:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --dark-color: #333;
    --light-color: #f4f4f4;
    --white: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, 'Helvetica Neue', 'Segoe UI', 'Apple SD Gothic Neo', 'Noto Sans KR', 'Malgun Gothic', 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: #fafafa;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Navigation */
header {
    background: var(--white);
    padding: 1rem 0;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--primary-color);
}

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

.nav-links li {
    margin-left: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 500;
    transition: color 0.3s;
}

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

.auth-buttons button {
    padding: 0.5rem 1rem;
    margin-left: 10px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 600;
    border: none;
    transition: all 0.3s;
}

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

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

.btn-signup:hover {
    background: #2980b9;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #3498db 0%, #8e44ad 100%);
    color: var(--white);
    padding: 80px 0;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

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

.search-box {
    background: var(--white);
    padding: 10px;
    border-radius: 50px;
    display: flex;
    max-width: 800px;
    margin: 0 auto;
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

.search-box input {
    flex: 1;
    padding: 15px 20px;
    border: none;
    outline: none;
    font-size: 1rem;
    background: transparent;
}

.btn-search {
    background: var(--primary-color);
    color: var(--white);
    padding: 0 30px;
    border-radius: 50px;
    border: none;
    cursor: pointer;
    font-weight: bold;
    transition: background 0.3s;
}

.btn-search:hover {
    background: #2980b9;
}

/* Job List */
.job-list {
    padding: 60px 0;
}

.job-list h2 {
    margin-bottom: 30px;
    font-size: 1.8rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
}

.job-card {
    background: var(--white);
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
    cursor: pointer;
}

.job-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.15);
}

.job-card .company {
    color: var(--primary-color);
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.job-card h3 {
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.job-card .location {
    color: #777;
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.job-card .tag {
    background: #eef2f7;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    color: #555;
}

/* Contact Section */
.contact-section {
    padding: 80px 20px;
    background: var(--white);
    border-radius: 20px;
    margin-top: 40px;
    margin-bottom: 40px;
    box-shadow: var(--shadow);
    text-align: center;
}

.contact-section h2 {
    margin-bottom: 10px;
}

.contact-section p {
    color: #666;
    margin-bottom: 40px;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    text-align: left;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

.form-group input, 
.form-group select, 
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
}

.form-group input:focus, 
.form-group select:focus, 
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.btn-submit {
    width: 100%;
    background: var(--primary-color);
    color: var(--white);
    padding: 15px;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.3s;
}

.btn-submit:hover {
    background: #2980b9;
}

/* Comments Section */
.comments-section {
    padding: 60px 20px;
    background: var(--white);
    border-radius: 20px;
    margin-bottom: 40px;
    box-shadow: var(--shadow);
}

.comments-section h2 {
    margin-bottom: 30px;
    text-align: center;
}

/* Footer */
footer {
    background: #333;
    color: var(--white);
    padding: 40px 0;
    text-align: center;
    margin-top: 60px;
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .hero h1 {
        font-size: 2rem;
    }
    .search-box {
        flex-direction: column;
        border-radius: 15px;
    }
    .btn-search {
        padding: 15px;
        margin-top: 10px;
    }
}