/* ========== 전역 스타일 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #667eea;
    --primary-dark: #5568d3;
    --secondary: #764ba2;
    --success: #48bb78;
    --warning: #f6ad55;
    --danger: #fc8181;
    --dark: #1a202c;
    --gray-dark: #2d3748;
    --gray: #4a5568;
    --gray-light: #a0aec0;
    --gray-lighter: #e2e8f0;
    --white: #ffffff;
    --bg: #f7fafc;
    
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.15);
    --shadow-xl: 0 20px 40px rgba(0,0,0,0.2);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
}

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--dark);
    line-height: 1.6;
}

/* ========== 페이지 전환 ========== */
.page {
    display: none;
    min-height: 100vh;
    animation: fadeIn 0.5s ease;
}

.page.active {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px 0;
}

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

/* ========== 랜딩 페이지 ========== */
.landing-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 20px;
}

.landing-hero {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: 80px 60px;
    box-shadow: var(--shadow-xl);
    text-align: center;
}

.logo-container {
    margin-bottom: 50px;
}

.logo-icon {
    font-size: 5rem;
    margin-bottom: 20px;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.main-title {
    font-size: 3rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 5px;
}

.main-subtitle {
    font-size: 1.1rem;
    color: var(--gray);
    font-weight: 300;
    letter-spacing: 2px;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 25px;
    line-height: 1.3;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--gray);
    margin-bottom: 50px;
    line-height: 1.8;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.feature-card {
    background: var(--bg);
    padding: 35px 25px;
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    font-size: 3.5rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.3rem;
    color: var(--dark);
    margin-bottom: 12px;
    font-weight: 600;
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--gray);
    line-height: 1.6;
}

.cta-section {
    margin-bottom: 30px;
}

.btn-start {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    border: none;
    padding: 22px 60px;
    font-size: 1.3rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 15px;
}

.btn-start:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.btn-start:active {
    transform: translateY(-1px);
}

.btn-arrow {
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

.btn-start:hover .btn-arrow {
    transform: translateX(5px);
}

.time-info {
    margin-top: 20px;
    color: var(--gray);
    font-size: 1rem;
}

.trust-badges {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.badge {
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary);
    padding: 10px 25px;
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 500;
}

/* ========== 질문 페이지 ========== */
.question-container {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.question-header {
    background: var(--white);
    padding: 30px;
    border-radius: var(--radius-lg);
    margin-bottom: 30px;
    box-shadow: var(--shadow-md);
}

.progress-section {
    width: 100%;
}

.progress-bar-container {
    width: 100%;
    height: 10px;
    background: var(--gray-lighter);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 15px;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: width 0.3s ease;
    width: 2%;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.progress-text {
    font-size: 1rem;
    font-weight: 600;
    color: var(--dark);
}

.section-text {
    font-size: 0.95rem;
    color: var(--gray);
    font-weight: 500;
}

.question-content {
    background: var(--white);
    padding: 50px 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.question-number {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 25px;
}

.question-title {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 15px;
    line-height: 1.5;
}

.question-hint {
    font-size: 1rem;
    color: var(--gray);
    margin-bottom: 40px;
}

.answers-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 40px;
}

.answer-option {
    background: var(--bg);
    border: 3px solid transparent;
    padding: 25px 30px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 20px;
    text-align: left;
}

.answer-option:hover {
    background: rgba(102, 126, 234, 0.05);
    border-color: var(--primary);
    transform: translateX(5px);
}

.answer-option.selected {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.15), rgba(118, 75, 162, 0.15));
    border-color: var(--primary);
}

.answer-radio {
    width: 28px;
    height: 28px;
    border: 3px solid var(--gray-light);
    border-radius: 50%;
    flex-shrink: 0;
    position: relative;
    transition: all 0.3s ease;
}

.answer-option.selected .answer-radio {
    border-color: var(--primary);
    background: var(--primary);
}

.answer-option.selected .answer-radio::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--white);
    font-size: 16px;
    font-weight: 700;
}

.answer-content {
    flex: 1;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.answer-label {
    font-size: 1.15rem;
    font-weight: 500;
    color: var(--dark);
}

.answer-number {
    font-size: 1rem;
    color: var(--gray);
    font-weight: 600;
    background: var(--white);
    width: 35px;
    height: 35px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.answer-option.selected .answer-number {
    background: var(--primary);
    color: var(--white);
}

.navigation-buttons {
    display: flex;
    justify-content: flex-start;
}

.btn-back {
    background: var(--white);
    color: var(--gray);
    border: 2px solid var(--gray-lighter);
    padding: 15px 35px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-back:hover {
    background: var(--bg);
    border-color: var(--gray-light);
}

.btn-back:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* ========== 결과 미리보기 페이지 ========== */
.result-container {
    max-width: 1000px;
    margin: 40px auto;
    padding: 20px;
}

.result-hero {
    background: var(--white);
    padding: 60px 40px;
    border-radius: var(--radius-xl);
    text-align: center;
    margin-bottom: 30px;
    box-shadow: var(--shadow-lg);
}

.result-icon {
    font-size: 5rem;
    margin-bottom: 20px;
}

.result-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 15px;
}

.result-subtitle {
    font-size: 1.2rem;
    color: var(--gray);
}

.preview-scores {
    background: var(--white);
    padding: 50px 40px;
    border-radius: var(--radius-xl);
    margin-bottom: 30px;
    box-shadow: var(--shadow-lg);
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 50px;
}

.score-main {
    text-align: center;
}

.score-circle-container {
    position: relative;
    margin: 0 auto 25px;
}

.score-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.score-number {
    font-size: 3.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.score-label {
    font-size: 1.2rem;
    color: var(--gray);
}

.score-interpretation {
    font-size: 1.1rem;
    color: var(--gray-dark);
    font-weight: 600;
    padding: 15px 25px;
    background: var(--bg);
    border-radius: var(--radius-md);
}

.preview-breakdown h3 {
    font-size: 1.5rem;
    color: var(--dark);
    margin-bottom: 25px;
}

.breakdown-item {
    margin-bottom: 20px;
}

.breakdown-label {
    font-size: 0.95rem;
    color: var(--gray-dark);
    font-weight: 500;
    display: block;
    margin-bottom: 8px;
}

.breakdown-bar {
    height: 12px;
    background: var(--gray-lighter);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
    display: inline-block;
    width: calc(100% - 60px);
    vertical-align: middle;
}

.breakdown-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: width 1s ease;
    width: 0%;
}

.breakdown-score {
    display: inline-block;
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary);
    width: 50px;
    text-align: right;
    vertical-align: middle;
}

/* ========== 이메일 수집 섹션 ========== */
.unlock-section {
    background: var(--white);
    padding: 60px 50px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.unlock-icon {
    font-size: 4rem;
    margin-bottom: 20px;
}

.unlock-section h2 {
    font-size: 2rem;
    color: var(--dark);
    margin-bottom: 15px;
    font-weight: 700;
}

.unlock-description {
    font-size: 1.15rem;
    color: var(--gray);
    margin-bottom: 35px;
    line-height: 1.7;
}

.report-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    max-width: 600px;
    margin: 0 auto 40px;
}

.report-feature {
    background: var(--bg);
    padding: 15px 20px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    color: var(--gray-dark);
    text-align: left;
    font-weight: 500;
}

.email-form {
    max-width: 600px;
    margin: 0 auto;
}

.email-input-group {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
}

.email-input {
    flex: 1;
    padding: 20px 25px;
    font-size: 1.05rem;
    border: 2px solid var(--gray-lighter);
    border-radius: 50px;
    transition: all 0.3s ease;
}

.email-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.btn-submit {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    border: none;
    padding: 20px 40px;
    font-size: 1.05rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.privacy-note {
    font-size: 0.85rem;
    color: var(--gray);
    line-height: 1.6;
}

/* ========== 연구 푸터 ========== */
.research-footer {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-xl);
    margin-top: 30px;
    box-shadow: var(--shadow-md);
}

.research-footer h4 {
    font-size: 1.2rem;
    color: var(--dark);
    margin-bottom: 20px;
}

.research-footer ul {
    list-style: none;
    margin-bottom: 20px;
}

.research-footer li {
    font-size: 0.9rem;
    color: var(--gray);
    padding: 8px 0;
    line-height: 1.6;
}

.disclaimer {
    font-size: 0.85rem;
    color: var(--gray);
    font-style: italic;
    padding-top: 20px;
    border-top: 1px solid var(--gray-lighter);
}

/* ========== 감사 페이지 ========== */
.thank-you-container {
    max-width: 700px;
    margin: 0 auto;
    background: var(--white);
    padding: 80px 60px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    text-align: center;
}

.thank-you-icon {
    font-size: 6rem;
    margin-bottom: 30px;
}

.thank-you-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 25px;
}

.thank-you-message {
    font-size: 1.2rem;
    color: var(--gray);
    line-height: 1.8;
    margin-bottom: 50px;
}

.thank-you-timeline {
    max-width: 500px;
    margin: 0 auto 40px;
}

.timeline-item {
    display: flex;
    gap: 20px;
    padding: 25px;
    background: var(--bg);
    border-radius: var(--radius-md);
    margin-bottom: 15px;
    text-align: left;
}

.timeline-icon {
    font-size: 2.5rem;
}

.timeline-content strong {
    display: block;
    font-size: 1.1rem;
    color: var(--dark);
    margin-bottom: 5px;
}

.timeline-content p {
    font-size: 0.95rem;
    color: var(--gray);
}

.btn-restart {
    background: var(--white);
    color: var(--primary);
    border: 2px solid var(--primary);
    padding: 18px 50px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-restart:hover {
    background: var(--primary);
    color: var(--white);
}

/* ========== 반응형 ========== */
@media (max-width: 768px) {
    .landing-hero {
        padding: 50px 30px;
    }
    
    .main-title {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .preview-scores {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .report-features {
        grid-template-columns: 1fr;
    }
    
    .email-input-group {
        flex-direction: column;
    }
    
    .btn-submit {
        width: 100%;
    }
    
    .question-content {
        padding: 35px 25px;
    }
    
    .question-title {
        font-size: 1.4rem;
    }
    
    .answer-label {
        font-size: 1rem;
    }
}