:root {
    --primary-color: #2563eb; /* Vivid Blue */
    --secondary-color: #1e293b; /* Slate 800 */
    --accent-color: #f59e0b; /* Amber 500 */
    --text-main: #334155; /* Slate 700 */
    --text-light: #64748b; /* Slate 500 */
    --bg-light: #f8fafc; /* Slate 50 */
    --white: #ffffff;
    --border-color: #e2e8f0;
}

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

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

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s;
}

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header */
header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-menu {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.nav-menu a {
    font-weight: 500;
    font-size: 1rem;
    color: var(--secondary-color);
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.btn-login {
    padding: 0.6rem 1.5rem;
    border: 1px solid var(--primary-color);
    border-radius: 6px;
    color: var(--primary-color);
    font-weight: 600;
}

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

/* Hero Section */
.hero {
    padding: 6rem 0;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
    line-height: 1.2;
    word-break: keep-all;
}

.hero h1 span {
    color: var(--primary-color);
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-btns {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 1rem 2.5rem;
    border-radius: 8px;
    font-weight: 700;
    font-size: 1.1rem;
    transition: transform 0.2s, background-color 0.2s;
}

.btn-primary:hover {
    background-color: #1d4ed8;
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    padding: 1rem 2.5rem;
    border-radius: 8px;
    font-weight: 700;
    font-size: 1.1rem;
}

.btn-outline:hover {
    background-color: #eff6ff;
}

/* Stats Section */
.stats {
    background-color: var(--secondary-color);
    color: var(--white);
    padding: 3rem 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    text-align: center;
    gap: 2rem;
}

.stat-item h3 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}

.stat-item p {
    font-size: 1rem;
    opacity: 0.9;
}

/* Section Common */
section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-light);
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2.5rem;
    transition: box-shadow 0.3s;
}

.feature-card:hover {
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    border-color: var(--primary-color);
}

.feature-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.6;
}

/* Comparison / Why Us */
.why-section {
    background-color: var(--bg-light);
}

.comparison-box {
    background: var(--white);
    border-radius: 20px;
    padding: 4rem;
    box-shadow: 0 20px 40px rgba(0,0,0,0.05);
    max-width: 900px;
    margin: 0 auto;
}

.pain-point {
    text-align: center;
    margin-bottom: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid var(--border-color);
}

.pain-title {
    font-size: 1.5rem;
    color: #ef4444; /* Red */
    font-weight: 700;
    margin-bottom: 1rem;
}

.pain-desc {
    font-size: 1.1rem;
    color: var(--text-light);
}

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

.solution-title {
    font-size: 1.8rem;
    color: var(--primary-color);
    font-weight: 800;
    margin-bottom: 1rem;
}

.solution-desc {
    font-size: 1.2rem;
    color: var(--secondary-color);
    font-weight: 500;
}

/* Detail Sections */
.detail-row {
    display: flex;
    align-items: center;
    gap: 4rem;
    margin-bottom: 6rem;
}

.detail-row:nth-child(even) {
    flex-direction: row-reverse;
}

.detail-content {
    flex: 1;
}

.detail-image {
    flex: 1;
}

.detail-image img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.detail-label {
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 0.5rem;
    display: block;
}

.detail-content h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

.detail-content p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.check-list li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--secondary-color);
}

.check-list li i {
    color: var(--primary-color);
}

/* CTA Section */
.cta-section {
    background: var(--secondary-color);
    color: var(--white);
    text-align: center;
    padding: 6rem 1rem;
}

.cta-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.cta-section p {
    font-size: 1.2rem;
    opacity: 0.8;
    margin-bottom: 3rem;
}

/* Footer */
footer {
    background: #0f172a;
    color: #94a3b8;
    padding: 4rem 0;
    font-size: 0.9rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.footer-col h4 {
    color: var(--white);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.footer-col ul li {
    margin-bottom: 0.5rem;
}

.footer-col ul li a:hover {
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid #1e293b;
    padding-top: 2rem;
    text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .nav-menu {
        display: none; /* Mobile menu hidden for simplicity */
    }
    
    .detail-row, .detail-row:nth-child(even) {
        flex-direction: column;
        gap: 2rem;
    }
    
    .header-inner {
        justify-content: space-between;
    }
}