:root {
    --bg-dark: #05070a;
    --card-bg: rgba(255, 255, 255, 0.03);
    --border-color: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --accent-blue: #3b82f6;
    --accent-purple: #8b5cf6;
    --accent-emerald: #10b981;
    --glow-blue: rgba(59, 130, 246, 0.3);
    --glow-purple: rgba(139, 92, 246, 0.3);
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: 'Pretendard', sans-serif;
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
}

/* Background Animation */
.background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
}

.orb-1 {
    width: 40vw;
    height: 40vw;
    background: var(--glow-blue);
    top: -10vw;
    right: -10vw;
    animation: float 20s infinite alternate;
}

.orb-2 {
    width: 35vw;
    height: 35vw;
    background: var(--glow-purple);
    bottom: -5vw;
    left: -10vw;
    animation: float 25s infinite alternate-reverse;
}

@keyframes float {
    from {
        transform: translate(0, 0);
    }

    to {
        transform: translate(10%, 10%);
    }
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

header {
    text-align: center;
    margin-bottom: 5rem;
}

.logo {
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: 0.3rem;
    color: var(--accent-blue);
    margin-bottom: 2rem;
    opacity: 0.8;
}

h1 {
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 800;
    background: linear-gradient(to bottom, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1.5rem;
}

header p {
    color: var(--text-secondary);
    font-size: 1.2rem;
    font-weight: 300;
}

/* Project Grid */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 2.5rem;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.project-card:hover {
    transform: translateY(-10px);
    border-color: rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.06);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--accent-blue), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.project-card:hover::before {
    transform: translateX(100%);
}

.stock::before {
    background: linear-gradient(90deg, #3b82f6, #60a5fa);
}

.lotto::before {
    background: linear-gradient(90deg, #fbbf24, #f59e0b);
}

.travel::before {
    background: linear-gradient(90deg, #10b981, #34d399);
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-blue);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    letter-spacing: 0.05rem;
}

.badge.preparing {
    background: rgba(148, 163, 184, 0.1);
    color: var(--text-secondary);
}

.icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.project-card p {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 2rem;
}

.features {
    list-style: none;
    margin-bottom: 3rem;
}

.features li {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.features li::before {
    content: '•';
    color: var(--accent-blue);
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    font-weight: 600;
    font-size: 0.95rem;
}

.stock .card-footer {
    color: #60a5fa;
}

.lotto .card-footer {
    color: #fbbf24;
}

.travel .card-footer {
    color: var(--text-secondary);
    opacity: 0.7;
}

.arrow {
    transition: transform 0.3s ease;
}

.project-card:hover .arrow {
    transform: translateX(5px);
}

footer {
    margin-top: 8rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    opacity: 0.6;
}

/* Mobile Adjustments */
@media (max-width: 768px) {
    .container {
        padding: 2rem 1.5rem;
    }

    header {
        margin-bottom: 3rem;
    }

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