:root {
    --bg-start: oklch(30% 0.1 260);
    --bg-end: oklch(20% 0.1 280);
    --primary-color: oklch(70% 0.15 260);
    --text-color: oklch(98% 0.01 260);
    --glass-bg: oklch(100% 0 0 / 12%);
    --glass-border: oklch(100% 0 0 / 20%);
    --card-bg: oklch(100% 0 0 / 10%);
    --transition-speed: 0.6s;
}

/* 감정별 테마 */
body.mood-joy { --bg-start: oklch(85% 0.2 85); --bg-end: oklch(75% 0.2 60); --primary-color: oklch(80% 0.25 80); --text-color: oklch(20% 0.05 85); --glass-bg: oklch(100% 0 0 / 40%); }
body.mood-sadness { --bg-start: oklch(25% 0.08 260); --bg-end: oklch(15% 0.08 280); --primary-color: oklch(50% 0.15 260); --text-color: oklch(95% 0.01 260); --glass-bg: oklch(0% 0 0 / 25%); }
body.mood-embarrassment { --bg-start: oklch(75% 0.15 330); --bg-end: oklch(65% 0.15 310); --primary-color: oklch(70% 0.2 320); --text-color: oklch(20% 0.05 320); --glass-bg: oklch(100% 0 0 / 35%); }
body.mood-hurt { --bg-start: oklch(35% 0.1 300); --bg-end: oklch(25% 0.1 320); --primary-color: oklch(45% 0.15 310); --text-color: oklch(95% 0.01 310); --glass-bg: oklch(0% 0 0 / 20%); }
body.mood-anxiety { --bg-start: oklch(70% 0.1 190); --bg-end: oklch(60% 0.1 210); --primary-color: oklch(65% 0.15 200); --text-color: oklch(20% 0.05 200); --glass-bg: oklch(100% 0 0 / 30%); }
body.mood-anger { --bg-start: oklch(45% 0.2 25); --bg-end: oklch(35% 0.2 35); --primary-color: oklch(50% 0.25 30); --text-color: oklch(98% 0.01 30); --glass-bg: oklch(0% 0 0 / 30%); }

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-image: linear-gradient(135deg, var(--bg-start), var(--bg-end));
    background-attachment: fixed;
    color: var(--text-color);
    transition: background-image var(--transition-speed) ease, color 0.4s ease;
    padding: 1rem;
}

.container {
    width: 100%;
    max-width: 600px;
    padding: 2.5rem;
    border-radius: 2rem;
    text-align: center;
}

.glass {
    background-color: var(--glass-bg);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border: 1px solid var(--glass-border);
    box-shadow: 0 10px 40px oklch(0% 0 0 / 15%);
}

.view { transition: opacity 0.5s ease, transform 0.5s ease; }
.view.hidden { display: none; opacity: 0; transform: translateY(10px); }

h1 { font-size: 3.5rem; margin-bottom: 0.5rem; font-weight: 900; letter-spacing: -2px; }
.subtitle { font-size: 1.2rem; font-weight: 600; opacity: 0.7; margin-bottom: 2rem; letter-spacing: 2px; text-transform: uppercase; }
p { font-size: 1.1rem; opacity: 0.8; margin-bottom: 2rem; line-height: 1.6; }

.main-btn, .secondary-btn {
    padding: 1rem 2.5rem;
    font-size: 1.2rem;
    font-weight: 700;
    border: none;
    border-radius: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: var(--primary-color);
    color: white;
}

.main-btn:hover, .secondary-btn:hover { transform: scale(1.05); opacity: 0.9; }

/* 설문 스타일 */
.progress-container {
    width: 100%;
    height: 8px;
    background: oklch(0% 0 0 / 10%);
    border-radius: 4px;
    margin-bottom: 2.5rem;
    overflow: hidden;
}

.progress-bar {
    width: 0%;
    height: 100%;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.question-container { margin-bottom: 2.5rem; text-align: left; }
#question-number { font-weight: 800; font-size: 1.2rem; color: var(--primary-color); display: block; margin-bottom: 0.5rem; }
#question-text { font-size: 1.6rem; line-height: 1.4; }

.answer-options { display: flex; flex-direction: column; gap: 0.8rem; }
.answer-btn {
    padding: 1rem;
    font-size: 1.1rem;
    font-weight: 600;
    border: 1px solid var(--glass-border);
    border-radius: 1rem;
    background: var(--glass-bg);
    color: var(--text-color);
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
    padding-left: 1.5rem;
}

.answer-btn:hover { background: oklch(100% 0 0 / 25%); transform: translateX(5px); }

/* 결과 스타일 */
#mood-result-display { margin: 2rem 0; }
#mood-emoji { font-size: 5rem; display: block; margin-bottom: 1rem; }
#mood-name { font-size: 3rem; font-weight: 900; }

.song-card {
    background-color: var(--card-bg);
    border-radius: 1.5rem;
    padding: 2rem;
    margin-bottom: 2rem;
    border: 1px solid var(--glass-border);
}

.song-info h3 { font-size: 1.6rem; margin-bottom: 0.4rem; }
.artist-name { opacity: 0.8; margin-bottom: 1.5rem; }

.listen-link {
    display: inline-block;
    padding: 0.8rem 2rem;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 0.8rem;
    font-weight: 700;
}

@media (max-width: 480px) {
    .container { padding: 1.5rem; }
    #question-text { font-size: 1.3rem; }
    h1 { font-size: 1.8rem; }
}