/**
 * RÉSOLUTIONS ARCADE 2025
 * ========================
 * Style rétro arcade avec effets néon et CRT
 * 
 * Table of Contents:
 * 1. CSS Custom Properties (Variables)
 * 2. Reset & Base
 * 3. Typography
 * 4. Layout
 * 5. Components
 *    5.1 Buttons
 *    5.2 Forms
 *    5.3 Panels
 *    5.4 Cards
 *    5.5 Overlays & Modals
 * 6. Effects & Decorations
 * 7. Animations
 * 8. Utilities
 * 9. Media Queries
 */

/* ==========================================================================
   1. CSS Custom Properties (Variables)
   ========================================================================== */

:root {
    /* Color Palette - Neon */
    --color-neon-pink: #ff00ff;
    --color-neon-cyan: #00ffff;
    --color-neon-yellow: #ffff00;
    --color-neon-green: #00ff00;
    --color-neon-orange: #ff6600;
    
    /* Color Palette - Arcade */
    --color-arcade-red: #ff0040;
    --color-arcade-blue: #0080ff;
    
    /* Background Colors */
    --color-bg-dark: #0a0a12;
    --color-bg-panel: #1a1a2e;
    --color-bg-input: #0d0d1a;
    --color-bg-card: linear-gradient(135deg, #1e1e3f 0%, #0d0d1a 100%);
    
    /* Text Colors */
    --color-text-primary: #ffffff;
    --color-text-secondary: #aaaaaa;
    --color-text-muted: #666666;
    
    /* Shadows & Glows */
    --glow-pink: 0 0 10px var(--color-neon-pink), 0 0 20px var(--color-neon-pink);
    --glow-cyan: 0 0 10px var(--color-neon-cyan), 0 0 20px var(--color-neon-cyan);
    --glow-yellow: 0 0 10px var(--color-neon-yellow), 0 0 20px var(--color-neon-yellow);
    --glow-green: 0 0 10px var(--color-neon-green), 0 0 20px var(--color-neon-green);
    
    /* Spacing */
    --spacing-xs: 5px;
    --spacing-sm: 10px;
    --spacing-md: 15px;
    --spacing-lg: 20px;
    --spacing-xl: 25px;
    --spacing-xxl: 30px;
    
    /* Border Radius */
    --radius-sm: 5px;
    --radius-md: 10px;
    --radius-full: 50px;
    
    /* Transitions */
    --transition-fast: 0.1s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Z-index layers */
    --z-stars: 0;
    --z-content: 1;
    --z-hud: 100;
    --z-scanlines: 1000;
    --z-particles: 1500;
    --z-overlay: 2000;
    
    /* Font sizes */
    --font-size-xs: 0.4rem;
    --font-size-sm: 0.5rem;
    --font-size-md: 0.6rem;
    --font-size-lg: 0.7rem;
    --font-size-xl: 0.8rem;
    --font-size-title: clamp(1rem, 4vw, 2rem);
}

/* ==========================================================================
   2. Reset & Base
   ========================================================================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Press Start 2P', cursive;
    background: var(--color-bg-dark);
    color: var(--color-text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
}

/* Focus visible for accessibility */
:focus-visible {
    outline: 2px solid var(--color-neon-cyan);
    outline-offset: 2px;
}

/* ==========================================================================
   3. Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
}

/* ==========================================================================
   4. Layout
   ========================================================================== */

.container {
    position: relative;
    z-index: var(--z-content);
    max-width: 1100px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* Header */
.header {
    text-align: center;
    padding: var(--spacing-xxl) 0;
    margin-bottom: var(--spacing-xxl);
}

.header__title {
    font-size: var(--font-size-title);
    color: var(--color-neon-yellow);
    text-shadow: 
        0 0 10px var(--color-neon-yellow),
        0 0 20px var(--color-neon-yellow),
        0 0 40px var(--color-neon-orange),
        0 0 80px var(--color-neon-orange);
    animation: flicker 3s infinite;
    margin-bottom: var(--spacing-md);
}

.header__subtitle {
    font-size: var(--font-size-md);
    color: var(--color-neon-cyan);
    text-shadow: var(--glow-cyan);
    animation: blink 1s infinite;
}

.header__credits {
    font-size: var(--font-size-sm);
    color: var(--color-neon-green);
    margin-top: var(--spacing-md);
    text-shadow: 0 0 5px var(--color-neon-green);
}

/* Footer */
.footer {
    text-align: center;
    padding: var(--spacing-xxl);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.footer a {
    color: var(--color-neon-pink);
    text-decoration: none;
}

/* ==========================================================================
   5. Components
   ========================================================================== */

/* --------------------------------------------------------------------------
   5.1 Buttons
   -------------------------------------------------------------------------- */

.btn {
    font-family: 'Press Start 2P', cursive;
    font-size: var(--font-size-lg);
    padding: var(--spacing-md) var(--spacing-xxl);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    position: relative;
    transition: all var(--transition-fast);
    text-transform: uppercase;
    white-space: nowrap;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: inherit;
    filter: blur(10px);
    opacity: 0.5;
    z-index: -1;
}

.btn:active {
    transform: translateY(3px);
}

/* Button variants */
.btn--add {
    width: 100%;
    margin-top: var(--spacing-sm);
    background: linear-gradient(180deg, #00ff00 0%, #008800 100%);
    color: #003300;
    box-shadow: 
        0 6px 0 #005500,
        0 0 20px rgba(0, 255, 0, 0.5);
}

.btn--add:hover {
    background: linear-gradient(180deg, #44ff44 0%, #00aa00 100%);
    transform: translateY(-2px);
    box-shadow: 
        0 8px 0 #005500,
        0 0 30px rgba(0, 255, 0, 0.7);
}

.btn--add:active {
    transform: translateY(4px);
    box-shadow: 
        0 2px 0 #005500,
        0 0 10px rgba(0, 255, 0, 0.3);
}

.btn--small {
    font-size: var(--font-size-sm);
    padding: var(--spacing-sm) var(--spacing-md);
}

.btn--delete {
    background: linear-gradient(180deg, #ff0040 0%, #880022 100%);
    color: var(--color-text-primary);
    box-shadow: 
        0 4px 0 #550011,
        0 0 15px rgba(255, 0, 64, 0.5);
}

.btn--delete:hover {
    background: linear-gradient(180deg, #ff4466 0%, #aa0033 100%);
}

.btn--edit {
    background: linear-gradient(180deg, #ffff00 0%, #888800 100%);
    color: #333300;
    box-shadow: 
        0 4px 0 #555500,
        0 0 15px rgba(255, 255, 0, 0.5);
}

.btn--edit:hover {
    background: linear-gradient(180deg, #ffff44 0%, #aaaa00 100%);
}

.btn--complete {
    background: linear-gradient(180deg, #00ffff 0%, #008888 100%);
    color: #003333;
    box-shadow: 
        0 4px 0 #005555,
        0 0 15px rgba(0, 255, 255, 0.5);
}

.btn--complete:hover {
    background: linear-gradient(180deg, #44ffff 0%, #00aaaa 100%);
}

.btn--cancel {
    background: linear-gradient(180deg, #666666 0%, #333333 100%);
    color: var(--color-text-primary);
    box-shadow: 0 4px 0 #222222;
    flex: 1;
}

.btn--save {
    background: linear-gradient(180deg, #00ff00 0%, #008800 100%);
    color: #003300;
    box-shadow: 0 4px 0 #005500;
    flex: 1;
}

/* --------------------------------------------------------------------------
   5.2 Forms
   -------------------------------------------------------------------------- */

.form__group {
    margin-bottom: var(--spacing-md);
}

.form__label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-neon-cyan);
    margin-bottom: var(--spacing-sm);
    text-shadow: 0 0 5px var(--color-neon-cyan);
}

.form__input {
    width: 100%;
    padding: 12px;
    font-family: 'Press Start 2P', cursive;
    font-size: var(--font-size-md);
    background: var(--color-bg-input);
    border: 3px solid var(--color-neon-cyan);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    outline: none;
    transition: all var(--transition-normal);
}

.form__input:focus {
    border-color: var(--color-neon-yellow);
    box-shadow: var(--glow-yellow);
}

.form__input--textarea {
    min-height: 80px;
    resize: vertical;
}

.form__input--invalid {
    border-color: var(--color-arcade-red);
}

.form__error {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-arcade-red);
    margin-top: var(--spacing-xs);
    min-height: 1.2em;
}

.form__row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

/* --------------------------------------------------------------------------
   5.3 Panels
   -------------------------------------------------------------------------- */

.panel {
    background: var(--color-bg-panel);
    border: 4px solid;
    border-radius: var(--radius-md);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xxl);
}

.panel--form {
    border-color: var(--color-neon-pink);
    box-shadow: 
        0 0 20px var(--color-neon-pink),
        inset 0 0 20px rgba(255, 0, 255, 0.1);
}

.panel--list {
    border-color: var(--color-neon-cyan);
    box-shadow: 
        0 0 20px var(--color-neon-cyan),
        inset 0 0 20px rgba(0, 255, 255, 0.1);
}

.panel__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.panel__title {
    font-size: var(--font-size-xl);
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.panel__title--pink {
    color: var(--color-neon-pink);
    text-shadow: var(--glow-pink);
}

.panel__title--cyan {
    color: var(--color-neon-cyan);
    text-shadow: var(--glow-cyan);
    margin-bottom: 0;
}

.panel__score {
    font-size: var(--font-size-md);
    color: var(--color-neon-yellow);
    text-shadow: 0 0 5px var(--color-neon-yellow);
}

/* --------------------------------------------------------------------------
   5.4 Cards (Resolution Cards)
   -------------------------------------------------------------------------- */

.resolution-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.resolution-card {
    background: var(--color-bg-card);
    border: 3px solid var(--color-neon-green);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
    animation: slideIn var(--transition-slow) ease-out;
}

.resolution-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.1),
        transparent
    );
    transition: var(--transition-slow);
}

.resolution-card:hover::before {
    left: 100%;
}

.resolution-card:hover {
    transform: scale(1.02);
    box-shadow: 0 0 30px var(--color-neon-green);
}

.resolution-card--completed {
    border-color: var(--color-neon-yellow);
    opacity: 0.7;
}

.resolution-card__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.resolution-card__title {
    font-size: var(--font-size-lg);
    color: var(--color-neon-pink);
    text-shadow: 0 0 5px var(--color-neon-pink);
}

.resolution-card__title--completed::after {
    content: ' ★ ACCOMPLI! ★';
    color: var(--color-neon-yellow);
    font-size: var(--font-size-xs);
}

.resolution-card__deadline {
    font-size: var(--font-size-sm);
    color: var(--color-neon-orange);
    background: rgba(255, 102, 0, 0.2);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-neon-orange);
}

.resolution-card__deadline--urgent {
    animation: blink 0.5s infinite;
}

.resolution-card__description {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.resolution-card__actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* Progress Bar */
.progress {
    margin-bottom: var(--spacing-md);
}

.progress__bar {
    height: 20px;
    background: var(--color-bg-input);
    border: 2px solid var(--color-neon-cyan);
    border-radius: var(--radius-md);
    overflow: hidden;
    position: relative;
}

.progress__fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-neon-green), var(--color-neon-cyan));
    transition: width var(--transition-slow);
    position: relative;
}

.progress__fill::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.3) 50%,
        transparent 100%
    );
    animation: shimmer 2s infinite;
}

.progress__text {
    font-size: var(--font-size-xs);
    color: var(--color-neon-cyan);
    text-align: center;
    margin-top: var(--spacing-xs);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 40px;
    color: var(--color-neon-pink);
    font-size: var(--font-size-md);
}

.empty-state__icon {
    font-size: 2rem;
    animation: bounce 1s infinite;
    display: block;
    margin-bottom: var(--spacing-lg);
}

/* --------------------------------------------------------------------------
   5.5 Overlays & Modals
   -------------------------------------------------------------------------- */

.overlay {
    position: fixed;
    inset: 0;
    display: none;
    justify-content: center;
    align-items: center;
    z-index: var(--z-overlay);
}

.overlay.is-visible {
    display: flex;
    animation: fadeIn var(--transition-normal);
}

.overlay--victory {
    background: rgba(0, 0, 0, 0.8);
}

.overlay--modal {
    background: rgba(0, 0, 0, 0.9);
    padding: var(--spacing-lg);
}

.overlay__content {
    text-align: center;
    animation: zoomIn var(--transition-slow);
}

.overlay__title {
    font-size: 1.5rem;
    color: var(--color-neon-yellow);
    text-shadow: 
        0 0 20px var(--color-neon-yellow),
        0 0 40px var(--color-neon-orange);
    margin-bottom: var(--spacing-lg);
}

.overlay__subtitle {
    font-size: var(--font-size-md);
    color: var(--color-neon-cyan);
}

/* Modal */
.modal {
    background: var(--color-bg-panel);
    border: 4px solid var(--color-neon-yellow);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl);
    max-width: 500px;
    width: 100%;
    box-shadow: 0 0 30px var(--color-neon-yellow);
    animation: zoomIn var(--transition-slow);
}

.modal__title {
    font-size: var(--font-size-xl);
    color: var(--color-neon-yellow);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    text-shadow: var(--glow-yellow);
}

.modal__actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

/* ==========================================================================
   6. Effects & Decorations
   ========================================================================== */

/* Stars Background */
.stars {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: var(--z-stars);
}

.star {
    position: absolute;
    background: var(--color-text-primary);
    border-radius: 50%;
    animation: twinkle 2s infinite;
}

/* CRT Scanlines */
.scanlines {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: var(--z-scanlines);
    background: repeating-linear-gradient(
        0deg,
        rgba(0, 0, 0, 0.1) 0px,
        rgba(0, 0, 0, 0.1) 1px,
        transparent 1px,
        transparent 2px
    );
}

/* HUD */
.hud {
    position: fixed;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    z-index: var(--z-hud);
}

.hud__score {
    background: var(--color-bg-panel);
    border: 2px solid var(--color-neon-yellow);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    color: var(--color-neon-yellow);
}

/* Decorative Joystick */
.joystick {
    position: fixed;
    bottom: var(--spacing-lg);
    left: var(--spacing-lg);
    width: 60px;
    height: 60px;
    background: radial-gradient(circle, #ff0000 0%, #880000 100%);
    border-radius: 50%;
    border: 3px solid #aa0000;
    box-shadow: 
        0 5px 0 #550000,
        0 0 20px rgba(255, 0, 0, 0.5);
    animation: wobble 3s infinite;
    z-index: var(--z-hud);
}

/* Particles */
.particle {
    position: fixed;
    pointer-events: none;
    z-index: var(--z-particles);
    font-size: 1.5rem;
    animation: fall 2s forwards;
}

/* ==========================================================================
   7. Animations
   ========================================================================== */

@keyframes flicker {
    0%, 19.999%, 22%, 62.999%, 64%, 64.999%, 70%, 100% {
        opacity: 1;
    }
    20%, 21.999%, 63%, 63.999%, 65%, 69.999% {
        opacity: 0.6;
    }
}

@keyframes blink {
    50% { opacity: 0; }
}

@keyframes twinkle {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes zoomIn {
    from { transform: scale(0); }
    to { transform: scale(1); }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

@keyframes wobble {
    0%, 100% { transform: rotate(-5deg); }
    50% { transform: rotate(5deg); }
}

@keyframes fall {
    0% {
        opacity: 1;
        transform: translateY(0) rotate(0deg);
    }
    100% {
        opacity: 0;
        transform: translateY(100vh) rotate(720deg);
    }
}

@keyframes rainbow {
    0% { filter: hue-rotate(0deg); }
    100% { filter: hue-rotate(360deg); }
}

/* --------------------------------------------------------------------------
   5.6 Fun Buttons
   -------------------------------------------------------------------------- */

.fun-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xxl);
}

.btn--fun {
    font-size: var(--font-size-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    animation: pulse 2s infinite;
}

.btn--fun-1 {
    background: linear-gradient(180deg, #ff6b6b 0%, #c92a2a 100%);
    color: white;
    box-shadow: 0 4px 0 #862020, 0 0 15px rgba(255, 107, 107, 0.5);
    animation-delay: 0s;
}

.btn--fun-2 {
    background: linear-gradient(180deg, #9775fa 0%, #5f3dc4 100%);
    color: white;
    box-shadow: 0 4px 0 #3c2a7d, 0 0 15px rgba(151, 117, 250, 0.5);
    animation-delay: 0.5s;
}

.btn--fun-3 {
    background: linear-gradient(180deg, #ffd43b 0%, #e67700 100%);
    color: #333;
    box-shadow: 0 4px 0 #a35400, 0 0 15px rgba(255, 212, 59, 0.5);
    animation-delay: 1s;
}

.btn--fun-4 {
    background: linear-gradient(180deg, #69db7c 0%, #2f9e44 100%);
    color: #1a3d1f;
    box-shadow: 0 4px 0 #1f6d2d, 0 0 15px rgba(105, 219, 124, 0.5);
    animation-delay: 1.5s;
}

.btn--fun:hover {
    transform: translateY(-3px) scale(1.05);
    animation: none;
}

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

/* --------------------------------------------------------------------------
   5.7 Flip Button (Mode Switcher)
   -------------------------------------------------------------------------- */

.flip-button {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: var(--z-hud);
    
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    
    padding: var(--spacing-md);
    background: linear-gradient(180deg, #ff00ff 0%, #8b008b 100%);
    border: 4px solid #ff66ff;
    border-radius: var(--radius-md);
    
    font-family: 'Press Start 2P', cursive;
    font-size: var(--font-size-xs);
    color: white;
    text-shadow: 0 0 5px black;
    
    cursor: pointer;
    transition: all var(--transition-normal);
    
    box-shadow: 
        0 6px 0 #550055,
        0 0 30px rgba(255, 0, 255, 0.6);
    
    animation: flipPulse 3s infinite;
}

.flip-button__icon {
    font-size: 1.5rem;
    animation: shake 0.5s infinite;
}

.flip-button:hover {
    transform: translateY(-5px) scale(1.1);
    box-shadow: 
        0 10px 0 #550055,
        0 0 50px rgba(255, 0, 255, 0.8);
    animation: none;
}

.flip-button:active {
    transform: translateY(3px);
    box-shadow: 
        0 2px 0 #550055,
        0 0 20px rgba(255, 0, 255, 0.4);
}

@keyframes flipPulse {
    0%, 100% { 
        box-shadow: 0 6px 0 #550055, 0 0 30px rgba(255, 0, 255, 0.6);
    }
    50% { 
        box-shadow: 0 6px 0 #550055, 0 0 50px rgba(255, 0, 255, 0.9);
    }
}

@keyframes shake {
    0%, 100% { transform: rotate(-5deg); }
    50% { transform: rotate(5deg); }
}

/* --------------------------------------------------------------------------
   5.8 Pong Game
   -------------------------------------------------------------------------- */

.mode-container {
    transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.mode-container.is-hidden {
    display: none;
}

.header--pong {
    margin-bottom: var(--spacing-lg);
}

.header__title--pong {
    color: var(--color-neon-cyan);
    text-shadow: 
        0 0 10px var(--color-neon-cyan),
        0 0 20px var(--color-neon-cyan),
        0 0 40px var(--color-neon-pink),
        0 0 80px var(--color-neon-pink);
}

.pong-container {
    position: relative;
    background: linear-gradient(135deg, #0d0d1a 0%, #1a1a2e 50%, #0d0d1a 100%);
    border: 4px solid var(--color-neon-green);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    box-shadow: 
        0 0 30px var(--color-neon-green),
        0 0 60px rgba(0, 255, 0, 0.3),
        inset 0 0 30px rgba(0, 255, 0, 0.1);
    
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 400px;
}

/* Pong Start Overlay */
.pong-start-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(0, 0, 0, 0.8);
    border-radius: var(--radius-md);
    z-index: 10;
    animation: fadeIn var(--transition-normal);
}

.pong-start-overlay.is-hidden {
    display: none;
}

.btn--pong-start {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    
    padding: var(--spacing-xxl) 60px;
    background: linear-gradient(180deg, #00ff00 0%, #008800 100%);
    border: 4px solid #44ff44;
    border-radius: var(--radius-md);
    
    color: #003300;
    cursor: pointer;
    
    box-shadow: 
        0 8px 0 #005500,
        0 0 40px rgba(0, 255, 0, 0.6),
        0 0 80px rgba(0, 255, 0, 0.3);
    
    transition: all var(--transition-fast);
    animation: pongPulse 1.5s infinite;
}

.btn--pong-start:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 
        0 12px 0 #005500,
        0 0 60px rgba(0, 255, 0, 0.8),
        0 0 100px rgba(0, 255, 0, 0.5);
    animation: none;
}

.btn--pong-start:active {
    transform: translateY(4px);
    box-shadow: 
        0 2px 0 #005500,
        0 0 20px rgba(0, 255, 0, 0.4);
}

.pong-start__icon {
    font-size: 3rem;
    text-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

.pong-start__text {
    font-family: 'Press Start 2P', cursive;
    font-size: var(--font-size-xl);
    text-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

@keyframes pongPulse {
    0%, 100% { 
        transform: scale(1);
        box-shadow: 0 8px 0 #005500, 0 0 40px rgba(0, 255, 0, 0.6);
    }
    50% { 
        transform: scale(1.05);
        box-shadow: 0 8px 0 #005500, 0 0 60px rgba(0, 255, 0, 0.9);
    }
}

.pong-canvas {
    display: block;
    width: 100%;
    max-width: 1000px;
    height: auto;
    border-radius: var(--radius-sm);
    box-shadow: 
        0 0 20px var(--color-neon-cyan),
        0 0 40px var(--color-neon-pink),
        inset 0 0 30px rgba(0, 0, 0, 0.5);
}

.pong-instructions {
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 2.5;
}

.pong-instructions kbd {
    display: inline-block;
    padding: 4px 8px;
    background: var(--color-bg-input);
    border: 2px solid var(--color-neon-cyan);
    border-radius: var(--radius-sm);
    color: var(--color-neon-cyan);
    font-family: 'Press Start 2P', cursive;
    font-size: var(--font-size-xs);
}

/* --------------------------------------------------------------------------
   5.9 Funny Message Overlay
   -------------------------------------------------------------------------- */

.overlay--funny {
    background: rgba(0, 0, 0, 0.85);
    cursor: pointer;
}

.funny-bubble {
    position: relative;
    max-width: 90%;
    width: 500px;
    padding: var(--spacing-xxl);
    background: linear-gradient(135deg, #2d1f4e 0%, #1a1a2e 100%);
    border: 4px solid var(--color-neon-pink);
    border-radius: var(--radius-md);
    box-shadow: 
        0 0 30px var(--color-neon-pink),
        0 0 60px rgba(255, 0, 255, 0.3);
    animation: bubbleIn 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.funny-bubble__content {
    font-size: var(--font-size-md);
    color: var(--color-neon-yellow);
    text-align: center;
    line-height: 2;
    text-shadow: 0 0 10px var(--color-neon-yellow);
}

.funny-bubble__close {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    
    width: 30px;
    height: 30px;
    
    background: var(--color-arcade-red);
    border: 2px solid #ff6666;
    border-radius: 50%;
    
    font-size: 1rem;
    color: white;
    cursor: pointer;
    
    display: flex;
    align-items: center;
    justify-content: center;
    
    transition: all var(--transition-fast);
}

.funny-bubble__close:hover {
    transform: scale(1.2) rotate(90deg);
    background: #ff4444;
}

@keyframes bubbleIn {
    0% {
        opacity: 0;
        transform: scale(0.3) rotate(-10deg);
    }
    50% {
        transform: scale(1.1) rotate(2deg);
    }
    100% {
        opacity: 1;
        transform: scale(1) rotate(0deg);
    }
}

/* ==========================================================================
   8. Utilities
   ========================================================================== */

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

.is-hidden {
    display: none !important;
}

/* ==========================================================================
   9. Media Queries
   ========================================================================== */

@media (max-width: 600px) {
    .form__row {
        grid-template-columns: 1fr;
    }
    
    .joystick,
    .hud {
        display: none;
    }
    
    .panel {
        padding: var(--spacing-md);
    }
    
    .resolution-card__header {
        flex-direction: column;
    }
    
    .resolution-card__actions {
        justify-content: center;
    }
    
    .modal__actions {
        flex-direction: column;
    }
    
    .flip-button {
        bottom: var(--spacing-sm);
        right: var(--spacing-sm);
        padding: var(--spacing-sm);
    }
    
    .flip-button__icon {
        font-size: 1.2rem;
    }
    
    .flip-button__text {
        font-size: 0.35rem;
    }
    
    .fun-buttons {
        gap: var(--spacing-xs);
    }
    
    .btn--fun {
        font-size: 0.4rem;
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .pong-instructions {
        font-size: var(--font-size-xs);
    }
    
    .funny-bubble {
        padding: var(--spacing-lg);
    }
    
    .funny-bubble__content {
        font-size: var(--font-size-sm);
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}