body { margin: 0; font-family: 'Segoe UI', Tahoma, sans-serif; background: #eef2f7; min-height: 100vh; }
.page-wrapper { min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 20px; }
.top-header { text-align: center; margin-bottom: 30px; }
.top-header h2 { margin: 0; font-weight: 700; color: #0a3d91; letter-spacing: 1px; }
.top-header h2:first-child { font-size: 32px; }
.top-header h2:last-child { font-size: 28px; margin-top: 8px; color: #15499e; }
.login-container { width: 100%; max-width: 1000px; height: 500px; display: flex; background: white; border-radius: 20px; overflow: hidden; box-shadow: 0 10px 30px rgba(0,0,0,0.08), 0 2px 8px rgba(0,0,0,0.04); }
.school-logo { width: 80px; margin-bottom: 15px; }
.top-header::after { content: ""; display: block; width: 120px; height: 4px; background: #1877f2; margin: 15px auto 0; border-radius: 10px; }
.left-panel { position: relative; flex: 1; background-image: url("../images/bg-login.png"); background-size: cover; background-position: center; }
.left-panel::before { content: ''; position: absolute; inset: 0; background: rgba(0,0,0,0.15); }
.left-panel h1 { font-size: 36px; font-weight: bold; }
.left-panel p { font-size: 18px; opacity: 0.9; }
.right-panel { flex: 1; display: flex; justify-content: center; align-items: center; background: #f8f9fa; }
.login-box { width: 360px; background: white; padding: 35px; border-radius: 10px; box-shadow: 0 5px 20px rgba(0,0,0,0.08); }
.login-box h4 { margin-bottom: 25px; font-weight: 600; }
.form-control { height: 45px; border-radius: 6px; }
.form-control:focus { box-shadow: none; border-color: #1877f2; }
.btn-login { height: 45px; border-radius: 6px; font-weight: 600; background: #1877f2; border: none; color: #fff; }
.btn-login:hover { background: #0d6efd; }
.footer-text { margin-top: 20px; font-size: 13px; text-align: center; color: #999; }
@media (max-width: 768px) {
    .left-panel {display: none;}
    .right-panel {flex: 1 0 100%;}
}