:root {
    --primary-color: #1e40af;
    --secondary-color: #3b82f6;
    --accent-color: #60a5fa;
    --electric-color: #fbbf24;
    --warning-color: #dc2626;
    --success-color: #059669;
    --danger-color: #ef4444;
    --gold-color: #f59e0b;
    --neutral-color: #64748b;
    --background-color: #f8fafc;
    --surface-color: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-heavy: 0 10px 25px rgba(0, 0, 0, 0.2);
    --gradient-primary: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
    --gradient-electric: linear-gradient(135deg, #fbbf24 0%, #f59e0b 50%, #d97706 100%);
    --gradient-danger: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
    --gradient-success: linear-gradient(135deg, #059669 0%, #047857 100%);
    --gradient-warning: linear-gradient(135deg, #d97706 0%, #b45309 100%);
}

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

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--background-color);
    min-height: 100vh;
    overflow-x: hidden;
}

/* 컨테이너 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 페이지 공통 */
.page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 0;
    position: relative;
}

.page::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 15% 25%, rgba(251, 191, 36, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 85% 75%, rgba(245, 158, 11, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(30, 64, 175, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.hidden {
    display: none !important;
}

/* 광고 컨테이너 */
.ad-container {
    width: 100%;
    text-align: center;
    margin: 20px 0;
    position: relative;
    z-index: 10;
}

.ad-container.top {
    margin: 0 0 20px 0;
    padding: 10px 0;
}

.ad-container.bottom {
    margin: 40px 0 0 0;
    padding: 20px 0;
}

.ad-container.popup {
    margin: 20px 0;
    padding: 15px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

/* 시작 페이지 */
.start-content {
    text-align: center;
    background: var(--surface-color);
    border-radius: 24px;
    padding: 60px 40px;
    box-shadow: var(--shadow-heavy);
    position: relative;
    overflow: hidden;
    max-width: 900px;
    margin: 0 auto;
}

.start-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-electric);
}

.main-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    background: var(--gradient-electric);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.title-icon {
    font-size: 3.5rem;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

.subtitle {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 50px;
    font-weight: 500;
}

/* 전기요금 비교 비주얼 */
.hero-visual {
    margin: 50px 0;
    display: flex;
    justify-content: center;
    align-items: center;
}

.bill-comparison {
    display: flex;
    align-items: center;
    gap: 30px;
}

.electric-bill {
    width: 200px;
    height: 140px;
    border-radius: 16px;
    padding: 25px;
    color: white;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all 0.3s ease;
}

.electric-bill.before {
    background: var(--gradient-success);
    animation: pulse 2s ease-in-out infinite;
}

.electric-bill.after {
    background: var(--gradient-danger);
    animation: shake 2s ease-in-out infinite;
}

.electric-bill::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.bill-header {
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    opacity: 0.9;
}

.bill-amount {
    font-size: 2rem;
    font-weight: 800;
    text-align: center;
    margin: 10px 0;
}

.bill-usage {
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    opacity: 0.8;
}

.arrow {
    font-size: 2.5rem;
    color: var(--electric-color);
    font-weight: bold;
    animation: bounce 1s ease-in-out infinite;
}

/* 특징 그리드 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 25px;
    margin: 50px 0;
}

.feature-card {
    background: var(--surface-color);
    padding: 30px 20px;
    border-radius: 16px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-electric);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

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

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
    display: block;
}

.feature-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* 긴급 알림 */
.urgency-notice {
    background: linear-gradient(135deg, rgba(220, 38, 38, 0.1) 0%, rgba(185, 28, 28, 0.1) 100%);
    border: 2px solid var(--danger-color);
    border-radius: 16px;
    padding: 25px;
    margin: 40px 0;
    display: flex;
    align-items: center;
    gap: 20px;
    position: relative;
    overflow: hidden;
}

.urgency-notice::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    animation: shimmer 2s infinite;
}

.notice-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.notice-content {
    flex: 1;
}

.notice-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--danger-color);
    margin-bottom: 5px;
}

.notice-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* CTA 버튼 */
.cta-button {
    background: var(--gradient-electric);
    color: white;
    border: none;
    padding: 20px 40px;
    border-radius: 50px;
    font-size: 1.2rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin: 30px 0;
    position: relative;
    overflow: hidden;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.cta-button:hover::before {
    left: 100%;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(251, 191, 36, 0.4);
}

.button-icon {
    font-size: 1.3rem;
}

.button-arrow {
    font-size: 1.1rem;
    transition: transform 0.3s ease;
}

.cta-button:hover .button-arrow {
    transform: translateX(5px);
}

/* 소셜 공유 */
.social-share {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.share-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 15px;
}

.share-buttons {
    display: flex;
    justify-content: center;
    gap: 10px;
}

.share-button {
    padding: 10px 20px;
    border: none;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.share-button.kakao {
    background: #FEE500;
    color: #3C1E1E;
}

.share-button.kakao:hover {
    background: #FDD000;
    transform: translateY(-2px);
}

/* 질문 페이지 */
.question-content {
    background: var(--surface-color);
    border-radius: 24px;
    padding: 40px;
    box-shadow: var(--shadow-heavy);
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
}

.progress-section {
    margin-bottom: 40px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-electric);
    border-radius: 4px;
    transition: width 0.3s ease;
    width: 0%;
}

.progress-text {
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.question-card {
    text-align: center;
}

.question-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 40px;
    line-height: 1.4;
}

.answers-container {
    display: grid;
    gap: 15px;
    max-width: 600px;
    margin: 0 auto;
}

.answer-option {
    background: var(--surface-color);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
    font-weight: 500;
    text-align: left;
    position: relative;
    overflow: hidden;
}

.answer-option::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(251, 191, 36, 0.1), transparent);
    transition: left 0.3s ease;
}

.answer-option:hover {
    border-color: var(--electric-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.answer-option:hover::before {
    left: 100%;
}

/* 로딩 페이지 */
.loading-content {
    text-align: center;
    background: var(--surface-color);
    border-radius: 24px;
    padding: 60px 40px;
    box-shadow: var(--shadow-heavy);
    max-width: 600px;
    margin: 0 auto;
}

.loading-animation {
    margin-bottom: 30px;
    position: relative;
    display: inline-block;
}

.loading-circle {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: var(--gradient-electric);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    animation: spin 2s linear infinite;
}

.loading-icon {
    font-size: 3rem;
    color: white;
}

.loading-bars {
    display: flex;
    justify-content: center;
    gap: 5px;
    margin-top: 20px;
}

.bar {
    width: 6px;
    height: 40px;
    background: var(--gradient-electric);
    border-radius: 3px;
    animation: wave 1.2s ease-in-out infinite;
}

.bar:nth-child(1) { animation-delay: 0s; }
.bar:nth-child(2) { animation-delay: 0.1s; }
.bar:nth-child(3) { animation-delay: 0.2s; }
.bar:nth-child(4) { animation-delay: 0.3s; }
.bar:nth-child(5) { animation-delay: 0.4s; }

.loading-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.loading-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.countdown {
    font-size: 3rem;
    font-weight: 800;
    color: var(--electric-color);
    margin: 20px 0;
}

/* 결과 페이지 */
.result-content {
    background: var(--surface-color);
    border-radius: 24px;
    padding: 40px;
    box-shadow: var(--shadow-heavy);
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.result-header {
    margin-bottom: 40px;
    padding-bottom: 30px;
    border-bottom: 2px solid var(--border-color);
}

.result-badge {
    font-size: 4rem;
    margin-bottom: 15px;
    display: block;
    animation: bounce 1s ease-in-out infinite;
}

.result-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 10px;
    background: var(--gradient-electric);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.result-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.result-body {
    text-align: left;
    margin-bottom: 40px;
}

.result-summary {
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.1) 0%, rgba(245, 158, 11, 0.1) 100%);
    border-left: 4px solid var(--electric-color);
    padding: 25px;
    border-radius: 12px;
    margin-bottom: 30px;
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--text-primary);
}

.result-details {
    margin-bottom: 30px;
}

.result-details h4 {
    color: var(--electric-color);
    font-size: 1.3rem;
    font-weight: 700;
    margin: 25px 0 15px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.result-details ul {
    list-style: none;
    padding: 0;
    margin-bottom: 20px;
}

.result-details li {
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 1rem;
    line-height: 1.5;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.result-details li:last-child {
    border-bottom: none;
}

.result-details a {
    color: var(--electric-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.result-details a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.action-guide {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1) 0%, rgba(217, 119, 6, 0.1) 100%);
    border: 2px solid var(--electric-color);
    border-radius: 12px;
    padding: 25px;
    font-weight: 600;
    color: var(--text-primary);
}

.result-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    justify-content: center;
    padding-top: 30px;
    border-top: 2px solid var(--border-color);
}

.action-button {
    padding: 15px 30px;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.action-button.primary {
    background: var(--gradient-electric);
    color: white;
}

.action-button.secondary {
    background: var(--gradient-primary);
    color: white;
}

.action-button.share {
    background: var(--gradient-warning);
    color: white;
}

.action-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

/* 애니메이션 */
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-2px); }
    75% { transform: translateX(2px); }
}

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

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes wave {
    0%, 100% { transform: scaleY(1); }
    50% { transform: scaleY(0.5); }
}

/* 반응형 디자인 */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .start-content {
        padding: 40px 20px;
        margin: 20px 0;
    }
    
    .main-title {
        font-size: 2.5rem;
        flex-direction: column;
        gap: 10px;
    }
    
    .title-icon {
        font-size: 2.5rem;
    }
    
    .subtitle {
        font-size: 1.1rem;
    }
    
    .hero-visual {
        margin: 30px 0;
    }
    
    .bill-comparison {
        flex-direction: column;
        gap: 20px;
    }
    
    .arrow {
        transform: rotate(90deg);
        font-size: 2rem;
    }
    
    .electric-bill {
        width: 180px;
        height: 120px;
    }
    
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 15px;
        margin: 30px 0;
    }
    
    .feature-card {
        padding: 20px 15px;
    }
    
    .urgency-notice {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .cta-button {
        font-size: 1rem;
        padding: 18px 30px;
    }
    
    .question-content {
        padding: 30px 20px;
        margin: 20px 0;
    }
    
    .question-title {
        font-size: 1.5rem;
    }
    
    .loading-content {
        padding: 40px 20px;
        margin: 20px 0;
    }
    
    .loading-circle {
        width: 100px;
        height: 100px;
    }
    
    .loading-icon {
        font-size: 2.5rem;
    }
    
    .result-content {
        padding: 30px 20px;
        margin: 20px 0;
    }
    
    .result-badge {
        font-size: 3rem;
    }
    
    .result-title {
        font-size: 2rem;
    }
    
    .result-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .action-button {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
}

/* 광고 컨테이너 스타일 (새로 추가) */
.ad-container {
    width: 100%;
    margin: 20px 0;
    padding: 10px;
    text-align: center;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 8px;
    box-shadow: var(--shadow-light);
    transition: all 0.3s ease;
}

.ad-container.top {
    margin: 0 0 20px 0;
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.05), rgba(59, 130, 246, 0.05));
    border: 1px solid rgba(30, 64, 175, 0.1);
}

.ad-container.mid {
    margin: 30px 0;
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.05), rgba(245, 158, 11, 0.05));
    border: 1px solid rgba(251, 191, 36, 0.2);
}

.ad-container.result {
    margin: 20px 0;
    background: linear-gradient(135deg, rgba(5, 150, 105, 0.05), rgba(4, 120, 87, 0.05));
    border: 1px solid rgba(5, 150, 105, 0.2);
}

.ad-container ins {
    display: block !important;
    min-height: 100px;
}

.ad-container.loading {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* 모바일 광고 최적화 (새로 추가) */
@media (max-width: 768px) {
    .ad-container {
        margin: 15px 0;
        padding: 8px;
        border-radius: 6px;
    }
    
    .ad-container ins {
        min-height: 80px;
    }
}