/* Basic Reset & Typography */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;700&display=swap');

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

body {
    font-family: 'Noto Sans KR', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f8f8;
}

.container {
    max-width: 1100px;
    margin: auto;
    padding: 0 1.5rem;
    overflow: hidden;
}

a {
    text-decoration: none;
    color: #007bff;
}

ul {
    list-style: none;
}

h1, h2, h3 {
    margin-bottom: 1rem;
    font-weight: 700;
    color: #222;
}

p {
    margin-bottom: 1rem;
}

/* Header & Navigation */
header {
    background-color: #fff;
    color: #333;
    padding: 1rem 0;
    border-bottom: 1px solid #eee;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

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

header .logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: #333;
}

header nav ul {
    display: flex;
}

header nav ul li {
    margin-left: 20px;
}

header nav ul li a {
    color: #555;
    font-weight: 400;
    transition: color 0.3s ease;
}

header nav ul li a:hover {
    color: #007bff;
}

/* Buttons */
.btn-primary {
    display: inline-block;
    background-color: #007bff;
    color: #fff;
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    transition: background-color 0.3s ease;
    margin-top: 1rem;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary:hover {
    background-color: #0056b3;
}

.btn-secondary {
    display: inline-block;
    background-color: #f0f0f0;
    color: #007bff;
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    transition: background-color 0.3s ease, color 0.3s ease;
    margin-top: 1rem;
    border: 1px solid #007bff;
    cursor: pointer;
    font-size: 1rem;
}

.btn-secondary:hover {
    background-color: #007bff;
    color: #fff;
}


/* Sections General */
section {
    padding: 4rem 0;
    text-align: center;
}

section:nth-of-type(even) {
    background-color: #f0f0f0;
}

section h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('https://via.placeholder.com/1500x800/007bff/ffffff?text=Hero+Image') no-repeat center center/cover; /* Placeholder image */
    color: #fff;
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-section p {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.hero-section h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    color: #fff;
}


/* Services Section */
.service-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.service-item {
    background-color: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    text-align: left;
}

.service-item h3 {
    color: #007bff;
    font-size: 1.5rem;
    margin-bottom: 0.8rem;
}


/* About Section (Differentiation) */
.feature-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature-item {
    background-color: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    text-align: left;
}

.feature-item h3 {
    color: #28a745; /* Green accent */
    font-size: 1.6rem;
    margin-bottom: 0.8rem;
}

/* Problems Section */
.problems-section ul {
    max-width: 700px;
    margin: 2rem auto;
    text-align: left;
}

.problems-section ul li {
    background-color: #fff;
    padding: 1rem 1.5rem;
    margin-bottom: 0.8rem;
    border-left: 5px solid #ffc107; /* Yellow accent */
    border-radius: 5px;
    font-size: 1.1rem;
    color: #555;
    box-shadow: 0 2px 5px rgba(0,0,0,0.03);
}

.problems-section .cta-text {
    font-size: 1.3rem;
    font-weight: 700;
    margin-top: 3rem;
    color: #007bff;
}

/* Contact Section */
.contact-section form {
    max-width: 600px;
    margin: 2rem auto;
    background-color: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    text-align: left;
}

.contact-section form input[type="text"],
.contact-section form input[type="email"],
.contact-section form textarea {
    width: 100%;
    padding: 0.8rem;
    margin-bottom: 1rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: 'Noto Sans KR', sans-serif;
    font-size: 1rem;
}

.contact-section .contact-info {
    margin-top: 2rem;
    font-size: 1.1rem;
    color: #555;
}

/* Footer */
footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 1.5rem 0;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
    }
    header nav ul {
        margin-top: 1rem;
    }
    header nav ul li {
        margin: 0 10px;
    }
    .hero-section h1 {
        font-size: 2.5rem;
    }
    section h2 {
        font-size: 2rem;
    }
    .service-item, .feature-item {
        text-align: center;
    }
}