body {
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial, "Apple Color Emoji", "Segoe UI Emoji";
    background: linear-gradient(135deg, #0f0f11 0%, #1a1a1d 100%);
    color: #e6edf3;
    margin: 0;
    height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    background: #18181b;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.6);
    padding: 60px;
    max-width: 500px;
    width: 100%;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 16px;
    padding: 2px;
    background: linear-gradient(45deg, #1e40af, #3b82f6, #60a5fa, #93c5fd, #1e40af);
    background-size: 300% 300%;
    animation: borderGlow 3s linear infinite;
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask-composite: exclude;
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
}

@keyframes borderGlow {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

h1 {
    color: #e6edf3;
    margin: 0 0 40px;
    font-size: 42px;
    font-weight: 600;
    position: relative;
    z-index: 1;
}

.subtitle {
    color: #8b949e;
    margin-bottom: 40px;
    font-size: 18px;
    line-height: 1.5;
    position: relative;
    z-index: 1;
}

.login-button {
    background: #5865F2;
    color: white;
    padding: 18px 40px;
    border-radius: 12px;
    text-decoration: none;
    font-size: 20px;
    font-weight: 500;
    display: inline-block;
    transition: all 0.2s ease;
    border: none;
    cursor: pointer;
    position: relative;
    z-index: 1;
}

.login-button:hover {
    background: #4752C4;
    transform: translateY(-2px);
}