/* CSS Variables for Theming */
:root {
    /* Colors - Light Theme */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-tertiary: #868e96;
    --border-color: #dee2e6;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    
    /* Button Colors */
    --button-primary-bg: #007bff;
    --button-primary-hover: #0056b3;
    --button-secondary-bg: #6c757d;
    --button-secondary-hover: #545b62;
    
    /* Wheel Colors - Bright Theme */
    --wheel-color-1: #ff6b6b;
    --wheel-color-2: #4ecdc4;
    --wheel-color-3: #45b7d1;
    --wheel-color-4: #96ceb4;
    --wheel-color-5: #feca57;
    --wheel-color-6: #ff9ff3;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-modal: 1050;
    --z-tooltip: 1070;
    --z-overlay: 1080;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #404040;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-tertiary: #808080;
    --border-color: #404040;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
    
    --button-primary-bg: #0d6efd;
    --button-primary-hover: #0b5ed7;
    --button-secondary-bg: #495057;
    --button-secondary-hover: #3a3a3a;
}

/* Reset and Base Styles */
*,
*::before,
*::after {
    box-sizing: border-box;
}

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

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--button-primary-bg);
    color: white;
    padding: 8px;
    text-decoration: none;
    z-index: var(--z-tooltip);
}

.skip-link:focus {
    top: 0;
}

:focus {
    outline: 2px solid var(--button-primary-bg);
    outline-offset: 2px;
}

:focus:not(:focus-visible) {
    outline: none;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header */
header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-lg) 0;
}

header h1 {
    margin: 0 0 var(--spacing-sm) 0;
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
}

.tagline {
    text-align: center;
    color: var(--text-secondary);
    margin: 0 0 var(--spacing-lg) 0;
    font-size: 1.1rem;
}

/* Advertisements */
.ad-banner {
    margin: var(--spacing-lg) 0;
    text-align: center;
}

.ad-placeholder {
    min-height: 90px;
    background-color: var(--bg-tertiary);
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

.ad-in-content {
    margin: var(--spacing-2xl) 0;
    text-align: center;
}

.ad-sticky-mobile {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-sm);
    z-index: var(--z-modal);
    display: none;
}

/* Layout */
.app-layout {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: var(--spacing-lg);
    margin: var(--spacing-2xl) 0;
}

/* Settings Panel */
.settings-panel {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    height: fit-content;
    position: sticky;
    top: var(--spacing-lg);
    transition: var(--transition-normal);
}

.settings-panel.hidden {
    display: none;
}

/* Floating Settings Button */
.floating-settings-btn {
    position: fixed !important;
    top: 20px !important;
    left: 20px !important;
    background-color: var(--button-primary-bg) !important;
    color: white !important;
    border: none !important;
    border-radius: 50% !important;
    width: 60px !important;
    height: 60px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    cursor: pointer !important;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3) !important;
    z-index: 9999 !important;
    transition: all 0.3s ease !important;
    font-size: 24px !important;
}

.floating-settings-btn:hover {
    background-color: var(--button-primary-hover) !important;
    transform: scale(1.1) !important;
}

.floating-settings-btn:focus {
    outline: 3px solid rgba(0, 123, 255, 0.5) !important;
    outline-offset: 2px !important;
}

.floating-settings-btn.hidden {
    display: none !important;
}

/* Layout when settings are hidden */
.app-layout.settings-hidden {
    grid-template-columns: 1fr;
}

.wheel-area.settings-hidden {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
}

.settings-header {
    background-color: var(--bg-tertiary);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
}

.settings-header h2 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
}

.settings-content {
    padding: var(--spacing-md);
    max-height: 70vh;
    overflow-y: auto;
}

.settings-section {
    margin-bottom: var(--spacing-lg);
}

.settings-section h3 {
    margin: 0 0 var(--spacing-md) 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Form Elements */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input[type="number"],
.form-group input[type="text"],
.form-group select {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-group input[type="number"]:focus,
.form-group input[type="text"]:focus,
.form-group select:focus {
    border-color: var(--button-primary-bg);
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
}

.form-group small {
    display: block;
    margin-top: var(--spacing-xs);
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

.form-group input[type="color"] {
    width: 100%;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
}

/* Toggle Switches */
.toggle-group {
    margin-bottom: var(--spacing-sm);
}

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

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

.toggle-slider {
    position: relative;
    width: 44px;
    height: 24px;
    background-color: var(--bg-tertiary);
    border-radius: 12px;
    margin-right: var(--spacing-sm);
    transition: var(--transition-fast);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    background-color: white;
    border-radius: 50%;
    top: 3px;
    left: 3px;
    transition: var(--transition-fast);
}

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

.toggle-label input[type="checkbox"]:checked + .toggle-slider::before {
    transform: translateX(20px);
}

/* Custom Colors */
.custom-colors {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.custom-colors.hidden {
    display: none;
}

/* Buttons */
.button {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
}

.button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.button-primary {
    background-color: var(--button-primary-bg);
    color: white;
}

.button-primary:hover:not(:disabled) {
    background-color: var(--button-primary-hover);
}

.button-secondary {
    background-color: var(--button-secondary-bg);
    color: white;
}

.button-secondary:hover:not(:disabled) {
    background-color: var(--button-secondary-hover);
}

.icon-button {
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    color: var(--text-primary);
}

.icon-button:hover {
    background-color: var(--bg-tertiary);
}

.icon-button:focus {
    outline: none;
    background-color: var(--bg-tertiary);
}

.icon {
    display: block;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.action-buttons .button {
    flex: 1;
}

/* Wheel Area */
.wheel-area {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.wheel-container {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    position: relative;
}

/* Canvas */
#wheel-canvas {
    width: 400px !important;
    height: 400px !important;
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
    object-fit: contain;
}

/* Force canvas to stay circular */
.wheel-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 450px;
}

.wheel-container #wheel-canvas {
    width: 400px !important;
    height: 400px !important;
    max-width: 90vw;
    max-height: 90vw;
    border-radius: 50%;
}

/* Confetti Animation */
.confetti-container {
    position: fixed;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
    z-index: 1200;
}

.confetti-piece {
    position: absolute;
    top: -10%;
    left: var(--confetti-left, 50%);
    width: 10px;
    height: 16px;
    border-radius: 2px;
    opacity: 0;
    transform: translate3d(0, -120%, 0) rotate(0deg) scale(var(--confetti-scale, 1));
}

.confetti-piece--animate {
    animation: confetti-fall var(--confetti-duration, 2s) ease-out var(--confetti-delay, 0s) forwards;
}

@keyframes confetti-fall {
    0% {
        opacity: 1;
        transform: translate3d(0, -120%, 0) rotate(0deg) scale(var(--confetti-scale, 1));
    }
    60% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translate3d(var(--confetti-horizontal, 0), 120vh, 0) rotate(var(--confetti-end-rotation, 360deg)) scale(var(--confetti-scale, 1));
    }
}

/* Result Overlay */
.result-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

.result-overlay.show {
    opacity: 1;
    visibility: visible;
}

.result-overlay.hidden {
    display: none;
}

.result-content {
    background-color: var(--bg-primary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.result-content h3 {
    margin: 0 0 var(--spacing-md) 0;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.result-number {
    font-size: 4rem;
    font-weight: 700;
    color: var(--button-primary-bg);
    margin: 0;
}

/* Spin Controls */
.spin-controls {
    margin-top: var(--spacing-lg);
}

/* Wheel help text below spin button */
.wheel-help-text {
    text-align: center;
    color: var(--text-tertiary);
    font-size: 0.875rem;
    margin-top: var(--spacing-sm);
}

#spin-btn {
    font-size: 1.25rem;
    padding: 1rem 2rem;
    min-width: 200px;
}

/* History Section */
.history-section {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.history-section h3 {
    margin: 0 0 var(--spacing-md) 0;
    font-size: 1.25rem;
    font-weight: 600;
}

.history-list {
    max-height: 200px;
    overflow-y: auto;
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background-color: var(--bg-primary);
}

.history-list:empty::after {
    content: "No results yet. Spin the wheel to get started!";
    display: block;
    padding: var(--spacing-md);
    text-align: center;
    color: var(--text-tertiary);
}

.history-item {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.history-item:last-child {
    border-bottom: none;
}

.history-number {
    font-weight: 600;
    color: var(--button-primary-bg);
}

.history-time {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.empty-history {
    padding: var(--spacing-md);
    text-align: center;
    color: var(--text-tertiary);
    margin: 0;
}

.history-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.history-actions .button {
    flex: 1;
    min-width: 100px;
}

/* SEO Content */
.seo-content {
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-2xl);
    border-top: 1px solid var(--border-color);
}

/* Table of Contents */
.toc {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.toc h2 {
    margin: 0 0 var(--spacing-md) 0;
    font-size: 1.5rem;
    font-weight: 600;
}

.toc ul {
    margin: 0;
    padding-left: var(--spacing-lg);
}

.toc li {
    margin-bottom: var(--spacing-xs);
}

.toc a {
    color: var(--button-primary-bg);
    text-decoration: none;
}

.toc a:hover {
    text-decoration: underline;
}

/* Content Sections */
.content-section {
    margin-bottom: var(--spacing-2xl);
}

.content-section h2 {
    margin: 0 0 var(--spacing-lg) 0;
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-primary);
}

.content-section h3 {
    margin: var(--spacing-lg) 0 var(--spacing-md) 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.content-section p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
    line-height: 1.8;
}

.content-section ol,
.content-section ul {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

.content-section li {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.content-section strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* FAQ */
.faq-list {
    display: grid;
    gap: var(--spacing-lg);
}

.faq-item {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
}

.faq-item h3 {
    margin: 0 0 var(--spacing-sm) 0;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.faq-item p {
    margin: 0;
    color: var(--text-secondary);
}

/* Footer */
footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-2xl) 0 0 0;
    margin-top: var(--spacing-2xl);
}


.footer-grid {
    display: grid;
    gap: var(--spacing-xl);
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.footer-column h3 {
    margin: 0 0 var(--spacing-sm) 0;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.footer-column p {
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--text-secondary);
    line-height: 1.6;
}

.footer-column a {
    color: var(--button-primary-bg);
    text-decoration: none;
}

.footer-column a:hover {
    text-decoration: underline;
}

.footer-meta {
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
}

.footer-bottom p {
    margin: 0;
    text-align: center;
    color: var(--text-tertiary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-layout {
        grid-template-columns: 1fr;
    }
    
    .settings-panel {
        position: relative;
        top: 0;
    }
    
    .ad-sticky-mobile {
        display: block;
    }
    
    header h1 {
        font-size: 1.5rem;
    }
    
    .tagline {
        font-size: 1rem;
    }
    
    .result-number {
        font-size: 3rem;
    }
    
    .history-actions {
        flex-direction: column;
    }
    
    .history-actions .button {
        width: 100%;
    }
    
    .footer-nav {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-sm);
    }
    
    .seo-content {
        margin-top: var(--spacing-lg);
        padding-top: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .settings-content {
        padding: var(--spacing-sm);
    }
    
    .wheel-container {
        padding: var(--spacing-md);
    }
    
    .result-content {
        padding: var(--spacing-lg);
    }
    
    .result-number {
        font-size: 2.5rem;
    }
    
    #spin-btn {
        font-size: 1rem;
        padding: 0.75rem 1.5rem;
        min-width: 150px;
    }
    
    .button {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }
}

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

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Animations */
@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

/* Fullscreen styles */
:fullscreen {
    background-color: var(--bg-primary);
}

:fullscreen .wheel-container {
    width: 100vw;
    height: 100vh;
    display: grid;
    place-items: center;
    border: none;
    border-radius: 0;
    background: var(--bg-primary);
    gap: var(--spacing-xl);
}

:fullscreen #wheel-canvas {
    max-width: 90vmin;
    max-height: 90vmin;
}

.fullscreen-active .app-layout {
    width: 100%;
    grid-template-columns: minmax(280px, 360px) 1fr;
    align-items: center;
    gap: var(--spacing-2xl);
    padding: var(--spacing-xl);
}

.fullscreen-active .app-layout.settings-hidden {
    grid-template-columns: 1fr;
    justify-items: center;
}

.fullscreen-active .wheel-area {
    width: 100%;
    max-width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xl);
}

.fullscreen-active .wheel-container {
    width: min(80vmin, 820px);
    max-width: min(80vmin, 820px);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
}

.fullscreen-active .app-layout.settings-hidden .wheel-container {
    width: min(90vmin, 880px);
    max-width: min(90vmin, 880px);
}

.fullscreen-active #wheel-canvas {
    width: 100% !important;
    height: auto !important;
}

.fullscreen-active .spin-controls {
    justify-content: center;
}

.fullscreen-active .spin-controls .button {
    font-size: 1.25rem;
    padding: 1rem 3rem;
}

.fullscreen-active .wheel-help-text {
    text-align: center;
}

#fullscreen-tip {
    position: fixed;
    top: 20px;
    right: 20px;
    background: rgba(0, 0, 0, 0.75);
    color: #fff;
    padding: 0.75rem 1.25rem;
    border-radius: 999px;
    font-size: 0.95rem;
    display: none;
    align-items: center;
    gap: 0.5rem;
    z-index: 2000;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
}

#fullscreen-tip .tip-key {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    padding: 0 0.5rem;
    height: 28px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.18);
    font-weight: 600;
    letter-spacing: 0.04em;
}

.fullscreen-active #fullscreen-tip {
    display: inline-flex;
}

/* Print Styles */
@media print {
    .settings-panel,
    .ad-banner,
    .ad-in-content,
    .ad-sticky-mobile,
    .spin-controls,
    .history-actions,
    .toc,
    footer {
        display: none !important;
    }
    
    .app-layout {
        grid-template-columns: 1fr;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
}
.ad-placeholder {
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
}

.ad-placeholder__content {
    text-align: center;
    color: var(--text-tertiary);
    font-size: 0.95rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.ad-placeholder__content h4 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.ad-placeholder__slot,
.ad-placeholder__note {
    margin: 0;
    line-height: 1.4;
}