/* 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: #1a1a1a;
    overflow-x: hidden;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 900;
    line-height: 1.2;
}

.title-highlight {
    color: #2563eb;
    font-weight: 700;
}

.title-main {
    background: linear-gradient(135deg, #1e40af, #7c3aed, #dc2626);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-family: 'Orbitron', sans-serif;
    font-weight: 900;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.stock-chart-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"><path d="M0,400 L100,350 L200,380 L300,320 L400,290 L500,310 L600,250 L700,200 L800,240 L900,180 L1000,160 L1100,120 L1200,100" stroke="%23ffffff20" stroke-width="3" fill="none"/><path d="M0,450 L100,420 L200,440 L300,390 L400,360 L500,380 L600,330 L700,280 L800,320 L900,260 L1000,240 L1100,200 L1200,180" stroke="%2300ff8820" stroke-width="2" fill="none"/></svg>') no-repeat center;
    background-size: cover;
    opacity: 0.3;
}

.floating-numbers {
    position: absolute;
    width: 100%;
    height: 100%;
    z-index: 2;
}

.floating-numbers .number {
    position: absolute;
    font-family: 'Orbitron', monospace;
    font-weight: 700;
    font-size: 14px;
    padding: 8px 12px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
    animation: float 6s ease-in-out infinite;
}

.number.gain {
    background: rgba(34, 197, 94, 0.2);
    color: #22c55e;
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.number.loss {
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); opacity: 0.7; }
    50% { transform: translateY(-20px) rotate(2deg); opacity: 1; }
}

.hero .container {
    position: relative;
    z-index: 10;
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 60px;
    align-items: center;
}

.hero-badge {
    display: inline-block;
    margin-bottom: 20px;
}

.hero-badge span {
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    color: white;
    padding: 8px 20px;
    border-radius: 30px;
    font-weight: 700;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: 24px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: #cbd5e1;
    margin-bottom: 40px;
    font-weight: 500;
}

.hero-features {
    display: flex;
    gap: 30px;
    margin-bottom: 40px;
}

.feature {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #e2e8f0;
    font-weight: 600;
}

.feature-icon {
    font-size: 1.2rem;
}

.hero-cta {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.cta-button {
    position: relative;
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    border: none;
    padding: 20px 40px;
    border-radius: 50px;
    color: white;
    font-size: 1.1rem;
    font-weight: 900;
    cursor: pointer;
    overflow: hidden;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.3);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 20px 40px rgba(37, 99, 235, 0.4);
}

.cta-button.large {
    padding: 24px 48px;
    font-size: 1.2rem;
}

.button-effect {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s ease;
}

.cta-button:hover .button-effect {
    left: 100%;
}

.cta-info {
    display: flex;
    gap: 20px;
    color: #94a3b8;
    font-size: 14px;
    font-weight: 600;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.professor-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: 30px;
    width: 100%;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.card-header {
    text-align: center;
    margin-bottom: 24px;
}

.card-header h3 {
    color: white;
    font-size: 1.5rem;
    margin-bottom: 8px;
    font-weight: 900;
}

.badge {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: white;
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
}

.card-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    text-align: center;
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-number {
    font-family: 'Orbitron', monospace;
    font-size: 1.8rem;
    font-weight: 900;
    color: #3b82f6;
}

.stat-label {
    color: #cbd5e1;
    font-size: 0.9rem;
    font-weight: 600;
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 16px;
    background: linear-gradient(135deg, #1e40af, #7c3aed);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 900;
}

.section-header p {
    font-size: 1.1rem;
    color: #64748b;
    font-weight: 500;
}

/* Professor Introduction */
.professor-intro {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.intro-grid {
    display: flex;
    flex-direction: column;
    gap: 80px;
}

.intro-item {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 60px;
    align-items: center;
}

.intro-item.reverse {
    grid-template-columns: 1fr 300px;
}

.intro-image {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 360px;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    border-radius: 20px;
    position: relative;
    overflow: hidden;
}

.intro-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, rgba(255, 255, 255, 0.1), transparent);
}

.education-icon,
.experience-icon,
.books-icon {
    font-size: 4rem;
    z-index: 2;
}

.intro-content h3 {
    font-size: 1.8rem;
    margin-bottom: 16px;
    color: #1e293b;
    font-weight: 900;
}

.intro-content p {
    font-size: 1.1rem;
    color: #475569;
    margin-bottom: 20px;
    line-height: 1.7;
}

.highlight-box {
    background: linear-gradient(135deg, #dbeafe, #e0e7ff);
    border-left: 4px solid #3b82f6;
    padding: 16px 20px;
    border-radius: 8px;
    margin-top: 20px;
}

.highlight-box span {
    color: #1e40af;
    font-weight: 700;
}

.experience-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 20px;
}

.exp-item {
    background: white;
    padding: 12px 16px;
    border-radius: 8px;
    border-left: 3px solid #8b5cf6;
    font-weight: 600;
    color: #374151;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.media-info {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 20px;
}

.media-info span {
    background: #f1f5f9;
    padding: 8px 12px;
    border-radius: 6px;
    font-weight: 600;
    color: #334155;
}

/* Benefits Section */
.benefits {
    padding: 100px 0;
    background: white;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.benefit-card {
    background: white;
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 2px solid transparent;
    position: relative;
}

.benefit-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
    border-color: #3b82f6;
}

.benefit-card.featured {
    background: linear-gradient(135deg, #1e40af, #7c3aed);
    color: white;
    position: relative;
    overflow: hidden;
}

.featured-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: #f59e0b;
    color: white;
    padding: 6px 12px;
    border-radius: 15px;
    font-size: 11px;
    font-weight: 900;
    text-transform: uppercase;
}

.benefit-icon {
    margin-bottom: 24px;
}

.icon-wrapper {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    border-radius: 50%;
    font-size: 2rem;
    margin: 0 auto;
}

.benefit-card.featured .icon-wrapper {
    background: rgba(255, 255, 255, 0.2);
}

.benefit-card h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
    font-weight: 900;
}

.benefit-card p {
    font-size: 1rem;
    margin-bottom: 20px;
    line-height: 1.6;
    color: #64748b;
}

.benefit-card.featured p {
    color: rgba(255, 255, 255, 0.9);
}

.benefit-card ul {
    text-align: left;
    list-style: none;
}

.benefit-card li {
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
    color: #475569;
    font-weight: 500;
}

.benefit-card.featured li {
    color: rgba(255, 255, 255, 0.9);
}

.benefit-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #22c55e;
    font-weight: 900;
}

/* Testimonials */
.testimonials {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.testimonial-card {
    background: white;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.testimonial-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 900;
    font-size: 1.1rem;
}

.user-details {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.user-name {
    font-weight: 700;
    color: #1e293b;
}

.user-role {
    font-size: 0.9rem;
    color: #64748b;
    font-weight: 500;
}

.rating {
    font-size: 1.1rem;
}

blockquote {
    font-style: italic;
    color: #374151;
    line-height: 1.7;
    margin-bottom: 20px;
    font-size: 1rem;
}

.profit-badge {
    display: inline-block;
    background: linear-gradient(135deg, #22c55e, #16a34a);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 700;
}

.profit-badge.success {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
}

/* Expertise Section */
.expertise {
    padding: 100px 0;
    background: white;
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.expertise-item {
    background: linear-gradient(135deg, #f8fafc, #e2e8f0);
    border-radius: 16px;
    padding: 30px 25px;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.expertise-item:hover {
    transform: translateY(-5px);
    border-color: #3b82f6;
    background: white;
    box-shadow: 0 15px 35px rgba(59, 130, 246, 0.1);
}

.expertise-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.expertise-item h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: #1e293b;
    font-weight: 900;
}

.expertise-item p {
    color: #64748b;
    font-weight: 500;
    line-height: 1.6;
}

/* Community Rules */
.community-rules {
    padding: 100px 0;
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    color: white;
}

.rules-content {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 60px;
    align-items: center;
}

.rules-image {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 400px;
}

.community-visual {
    position: relative;
    width: 200px;
    height: 200px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(20px);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.visual-element {
    position: absolute;
    font-size: 2rem;
    background: rgba(255, 255, 255, 0.2);
    padding: 15px;
    border-radius: 50%;
    backdrop-filter: blur(10px);
}

.visual-element:nth-child(1) {
    top: -20px;
    left: 50px;
    animation: float 3s ease-in-out infinite;
}

.visual-element:nth-child(2) {
    bottom: -20px;
    right: 50px;
    animation: float 3s ease-in-out infinite 1s;
}

.visual-element:nth-child(3) {
    top: 50%;
    right: -30px;
    animation: float 3s ease-in-out infinite 2s;
}

.rules-list {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.rule-item {
    display: flex;
    gap: 24px;
    align-items: flex-start;
}

.rule-number {
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.rule-content h3 {
    font-size: 1.4rem;
    margin-bottom: 8px;
    font-weight: 900;
}

.rule-content p {
    color: #cbd5e1;
    line-height: 1.6;
    font-weight: 500;
}

/* Final CTA */
.final-cta {
    padding: 100px 0;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
    color: white;
    text-align: center;
}

.cta-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 40px;
}

.cta-text h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 20px;
    font-weight: 900;
}

.cta-text p {
    font-size: 1.2rem;
    color: #cbd5e1;
    margin-bottom: 20px;
    font-weight: 500;
}

.urgency-info {
    background: rgba(239, 68, 68, 0.2);
    border: 1px solid rgba(239, 68, 68, 0.3);
    padding: 12px 24px;
    border-radius: 25px;
    display: inline-block;
}

.urgency-text {
    color: #fca5a5;
    font-weight: 700;
    font-size: 1rem;
}

.security-info {
    display: flex;
    gap: 30px;
    justify-content: center;
    margin-top: 20px;
}

.security-item span {
    color: #94a3b8;
    font-weight: 600;
    font-size: 0.9rem;
}

/* Footer */
.footer {
    background: #0f172a;
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-info h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
    font-weight: 900;
}

.footer-info p {
    color: #94a3b8;
    font-weight: 500;
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.link-group h4 {
    color: #3b82f6;
    margin-bottom: 16px;
    font-weight: 900;
}

.link-group p {
    color: #cbd5e1;
    margin-bottom: 8px;
    font-weight: 500;
}

.footer-bottom {
    border-top: 1px solid #334155;
    padding-top: 20px;
    text-align: center;
    color: #64748b;
    font-weight: 500;
}

/* Floating Button */
.floating-button {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
    padding: 15px 25px;
    border-radius: 30px;
    font-weight: 700;
    font-size: 14px;
    box-shadow: 0 8px 25px rgba(239, 68, 68, 0.4);
    z-index: 1000;
    transition: all 0.3s ease;
    cursor: pointer;
    text-align: center;
    max-width: 90%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
    animation: pulse 2s infinite;
}

.floating-button:hover {
    transform: translateX(-50%) translateY(-3px);
    box-shadow: 0 12px 35px rgba(239, 68, 68, 0.5);
    background: linear-gradient(135deg, #dc2626, #b91c1c);
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 8px 25px rgba(239, 68, 68, 0.4);
    }
    50% {
        box-shadow: 0 8px 25px rgba(239, 68, 68, 0.6), 0 0 0 0 rgba(239, 68, 68, 0.3);
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .intro-item,
    .intro-item.reverse {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }
    
    .rules-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .hero-features {
        flex-direction: column;
        gap: 15px;
    }
    
    .benefits-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .expertise-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
    
    .security-info {
        flex-direction: column;
        gap: 15px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .floating-button {
        font-size: 13px;
        padding: 12px 20px;
        max-width: 95%;
        bottom: 15px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero,
    .professor-intro,
    .benefits,
    .testimonials,
    .expertise,
    .community-rules,
    .final-cta {
        padding: 60px 0;
    }
    
    .cta-button {
        width: 100%;
        padding: 18px 20px;
        font-size: 1rem;
    }
    
    .floating-button {
        font-size: 12px;
        padding: 10px 15px;
        max-width: 95%;
        bottom: 10px;
        border-radius: 25px;
    }
}