/* Adaptado de /opn_back_original/static/login.html y alineado con theme HSI */
body.login-body {
    font-family: "Inter", sans-serif;
    min-height: 100vh;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    overflow: hidden;
    position: relative;
    color: var(--text-primary);
}

.login-bg-gradient {
    position: fixed;
    inset: 0;
    z-index: 0;
    background:
        radial-gradient(ellipse at 18% 40%, rgba(59, 130, 246, 0.26) 0%, transparent 52%),
        radial-gradient(ellipse at 82% 20%, rgba(124, 58, 237, 0.18) 0%, transparent 43%),
        radial-gradient(ellipse at 50% 95%, rgba(47, 52, 64, 0.48) 0%, transparent 52%);
}

.login-container {
    position: relative;
    z-index: 3;
    width: 100%;
    max-width: 430px;
    padding: 20px;
}

.login-card {
    background: rgba(35, 39, 48, 0.9);
    backdrop-filter: blur(14px);
    border: 1px solid var(--border-subtle);
    border-radius: 14px;
    padding: 36px 30px;
    box-shadow: 0 20px 52px rgba(0, 0, 0, 0.45);
}

.login-logo {
    text-align: center;
    margin-bottom: 28px;
}

.login-logo-badge {
    width: 62px;
    height: 62px;
    border-radius: 14px;
    margin: 0 auto 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.92), rgba(124, 58, 237, 0.88));
    color: #fff;
    font-size: 1.58rem;
}

.login-logo h1 {
    margin: 0;
    color: var(--text-primary);
    font-size: 1.35rem;
    letter-spacing: -0.2px;
}

.login-logo p {
    margin: 4px 0 0;
    color: var(--text-secondary);
    font-size: 0.83rem;
}

.form-label {
    color: var(--text-secondary);
    font-size: 0.79rem;
    margin-bottom: 7px;
}

.form-control {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    border-radius: 10px;
    padding: 12px 14px;
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-control:focus {
    background: var(--surface-elevated);
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.22);
    color: var(--text-primary);
}

.btn-login {
    width: 100%;
    padding: 12px;
    margin-top: 4px;
    border: 1px solid transparent;
    border-radius: 10px;
    background: linear-gradient(180deg, #3B82F6 0%, #2563EB 100%);
    color: #fff;
    font-weight: 620;
    letter-spacing: 0.2px;
}

.btn-login:hover,
.btn-login:focus {
    filter: brightness(1.06);
}

.btn-login:disabled {
    opacity: 0.72;
    cursor: not-allowed;
}

.login-error {
    display: none;
    margin-top: 12px;
    padding: 10px;
    border-radius: 9px;
    border: 1px solid rgba(255, 31, 31, 0.5);
    background: rgba(255, 31, 31, 0.16);
    color: #FF9A9A;
    font-size: 0.84rem;
}