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

:root {
    --primary-color: #0066cc;
    --secondary-color: #00d4ff;
    --accent-color: #ff6b6b;
    --text-color: #333;
    --light-bg: #f5f5f5;
    --white: #ffffff;
    --border-color: #ddd;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
}

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

/* 헤더 */
.header {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: var(--white);
}

.nav {
    display: flex;
    gap: 30px;
}

.nav a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav a:hover,
.nav a.active {
    color: var(--secondary-color);
}

/* 히어로 섹션 */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: 80px 0;
    text-align: center;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: bold;
}

.hero p {
    font-size: 20px;
    opacity: 0.9;
}

/* 쿠폰 섹션 */
.coupon-section {
    padding: 60px 0;
    background-color: var(--light-bg);
}

.coupon-section h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.section-desc {
    text-align: center;
    font-size: 16px;
    color: #666;
    margin-bottom: 40px;
}

.coupon-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.coupon-card {
    background-color: var(--white);
    border: 2px solid var(--primary-color);
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
}

.coupon-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 16px rgba(0, 102, 204, 0.2);
}

.coupon-code {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 15px;
    font-family: 'Courier New', monospace;
    background-color: var(--light-bg);
    padding: 15px;
    border-radius: 5px;
}

.copy-btn {
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 12px 30px;
    border-radius: 5px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}

.copy-btn:hover {
    background-color: #0052a3;
    transform: scale(1.05);
}

.copy-btn:active {
    transform: scale(0.98);
}

/* 기능 섹션 */
.features {
    padding: 60px 0;
    background-color: var(--white);
}

.features h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 40px;
    color: var(--primary-color);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: var(--light-bg);
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 24px rgba(0, 102, 204, 0.15);
}

.feature-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.feature-card p {
    color: #666;
    font-size: 14px;
}

/* 사용 방법 */
.how-to-use {
    padding: 60px 0;
    background-color: var(--light-bg);
}

.how-to-use h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 40px;
    color: var(--primary-color);
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.step {
    background-color: var(--white);
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    box-shadow: var(--shadow);
}

.step-number {
    display: inline-block;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    line-height: 50px;
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 15px;
}

.step h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.step p {
    color: #666;
    font-size: 14px;
}

/* 엔터테인먼트 섹션 */
.entertainment,
.data-center,
.global-access,
.premium-badge,
.user-experience {
    padding: 60px 0;
}

.entertainment h2,
.data-center h2,
.global-access h2,
.premium-badge h2,
.user-experience h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 30px;
    color: var(--primary-color);
}

.entertainment {
    background-color: var(--white);
}

.data-center {
    background-color: var(--light-bg);
}

.global-access {
    background-color: var(--white);
}

.premium-badge {
    background-color: var(--light-bg);
}

.user-experience {
    background-color: var(--white);
}

.full-width-image {
    width: 100%;
    height: auto;
    border-radius: 10px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
}

.entertainment p,
.data-center p,
.global-access p,
.premium-badge p,
.user-experience p {
    text-align: center;
    color: #666;
    font-size: 16px;
}

/* 독점 콘텐츠 */
.exclusive-content {
    padding: 60px 0;
    background-color: var(--light-bg);
}

.exclusive-content h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.pricing-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 30px;
    box-shadow: var(--shadow);
    border-radius: 10px;
    overflow: hidden;
}

.pricing-table thead {
    background-color: var(--primary-color);
    color: var(--white);
}

.pricing-table th,
.pricing-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.pricing-table tbody tr:hover {
    background-color: #f9f9f9;
}

.pricing-table tbody tr:last-child td {
    border-bottom: none;
}

/* 계산기 섹션 */
.calculator-section {
    padding: 60px 0;
    background-color: var(--white);
}

.calculator-section h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.calculator {
    background-color: var(--light-bg);
    border-radius: 10px;
    padding: 40px;
    max-width: 500px;
    margin: 30px auto;
    box-shadow: var(--shadow);
}

.calc-input {
    margin-bottom: 20px;
}

.calc-input label {
    display: block;
    margin-bottom: 10px;
    font-weight: bold;
    color: var(--primary-color);
}

.calc-input input {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 16px;
}

.calc-result {
    background-color: var(--white);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
}

.result-item {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

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

.result-item.highlight {
    background-color: var(--light-bg);
    padding: 15px;
    border-radius: 5px;
    font-weight: bold;
    color: var(--primary-color);
    margin-top: 10px;
}

.calc-btn {
    width: 100%;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 12px;
    border-radius: 5px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s;
}

.calc-btn:hover {
    background-color: #0052a3;
}

/* 등록 가이드 */
.registration-guide {
    padding: 60px 0;
    background-color: var(--light-bg);
}

.registration-guide h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 40px;
    color: var(--primary-color);
}

.guide-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.guide-step {
    background-color: var(--white);
    border-radius: 10px;
    padding: 25px;
    text-align: center;
    box-shadow: var(--shadow);
}

.step-icon {
    font-size: 40px;
    margin-bottom: 15px;
}

.guide-step h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.guide-step p {
    color: #666;
    font-size: 14px;
}

/* 쿠폰 정보 */
.coupon-info {
    padding: 60px 0;
    background-color: var(--white);
}

.coupon-info h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 30px;
    color: var(--primary-color);
}

.info-box {
    background-color: var(--light-bg);
    border-radius: 10px;
    padding: 30px;
    max-width: 600px;
    margin: 0 auto;
    box-shadow: var(--shadow);
}

.info-item {
    display: flex;
    justify-content: space-between;
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
}

.info-item:last-child {
    border-bottom: none;
}

.info-label {
    font-weight: bold;
    color: var(--primary-color);
}

.info-value {
    color: #666;
}

/* FAQ */
.faq-section {
    padding: 60px 0;
    background-color: var(--light-bg);
}

.faq-section h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 40px;
    color: var(--primary-color);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background-color: var(--white);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 15px;
    box-shadow: var(--shadow);
}

.faq-item h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 16px;
}

.faq-item p {
    color: #666;
    font-size: 14px;
}

/* 체크리스트 */
.checklist {
    background-color: var(--white);
    border-radius: 10px;
    padding: 30px;
    max-width: 600px;
    margin: 30px auto;
    box-shadow: var(--shadow);
}

.checklist-item {
    display: flex;
    align-items: center;
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
}

.checklist-item:last-child {
    border-bottom: none;
}

.checklist-item input[type="checkbox"] {
    width: 20px;
    height: 20px;
    margin-right: 15px;
    cursor: pointer;
}

.checklist-item label {
    cursor: pointer;
    color: #666;
}

/* 추적기 */
.tracker-section {
    padding: 60px 0;
    background-color: var(--white);
}

.tracker-section h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.tracker {
    background-color: var(--light-bg);
    border-radius: 10px;
    padding: 40px;
    max-width: 500px;
    margin: 30px auto;
    box-shadow: var(--shadow);
}

.tracker-input {
    margin-bottom: 20px;
}

.tracker-input label {
    display: block;
    margin-bottom: 10px;
    font-weight: bold;
    color: var(--primary-color);
}

.tracker-input input {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 16px;
}

.tracker-result {
    background-color: var(--white);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
}

.tracker-btn {
    width: 100%;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 12px;
    border-radius: 5px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s;
}

.tracker-btn:hover {
    background-color: #0052a3;
}

/* 보안 및 지원 정보 */
.security-info,
.support-info {
    padding: 60px 0;
}

.security-info {
    background-color: var(--light-bg);
}

.support-info {
    background-color: var(--white);
}

.security-info h2,
.support-info h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 30px;
    color: var(--primary-color);
}

.security-info p,
.support-info p {
    text-align: center;
    color: #666;
    font-size: 16px;
}

/* CTA 섹션 */
.cta-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: 80px 0;
    text-align: center;
}

.cta-section h2 {
    font-size: 36px;
    margin-bottom: 15px;
}

.cta-section p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.cta-button {
    display: inline-block;
    background-color: var(--accent-color);
    color: var(--white);
    padding: 15px 40px;
    border-radius: 5px;
    text-decoration: none;
    font-size: 18px;
    font-weight: bold;
    transition: background-color 0.3s, transform 0.3s;
}

.cta-button:hover {
    background-color: #ff5252;
    transform: scale(1.05);
}

/* 푸터 */
.footer {
    background-color: #222;
    color: var(--white);
    padding: 30px 0;
    text-align: center;
}

.footer p {
    margin: 10px 0;
    font-size: 14px;
}

/* 반응형 디자인 */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 15px;
    }

    .nav {
        gap: 15px;
    }

    .hero h1 {
        font-size: 32px;
    }

    .hero p {
        font-size: 16px;
    }

    .coupon-grid,
    .feature-grid,
    .steps,
    .guide-steps {
        grid-template-columns: 1fr;
    }

    .pricing-table {
        font-size: 14px;
    }

    .pricing-table th,
    .pricing-table td {
        padding: 10px;
    }

    .cta-section h2 {
        font-size: 28px;
    }

    .cta-section p {
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 18px;
    }

    .nav {
        gap: 10px;
        font-size: 14px;
    }

    .hero h1 {
        font-size: 24px;
    }

    .hero p {
        font-size: 14px;
    }

    .coupon-section h2,
    .features h2,
    .how-to-use h2 {
        font-size: 24px;
    }

    .coupon-code {
        font-size: 18px;
    }

    .copy-btn {
        padding: 10px 20px;
        font-size: 14px;
    }

    .cta-button {
        padding: 12px 30px;
        font-size: 16px;
    }
}