:root {
    --border-dark: #3C2A21;
    --sky-gradient: linear-gradient(180deg, #60A5FA 0%, #BAE6FD 60%, #FEF08A 100%);
}

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

body {
    background: var(--sky-gradient);
    font-family: 'Quicksand', sans-serif;
    color: #3C2A21;
    min-height: 100vh;
    overflow: hidden;
    position: relative;
    user-select: none;
}

h1, .home-btn, .btn-listen, #score, .target-highlight, .balloon-letter {
    font-family: 'Fredoka One', cursive;
}

/* Sky Background Elements */
.sky-background {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 1;
}

.sun {
    position: absolute;
    top: 20px;
    right: 30px;
    font-size: 4rem;
}

.cloud {
    position: absolute;
    font-size: 3.5rem;
    opacity: 0.8;
}
.cloud-1 { top: 40px; left: -100px; animation: floatCloud 30s linear infinite; }
.cloud-2 { top: 120px; left: -150px; animation: floatCloud 45s linear infinite 5s; }

/* Main Container Layout */
.game-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 15px;
    height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 2;
}

header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 10px;
}

.home-btn {
    background: #FFF;
    color: #3C2A21;
    border: 3px solid var(--border-dark);
    border-radius: 12px;
    padding: 8px 14px;
    text-decoration: none;
    box-shadow: 0 4px 0 var(--border-dark);
    font-size: 0.95rem;
}
.home-btn:hover { background: #3C2A21; color: #FFF; }

.header-banner {
    text-align: center;
    flex-grow: 1;
}

.header-banner h1 {
    font-size: 1.8rem;
    color: #FF2E93;
    text-shadow: 2px 2px 0 #FFF;
}

.header-banner p {
    font-weight: 700;
    font-size: 0.95rem;
    color: #1E3A8A;
}

.score-board {
    background: #FEF08A;
    border: 3px solid var(--border-dark);
    border-radius: 14px;
    padding: 6px 14px;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 1.4rem;
    box-shadow: 0 4px 0 var(--border-dark);
}

.star-icon {
    font-size: 1.6rem;
    animation: starTwinkle 1.5s infinite alternate;
}

/* Prompt Banner */
.prompt-bar {
    background: #FFFFFF;
    border: 4px solid var(--border-dark);
    border-radius: 20px;
    padding: 10px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 6px 0 var(--border-dark);
    margin-bottom: 15px;
}

.btn-listen {
    background: #22C55E;
    color: #FFF;
    border: 2px solid var(--border-dark);
    border-radius: 10px;
    padding: 6px 16px;
    font-size: 1.1rem;
    cursor: pointer;
    box-shadow: 0 3px 0 var(--border-dark);
}
.btn-listen:active { transform: translateY(2px); box-shadow: 0 1px 0 var(--border-dark); }

.prompt-target {
    font-size: 1.3rem;
    font-weight: 700;
    color: #3C2A21;
}

.target-highlight {
    font-size: 2.2rem;
    color: #3B82F6;
    margin-left: 6px;
}

/* Floating Arena */
.balloon-arena {
    flex-grow: 1;
    position: relative;
    overflow: hidden;
    border-radius: 24px;
    border: 4px dashed rgba(255,255,255,0.7);
}

/* Interactive Balloons */
.balloon {
    position: absolute;
    width: 90px;
    height: 115px;
    border-radius: 50% 50% 50% 50% / 40% 40% 60% 60%;
    border: 3.5px solid var(--border-dark);
    box-shadow: inset 8px 8px 0 rgba(255,255,255,0.4), 0 6px 0 rgba(0,0,0,0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform 0.1s;
    animation: riseUp linear forwards;
}

.balloon::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-bottom: 8px solid var(--border-dark);
}

.balloon-letter {
    font-size: 2.4rem;
    color: #FFFFFF;
    text-shadow: 2px 2px 0 var(--border-dark);
}

/* Balloon Themes */
.b-red { background-color: #EF4444; }
.b-blue { background-color: #3B82F6; }
.b-green { background-color: #10B981; }
.b-yellow { background-color: #F59E0B; }
.b-purple { background-color: #8B5CF6; }
.b-pink { background-color: #EC4899; }

/* Popping Particles */
.pop-particle {
    position: absolute;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    pointer-events: none;
    animation: explode 0.6s ease-out forwards;
}

/* Animations */
@keyframes riseUp {
    0% { bottom: -120px; transform: rotate(0deg); }
    50% { transform: rotate(4deg) translateX(15px); }
    100% { bottom: 105%; transform: rotate(-4deg) translateX(-15px); }
}

@keyframes explode {
    0% { transform: translate(0, 0) scale(1); opacity: 1; }
    100% { transform: translate(var(--tx), var(--ty)) scale(0); opacity: 0; }
}

@keyframes floatCloud { 0% { transform: translateX(0); } 100% { transform: translateX(1100px); } }
@keyframes starTwinkle { 0% { transform: scale(1); } 100% { transform: scale(1.2) rotate(15deg); } }