:root {
    --bg-main: #FFFBF0;
    --text-black: #2A2420;
    --surface-white: #FFFFFF;
    
    /* 카드 색상 */
    --card-pink: #FFB7B7;
    --card-orange: #FFD1A1;
    --card-yellow: #FFF5A1;
    --card-green: #B7FFB7;
    --card-blue: #A1E9FF;
    --card-purple: #D1B7FF;
    
    --border-width: 3px;
    --hard-shadow: 6px 6px 0px var(--text-black);
    --spring-transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

[data-theme="dark"] {
    --bg-main: #1A1614;
    --text-black: #F5F0EB;
    --surface-white: #2A2420;
    
    --card-pink: #D18585;
    --card-orange: #D19F6B;
    --card-yellow: #D1C56B;
    --card-green: #85D185;
    --card-blue: #6BAFD1;
    --card-purple: #9F85D1;
}

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

body {
    font-family: 'Fredoka', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-black);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* --- Category Navigation --- */
.category-nav {
    width: 100%;
    background: var(--surface-white);
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    border-bottom: var(--border-width) solid var(--text-black);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-links { display: flex; gap: 1rem; }
.nav-spacer { flex-grow: 1; }
.nav-controls { display: flex; align-items: center; gap: 0.8rem; }

/* Custom Language Dropdown Styles */
.lang-dropdown {
    position: relative;
}

.lang-current {
    width: 60px;
    height: 60px;
    padding: 0;
    background: var(--card-blue);
    border: var(--border-width) solid var(--text-black);
    border-radius: 15px;
    box-shadow: 4px 4px 0px var(--text-black);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--spring-transition);
}

.lang-current img {
    width: 38px;
    border-radius: 4px;
    border: 1px solid rgba(0,0,0,0.1);
}

.lang-options {
    position: absolute;
    top: 120%;
    right: 0;
    background: var(--surface-white);
    border: var(--border-width) solid var(--text-black);
    border-radius: 15px;
    box-shadow: 6px 6px 0px var(--text-black);
    display: none;
    flex-direction: column;
    overflow: hidden;
    z-index: 1001;
    min-width: 60px;
}

.lang-options.show {
    display: flex;
}

.lang-opt {
    padding: 0.8rem;
    cursor: pointer;
    display: flex;
    justify-content: center;
    transition: background 0.2s;
}

.lang-opt:hover {
    background: var(--card-yellow);
}

.lang-opt img {
    width: 32px;
    border-radius: 4px;
}

/* Nav Buttons */
.nav-btn {
    padding: 0.8rem 1.2rem;
    font-family: inherit;
    font-weight: 700;
    font-size: 1.1rem;
    background: var(--surface-white);
    color: var(--text-black);
    border: var(--border-width) solid var(--text-black);
    border-radius: 15px;
    cursor: pointer;
    transition: var(--spring-transition);
    box-shadow: 4px 4px 0px var(--text-black);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}

.icon-nav-btn {
    padding: 0;
    width: 60px;
    height: 60px;
    font-size: 1.8rem;
}

.theme-btn {
    padding: 0;
    width: 60px;
    height: 60px;
    font-size: 1.8rem;
}

.nav-btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0px var(--text-black);
}

.nav-btn.active {
    background: var(--card-yellow);
    transform: translate(2px, 2px);
    box-shadow: 0px 0px 0px var(--text-black);
}

.app-container {
    width: 100%;
    max-width: 900px;
    padding: 4rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 4.5rem;
}

main { display: flex; flex-direction: column; gap: 5rem; }

/* Quiz CTA */
.quiz-cta { margin-top: -2rem; margin-bottom: -2rem; }
.quiz-cta-btn {
    display: flex; align-items: center; gap: 1.5rem; background: var(--card-orange);
    color: #2A2420; text-decoration: none; padding: 1.5rem 2rem;
    border: var(--border-width) solid var(--text-black); border-radius: 25px;
    box-shadow: var(--hard-shadow); transition: var(--spring-transition);
}
.quiz-cta-btn:hover { transform: translate(-4px, -4px); box-shadow: 10px 10px 0px var(--text-black); background: var(--card-yellow); }
.cta-icon { font-size: 2.5rem; }
.cta-text { display: flex; flex-direction: column; text-align: left; flex-grow: 1; }
.cta-text strong { font-size: 1.4rem; margin-bottom: 0.2rem; }
.cta-text span { font-size: 1rem; opacity: 0.8; }

@keyframes fadeInPop {
    0% { opacity: 0; transform: scale(0.5) translateY(20px); }
    100% { opacity: 1; transform: scale(1) translateY(0); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

@keyframes pulse-gentle {
    0%, 100% { transform: translate(2px, 2px) scale(1); }
    50% { transform: translate(2px, 2px) scale(0.98); opacity: 0.9; }
}

header { text-align: center; }
.logo .icon { font-size: 4rem; display: inline-block; animation: float 4s ease-in-out infinite; }
h1 { font-size: 4rem; font-weight: 700; color: var(--text-black); letter-spacing: -2px; }
.logo-h { color: #FF4D91; }
.logo-s { color: #00C2FF; }
.subtitle { font-size: 1.3rem; font-weight: 500; background: var(--surface-white); padding: 0.3rem 1rem; border: 2px solid var(--text-black); border-radius: 12px; display: inline-block; }

.animal-grid { display: flex; flex-wrap: wrap; gap: 1.2rem; justify-content: center; }
.animal-btn {
    background: var(--surface-white); color: var(--text-black); border: var(--border-width) solid var(--text-black);
    box-shadow: 4px 4px 0px var(--text-black); padding: 1.2rem; border-radius: 20px;
    cursor: pointer; transition: var(--spring-transition); display: flex; flex-direction: column; align-items: center; min-width: 110px;
}
.animal-btn .emoji { font-size: 3rem; }
.animal-btn .name { font-size: 1.1rem; font-weight: 800; margin-top: 0.5rem; text-transform: uppercase; }
.animal-btn:hover { transform: translate(-2px, -2px); box-shadow: 6px 6px 0px var(--text-black); background: var(--card-blue); }
.animal-btn:active, .animal-btn.active { transform: translate(2px, 2px); box-shadow: 0px 0px 0px var(--text-black); background: var(--card-purple); color: #2A2420; }

.results-section { background: var(--bg-main); padding: 3rem 2rem; border-radius: 40px; border: var(--border-width) solid var(--text-black); box-shadow: var(--hard-shadow); }
.selected-animal-header { text-align: center; margin-bottom: 3rem; }
.selected-animal-header .main-icon { font-size: 6rem; display: inline-block; animation: float 3.5s ease-in-out infinite; }
.selected-animal-header h2 { font-size: 2.8rem; background: var(--surface-white); padding: 0.5rem 2rem; border: 3px solid var(--text-black); border-radius: 100px; display: inline-block; }

.sounds-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 2rem; }
.sound-card {
    border: var(--border-width) solid var(--text-black); border-radius: 24px; padding: 1.8rem; cursor: pointer;
    transition: var(--spring-transition); box-shadow: var(--hard-shadow); display: flex; flex-direction: column; gap: 1.2rem;
    position: relative; overflow: hidden; color: #2A2420;
}
.sound-card:nth-child(6n+1) { background: var(--card-green); }
.sound-card:nth-child(6n+2) { background: var(--card-pink); }
.sound-card:nth-child(6n+3) { background: var(--card-blue); }
.sound-card:nth-child(6n+4) { background: var(--card-yellow); }
.sound-card:nth-child(6n+5) { background: var(--card-orange); }
.sound-card:nth-child(6n+6) { background: var(--card-purple); }
.sound-card:hover { transform: translate(-4px, -4px) scale(1.02); box-shadow: 10px 10px 0px var(--text-black); }

.sound-card.playing {
    animation: pulse-gentle 1.5s ease-in-out infinite;
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0px var(--text-black);
    background: var(--surface-white) !important;
    border-color: var(--card-purple);
}

.card-header { display: flex; align-items: center; gap: 0.8rem; border-bottom: 2px solid var(--text-black); padding-bottom: 0.8rem; }
.card-header .country { font-weight: 700; font-size: 1.2rem; flex-grow: 1; }
.card-actions { display: flex; gap: 0.5rem; }
.fav-btn, .share-btn {
    background: var(--surface-white); border: 2px solid var(--text-black); border-radius: 10px;
    padding: 0.4rem 0.6rem; cursor: pointer; font-size: 1.1rem; box-shadow: 2px 2px 0px var(--text-black);
    transition: var(--spring-transition); display: flex; align-items: center; justify-content: center;
}
.fav-btn.active { background: #FFB7B7; border-color: #FF4D91; }
.share-btn { background: #D1B7FF; }
.fav-btn:hover, .share-btn:hover { transform: translate(-1px, -1px); box-shadow: 3px 3px 0px var(--text-black); }
.share-btn:hover { background: var(--card-yellow); }

.card-body { display: flex; flex-direction: column; gap: 1.5rem; align-items: center; }
.sound-word { font-size: 2.8rem; font-weight: 800; text-align: center; line-height: 1.2; white-space: nowrap; width: 100%; overflow: hidden; letter-spacing: -1px; }
.pronunciation { font-size: 1.1rem; background: var(--surface-white); color: var(--text-black); padding: 0.8rem 1rem; border: 2px solid var(--text-black); border-radius: 14px; text-align: center; font-weight: 600; width: 100%; }

.toast { position: fixed; bottom: 2rem; left: 50%; transform: translateX(-50%) translateY(100px); background: var(--text-black); color: var(--bg-main); padding: 1rem 2rem; border-radius: 50px; font-weight: 700; z-index: 10000; transition: transform 0.3s; box-shadow: var(--hard-shadow); }
.toast.show { transform: translateX(-50%) translateY(0); }

.info-section { display: flex; flex-direction: column; gap: 2.5rem; margin-top: 2rem; }
.info-card { background: var(--surface-white); border: var(--border-width) solid var(--text-black); border-radius: 30px; padding: 2.5rem; box-shadow: var(--hard-shadow); }
.info-card.alternate { background: var(--card-blue); }
[data-theme="dark"] .info-card.alternate { background: var(--card-blue); color: #2A2420; }
.info-card h3 { font-size: 1.8rem; margin-bottom: 1.5rem; color: var(--text-black); }
[data-theme="dark"] .info-card.alternate h3 { color: #2A2420; }
.info-card p { font-size: 1.1rem; line-height: 1.7; margin-bottom: 1rem; }

footer { text-align: center; font-weight: 700; padding: 2rem 0; display: flex; flex-direction: column; gap: 1rem; }
.footer-nav { display: flex; justify-content: center; gap: 1.5rem; }
.footer-link { color: var(--text-black); text-decoration: none; font-size: 0.9rem; padding: 0.5rem 1rem; background: var(--surface-white); border: 2px solid var(--text-black); border-radius: 10px; box-shadow: 3px 3px 0px var(--text-black); transition: var(--spring-transition); }
.footer-link:hover { transform: translate(-2px, -2px); box-shadow: 5px 5px 0px var(--text-black); background: var(--card-blue); }

@media (max-width: 600px) {
    h1 { font-size: 2.2rem; }
    .category-nav { padding: 0.6rem; gap: 0.4rem; flex-wrap: wrap; }
    .nav-links { gap: 0.4rem; width: 100%; justify-content: center; margin-bottom: 0.5rem; }
    .nav-controls { width: 100%; justify-content: center; }
    .nav-btn { padding: 0.5rem 0.7rem; font-size: 0.85rem; }
    .lang-current { width: 50px; height: 50px; }
    .lang-current img { width: 30px; }
    .icon-nav-btn, .theme-btn { width: 50px; height: 50px; font-size: 1.5rem; padding: 0; }
    .app-container { padding: 1.5rem 1rem; gap: 2.5rem; }
    .animal-grid { grid-template-columns: repeat(3, 1fr); gap: 0.6rem; }
    .animal-btn .emoji { font-size: 2rem; }
    .animal-btn .name { font-size: 0.75rem; }
    .selected-animal-header h2 { font-size: 1.8rem; }
    .sounds-grid { grid-template-columns: 1fr; }
}