* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    user-select: none;
}

body {
    font-family: 'Arial', sans-serif;
    min-height: 100vh;
    display: flex;
    margin: 0;
    padding: 0;
    gap: 0;
}

.fridge-container {
    flex: 1;
    position: relative;
    min-height: 100vh;
    height: 100vh;
    overflow: hidden;
    background-image: url('images/fridge.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.fridge {
    width: 100%;
    height: 100%;
    min-height: 100vh;
    position: relative;
    padding: 20px;
    display: grid;
    grid-template-columns: repeat(auto-fill, 40px);
    grid-template-rows: repeat(auto-fill, 30px);
    gap: 2px;
    align-content: start;
}

.word-tray-container {
    width: 350px;
    background: linear-gradient(145deg, #8B4513, #A0522D);
    background-image: 
        radial-gradient(circle at 25% 25%, rgba(139, 69, 19, 0.8) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(160, 82, 45, 0.8) 0%, transparent 50%),
        linear-gradient(90deg, rgba(101, 67, 33, 0.3) 0%, transparent 100%);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    height: 100vh;
    border-left: 4px solid #654321;
    box-shadow: 
        inset 0 0 20px rgba(0,0,0,0.3),
        inset -5px 0 10px rgba(0,0,0,0.2);
    position: relative;
}

.word-tray-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 2px,
            rgba(101, 67, 33, 0.1) 2px,
            rgba(101, 67, 33, 0.1) 4px
        ),
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 2px,
            rgba(101, 67, 33, 0.1) 2px,
            rgba(101, 67, 33, 0.1) 4px
        );
    pointer-events: none;
}

.tray-header {
    background: linear-gradient(135deg, #654321, #8B4513);
    color: #F5DEB3;
    padding: 20px 15px;
    text-align: center;
    border-bottom: 3px solid #4A2C17;
    box-shadow: 
        inset 0 2px 4px rgba(245, 222, 179, 0.2),
        0 2px 8px rgba(0,0,0,0.3);
    position: relative;
}

.tray-header::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: linear-gradient(90deg, transparent, #F5DEB3, transparent);
}

.tray-header h3 {
    margin-bottom: 12px;
    font-size: 1.3em;
    font-family: 'Georgia', serif;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    letter-spacing: 1px;
}

.shuffle-btn {
    background: linear-gradient(145deg, #D2B48C, #DEB887);
    border: 2px solid #8B7355;
    color: #4A2C17;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
    font-family: 'Georgia', serif;
    transition: all 0.3s ease;
    box-shadow: 
        0 3px 6px rgba(0,0,0,0.3),
        inset 0 1px 0 rgba(255,255,255,0.3);
    text-shadow: 0 1px 0 rgba(255,255,255,0.5);
}

.shuffle-btn:hover {
    background: linear-gradient(145deg, #DEB887, #F5DEB3);
    transform: translateY(-1px);
    box-shadow: 
        0 4px 8px rgba(0,0,0,0.4),
        inset 0 1px 0 rgba(255,255,255,0.4);
}

.shuffle-btn:active {
    transform: translateY(0);
    box-shadow: 
        0 2px 4px rgba(0,0,0,0.3),
        inset 0 1px 3px rgba(0,0,0,0.2);
}

.word-tray {
    flex: 1;
    padding: 20px 15px;
    overflow-y: auto;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-content: flex-start;
    background: 
        radial-gradient(circle at 30% 30%, rgba(139, 69, 19, 0.1) 0%, transparent 70%),
        radial-gradient(circle at 70% 70%, rgba(160, 82, 45, 0.1) 0%, transparent 70%);
}

.word-tray::-webkit-scrollbar {
    width: 8px;
}

.word-tray::-webkit-scrollbar-track {
    background: rgba(101, 67, 33, 0.2);
    border-radius: 4px;
}

.word-tray::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, #8B4513, #654321);
    border-radius: 4px;
    border: 1px solid #4A2C17;
}

.tray-footer {
    background: linear-gradient(135deg, #654321, #8B4513);
    padding: 15px;
    border-top: 3px solid #4A2C17;
    box-shadow: 
        inset 0 2px 4px rgba(245, 222, 179, 0.2),
        0 -2px 8px rgba(0,0,0,0.3);
    position: relative;
    display: flex;
    gap: 10px;
    justify-content: center;
}

.tray-footer::before {
    content: '';
    position: absolute;
    top: -3px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: linear-gradient(90deg, transparent, #F5DEB3, transparent);
}

.word-magnet {
    background: linear-gradient(145deg, #F5F5DC, #FFFACD);
    color: #2F1B14;
    padding: 8px 14px;
    border-radius: 3px;
    font-weight: 600;
    font-size: 14px;
    font-family: 'Kalam', 'Caveat', 'Dancing Script', cursive;
    cursor: grab;
    user-select: none;
    box-shadow: 
        0 3px 6px rgba(0,0,0,0.2),
        inset 0 1px 0 rgba(255,255,255,0.8),
        inset 0 -1px 0 rgba(0,0,0,0.1);
    transition: all 0.2s ease;
    position: relative;
    border: 1px solid #D2B48C;
    text-shadow: 0 1px 0 rgba(255,255,255,0.8);
    letter-spacing: 0.5px;
    transform: rotate(-0.5deg);
}

.word-magnet::before {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    right: 2px;
    bottom: 2px;
    background: linear-gradient(135deg, rgba(255,255,255,0.3), transparent);
    border-radius: 2px;
    pointer-events: none;
}

.word-magnet:hover {
    transform: translateY(-1px) rotate(0deg);
    box-shadow: 
        0 4px 8px rgba(0,0,0,0.25),
        inset 0 1px 0 rgba(255,255,255,0.9),
        inset 0 -1px 0 rgba(0,0,0,0.1);
    background: linear-gradient(145deg, #FFFACD, #FFF8DC);
}

.word-magnet:active {
    cursor: grabbing;
    transform: scale(1.02);
    box-shadow: 
        0 2px 4px rgba(0,0,0,0.3),
        inset 0 1px 2px rgba(0,0,0,0.1);
}

.word-magnet.on-fridge {
    position: absolute;
    z-index: 10;
}

.word-magnet.dragging {
    opacity: 0.9;
    transform: rotate(2deg) scale(1.05);
    z-index: 1000;
    box-shadow: 
        0 8px 16px rgba(0,0,0,0.3),
        inset 0 1px 0 rgba(255,255,255,0.9);
}

.fridge.drag-over {
    background-color: rgba(102, 126, 234, 0.1);
}

.save-btn, .reset-btn {
    background: linear-gradient(145deg, #8B4513, #A0522D);
    color: #F5DEB3;
    border: 2px solid #654321;
    padding: 10px 16px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: bold;
    font-family: 'Georgia', serif;
    cursor: pointer;
    box-shadow: 
        0 3px 6px rgba(0,0,0,0.3),
        inset 0 1px 0 rgba(245, 222, 179, 0.3);
    transition: all 0.3s ease;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
    flex: 1;
}

.save-btn:hover, .reset-btn:hover {
    transform: translateY(-1px);
    background: linear-gradient(145deg, #A0522D, #D2B48C);
    box-shadow: 
        0 4px 8px rgba(0,0,0,0.4),
        inset 0 1px 0 rgba(245, 222, 179, 0.4);
}

.save-btn:active, .reset-btn:active {
    transform: translateY(0);
    box-shadow: 
        0 2px 4px rgba(0,0,0,0.3),
        inset 0 1px 3px rgba(0,0,0,0.2);
}

.reset-btn {
    background: linear-gradient(145deg, #CD853F, #D2691E);
}

.reset-btn:hover {
    background: linear-gradient(145deg, #D2691E, #DEB887);
}

.instructions {
    position: absolute;
    top: 20px;
    left: 20px;
    background: rgba(47, 27, 20, 0.95);
    color: #F5DEB3;
    padding: 20px;
    border-radius: 12px;
    max-width: 320px;
    font-size: 14px;
    line-height: 1.5;
    z-index: 1000;
    border: 2px solid #8B4513;
    box-shadow: 
        0 8px 25px rgba(0,0,0,0.5),
        0 0 0 3px rgba(245, 222, 179, 0.1),
        inset 0 1px 0 rgba(245, 222, 179, 0.2);
    transform: scale(0.8) translateY(-20px);
    opacity: 0;
    transition: all 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    backdrop-filter: blur(5px);
}

.instructions.show {
    transform: scale(1) translateY(0);
    opacity: 1;
}

.instructions.hide {
    transform: scale(0.9) translateY(-30px);
    opacity: 0;
    pointer-events: none;
}

.instructions h4 {
    margin-bottom: 12px;
    color: #DEB887;
    font-family: 'Georgia', serif;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    gap: 8px;
}

.lightbulb {
    display: inline-block;
    font-size: 1.2em;
    animation: lightbulbGlow 2s ease-in-out infinite alternate;
    filter: drop-shadow(0 0 5px rgba(255, 215, 0, 0.7));
}

@keyframes lightbulbGlow {
    0% {
        filter: drop-shadow(0 0 5px rgba(255, 215, 0, 0.7)) brightness(1);
        transform: scale(1);
    }
    100% {
        filter: drop-shadow(0 0 15px rgba(255, 215, 0, 0.9)) brightness(1.2);
        transform: scale(1.05);
    }
}

@keyframes popIn {
    0% {
        transform: scale(0.3) translateY(-50px);
        opacity: 0;
    }
    50% {
        transform: scale(1.05) translateY(-5px);
        opacity: 0.8;
    }
    100% {
        transform: scale(1) translateY(0);
        opacity: 1;
    }
}

@keyframes popOut {
    0% {
        transform: scale(1) translateY(0);
        opacity: 1;
    }
    50% {
        transform: scale(0.95) translateY(-10px);
        opacity: 0.5;
    }
    100% {
        transform: scale(0.7) translateY(-30px);
        opacity: 0;
    }
}

.instructions.pop-in {
    animation: popIn 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55) forwards;
}

.instructions.pop-out {
    animation: popOut 0.6s cubic-bezier(0.55, 0.085, 0.68, 0.53) forwards;
}

.particle {
    position: absolute;
    pointer-events: none;
    z-index: 2000;
    border-radius: 50%;
}

.place-particle {
    background: radial-gradient(circle, #f0f0ef, #FFA500);
    box-shadow: 0 0 6px #FFD700;
    animation: placeParticle 0.8s ease-out forwards;
}

.remove-particle {
    background: radial-gradient(circle, #eeeeee, #acabab);
    box-shadow: 0 0 6px #2a2a2a;
    animation: removeParticle 0.8s ease-out forwards;
}

@keyframes placeParticle {
    0% {
        transform: scale(0) translate(0, 0) rotate(0deg);
        opacity: 1;
    }
    50% {
        transform: scale(1.2) translate(calc(var(--end-x) * 0.5), calc(var(--end-y) * 0.5)) rotate(180deg);
        opacity: 0.8;
    }
    100% {
        transform: scale(0.3) translate(var(--end-x), var(--end-y)) rotate(360deg);
        opacity: 0;
    }
}

@keyframes removeParticle {
    0% {
        transform: scale(1) translate(0, 0) rotate(0deg);
        opacity: 1;
    }
    50% {
        transform: scale(1.5) translate(calc(var(--end-x) * 0.5), calc(var(--end-y) * 0.5)) rotate(-180deg);
        opacity: 0.6;
    }
    100% {
        transform: scale(0) translate(var(--end-x), var(--end-y)) rotate(-360deg);
        opacity: 0;
    }
}

@media (max-width: 1024px) {
    .word-tray-container {
        width: 300px;
    }
    
    .tray-header h3 {
        font-size: 1.2em;
    }
    
    .shuffle-btn {
        padding: 6px 12px;
        font-size: 13px;
    }
    
    .instructions {
        max-width: 280px;
        font-size: 13px;
        padding: 16px;
    }
}

@media (max-width: 768px) {
    body {
        flex-direction: column;
    }
    
    .fridge-container {
        min-height: 60vh;
        height: 60vh;
        flex: 1;
    }
    
    .fridge {
        min-height: 60vh;
        height: 60vh;
        padding: 15px;
        grid-template-columns: repeat(auto-fill, 35px);
        grid-template-rows: repeat(auto-fill, 28px);
    }
    
    .word-tray-container {
        width: 100%;
        height: 40vh;
        flex: none;
    }
    
    .tray-header {
        padding: 15px 12px;
    }
    
    .tray-header h3 {
        font-size: 1.1em;
        margin-bottom: 8px;
    }
    
    .shuffle-btn {
        padding: 6px 12px;
        font-size: 12px;
    }
    
    .word-tray {
        padding: 15px 12px;
        gap: 8px;
    }
    
    .word-magnet {
        padding: 6px 10px;
        font-size: 13px;
    }
    
    .tray-footer {
        flex-direction: column;
        gap: 8px;
        padding: 12px;
    }
    
    .save-btn, .reset-btn {
        flex: none;
        padding: 8px 12px;
        font-size: 13px;
    }
    
    .instructions {
        top: 15px;
        left: 15px;
        max-width: calc(100vw - 30px);
        font-size: 12px;
        padding: 15px;
    }
}

@media (max-width: 480px) {
    .fridge-container {
        min-height: 55vh;
        height: 55vh;
    }
    
    .fridge {
        min-height: 55vh;
        height: 55vh;
        padding: 10px;
        grid-template-columns: repeat(auto-fill, 30px);
        grid-template-rows: repeat(auto-fill, 25px);
    }
    
    .word-tray-container {
        height: 45vh;
    }
    
    .tray-header {
        padding: 12px 10px;
    }
    
    .tray-header h3 {
        font-size: 1em;
        margin-bottom: 6px;
    }
    
    .shuffle-btn {
        padding: 5px 10px;
        font-size: 11px;
    }
    
    .word-tray {
        padding: 12px 10px;
        gap: 6px;
    }
    
    .word-magnet {
        padding: 5px 8px;
        font-size: 12px;
    }
    
    .tray-footer {
        padding: 10px;
        gap: 6px;
    }
    
    .save-btn, .reset-btn {
        padding: 6px 10px;
        font-size: 12px;
    }
    
    .instructions {
        top: 10px;
        left: 10px;
        max-width: calc(100vw - 20px);
        font-size: 11px;
        padding: 12px;
    }
    
    .instructions h4 {
        font-size: 13px;
        margin-bottom: 8px;
    }
}

@media (max-width: 320px) {
    .fridge {
        padding: 8px;
        grid-template-columns: repeat(auto-fill, 28px);
        grid-template-rows: repeat(auto-fill, 22px);
    }
    
    .word-magnet {
        padding: 4px 6px;
        font-size: 11px;
    }
    
    .tray-header h3 {
        font-size: 0.9em;
    }
    
    .shuffle-btn {
        padding: 4px 8px;
        font-size: 10px;
    }
    
    .save-btn, .reset-btn {
        padding: 5px 8px;
        font-size: 11px;
    }
    
    .instructions {
        font-size: 10px;
        padding: 10px;
    }
}

@media (max-width: 768px) and (orientation: landscape) {
    body {
        flex-direction: row;
    }
    
    .fridge-container {
        min-height: 100vh;
        height: 100vh;
        flex: 1;
    }
    
    .fridge {
        min-height: 100vh;
        height: 100vh;
    }
    
    .word-tray-container {
        width: 280px;
        height: 100vh;
    }
}

@media (min-width: 1200px) {
    .word-tray-container {
        width: 380px;
    }
    
    .tray-header h3 {
        font-size: 1.4em;
    }
    
    .shuffle-btn {
        padding: 10px 18px;
        font-size: 15px;
    }
    
    .word-magnet {
        padding: 9px 15px;
        font-size: 15px;
    }
    
    .save-btn, .reset-btn {
        padding: 12px 18px;
        font-size: 15px;
    }
    
    .instructions {
        max-width: 350px;
        font-size: 15px;
        padding: 22px;
    }
}