:root {
    --nintendo-red: #e60012;
    --nintendo-blue: #00aeef;
    --nintendo-yellow: #fadb00;
    --nintendo-green: #00b140;
    --nintendo-pink: #ff69b4;
    --bg-color: #87ceeb; /* Sky blue background */
    --border-color: #2b2b2b;
    
    --font-heading: 'ZCOOL KuaiLe', cursive;
    --font-body: 'Nunito', 'Noto Sans SC', sans-serif;
}

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

body {
    font-family: var(--font-body);
    font-weight: 700;
    background-color: var(--bg-color);
    background-image: 
        radial-gradient(white 15%, transparent 16%),
        radial-gradient(white 15%, transparent 16%);
    background-size: 60px 60px;
    background-position: 0 0, 30px 30px;
    color: var(--border-color);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    letter-spacing: 1px;
}

/* Chunky UI Panel styling */
.glass-panel {
    background: white;
    border: 4px solid var(--border-color);
    border-radius: 24px;
    box-shadow: 8px 8px 0px var(--border-color);
    padding: 30px;
}

.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 5%;
    background: white;
    border-bottom: 4px solid var(--border-color);
    box-shadow: 0 6px 0px rgba(43, 43, 43, 0.2);
}

.logo {
    font-size: 1.8rem;
    color: var(--nintendo-red);
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-heading);
    text-shadow: 2px 2px 0px white, -1px -1px 0 var(--border-color), 1px -1px 0 var(--border-color), -1px 1px 0 var(--border-color), 1px 1px 0 var(--border-color);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 16px;
}

.nav-item {
    background: white;
    border: 3px solid var(--border-color);
    padding: 10px 24px;
    border-radius: 30px;
    cursor: pointer;
    font-weight: 800;
    color: var(--border-color);
    transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 4px 4px 0px var(--border-color);
    font-family: var(--font-heading);
    font-size: 1.1rem;
}

.nav-item:hover {
    background: #f0f0f0;
}

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

.nav-item.active {
    background: var(--nintendo-yellow);
    transform: translate(4px, 4px);
    box-shadow: 0px 0px 0px var(--border-color);
}

.app-container {
    padding-top: 80px;
    min-height: 100vh;
}

.stage-section {
    display: none;
    animation: popIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
    padding-bottom: 80px;
}

.stage-section.active {
    display: block;
}

@keyframes popIn {
    from { opacity: 0; transform: scale(0.95) translateY(20px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.hero {
    height: 45vh;
    min-height: 400px;
    background-size: cover;
    background-position: center;
    position: relative;
    display: flex;
    align-items: center;
    padding: 0 8%;
    margin-bottom: -40px;
    border-bottom: 6px solid var(--border-color);
}

.hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.15); /* Lighter overly for cartoon look */
}

.hero-content {
    position: relative;
    z-index: 10;
    color: white;
    max-width: 600px;
    animation: popIn 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

.age-badge {
    background: var(--nintendo-green);
    color: white;
    padding: 8px 24px;
    border-radius: 30px;
    font-size: 1.1rem;
    font-weight: 800;
    display: inline-block;
    margin-bottom: 16px;
    border: 3px solid var(--border-color);
    box-shadow: 4px 4px 0px var(--border-color);
    font-family: var(--font-heading);
    letter-spacing: 1px;
}

.hero-title {
    font-size: 4.5rem;
    margin-bottom: 12px;
    color: white;
    text-shadow: 
        4px 4px 0px var(--border-color),
        -2px -2px 0 var(--border-color),  
        2px -2px 0 var(--border-color),
        -2px  2px 0 var(--border-color),
        2px  2px 0 var(--border-color);
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 800;
    color: white;
    background: var(--nintendo-blue);
    padding: 8px 16px;
    border-radius: 12px;
    display: inline-block;
    border: 3px solid var(--border-color);
    box-shadow: 4px 4px 0px var(--border-color);
}

.content-wrapper {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 20;
}

.target-card {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-bottom: 40px;
    font-size: 1.2rem;
}

.icon-wrap {
    background: var(--nintendo-yellow);
    color: var(--border-color);
    width: 70px;
    height: 70px;
    border: 4px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.2rem;
    flex-shrink: 0;
    box-shadow: 4px 4px 0px var(--border-color);
}

.levels-container {
    display: flex;
    flex-direction: column;
    gap: 30px;
    margin-bottom: 50px;
}

.level-card {
    background: white;
    border: 4px solid var(--border-color);
    border-radius: 24px;
    box-shadow: 6px 6px 0px var(--border-color);
    overflow: hidden;
    transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.level-card:hover {
    transform: translateY(-4px) scale(1.01);
    box-shadow: 8px 10px 0px var(--border-color);
}

.level-card.open {
    transform: translateY(0) scale(1.0);
    box-shadow: 6px 6px 0px var(--border-color);
}

.level-header {
    padding: 24px 30px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: white;
    border-bottom: 0px solid var(--border-color);
    transition: background 0.2s ease;
}

.level-card.open .level-header {
    border-bottom: 4px dashed var(--border-color);
    background: #fff8dc;
}

.level-title {
    display: flex;
    align-items: center;
    gap: 16px;
}

.level-num {
    background: var(--nintendo-red);
    color: white;
    padding: 8px 16px;
    border-radius: 12px;
    font-weight: 800;
    font-size: 1.2rem;
    border: 3px solid var(--border-color);
    box-shadow: 3px 3px 0px var(--border-color);
    font-family: var(--font-heading);
}

.level-card:nth-child(2) .level-num { background: var(--nintendo-blue); }
.level-card:nth-child(3) .level-num { background: var(--nintendo-green); }

.level-title h3 {
    font-size: 1.6rem;
    color: var(--border-color);
}

.toggle-icon {
    font-size: 2rem;
    color: var(--border-color);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    background: var(--nintendo-yellow);
    border-radius: 50%;
    border: 3px solid var(--border-color);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 2px 2px 0px var(--border-color);
}

.level-card.open .toggle-icon {
    transform: rotate(180deg);
    background: var(--nintendo-red);
    color: white;
}

.level-body {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    background: #fafafa;
}

.level-card.open .level-body {
    grid-template-rows: 1fr;
}

.level-details-wrapper {
    overflow: hidden;
}

.level-meta {
    display: flex;
    gap: 24px;
    padding: 20px 30px;
    background: white;
    border-bottom: 4px solid var(--border-color);
    font-size: 1.1rem;
    font-weight: 800;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
    background: #eef2ff;
    padding: 6px 16px;
    border-radius: 20px;
    border: 2px solid var(--border-color);
}

.meta-item ion-icon {
    color: var(--nintendo-blue);
    font-size: 1.3rem;
}

.level-details {
    padding: 30px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

@media (max-width: 768px) {
    .level-details {
        grid-template-columns: 1fr;
    }
}

.detail-section h4 {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--border-color);
    margin-bottom: 20px;
    font-size: 1.4rem;
    background: var(--nintendo-yellow);
    padding: 8px 16px;
    border-radius: 12px;
    border: 3px solid var(--border-color);
    box-shadow: 3px 3px 0px var(--border-color);
    display: inline-flex;
}

.detail-section ul {
    list-style: none;
}

.detail-section ul li {
    position: relative;
    padding-left: 32px;
    margin-bottom: 16px;
    font-size: 1.1rem;
    color: var(--border-color);
    line-height: 1.5;
    background: white;
    padding: 12px 12px 12px 36px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 2px 2px 0px rgba(0,0,0,0.1);
}

.detail-section ul li::before {
    content: '★';
    position: absolute;
    left: 12px;
    top: 12px;
    color: var(--nintendo-red);
    font-size: 1.2rem;
    line-height: 1;
}

.advice-card {
    position: relative;
    overflow: hidden;
    background: #fff5e6;
}

.advice-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.advice-header ion-icon {
    font-size: 2.2rem;
    color: white;
    background: var(--nintendo-pink);
    padding: 8px;
    border-radius: 50%;
    border: 3px solid var(--border-color);
    box-shadow: 3px 3px 0px var(--border-color);
}

.advice-header h3 {
    font-size: 1.6rem;
    color: var(--border-color);
}

.advice-card p {
    font-size: 1.15rem;
    line-height: 1.8;
    background: white;
    padding: 20px;
    border-radius: 16px;
    border: 3px dashed var(--border-color);
}

@media (max-width: 768px) {
    .navbar {
        padding: 12px 5%;
    }
    .logo {
        font-size: 1.4rem;
    }
    .nav-links {
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        background: white;
        padding: 12px;
        border-top: 4px solid var(--border-color);
        box-shadow: 0 -4px 0px rgba(0,0,0,0.1);
        justify-content: space-around;
        gap: 0;
        z-index: 1000;
        flex-wrap: nowrap;
    }
    .nav-item {
        flex-direction: column;
        padding: 8px 12px;
        border-radius: 16px;
        gap: 4px;
        font-size: 0.85rem;
        box-shadow: 2px 2px 0px var(--border-color);
    }
    .nav-item ion-icon {
        font-size: 1.8rem;
    }
    .app-container {
        padding-bottom: 90px;
    }
    .hero {
        height: 40vh;
        min-height: 350px;
        padding: 0 5%;
    }
    .hero-title {
        font-size: 2.8rem;
    }
    .target-card {
        flex-direction: column;
        text-align: center;
        padding: 24px;
    }
    .level-header {
        padding: 20px;
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }
    .toggle-icon {
        position: absolute;
        right: 20px;
        top: 20px;
    }
    .level-meta {
        flex-direction: column;
        gap: 12px;
        padding: 16px 20px;
    }
}