/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans KR', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

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

/* Navigation */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.navbar {
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: #6366f1;
}

.nav-logo i {
    margin-right: 0.5rem;
    font-size: 1.8rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: #6366f1;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.highlight {
    color: #fbbf24;
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: #fbbf24;
    color: #1f2937;
}

.btn-primary:hover {
    background: #f59e0b;
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: #6366f1;
}

.btn-large {
    padding: 1.2rem 2.5rem;
    font-size: 1.1rem;
}

/* Phone Mockup */
.phone-mockup {
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-screen {
    width: 280px;
    height: 560px;
    background: #1f2937;
    border-radius: 30px;
    padding: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    position: relative;
}

.app-preview {
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, #667eea, #764ba2);
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.camera-icon {
    font-size: 3rem;
    color: white;
    margin-bottom: 2rem;
    animation: pulse 2s infinite;
}

.photo-stack {
    position: relative;
    width: 120px;
    height: 80px;
}

.photo {
    position: absolute;
    width: 100px;
    height: 60px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.photo-1 {
    top: 0;
    left: 0;
    transform: rotate(-5deg);
}

.photo-2 {
    top: 5px;
    left: 10px;
    transform: rotate(3deg);
}

.photo-3 {
    top: 10px;
    left: 20px;
    transform: rotate(-2deg);
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* Features Section */
.features {
    padding: 80px 0;
    background: #f8fafc;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: #1f2937;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.feature-icon i {
    font-size: 2rem;
    color: white;
}

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1f2937;
}

.feature-card p {
    color: #6b7280;
    line-height: 1.6;
}

/* Download Section */
.download {
    padding: 80px 0;
    background: white;
}

.download-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.download-info h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #1f2937;
}

.download-info p {
    font-size: 1.1rem;
    color: #6b7280;
    margin-bottom: 2rem;
}

.system-requirements {
    background: #f8fafc;
    padding: 1.5rem;
    border-radius: 12px;
}

.system-requirements h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1f2937;
}

.system-requirements ul {
    list-style: none;
}

.system-requirements li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    color: #6b7280;
}

.system-requirements i {
    color: #10b981;
}

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

.download-note {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: #6b7280;
    font-style: italic;
}

/* About Section */
.about {
    padding: 80px 0;
    background: #f8fafc;
}

.tech-stack {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.tech-item {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.tech-item:hover {
    transform: translateY(-3px);
}

.tech-item i {
    font-size: 2.5rem;
    color: #6366f1;
    margin-bottom: 1rem;
}

.tech-item span {
    font-weight: 600;
    color: #1f2937;
}

/* Footer */
.footer {
    background: #1f2937;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: #fbbf24;
}

.footer-section ul {
    list-style: none;
}

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

.footer-section a {
    color: #d1d5db;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #fbbf24;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #374151;
    color: #9ca3af;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        display: none;
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-buttons {
        justify-content: center;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .download-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .tech-stack {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .btn {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
    }

    .tech-stack {
        grid-template-columns: 1fr;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Loading Animation */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card,
.tech-item {
    animation: fadeInUp 0.6s ease forwards;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #6366f1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #4f46e5;
}

/* Privacy Policy Styles */
.privacy-policy {
    padding: 120px 0 80px;
    background: #f8fafc;
    min-height: 100vh;
}

.privacy-header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem;
    background: white;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.privacy-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 0.5rem;
}

.privacy-subtitle {
    font-size: 1.2rem;
    color: #6366f1;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.privacy-date {
    font-size: 0.9rem;
    color: #666;
    font-style: italic;
}

.privacy-content {
    background: white;
    border-radius: 15px;
    padding: 3rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    line-height: 1.8;
}

.privacy-section {
    margin-bottom: 2.5rem;
}

.privacy-section:last-child {
    margin-bottom: 0;
}

.privacy-section h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 3px solid #6366f1;
    display: inline-block;
}

.privacy-section h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #444;
    margin: 1.5rem 0 1rem 0;
}

.privacy-section p {
    margin-bottom: 1rem;
    color: #555;
}

.privacy-section ul {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.privacy-section li {
    margin-bottom: 0.5rem;
    color: #555;
    line-height: 1.6;
}

.highlight-box {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1.5rem;
    border-radius: 10px;
    margin: 1rem 0;
    text-align: center;
}

.highlight-box p {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
}

.privacy-footer {
    margin-top: 3rem;
    padding-top: 2rem;
    text-align: center;
    border-top: 2px solid #eee;
}

.privacy-footer hr {
    border: none;
    height: 1px;
    background: #ddd;
    margin: 2rem 0;
}

.privacy-footer p {
    margin-bottom: 0.5rem;
    color: #666;
}

/* Responsive Design for Privacy Policy */
@media (max-width: 768px) {
    .privacy-policy {
        padding: 100px 0 60px;
    }
    
    .privacy-header {
        padding: 1.5rem;
        margin-bottom: 2rem;
    }
    
    .privacy-title {
        font-size: 2rem;
    }
    
    .privacy-content {
        padding: 2rem;
    }
    
    .privacy-section h2 {
        font-size: 1.5rem;
    }
    
    .privacy-section h3 {
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .privacy-header {
        padding: 1rem;
    }
    
    .privacy-title {
        font-size: 1.8rem;
    }
    
    .privacy-content {
        padding: 1.5rem;
    }
    
    .privacy-section h2 {
        font-size: 1.3rem;
    }
    
    .privacy-section h3 {
        font-size: 1.1rem;
    }
    
    .highlight-box {
        padding: 1rem;
    }
    
    .highlight-box p {
        font-size: 1rem;
    }
}