*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
    --bg: #0f172a; --bg2: #1e293b; --bg3: #334155;
    --text: #f1f5f9; --text2: #94a3b8;
    --primary: #3b82f6; --primary-hover: #2563eb;
    --success: #22c55e; --danger: #ef4444;
}
html, body { height: 100%; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg); color: var(--text);
}
.login-container {
    display: flex; height: 100vh; width: 100%;
}
.login-left {
    flex: 0 0 750px; display: flex; flex-direction: column; align-items: center;
    justify-content: center; padding: 2rem; background: var(--bg);
}
.login-side-logo {
    height: 160px; width: auto; border-radius: 16px; margin-bottom: 2rem;
}
.login-card {
    background: var(--bg2); border: 1px solid var(--bg3);
    border-radius: 1rem; padding: 3rem 3.5rem; width: 100%; max-width: 520px;
}
.login-card .logo-area {
    text-align: center; margin-bottom: 2rem;
}
.login-card .logo-area h1 {
    margin-top: 0.75rem; font-size: 1.5rem;
}
.login-card .logo-area p {
    color: var(--text2); font-size: 0.875rem; margin-top: 0.25rem;
}
.login-card .errorlist {
    color: var(--danger); font-size: 0.875rem; margin-bottom: 1rem;
    text-align: center;
}
.form-group { margin-bottom: 1.25rem; }
.form-group label {
    display: block; font-size: 0.875rem; color: var(--text2);
    margin-bottom: 0.375rem;
}
.form-group input {
    background: var(--bg3); border: 1px solid transparent;
    border-radius: 0.5rem; padding: 0.75rem;
    color: var(--text); width: 100%; font-size: 1rem;
    transition: border-color 0.2s;
}
.form-group input:focus {
    outline: none; border-color: var(--primary);
}
.btn {
    display: flex; align-items: center; justify-content: center;
    width: 100%; padding: 0.75rem; border-radius: 0.5rem; border: none;
    font-size: 1rem; font-weight: 600; cursor: pointer;
    background: var(--primary); color: white;
    transition: background 0.2s; margin-top: 0.5rem;
}
.btn:hover { background: var(--primary-hover); }
.login-right {
    flex: 1;
    background: url('/static/images/bg_l.webp') no-repeat center / cover;
    overflow: hidden; position: relative;
}
.login-footer {
    color: var(--text2); font-size: 0.8rem; margin-top: 1.5rem;
}
.login-footer a {
    color: var(--primary); text-decoration: none;
}
@media (max-width: 900px) {
    .login-left { flex: 1; padding: 2rem 1.5rem; }
    .login-right { display: none; }
}