:root {
    --primary-color: #0078D4; /* Azure Blue - Matching the App */
    --secondary-color: #115EA3;
    --accent-color: #ffd700;
    --bg-light: #F3F3F3;
    --text-dark: #333333;
    --text-muted: #666666;
    --white: #ffffff;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
    background-color: var(--white);
    color: var(--text-dark);
    line-height: 1.6;
}

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

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    z-index: 1000;
    padding: 15px 0;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition);
}

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

/* Hero Section */
.hero-section {
    padding: 160px 0 100px;
    background: linear-gradient(135deg, #f0f7ff 0%, #e1effe 100%);
}

.hero-section .container {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    align-items: center;
    gap: 50px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 25px;
}

.highlight {
    color: var(--primary-color);
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 40px;
}

.hero-btns {
    display: flex;
    gap: 15px;
}

.btn {
    padding: 15px 35px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
}

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

.btn-primary:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
}

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

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

/* App Mockup */
.app-mockup {
    background: #333;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
    border: 1px solid #444;
}

.mockup-header {
    background: #222;
    padding: 10px 15px;
    display: flex;
    gap: 8px;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.dot:nth-child(1) { background: #ff5f56; }
.dot:nth-child(2) { background: #ffbd2e; }
.dot:nth-child(3) { background: #27c93f; }

.mockup-body {
    padding: 20px;
    background: #fff;
    min-height: 250px;
}

.mockup-sheet table {
    width: 100%;
    border-collapse: collapse;
}

.mockup-sheet th, .mockup-sheet td {
    border: 1px solid #ddd;
    padding: 12px;
    text-align: center;
    font-size: 0.9rem;
}

.mockup-sheet th {
    background: #F3F3F3;
    color: #666;
}

/* Sections */
.section {
    padding: 100px 0;
}

.section-title {
    font-size: 2.2rem;
    text-align: center;
    margin-bottom: 60px;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    padding: 40px;
    background: var(--white);
    border-radius: 15px;
    border: 1px solid #eee;
    transition: var(--transition);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.05);
    border-color: var(--primary-color);
}

.feature-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 25px;
}

.feature-card h3 {
    margin-bottom: 15px;
    font-size: 1.4rem;
}

.feature-card p {
    color: var(--text-muted);
}

/* Steps Flow */
.steps-flow {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
}

.step {
    position: relative;
    text-align: center;
}

.step-num {
    font-size: 3rem;
    font-weight: 800;
    color: rgba(0, 120, 212, 0.1);
    margin-bottom: -20px;
}

.step h4 {
    font-size: 1.25rem;
    margin-bottom: 15px;
    position: relative;
}

.step p {
    color: var(--text-muted);
}

/* Contact Section */
.contact-section {
    background-color: var(--bg-light);
}

.contact-card {
    background: var(--white);
    border-radius: 20px;
    padding: 60px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.contact-desc {
    margin-bottom: 40px;
    color: var(--text-muted);
    font-size: 1.1rem;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
}

.info-item i {
    color: var(--primary-color);
    font-size: 1.4rem;
}

.info-item.kakao a {
    color: #3A1D1D;
    background: #FEE500;
    padding: 10px 20px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 700;
}

.auth-notice {
    padding-top: 30px;
    border-top: 1px solid #eee;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Footer */
.footer {
    padding: 50px 0;
    background: #111;
    color: #888;
    text-align: center;
}

.footer p:first-child {
    color: var(--white);
    margin-bottom: 10px;
}

@media (max-width: 992px) {
    .hero-section .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-title { font-size: 2.8rem; }
    .hero-btns { justify-content: center; }
    .hero-image { display: none; }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .hero-title { font-size: 2.2rem; }
}