.split-container {
    display: flex;
    width: 100%;
    height: 100vh;
    overflow: hidden;
}
.left-side {
    flex: 1;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    animation: slideLeft 0.8s ease forwards;
}
.left-side img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}
.left-side:hover img {
    transform: scale(1.05);
}
.left-side .overlay {
    position: absolute;
    top:0; left:0;
    width:100%;
    height:100%;
    background: linear-gradient(120deg, rgba(79,70,229,0.2), rgba(255,255,255,0.1));
    animation: gradientMove 15s ease infinite;
}
@keyframes gradientMove {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}
.right-side {
    flex: 1;
    background: #f5f7fa;
    display: flex;
    justify-content: center;
    align-items: center;
    animation: slideRight 0.8s ease forwards;
}
@keyframes slideLeft {
    0% { transform: translateX(-50%); opacity: 0; }
    100% { transform: translateX(0); opacity: 1; }
}
@keyframes slideRight {
    0% { transform: translateX(50%); opacity: 0; }
    100% { transform: translateX(0); opacity: 1; }
}
.login-card {
    background: #fff;
    border-radius: 16px;
    padding: 40px 30px;
    box-shadow: 0 12px 28px rgba(0,0,0,0.12);
    width: 100%;
    max-width: 380px;
    text-align: center;
    position: relative;
    transition: transform 0.3s, box-shadow 0.3s;
    opacity: 0;
    animation: fadeInCard 1s forwards;
}
.login-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 32px rgba(0,0,0,0.15);
}
@keyframes fadeInCard {
    0% { opacity:0; transform: translateY(20px); }
    100% { opacity:1; transform: translateY(0); }
}
.logo img { width: 60px; margin-bottom: 20px; }
.login-title { font-weight: 600; font-size: 1.8rem; color:#333; margin-bottom:15px; }
.note { font-size:0.85rem; color:#6b7280; margin-top:12px; }
.server-info { font-size:0.85rem; margin-bottom:18px; color:#4b5563; text-align:left; }
.server-info span.online { color:#4ade80; font-weight:600; }
.server-info span.offline { color:#f87171; font-weight:600; }
.form-floating { position: relative; margin-bottom: 18px; }
.form-control {
    width: 100%;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    background: #fff !important;
    padding: 16px 12px 12px 12px; 
    font-size: 0.95rem;
    color: #111827;
    caret-color: #4f46e5;
    transition: border-color 0.3s, box-shadow 0.3s, background 0.3s;
}
.form-control:focus {
    outline: none;
    border-color: #4f46e5;
    box-shadow: 0 2px 6px rgba(79,70,229,0.2);
    background: #fff !important;
    color: #111827;
}
label {
    position: absolute;
    left: 12px;
    top: 12px;
    font-size: 0.85rem;
    color: #6b7280;
    pointer-events: none;
    transition: all 0.25s ease-in-out;
}
.form-control:focus + label,
.form-control:not(:placeholder-shown) + label {
    top: -8px;
    font-size: 0.75rem;
    color: #4f46e5;
}
.captcha-container { position: relative; }
.captcha-text {
    position:absolute; top:50%; right:10px;
    transform:translateY(-50%);
    background:#f3f4f6; padding:4px 10px;
    border-radius:6px; font-weight:600;
    font-size:0.85rem; cursor:pointer;
    transition:0.2s;
}
.captcha-text:hover { background:#e5e7eb; }
.btn-login {
    width:100%; padding:14px;
    border:none; border-radius:10px;
    background:#4f46e5; color:#fff;
    font-weight:600; font-size:1rem;
    cursor:pointer; transition: all 0.3s ease;
}
.btn-login:hover { background:#4338ca; transform: scale(1.03); }
.social-login { margin-top:20px; display:flex; justify-content:center; gap:12px; opacity:0; animation:fadeIn 1s ease 0.5s forwards; }
.social-login .social-icon { font-size:1.2rem; color:#6b7280; cursor:pointer; transition:0.3s; }
.social-login .social-icon:hover { color:#4f46e5; }
@keyframes fadeIn { 0% { opacity:0; } 100% { opacity:1; } }
.alert { color:#b91c1c; font-size:0.85rem; margin-bottom:12px; }
@media(max-width:992px){ .split-container { flex-direction: column; } .left-side { height:200px; } .right-side { height:auto; } }