body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: #f8fafc;
    display: flex;
    height: 100vh;
    overflow: hidden;
}

.login-container {
    display: flex;
    width: 100%;
    height: 100%;
}

.intro-section {
    flex: 1.2;
    background: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    color: white;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 60px;
    position: relative;
}

.intro-content {
    max-width: 600px;
    z-index: 1;
}

.intro-section h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    font-weight: 800;
}

.intro-section p {
    font-size: 1.25rem;
    line-height: 1.6;
    opacity: 0.9;
}

.login-section {
    flex: 0.8;
    background: white;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 40px;
    box-shadow: -10px 0 30px rgba(0,0,0,0.05);
}

.login-card {
    width: 100%;
    max-width: 360px;
}

.login-card h2 {
    font-size: 1.8rem;
    color: #1e293b;
    margin-bottom: 8px;
    text-align: center;
}

.login-card p {
    color: #64748b;
    margin-bottom: 32px;
    text-align: center;
}

.login-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.btn-login {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.2s;
    border: 1px solid #e2e8f0;
}

.btn-login:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.btn-github { background: #24292e; color: white; border: none; }
.btn-google { background: white; color: #1f1f1f; }
.btn-microsoft { background: #2f2f2f; color: white; border: none; }
.btn-wechat { background: #07c160; color: white; border: none; }
.btn-alipay { background: #1677ff; color: white; border: none; }

.icon {
    width: 20px;
    height: 20px;
    margin-right: 12px;
}

/* Background elements */
.blob {
    position: absolute;
    width: 500px;
    height: 500px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    top: -100px;
    left: -100px;
    filter: blur(80px);
}