/* ==========================================
   Global Variables & Reset
   ========================================== */
:root {
    --primary-gold: #FFD700;
    --deep-gold: #FFA500;
    --dark-navy: #0A1930;
    --light-navy: #1a2942;
    --accent-white: #FFFFFF;
    --text-gray: #E5E5E5;
    --text-light: #B0B0B0;
    --gradient-gold: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
    --gradient-dark: linear-gradient(135deg, #0A1930 0%, #1a2942 100%);
    --shadow-gold: 0 10px 40px rgba(255, 215, 0, 0.3);
    --shadow-dark: 0 10px 40px rgba(10, 25, 48, 0.4);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--accent-white);
    background: var(--dark-navy);
    overflow-x: hidden;
}

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

/* ==========================================
   Hero Section
   ========================================== */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0A1930 0%, #1a2942 50%, #2a3952 100%);
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 215, 0, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 165, 0, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 60px 20px;
    max-width: 900px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    padding: 12px 30px;
    background: var(--gradient-gold);
    color: var(--dark-navy);
    border-radius: 50px;
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 30px;
    box-shadow: var(--shadow-gold);
    animation: pulse 2s ease-in-out infinite;
}

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

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 30px;
    color: var(--accent-white);
}

.gold-text {
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.3rem;
    line-height: 1.8;
    color: var(--text-gray);
    margin-bottom: 50px;
}

.highlight-text {
    color: var(--primary-gold);
    font-weight: 700;
    font-size: 1.4rem;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin: 50px 0;
}

.stat-item {
    padding: 30px 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    border: 2px solid rgba(255, 215, 0, 0.2);
    transition: all 0.3s ease;
}

.stat-item:hover {
    background: rgba(255, 215, 0, 0.1);
    border-color: var(--primary-gold);
    transform: translateY(-5px);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--primary-gold);
    margin-bottom: 10px;
}

.stat-label {
    font-size: 1rem;
    color: var(--text-gray);
}

.cta-button-hero {
    display: inline-block;
    padding: 20px 50px;
    background: var(--gradient-gold);
    color: var(--dark-navy);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.3rem;
    box-shadow: var(--shadow-gold);
    transition: all 0.3s ease;
    margin-top: 30px;
}

.cta-button-hero:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 50px rgba(255, 215, 0, 0.5);
}

/* ==========================================
   Problem Section
   ========================================== */
.problem-section {
    padding: 100px 0;
    background: var(--light-navy);
}

.section-title {
    font-size: 2.8rem;
    font-weight: 900;
    text-align: center;
    margin-bottom: 20px;
    color: var(--accent-white);
}

.section-subtitle {
    font-size: 1.2rem;
    text-align: center;
    color: var(--text-gray);
    margin-bottom: 60px;
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.problem-card {
    padding: 40px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 20px;
    border: 2px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.problem-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 215, 0, 0.3);
    transform: translateY(-5px);
}

.problem-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.problem-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--primary-gold);
}

.problem-card p {
    color: var(--text-gray);
    line-height: 1.8;
}

/* ==========================================
   Solution Section
   ========================================== */
.solution-section {
    padding: 100px 0;
    background: var(--dark-navy);
}

.solution-showcase {
    max-width: 900px;
    margin: 0 auto;
}

.showcase-item {
    display: flex;
    gap: 30px;
    margin-bottom: 60px;
    padding: 40px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 20px;
    border-left: 5px solid var(--primary-gold);
    transition: all 0.3s ease;
}

.showcase-item:hover {
    background: rgba(255, 215, 0, 0.05);
    transform: translateX(10px);
}

.showcase-number {
    font-size: 3rem;
    font-weight: 900;
    color: var(--primary-gold);
    min-width: 80px;
}

.showcase-content h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    color: var(--accent-white);
}

.showcase-content p {
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 20px;
}

.feature-tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.tag {
    padding: 8px 16px;
    background: rgba(255, 215, 0, 0.2);
    color: var(--primary-gold);
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

.feature-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.feature-item {
    color: var(--text-gray);
    padding: 8px 0;
}

/* ==========================================
   Technology Section
   ========================================== */
.technology-section {
    padding: 100px 0;
    background: var(--light-navy);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.tech-card {
    padding: 40px 30px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 20px;
    text-align: center;
    border: 2px solid rgba(255, 215, 0, 0.2);
    transition: all 0.3s ease;
}

.tech-card:hover {
    background: rgba(255, 215, 0, 0.1);
    border-color: var(--primary-gold);
    transform: translateY(-10px);
}

.tech-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.tech-card h3 {
    font-size: 1.3rem;
    color: var(--primary-gold);
    margin-bottom: 15px;
}

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

/* ==========================================
   Use Case Section
   ========================================== */
.usecase-section {
    padding: 100px 0;
    background: var(--dark-navy);
}

.usecase-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.usecase-card {
    padding: 40px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 20px;
    border: 2px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.usecase-card:hover {
    background: rgba(255, 215, 0, 0.05);
    border-color: var(--primary-gold);
}

.usecase-emoji {
    font-size: 3rem;
    margin-bottom: 20px;
}

.usecase-card h3 {
    font-size: 1.5rem;
    color: var(--primary-gold);
    margin-bottom: 20px;
}

.usecase-card ul {
    list-style: none;
}

.usecase-card li {
    color: var(--text-gray);
    padding: 10px 0;
    padding-left: 25px;
    position: relative;
}

.usecase-card li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary-gold);
    font-weight: bold;
}

/* ==========================================
   Comparison Section
   ========================================== */
.comparison-section {
    padding: 100px 0;
    background: var(--light-navy);
}

.comparison-table {
    max-width: 1000px;
    margin: 0 auto;
}

.comparison-header {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.comparison-header .comparison-col {
    padding: 30px;
    text-align: center;
    font-size: 1.3rem;
    font-weight: 700;
    border-radius: 15px;
    background: rgba(255, 255, 255, 0.05);
}

.comparison-header .highlight {
    background: var(--gradient-gold);
    color: var(--dark-navy);
}

.comparison-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 15px;
}

.comparison-col {
    padding: 25px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.comparison-col.old {
    background: rgba(255, 255, 255, 0.03);
    border: 2px solid rgba(255, 255, 255, 0.1);
}

.comparison-col.new {
    background: rgba(255, 215, 0, 0.1);
    border: 2px solid var(--primary-gold);
}

.comparison-col .icon {
    font-size: 1.5rem;
    min-width: 30px;
}

.comparison-col div:last-child {
    color: var(--text-gray);
}

.comparison-col.new div:last-child {
    color: var(--accent-white);
    font-weight: 600;
}

/* ==========================================
   How to Use Section
   ========================================== */
.howto-section {
    padding: 100px 0;
    background: var(--dark-navy);
}

.howto-steps {
    max-width: 1000px;
    margin: 0 auto;
}

.howto-step {
    margin-bottom: 50px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 20px;
    overflow: hidden;
    border: 2px solid rgba(255, 215, 0, 0.2);
    transition: all 0.3s ease;
}

.howto-step:hover {
    border-color: var(--primary-gold);
    box-shadow: 0 10px 40px rgba(255, 215, 0, 0.2);
}

.step-header {
    background: var(--gradient-gold);
    padding: 30px 40px;
    display: flex;
    align-items: center;
    gap: 20px;
}

.step-number {
    font-size: 1rem;
    font-weight: 700;
    color: var(--dark-navy);
    background: rgba(10, 25, 48, 0.2);
    padding: 8px 20px;
    border-radius: 20px;
}

.step-header h3 {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--dark-navy);
    margin: 0;
}

.step-content {
    padding: 40px;
}

.step-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.visual-box {
    padding: 30px;
    background: rgba(255, 215, 0, 0.1);
    border: 2px solid rgba(255, 215, 0, 0.3);
    border-radius: 15px;
    text-align: center;
    min-width: 150px;
    transition: all 0.3s ease;
}

.visual-box.highlight {
    background: var(--gradient-gold);
    border-color: var(--primary-gold);
    transform: scale(1.05);
}

.visual-box.highlight .visual-text {
    color: var(--dark-navy);
    font-weight: 700;
}

.visual-box:hover {
    transform: translateY(-5px);
}

.visual-icon {
    font-size: 3rem;
    margin-bottom: 10px;
}

.visual-text {
    font-size: 0.95rem;
    color: var(--text-gray);
    line-height: 1.4;
}

.visual-arrow {
    font-size: 2rem;
    color: var(--primary-gold);
    font-weight: bold;
}

.step-description {
    color: var(--text-gray);
}

.step-main {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--accent-white);
    margin-bottom: 20px;
}

.step-details {
    list-style: none;
    margin-bottom: 20px;
}

.step-details li {
    padding: 10px 0;
    padding-left: 30px;
    position: relative;
    line-height: 1.6;
}

.step-details li:before {
    content: "▸";
    position: absolute;
    left: 0;
    color: var(--primary-gold);
    font-weight: bold;
    font-size: 1.2rem;
}

.step-details strong {
    color: var(--primary-gold);
}

.step-tip {
    background: rgba(255, 215, 0, 0.1);
    border-left: 4px solid var(--primary-gold);
    padding: 15px 20px;
    border-radius: 8px;
    font-size: 0.95rem;
    color: var(--text-gray);
}

.step-tip strong {
    color: var(--primary-gold);
}

.howto-cta {
    text-align: center;
    margin-top: 80px;
    padding: 60px 40px;
    background: rgba(255, 215, 0, 0.05);
    border-radius: 20px;
    border: 3px solid var(--primary-gold);
}

.howto-cta h3 {
    font-size: 2rem;
    color: var(--accent-white);
    margin-bottom: 15px;
}

.howto-cta p {
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 30px;
}

.howto-cta strong {
    color: var(--primary-gold);
    font-size: 1.4rem;
}

.howto-cta-button {
    display: inline-block;
    padding: 20px 50px;
    background: var(--gradient-gold);
    color: var(--dark-navy);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 900;
    font-size: 1.3rem;
    box-shadow: var(--shadow-gold);
    transition: all 0.3s ease;
}

.howto-cta-button:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 50px rgba(255, 215, 0, 0.5);
}

/* ==========================================
   Benefits Section
   ========================================== */
.benefits-section {
    padding: 100px 0;
    background: var(--light-navy);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.benefit-card {
    padding: 40px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 20px;
    border: 2px solid rgba(255, 215, 0, 0.2);
    transition: all 0.3s ease;
}

.benefit-card:hover {
    background: rgba(255, 215, 0, 0.05);
    transform: translateY(-5px);
    border-color: var(--primary-gold);
}

.benefit-number {
    display: inline-block;
    padding: 10px 20px;
    background: var(--gradient-gold);
    color: var(--dark-navy);
    border-radius: 50px;
    font-weight: 700;
    margin-bottom: 20px;
}

.benefit-card h3 {
    font-size: 1.5rem;
    color: var(--primary-gold);
    margin-bottom: 15px;
}

.benefit-card p {
    color: var(--text-gray);
    line-height: 1.8;
}

/* ==========================================
   CTA Section
   ========================================== */
.cta-section {
    padding: 100px 0;
    background: var(--light-navy);
}

.cta-box {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    padding: 80px 40px;
    background: rgba(255, 215, 0, 0.05);
    border-radius: 30px;
    border: 3px solid var(--primary-gold);
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 30px;
    line-height: 1.3;
}

.cta-text {
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 40px;
    line-height: 1.8;
}

.cta-button-large {
    display: inline-flex;
    align-items: center;
    gap: 20px;
    padding: 25px 60px;
    background: var(--gradient-gold);
    color: var(--dark-navy);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 900;
    font-size: 1.5rem;
    box-shadow: var(--shadow-gold);
    transition: all 0.3s ease;
}

.cta-button-large:hover {
    transform: scale(1.05);
    box-shadow: 0 20px 60px rgba(255, 215, 0, 0.5);
}

.cta-button-arrow {
    font-size: 2rem;
}

.cta-note {
    margin-top: 20px;
    color: var(--text-light);
    font-size: 0.95rem;
}

/* ==========================================
   Footer
   ========================================== */
.footer {
    background: var(--dark-navy);
    padding: 60px 0 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    color: var(--primary-gold);
    font-size: 1.2rem;
    margin-bottom: 15px;
}

.footer-section p {
    color: var(--text-gray);
    line-height: 1.8;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-light);
}

/* ==========================================
   Floating CTA Button
   ========================================== */
.floating-cta {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 9999;
    animation: float-bounce 3s ease-in-out infinite;
}

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

.floating-cta-button {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 18px 30px;
    background: var(--gradient-gold);
    color: var(--dark-navy);
    text-decoration: none;
    border-radius: 50px;
    box-shadow: 0 8px 30px rgba(255, 165, 0, 0.4);
    transition: all 0.3s ease;
    font-weight: 700;
    font-size: 1.2rem;
    cursor: pointer;
}

.floating-cta-button:hover {
    transform: scale(1.1);
    box-shadow: 0 12px 40px rgba(255, 165, 0, 0.6);
}

.floating-cta-button:hover + .floating-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateX(-10px);
}

.floating-icon {
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--dark-navy);
    color: var(--primary-gold);
    border-radius: 50%;
    padding: 6px;
}

.floating-text {
    font-size: 1.2rem;
    font-weight: 700;
    white-space: nowrap;
}

.floating-tooltip {
    position: absolute;
    right: 100%;
    top: 50%;
    transform: translateY(-50%) translateX(10px);
    background: var(--dark-navy);
    color: var(--accent-white);
    padding: 12px 20px;
    border-radius: 10px;
    font-size: 0.9rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-dark);
    pointer-events: none;
    margin-right: 15px;
    text-align: center;
    line-height: 1.5;
}

.floating-tooltip::after {
    content: '';
    position: absolute;
    right: -8px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 8px 0 8px 8px;
    border-color: transparent transparent transparent var(--dark-navy);
}

/* ==========================================
   Responsive Design
   ========================================== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.8rem;
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .benefits-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .problem-grid,
    .usecase-grid,
    .comparison-row,
    .comparison-header {
        grid-template-columns: 1fr;
    }
    
    .hero-stats,
    .tech-grid,
    .benefits-grid {
        grid-template-columns: 1fr;
    }
    
    .showcase-item {
        flex-direction: column;
        text-align: center;
    }
    
    .feature-list {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    /* How to Use Responsive */
    .step-header {
        flex-direction: column;
        text-align: center;
        padding: 25px 30px;
    }
    
    .step-header h3 {
        font-size: 1.5rem;
    }
    
    .step-content {
        padding: 30px 25px;
    }
    
    .step-visual {
        flex-direction: column;
    }
    
    .visual-arrow {
        transform: rotate(90deg);
    }
    
    .visual-box {
        min-width: 100%;
    }
    
    .step-main {
        font-size: 1.1rem;
    }
    
    .howto-cta {
        padding: 40px 25px;
    }
    
    .howto-cta h3 {
        font-size: 1.6rem;
    }
    
    .howto-cta p {
        font-size: 1.1rem;
    }
    
    .floating-cta {
        bottom: 20px;
        right: 20px;
    }
    
    .floating-cta-button {
        padding: 14px 20px;
        font-size: 1rem;
    }
    
    .floating-text {
        font-size: 1rem;
    }
    
    .floating-tooltip {
        display: none;
    }
    
    .cta-button-large {
        padding: 20px 40px;
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 1.6rem;
    }
    
    .cta-title {
        font-size: 1.8rem;
    }
    
    .floating-cta {
        bottom: 15px;
        right: 15px;
    }
    
    .floating-cta-button {
        padding: 12px 16px;
        font-size: 0.9rem;
    }
}