:root {
    --primary-color: #0f172a; /* Deep Navy */
    --secondary-color: #1e293b; /* Lighter Navy */
    --accent-color: #d4af37; /* Gold */
    --accent-hover: #b5952f;
    --text-light: #f3f4f6;
    --text-dark: #333333;
    --bg-light: #f8f9fa;
    --white: #ffffff;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

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

body {
    font-family: 'Noto Serif KR', serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
}

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

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

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

.section-padding {
    padding: 80px 0;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.section-header p {
    color: #666;
    font-size: 1.1rem;
}

/* Typography */
h1, h2, h3 {
    font-weight: 700;
    line-height: 1.3;
}

p {
    margin-bottom: 1rem;
}

.divider {
    width: 60px;
    height: 3px;
    background-color: var(--accent-color);
    margin: 20px auto;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 15px 30px;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: 'Noto Serif KR', serif;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-color) 0%, #c5a028 100%);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(212, 175, 55, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(212, 175, 55, 0.4);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--white);
    color: var(--white);
}

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

.small-text {
    display: block;
    font-size: 0.8rem;
    font-weight: 400;
    opacity: 0.9;
    margin-top: 2px;
}

/* Navigation */
.navbar {
    background-color: rgba(15, 23, 42, 0.95);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

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

.logo {
    color: var(--white);
    font-size: 1.5rem;
    font-weight: 700;
}

.logo span {
    color: var(--accent-color);
    font-weight: 400;
    font-size: 1rem;
}

.nav-cta {
    background-color: var(--accent-color);
    color: var(--white);
    border: none;
    padding: 8px 20px;
    border-radius: 4px;
    font-family: 'Noto Serif KR', serif;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.nav-cta:hover {
    background-color: var(--accent-hover);
}

/* Hero Section */
.hero {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 50px;
}

.hero-content {
    flex: 1;
}

.hero-badge {
    display: inline-block;
    background-color: rgba(212, 175, 55, 0.2);
    color: var(--accent-color);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    margin-bottom: 20px;
    border: 1px solid rgba(212, 175, 55, 0.5);
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    color: var(--white);
}

.hero-desc {
    font-size: 1.2rem;
    color: #cbd5e1;
    margin-bottom: 40px;
}

.hero-image {
    flex: 1;
    text-align: right;
}

.hero-image img {
    max-width: 100%;
    border-radius: 10px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
    border: 1px solid rgba(255,255,255,0.1);
}

/* Profile Section */
.profile-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 50px;
    align-items: center;
    margin-top: 50px;
}

.profile-img img {
    width: 100%;
    border-radius: 5px;
    box-shadow: var(--shadow);
}

.profile-text h3 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.profile-specs {
    list-style: none;
    margin-top: 30px;
    background-color: var(--bg-light);
    padding: 20px;
    border-radius: 5px;
    border-left: 4px solid var(--accent-color);
}

.profile-specs li {
    margin-bottom: 10px;
    font-weight: 600;
    color: var(--secondary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.profile-specs li:last-child {
    margin-bottom: 0;
}

.profile-specs i {
    color: var(--accent-color);
}

/* Content Blocks (Zig-Zag Layout) */
.content-block {
    overflow: hidden;
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.content-text h3 {
    font-size: 2.2rem;
    margin-bottom: 20px;
    color: var(--primary-color);
    line-height: 1.3;
}

.content-text p {
    color: #555;
    margin-bottom: 25px;
    font-size: 1.05rem;
}

.content-img {
    position: relative;
}

.content-img img {
    width: 100%;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease;
}

.content-img:hover img {
    transform: scale(1.02);
}

.section-tag {
    display: inline-block;
    color: var(--accent-color);
    font-weight: 700;
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
    border-bottom: 2px solid rgba(212, 175, 55, 0.3);
    padding-bottom: 5px;
}

.check-list {
    list-style: none;
    margin-top: 20px;
}

.check-list li {
    margin-bottom: 12px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    color: var(--secondary-color);
    font-weight: 500;
}

.check-list li i {
    color: var(--accent-color);
    font-size: 0.9rem;
    background-color: rgba(212, 175, 55, 0.1);
    min-width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 2px;
}

/* Features Section */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 50px;
}

.feature-card {
    background-color: var(--white);
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
}

.icon-box {
    width: 80px;
    height: 80px;
    background-color: var(--bg-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: var(--accent-color);
    font-size: 2rem;
}

.feature-card h3 {
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.feature-card p {
    color: #666;
    font-size: 0.95rem;
}

/* Guide Section */
.guide {
    background-color: var(--secondary-color);
    color: var(--white);
}

.guide-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 50px;
}

.guide-content {
    flex: 1;
}

.guide-content .tag {
    background-color: var(--accent-color);
    color: var(--white);
    padding: 5px 10px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 15px;
    display: inline-block;
}

.guide-content h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.highlight-text {
    font-size: 1.5rem;
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 20px;
}

.disclaimer-box {
    background-color: rgba(255,255,255,0.1);
    padding: 15px;
    border-radius: 5px;
    font-size: 0.85rem;
    color: #cbd5e1;
    margin-bottom: 30px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.guide-image {
    flex: 1;
    text-align: center;
}

.guide-image img {
    max-width: 300px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
    transform: rotate(-5deg);
    transition: transform 0.3s ease;
}

.guide-image:hover img {
    transform: rotate(0deg) scale(1.05);
}

/* CTA Strip */
.cta-strip {
    background: linear-gradient(to right, #0f172a, #1e293b);
    color: var(--white);
}

.cta-strip h2 {
    font-size: 2.2rem;
    margin-bottom: 15px;
}

.cta-strip p {
    font-size: 1.1rem;
    margin-bottom: 30px;
    color: #cbd5e1;
}

/* Footer */
.footer {
    background-color: #0a0f1d;
    color: #94a3b8;
    padding: 60px 0 120px;
    text-align: center;
    font-size: 0.9rem;
}

.footer-logo {
    color: var(--white);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-logo span {
    color: var(--accent-color);
}

.footer-desc {
    max-width: 600px;
    margin: 0 auto 30px;
    line-height: 1.8;
}

.footer-links {
    margin-bottom: 20px;
}

.footer-links a {
    color: #cbd5e1;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: var(--accent-color);
}

.separator {
    margin: 0 10px;
    color: #475569;
}

.copyright {
    margin-top: 20px;
    font-size: 0.85rem;
    color: #64748b;
}

/* Fixed Bottom Button */
.fixed-bottom-cta {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 9999;
    width: 90%;
    max-width: 500px;
}

.fixed-bottom-cta button {
    width: 100%;
    padding: 16px 24px;
    background: linear-gradient(135deg, var(--accent-color) 0%, #b5952f 100%);
    color: var(--white);
    border: none;
    border-radius: 50px;
    font-size: 1.05rem;
    font-weight: 700;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: 'Noto Serif KR', serif;
    animation: pulse 2s infinite;
    transition: all 0.3s ease;
}

.fixed-bottom-cta button:hover {
    transform: scale(1.02);
}

.fixed-bottom-cta button i {
    font-size: 1.2rem;
}

.fixed-bottom-cta small {
    font-weight: 400;
    font-size: 0.75rem;
    opacity: 0.9;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(212, 175, 55, 0.7); }
    70% { box-shadow: 0 0 0 15px rgba(212, 175, 55, 0); }
    100% { box-shadow: 0 0 0 0 rgba(212, 175, 55, 0); }
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.7);
    z-index: 10000;
    display: none;
}

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 600px;
    background-color: var(--white);
    border-radius: 10px;
    padding: 30px;
    z-index: 10001;
    display: none;
    max-height: 80vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    border-bottom: 1px solid #eee;
    padding-bottom: 10px;
}

.modal-header h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.modal-body {
    line-height: 1.8;
}

.modal-body p {
    margin-bottom: 15px;
}

.close-btn {
    font-size: 2rem;
    cursor: pointer;
    color: #999;
    transition: color 0.3s;
    line-height: 1;
}

.close-btn:hover {
    color: var(--primary-color);
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */

/* Tablet (768px - 1024px) */
@media (max-width: 1024px) {
    .hero h1 {
        font-size: 3rem;
    }
    
    .content-text h3 {
        font-size: 2rem;
    }
}

/* Mobile (max-width: 768px) */
@media (max-width: 768px) {
    .section-padding {
        padding: 50px 0;
    }

    .container {
        padding: 0 15px;
    }

    /* Navbar */
    .logo {
        font-size: 1.3rem;
    }

    .logo span {
        font-size: 0.9rem;
    }

    .nav-cta {
        padding: 6px 14px;
        font-size: 0.85rem;
    }

    /* Hero */
    .hero {
        padding: 60px 0;
    }
    
    .hero h1 { 
        font-size: 2rem;
        word-break: keep-all;
    }
    
    .hero .container {
        flex-direction: column;
        text-align: center;
        gap: 30px;
    }

    .hero-desc {
        font-size: 1.05rem;
        margin-bottom: 30px;
    }

    .hero-image {
        width: 100%;
        text-align: center;
    }

    /* Section Headers */
    .section-header h2 {
        font-size: 1.8rem;
    }

    .section-header p {
        font-size: 1rem;
    }

    /* Profile */
    .profile-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .profile-text {
        text-align: center;
    }
    
    .profile-text h3 {
        font-size: 1.5rem;
    }

    .profile-specs {
        text-align: left;
        padding: 15px;
        margin: 20px auto 0;
        max-width: 400px;
    }
    
    /* Content Blocks */
    .content-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .content-text {
        text-align: center;
    }
    
    .content-text h3 {
        font-size: 1.6rem;
        word-break: keep-all;
    }
    
    .content-text p {
        font-size: 1rem;
    }
    
    .check-list {
        text-align: left;
        display: inline-block; 
        max-width: 100%;
    }

    /* Features */
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    /* Guide */
    .guide-container {
        flex-direction: column;
        gap: 30px;
    }
    
    .guide-content h2 {
        font-size: 1.8rem;
    }
    
    .highlight-text {
        font-size: 1.2rem;
    }

    .guide-image img {
        max-width: 250px;
    }

    /* CTA Strip */
    .cta-strip h2 {
        font-size: 1.8rem;
    }

    .cta-strip p {
        font-size: 1rem;
    }

    /* Footer */
    .footer {
        padding-bottom: 110px;
    }
    
    .footer-links {
        display: flex;
        flex-direction: column;
        gap: 10px;
    }
    
    .footer-links .separator {
        display: none;
    }

    /* Fixed Bottom Button */
    .fixed-bottom-cta {
        width: 94%;
        bottom: 15px;
    }
    
    .fixed-bottom-cta button {
        padding: 14px 20px;
        font-size: 0.95rem;
        border-radius: 40px;
        flex-wrap: wrap;
    }
    
    .fixed-bottom-cta small {
        font-size: 0.7rem;
    }
}

/* Extra Small Mobile (max-width: 480px) */
@media (max-width: 480px) {
    .hero h1 { 
        font-size: 1.7rem; 
    }
    
    .hero-desc {
        font-size: 0.95rem;
    }
    
    .content-text h3 { 
        font-size: 1.4rem; 
    }
    
    .section-header h2 {
        font-size: 1.6rem;
    }
    
    .fixed-bottom-cta button { 
        font-size: 0.9rem; 
        padding: 12px 18px; 
    }
    
    .fixed-bottom-cta small {
        display: none;
    }
}