:root {
    --primary-blue: #4A90E2;
    --soft-purple: #6C5CE7;
    --deep-purple: #4834D4;
    --bg-color: #F8F9FF;
    --text-dark: #2D3436;
    --text-light: #636E72;
    --white: #FFFFFF;
    --accent-pink: #FD79A8;
    --accent-yellow: #FDCB6E;
    --success-green: #00B894;
    --card-shadow: 0 10px 30px rgba(108, 92, 231, 0.15);
    --hover-shadow: 0 15px 40px rgba(108, 92, 231, 0.25);
}

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

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 18px;
    background-color: var(--bg-color);
    color: var(--text-dark);
    line-height: 1.8;
    overflow-x: hidden;
}

/* Character Animation */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

@keyframes blink {
    0%, 90%, 100% { transform: scaleY(1); }
    95% { transform: scaleY(0.1); }
}

@keyframes wave {
    0%, 100% { transform: rotate(-5deg); }
    50% { transform: rotate(5deg); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

/* Header */
header {
    background: linear-gradient(135deg, var(--deep-purple) 0%, var(--soft-purple) 50%, var(--primary-blue) 100%);
    padding: 60px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23FFFFFF' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.header-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.character {
    width: 120px;
    height: 120px;
    background: var(--white);
    border-radius: 50%;
    margin: 0 auto 20px;
    position: relative;
    animation: float 3s ease-in-out infinite;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
}

.character-face {
    font-size: 50px;
    animation: blink 4s infinite;
}

.character-name {
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-yellow);
    color: var(--text-dark);
    padding: 5px 15px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 14px;
    white-space: nowrap;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

h1 {
    color: var(--white);
    font-size: clamp(2rem, 5vw, 3rem);
    margin-bottom: 15px;
    text-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.subtitle {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
}

/* Navigation */
nav {
    background: var(--white);
    padding: 15px 20px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.nav-btn {
    background: var(--bg-color);
    border: 2px solid transparent;
    padding: 12px 24px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-dark);
    transition: all 0.3s ease;
}

.nav-btn:hover {
    background: var(--soft-purple);
    color: var(--white);
    transform: translateY(-2px);
}

.nav-btn.active {
    background: linear-gradient(135deg, var(--soft-purple), var(--primary-blue));
    color: var(--white);
}

/* Main Content */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

.section {
    display: none;
    animation: slideUp 0.5s ease;
}

.section.active {
    display: block;
}

/* Cards */
.card {
    background: var(--white);
    border-radius: 20px;
    padding: 30px;
    margin-bottom: 25px;
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--hover-shadow);
    border-color: var(--soft-purple);
}

.card-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--soft-purple), var(--primary-blue));
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 20px;
}

.card h2 {
    color: var(--deep-purple);
    font-size: 1.6rem;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card p {
    color: var(--text-light);
    font-size: 1.05rem;
    margin-bottom: 15px;
}

.card li {
    font-size: 1.05rem;
}

/* Tips Box */
.tip-box {
    background: linear-gradient(135deg, #FFF9E6 0%, #FFF3CD 100%);
    border-left: 4px solid var(--accent-yellow);
    padding: 20px;
    border-radius: 0 15px 15px 0;
    margin: 20px 0;
}

.tip-box h3 {
    color: #856404;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.tip-box ul {
    margin-left: 25px;
    color: #856404;
}

.tip-box li {
    font-size: 1.05rem;
    margin-bottom: 8px;
}

/* Warning Box */
.warning-box {
    background: linear-gradient(135deg, #FFE8E8 0%, #FFCDD2 100%);
    border-left: 4px solid #E57373;
    padding: 20px;
    border-radius: 0 15px 15px 0;
    margin: 20px 0;
}

.warning-box h3 {
    color: #C62828;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.warning-box ul {
    margin-left: 25px;
    color: #C62828;
}

.warning-box li {
    font-size: 1.05rem;
    margin-bottom: 8px;
}

/* Success Box */
.success-box {
    background: linear-gradient(135deg, #E8F5E9 0%, #C8E6C9 100%);
    border-left: 4px solid var(--success-green);
    padding: 20px;
    border-radius: 0 15px 15px 0;
    margin: 20px 0;
}

.success-box h3 {
    color: #2E7D32;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.success-box ul {
    margin-left: 25px;
    color: #2E7D32;
}

.success-box li {
    font-size: 1.05rem;
    margin-bottom: 8px;
}

/* Grid Layout */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

/* Steps */
.steps {
    counter-reset: step;
}

.step {
    position: relative;
    padding-left: 60px;
    margin-bottom: 25px;
}

.step::before {
    counter-increment: step;
    content: counter(step);
    position: absolute;
    left: 0;
    top: 0;
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, var(--soft-purple), var(--primary-blue));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
}

.step h3 {
    color: var(--deep-purple);
    margin-bottom: 8px;
}

.step p {
    color: var(--text-light);
    font-size: 1.05rem;
}

/* Terminal Info */
.terminal-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.terminal-card {
    background: linear-gradient(135deg, var(--primary-blue), var(--soft-purple));
    color: var(--white);
    padding: 20px;
    border-radius: 15px;
    text-align: center;
    transition: transform 0.3s ease;
}

.terminal-card:hover {
    transform: scale(1.03);
}

.terminal-card h4 {
    font-size: 1.3rem;
    margin-bottom: 8px;
}

.terminal-card p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1rem;
}

/* Table */
.info-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    border-radius: 15px;
    overflow: hidden;
}

.info-table th {
    background: linear-gradient(135deg, var(--soft-purple), var(--primary-blue));
    color: var(--white);
    padding: 15px;
    font-size: 1.1rem;
    text-align: left;
}

.info-table td {
    padding: 15px;
    font-size: 1.05rem;
    border-bottom: 1px solid #EEE;
}

.info-table tr:hover {
    background: var(--bg-color);
}

/* FAQ */
.faq-item {
    border-bottom: 2px solid #EEE;
    padding: 20px 0;
}

.faq-question {
    display: flex;
    align-items: center;
    gap: 15px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--deep-purple);
    transition: color 0.3s ease;
}

.faq-question:hover {
    color: var(--soft-purple);
}

.faq-question::before {
    content: '✈️';
}

.faq-answer {
    margin-left: 33px;
    padding: 15px 0;
    color: var(--text-light);
    font-size: 1.05rem;
    display: none;
}

.faq-item.open .faq-answer {
    display: block;
}

/* Character Message */
.character-message {
    background: linear-gradient(135deg, #F0E8FF 0%, #E8DEFF 100%);
    border-radius: 20px;
    padding: 25px;
    margin: 30px 0;
    position: relative;
    border: 2px solid var(--soft-purple);
}

.character-message::before {
    content: '💬';
    position: absolute;
    top: -15px;
    left: 20px;
    background: var(--white);
    padding: 5px 10px;
    border-radius: 50%;
    font-size: 20px;
}

.character-message p {
    color: var(--deep-purple);
    font-style: italic;
    font-size: 1.1rem;
    padding-left: 20px;
}

/* CTA Button */
.cta-btn {
    background: linear-gradient(135deg, var(--soft-purple), var(--primary-blue));
    color: var(--white);
    border: none;
    padding: 15px 35px;
    border-radius: 30px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.cta-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(108, 92, 231, 0.4);
}

/* Footer */
footer {
    background: linear-gradient(135deg, var(--deep-purple) 0%, var(--soft-purple) 100%);
    color: var(--white);
    text-align: center;
    padding: 40px 20px;
    margin-top: 50px;
}

footer p {
    opacity: 0.9;
}

/* Container with Sidebar */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* Fixed Ads */
.fixed-ad {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1000;
}

.left-ad {
    left: 20px;
}

.right-ad {
    right: 20px;
}

.fixed-ad ins {
    display: block;
    background: var(--white);
    padding: 10px;
    border-radius: 10px;
    box-shadow: var(--card-shadow);
}

/* Main Content */
.main-container main {
    flex: 1;
    max-width: 100%;
    padding: 0;
    margin: 0;
}

/* Responsive */
@media (max-width: 768px) {
    header {
        padding: 40px 15px;
    }

    body {
        font-size: 16px;
    }

    .main-container {
        padding: 20px 15px;
    }

    /* Hide fixed ads on mobile */
    .fixed-ad {
        display: none;
    }

    .character {
        width: 100px;
        height: 100px;
    }

    .character-face {
        font-size: 40px;
    }

    .card {
        padding: 22px;
    }

    .card h2 {
        font-size: 1.4rem;
    }

    .card p, .card li {
        font-size: 1rem;
    }

    .nav-container {
        gap: 6px;
    }

    .nav-btn {
        padding: 10px 18px;
        font-size: 0.9rem;
    }
}

/* Emoji decoration */
.emoji-badge {
    display: inline-block;
    background: var(--bg-color);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.95rem;
    margin: 4px;
}

/* Timeline */
.timeline {
    position: relative;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, var(--soft-purple), var(--primary-blue));
    border-radius: 3px;
}

.timeline-item {
    position: relative;
    padding-bottom: 25px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -26px;
    top: 5px;
    width: 14px;
    height: 14px;
    background: var(--white);
    border: 3px solid var(--soft-purple);
    border-radius: 50%;
}

.timeline-item h4 {
    color: var(--deep-purple);
    margin-bottom: 5px;
}

.timeline-item p {
    color: var(--text-light);
    font-size: 1.05rem;
}