:root {
    --bg-color: #87CEEB;
    --primary: #FF5722;
    --primary-dark: #E64A19;
    --accent: #FFEB3B;
    --text-main: #333333;
    --text-light: #666666;
    --panel-bg: #FFFFFF;
    --border-color: #333333;
}

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

body {
    font-family: 'Nunito', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    position: relative;
    background-image: radial-gradient(circle at center, #A2D9F5 0%, #87CEEB 100%);
    user-select: none; /* Prevents text highlighting during rapid clicking */
}

.background-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.cloud {
    position: absolute;
    background: white;
    border-radius: 50px;
    border: 4px solid var(--border-color);
    box-shadow: 4px 4px 0 var(--border-color);
    animation: float-clouds linear infinite;
}

.cloud::before, .cloud::after {
    content: '';
    position: absolute;
    background: white;
    border: 4px solid var(--border-color);
    border-bottom: none;
    border-radius: 50%;
}

.cloud-1 {
    width: 120px;
    height: 40px;
    top: 15%;
    left: -150px;
    animation-duration: 35s;
}
.cloud-1::before { width: 50px; height: 50px; top: -25px; left: 15px; }
.cloud-1::after { width: 40px; height: 40px; top: -15px; right: 20px; }

.cloud-2 {
    width: 160px;
    height: 50px;
    top: 60%;
    left: -200px;
    animation-duration: 45s;
    animation-delay: -10s;
    transform: scale(0.8);
}
.cloud-2::before { width: 70px; height: 70px; top: -35px; left: 20px; }
.cloud-2::after { width: 50px; height: 50px; top: -20px; right: 25px; }

.cloud-3 {
    width: 100px;
    height: 35px;
    top: 30%;
    left: -120px;
    animation-duration: 25s;
    animation-delay: -15s;
    transform: scale(1.2);
}
.cloud-3::before { width: 45px; height: 45px; top: -20px; left: 10px; }
.cloud-3::after { width: 35px; height: 35px; top: -15px; right: 15px; }

@keyframes float-clouds {
    0% { transform: translateX(0); }
    100% { transform: translateX(110vw); }
}

.container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 800px;
    padding: 2rem;
}

.screen {
    display: none;
    flex-direction: column;
    align-items: center;
    text-align: center;
    opacity: 0;
    transform: scale(0.9);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.screen.active {
    display: flex;
    opacity: 1;
    transform: scale(1);
}

h1.title {
    font-family: 'Fredoka', sans-serif;
    font-size: 5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: white;
    -webkit-text-stroke: 4px var(--border-color);
    text-shadow: 6px 6px 0 var(--border-color);
    letter-spacing: 2px;
    transform: rotate(-2deg);
    animation: wiggle 3s infinite ease-in-out;
}

@keyframes wiggle {
    0%, 100% { transform: rotate(-2deg); }
    50% { transform: rotate(2deg); }
}

.subtitle {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--text-main);
    margin-bottom: 3rem;
    background: white;
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    border: 3px solid var(--border-color);
    box-shadow: 4px 4px 0 var(--border-color);
    transform: rotate(1deg);
}

.difficulty-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    width: 100%;
}

.diff-btn {
    background: var(--panel-bg);
    border: 4px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 20px;
    color: var(--text-main);
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    box-shadow: 6px 6px 0 var(--border-color);
    position: relative;
    top: 0;
    left: 0;
}

.diff-btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 8px 8px 0 var(--border-color);
    background: #FAFAFA;
}

.diff-btn:active {
    transform: translate(4px, 4px);
    box-shadow: 2px 2px 0 var(--border-color);
}

.diff-title {
    font-family: 'Fredoka', sans-serif;
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-main);
}

.diff-desc {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-light);
}

.diff-btn.impossible {
    background: #FFE0E0;
    border-color: #D32F2F;
    box-shadow: 6px 6px 0 #D32F2F;
}
.diff-btn.impossible:hover {
    box-shadow: 8px 8px 0 #D32F2F;
    background: #FFCDCD;
}
.diff-btn.impossible:active {
    box-shadow: 2px 2px 0 #D32F2F;
}
.diff-btn.impossible .diff-title {
    color: #D32F2F;
}

.game-ui {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    background: var(--panel-bg);
    border: 5px solid var(--border-color);
    padding: 3rem;
    border-radius: 30px;
    box-shadow: 10px 10px 0 var(--border-color);
    width: 100%;
}

.stats-container {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.timer, .cps-display {
    font-family: 'Nunito', sans-serif;
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--text-main);
    background: white;
    padding: 0.5rem 1rem;
    border-radius: 15px;
    border: 3px solid var(--border-color);
}

.cps-display {
    background: var(--accent);
    color: var(--border-color);
}

.clicks-remaining {
    font-family: 'Fredoka', sans-serif;
    color: var(--primary);
    font-size: 1.5rem;
    font-weight: 600;
    background: var(--accent);
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    border: 3px solid var(--border-color);
}

.number {
    font-family: 'Fredoka', sans-serif;
    font-size: 6rem;
    font-weight: 700;
    line-height: 1;
    word-break: break-all;
    color: var(--text-main);
    text-shadow: 4px 4px 0 #E0E0E0;
    transition: transform 0.1s ease, color 0.5s ease, text-shadow 0.5s ease;
}

.action-btn {
    background: var(--primary);
    color: white;
    border: 4px solid var(--border-color);
    padding: 1.5rem 4rem;
    font-size: 2rem;
    font-weight: 900;
    border-radius: 20px;
    cursor: pointer;
    font-family: 'Fredoka', sans-serif;
    transition: all 0.1s ease;
    box-shadow: 6px 6px 0 var(--border-color);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-top: 1rem;
}

.action-btn:hover {
    background: var(--primary-dark);
    transform: translate(-2px, -2px);
    box-shadow: 8px 8px 0 var(--border-color);
}

.action-btn:active {
    transform: translate(4px, 4px);
    box-shadow: 2px 2px 0 var(--border-color);
}

.secondary-btn {
    background: transparent;
    color: var(--text-light);
    border: none;
    font-size: 1.2rem;
    font-weight: 700;
    cursor: pointer;
    font-family: 'Nunito', sans-serif;
    transition: all 0.2s ease;
    margin-top: 1rem;
    text-decoration: underline;
    text-decoration-thickness: 3px;
    text-underline-offset: 4px;
}

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

.victory-title {
    font-family: 'Fredoka', sans-serif;
    font-size: 4rem;
    color: var(--accent);
    margin-bottom: 1rem;
    -webkit-text-stroke: 3px var(--border-color);
    text-shadow: 6px 6px 0 var(--border-color);
    transform: rotate(-3deg);
    animation: bounce 1s infinite alternate;
}

@keyframes bounce {
    0% { transform: rotate(-3deg) translateY(0); }
    100% { transform: rotate(-3deg) translateY(-20px); }
}

#victory-message {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 3rem;
    color: var(--text-main);
    background: white;
    padding: 1rem 2rem;
    border-radius: 20px;
    border: 4px solid var(--border-color);
    box-shadow: 5px 5px 0 var(--border-color);
}

@media (max-width: 600px) {
    .difficulty-grid {
        grid-template-columns: 1fr;
    }
    
    h1.title {
        font-size: 3.5rem;
    }
    
    .number {
        font-size: 4rem;
    }
}

.particle {
    position: absolute;
    font-family: 'Fredoka', sans-serif;
    font-size: 2rem;
    font-weight: 700;
    color: #FF5722;
    text-shadow: 2px 2px 0 var(--border-color);
    pointer-events: none;
    z-index: 100;
    animation: pop-out 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

@keyframes pop-out {
    0% {
        transform: translate(-50%, -50%) scale(0.5);
        opacity: 1;
    }
    50% {
        transform: translate(var(--tx), var(--ty)) scale(1.2) rotate(var(--rot));
        opacity: 1;
    }
    100% {
        transform: translate(var(--tx), calc(var(--ty) + 100px)) scale(1) rotate(var(--rot));
        opacity: 0;
    }
}

.number.flaming {
    color: #FFF59D;
    text-shadow: 
        0 -5px 10px #FFEB3B,
        3px -10px 15px #FF9800,
        -3px -15px 20px #F44336,
        4px 4px 0 #333;
    animation: flame-flicker 0.1s infinite alternate;
}

@keyframes flame-flicker {
    0% { 
        text-shadow: 
            0 -5px 10px #FFEB3B,
            3px -10px 15px #FF9800,
            -3px -15px 20px #F44336,
            4px 4px 0 #333;
    }
    100% { 
        text-shadow: 
            0 -8px 15px #FFEB3B,
            -3px -12px 20px #FF9800,
            3px -18px 25px #F44336,
            4px 4px 0 #333;
    }
}