:root {
    --background-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --card-background: rgba(255, 255, 255, 0.1);
    --text-color: #ffffff;
    --text-muted: rgba(255, 255, 255, 0.7);
    --button-background: #ff6b6b;
    --button-hover-background: #ff8e8e;
    --button-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
    --number-background: #ffffff;
    --number-color: #333333;
    --input-background: rgba(255, 255, 255, 0.15);
    --input-text: #ffffff;
    --accent-color: #f6d365;
}

[data-theme="dark"] {
    --background-gradient: linear-gradient(135deg, #0f2027 0%, #203a43 50%, #2c5364 100%);
    --card-background: rgba(0, 0, 0, 0.3);
    --text-color: #f1f1f1;
    --text-muted: rgba(241, 241, 241, 0.6);
    --button-background: #8e44ad;
    --button-hover-background: #9b59b6;
    --button-shadow: 0 4px 15px rgba(142, 68, 173, 0.4);
    --number-background: #333333;
    --number-color: #ffffff;
    --input-background: rgba(0, 0, 0, 0.3);
    --input-text: #eeeeee;
}

* {
    box-sizing: border-box;
}

body {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    background: var(--background-gradient);
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
    margin: 0;
    transition: background 0.4s ease;
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 900px;
    width: 95%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3rem;
    padding: 4rem 1rem;
}

/* Hero Section */
.hero {
    text-align: center;
    margin-bottom: 1rem;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(to right, #fff, var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* Content Sections */
.info-section {
    background: var(--card-background);
    padding: 2.5rem;
    border-radius: 24px;
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    width: 100%;
}

.info-section h2 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--accent-color);
}

.info-section p {
    margin-bottom: 1.2rem;
}

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

.info-item h3 {
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
}

/* Contact Card */
.contact-card {
    background: var(--card-background);
    padding: 2.5rem;
    border-radius: 24px;
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    width: 100%;
    max-width: 600px;
}

.contact-card h3 {
    text-align: center;
    font-size: 1.5rem;
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: var(--input-background);
    color: var(--input-text);
    font-size: 1rem;
}

.submit-btn {
    width: 100%;
    background: var(--button-background);
    color: white;
    border: none;
    padding: 1.2rem;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: var(--button-shadow);
    transition: all 0.3s ease;
}

.submit-btn:hover {
    background: var(--button-hover-background);
    transform: translateY(-2px);
}

/* Comments */
.comments-card {
    background: var(--card-background);
    padding: 2rem;
    border-radius: 24px;
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    width: 100%;
}

/* FAQ Styles */
.faq-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.faq-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 1rem;
}

.faq-item h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--accent-color);
}

.faq-item p {
    font-size: 0.95rem;
    color: var(--text-muted);
}

/* Warning Section */
.warning-section {
    border: 2px solid rgba(255, 107, 107, 0.3);
}

.warning-section h2 {
    color: #ff6b6b;
}

.warning-section ul {
    padding-left: 1.2rem;
    color: var(--text-muted);
}

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

/* Footer */
footer {
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    padding: 3rem 1rem;
    margin-top: 4rem;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: white;
}

.copyright {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.container > * {
    animation: fadeIn 0.8s ease forwards;
}

@media (max-width: 600px) {
    .hero h1 { font-size: 2.2rem; }
    .container { padding: 2rem 1rem; }
}