.app-footer-note p {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 400;
}

/* --- Toast Notification Banner --- */
.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    /* 長い警告文でも画面外へ伸びないよう上限を持たせる */
    max-width: min(26rem, calc(100vw - 4rem));
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.75rem;
    z-index: 9999;
}

.toast {
    background: #10b981;
    color: white;
    font-weight: 600;
    font-size: 0.9rem;
    padding: 0.9rem 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: 0 10px 25px rgba(16, 185, 129, 0.3);
    display: flex;
    align-items: center;
    gap: 0.6rem;
    transform: translateY(20px);
    opacity: 0;
    animation: slideInToast 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards,
               fadeOutToast 0.4s ease forwards 2.5s;
    pointer-events: auto;
}

.toast-icon {
    font-size: 1.1rem;
}

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

@keyframes fadeOutToast {
    to { transform: translateY(-10px); opacity: 0; visibility: hidden; }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

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

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

[data-theme="light"] ::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.1);
}

[data-theme="light"] ::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.2);
}