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

:root {
    --primary-color: #5865F2;
    --primary-hover: #4752C4;
    --secondary-color: #EB459E;
    --bg-dark: #1a1a2e;
    --bg-darker: #16213e;
    --text-light: #ffffff;
    --text-gray: #b8b8b8;
    --card-bg: #0f0f1a;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-darker) 100%);
    color: var(--text-light);
    min-height: 100vh;
    line-height: 1.6;
}

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

header {
    text-align: center;
    padding: 60px 20px 40px;
}

.logo {
    margin-bottom: 20px;
}

.logo-placeholder {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    box-shadow: 0 8px 32px rgba(88, 101, 242, 0.3);
    margin: 0 auto;
}

header h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    font-size: 1.3rem;
    color: var(--text-gray);
    margin-bottom: 30px;
}

main {
    padding: 40px 0;
}

.hero {
    text-align: center;
    padding: 60px 20px;
    background: rgba(88, 101, 242, 0.1);
    border-radius: 20px;
    margin-bottom: 60px;
    backdrop-filter: blur(10px);
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-gray);
    max-width: 600px;
    margin: 0 auto 30px;
}

.invite-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--primary-color);
    color: white;
    padding: 16px 32px;
    border-radius: 50px;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(88, 101, 242, 0.4);
}

.invite-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(88, 101, 242, 0.6);
}

.invite-btn.secondary {
    background: var(--secondary-color);
    box-shadow: 0 4px 20px rgba(235, 69, 158, 0.4);
}

.invite-btn.secondary:hover {
    background: #c73d8a;
    box-shadow: 0 6px 30px rgba(235, 69, 158, 0.6);
}

.features {
    margin-bottom: 60px;
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 40px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid rgba(88, 101, 242, 0.1);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(88, 101, 242, 0.2);
    border-color: rgba(88, 101, 242, 0.3);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.feature-card p {
    color: var(--text-gray);
    font-size: 1rem;
}

.cta {
    text-align: center;
    padding: 60px 20px;
    background: rgba(235, 69, 158, 0.1);
    border-radius: 20px;
    backdrop-filter: blur(10px);
}

.cta h2 {
    font-size: 2.5rem;
    margin-bottom: 30px;
}

footer {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-gray);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

footer p {
    margin: 5px 0;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2.5rem;
    }

    .hero h2,
    .features h2,
    .cta h2 {
        font-size: 2rem;
    }

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

    .invite-btn {
        padding: 14px 28px;
        font-size: 1rem;
    }
}