:root {
    --color-primary: #FF6B35;
    --color-primary-dark: #E55A28;
    --color-primary-light: #FF8C66;
    --color-secondary: #4ECDC4;
    --color-secondary-light: #95E1D3;
    --color-accent: #FFB84D;
    --color-bg-light: #FAFAFA;
    --color-bg-white: #FFFFFF;
    --color-text-dark: #1A1A1A;
    --color-text-gray: #666666;
    --color-text-light: #999999;
    --color-border: #E8E8E8;
    --color-success: #10B981;
    --color-warning: #F59E0B;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --font-main: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Apple SD Gothic Neo', 'Pretendard', sans-serif;
}

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

body {
    font-family: var(--font-main);
    background: var(--color-bg-light);
    color: var(--color-text-dark);
    line-height: 1.7;
    min-height: 100vh;
}

/* 헤더 */
header {
    background: var(--color-bg-white);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

.header-content {
    max-width: 1280px;
    margin: 0 auto;
    padding: 1rem 2.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--color-text-dark);
    display: flex;
    align-items: center;
    gap: 0.6rem;
    letter-spacing: -0.02em;
}

.logo-emoji {
    font-size: 2rem;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-main {
    font-size: 1.3rem;
}

.logo-sub {
    font-size: 0.7rem;
    color: var(--color-text-gray);
    font-weight: 500;
}

nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

nav a {
    color: var(--color-text-dark);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s;
    font-size: 0.95rem;
    position: relative;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width 0.3s;
}

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

nav a:hover::after {
    width: 100%;
}

.btn-host {
    background: var(--color-primary);
    color: var(--color-bg-white);
    padding: 0.75rem 1.8rem;
    border-radius: var(--radius-md);
    border: none;
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-host:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* 히어로 섹션 */
.hero {
    max-width: 1280px;
    margin: 0 auto;
    padding: 6rem 2.5rem;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--color-secondary-light);
    color: var(--color-text-dark);
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 2rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--color-text-dark);
    margin-bottom: 1.5rem;
    line-height: 1.25;
    letter-spacing: -0.03em;
}

.hero-highlight {
    color: var(--color-primary);
    position: relative;
}

.hero-subtitle {
    font-size: 1.4rem;
    color: var(--color-text-gray);
    margin-bottom: 1.5rem;
    font-weight: 500;
    line-height: 1.6;
}

.hero-desc {
    font-size: 1.05rem;
    color: var(--color-text-light);
    margin-bottom: 3rem;
    line-height: 1.8;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-bg-white);
    padding: 1.1rem 2.8rem;
    border-radius: var(--radius-md);
    border: none;
    font-weight: 700;
    font-size: 1.05rem;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--color-bg-white);
    color: var(--color-text-dark);
    padding: 1.1rem 2.8rem;
    border-radius: var(--radius-md);
    border: 2px solid var(--color-border);
    font-weight: 700;
    font-size: 1.05rem;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-secondary:hover {
    border-color: var(--color-text-dark);
    background: var(--color-text-dark);
    color: var(--color-bg-white);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-top: 3rem;
    padding-top: 3rem;
    border-top: 1px solid var(--color-border);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 900;
    color: var(--color-primary);
    display: block;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--color-text-gray);
    font-weight: 500;
}

/* 섹션 공통 스타일 */
section {
    max-width: 1280px;
    margin: 5rem auto;
    padding: 0 2.5rem;
}

.section-header {
    text-align: center;
    margin-bottom: 3.5rem;
}

.section-badge {
    display: inline-block;
    background: var(--color-bg-white);
    color: var(--color-primary);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-lg);
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 1rem;
    border: 1px solid var(--color-border);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--color-text-dark);
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--color-text-gray);
    line-height: 1.7;
}

/* 플랫폼 특징 */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--color-bg-white);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all 0.3s;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.feature-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    display: block;
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--color-text-dark);
}

.feature-desc {
    color: var(--color-text-gray);
    line-height: 1.7;
    font-size: 0.95rem;
}

/* 클래스 카드 */
.class-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.tab-btn {
    background: var(--color-bg-white);
    color: var(--color-text-gray);
    padding: 0.8rem 2rem;
    border-radius: var(--radius-md);
    border: 2px solid var(--color-border);
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s;
}

.tab-btn.active {
    background: var(--color-primary);
    color: var(--color-bg-white);
    border-color: var(--color-primary);
}

.tab-btn:hover {
    border-color: var(--color-primary);
}

.class-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.5rem;
}

.class-card {
    background: var(--color-bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: all 0.3s;
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.class-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.class-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    position: relative;
}

.class-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: rgba(255, 255, 255, 0.95);
    color: var(--color-text-dark);
    padding: 0.4rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 700;
}

.class-header {
    padding: 1.5rem;
}

.class-type {
    display: inline-block;
    background: var(--color-secondary-light);
    color: var(--color-text-dark);
    padding: 0.35rem 0.9rem;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 0.8rem;
}

.class-title {
    font-size: 1.35rem;
    font-weight: 800;
    margin-bottom: 0.6rem;
    color: var(--color-text-dark);
    line-height: 1.4;
}

.class-subtitle {
    font-size: 0.9rem;
    color: var(--color-text-gray);
    line-height: 1.5;
}

.class-body {
    padding: 0 1.5rem 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.class-host {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 1rem;
    padding: 0.8rem;
    background: var(--color-bg-light);
    border-radius: var(--radius-sm);
}

.host-avatar {
    width: 32px;
    height: 32px;
    background: var(--color-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.host-info {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.host-label {
    font-size: 0.7rem;
    color: var(--color-text-light);
    font-weight: 600;
}

.host-name {
    font-size: 0.9rem;
    color: var(--color-text-dark);
    font-weight: 700;
}

.class-desc {
    color: var(--color-text-gray);
    line-height: 1.7;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    flex: 1;
}

.class-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1.2rem;
    border-top: 1px solid var(--color-border);
}

.class-price-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.class-price-label {
    font-size: 0.75rem;
    color: var(--color-text-light);
    font-weight: 600;
}

.class-price {
    font-size: 1.3rem;
    font-weight: 900;
    color: var(--color-primary);
}

.class-status {
    padding: 0.5rem 1.2rem;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 700;
}

.status-funding {
    background: var(--color-success);
    color: var(--color-bg-white);
}

.status-recruiting {
    background: var(--color-primary);
    color: var(--color-bg-white);
}

.status-preparing {
    background: var(--color-bg-light);
    color: var(--color-text-gray);
    border: 1px solid var(--color-border);
}

.status-planning {
    background: var(--color-warning);
    color: var(--color-bg-white);
}

.class-progress {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

.progress-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.progress-text {
    font-size: 0.85rem;
    color: var(--color-text-gray);
}

.progress-count {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-primary);
}

.progress-bar {
    height: 6px;
    background: var(--color-bg-light);
    border-radius: 10px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--color-primary);
    border-radius: 10px;
    transition: width 0.3s;
}

/* 호스트 신청 섹션 */
.host-cta {
    background: var(--color-text-dark);
    padding: 5rem 3rem;
    border-radius: var(--radius-lg);
    text-align: center;
    color: var(--color-bg-white);
    position: relative;
    overflow: hidden;
}

.host-cta::before {
    content: '🎓';
    position: absolute;
    font-size: 15rem;
    opacity: 0.05;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.host-cta-content {
    position: relative;
    z-index: 1;
}

.host-cta h2 {
    font-size: 2.8rem;
    font-weight: 900;
    margin-bottom: 1.2rem;
    letter-spacing: -0.02em;
}

.host-cta-highlight {
    color: var(--color-accent);
}

.host-cta p {
    font-size: 1.2rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
    line-height: 1.7;
}

.host-benefits {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin: 2.5rem 0;
    flex-wrap: wrap;
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.benefit-icon {
    font-size: 1.8rem;
}

.benefit-text {
    text-align: left;
}

.benefit-label {
    font-size: 0.85rem;
    opacity: 0.7;
    display: block;
}

.benefit-value {
    font-size: 1.1rem;
    font-weight: 800;
    display: block;
}

/* 푸터 */
footer {
    background: var(--color-text-dark);
    color: var(--color-white);
    padding: 3rem 2rem 2rem;
    margin-top: 5rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--color-accent-light);
}

.footer-section p, .footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    display: block;
    margin-bottom: 0.5rem;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: var(--color-accent-light);
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

/* 반응형 */
@media (max-width: 768px) {
    .header-content {
        padding: 1rem 1.5rem;
    }

    .logo {
        font-size: 1.3rem;
    }

    .logo-main {
        font-size: 1.1rem;
    }

    nav {
        display: none;
    }

    .hero {
        padding: 4rem 1.5rem;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: 2rem;
    }

    section {
        padding: 0 1.5rem;
        margin: 3rem auto;
    }

    .section-title {
        font-size: 2rem;
    }

    .class-tabs {
        flex-direction: column;
        gap: 0.8rem;
    }

    .class-grid {
        grid-template-columns: 1fr;
    }

    .features {
        grid-template-columns: 1fr;
    }

    .host-cta {
        padding: 3rem 2rem;
    }

    .host-cta h2 {
        font-size: 2rem;
    }

    .host-benefits {
        flex-direction: column;
        gap: 1.5rem;
    }

    .btn-primary, .btn-secondary {
        width: 100%;
    }
}/* Add styles here */